Few manufacturers are as open about their in-house heat treatment capabilities as  chain manufacturer Allied Locke in Dixon, Illinois, USA. Over the course of the past two years “The Monty” has had a number of updates about how the company continues to invest and grow their heat treatment department-a few of these updates can be found below.

Earlier this week Gord Montgomery had the chance to see in person the updates since our last visit earlier this year. Updates include an expanded metallurgical lab with more equipment, updated controls for another of the batch IQ furnaces, a completely rebuilt and modernized endothermic generator and a 1500 pound per hour mesh belt furnace line with polymer quenching which will be in production just a couple of months from now.

Almost undoubtedly all captive heat treat departments go through similar updates, expansions and upgrades on a regular basis but seldom do we get to see such a “catalogue” as can be seen in these photos.

“FEBRUARY 2023, DIXON, IL. In House Heat Treater Reaches Milestone; Over the course of the past few months, we have had several press releases about one of the larger in-house heat treaters in North America, Allied Locke in Dixon, Illinois. The firm is now sharing that their heat treat supervisor, Dan Cover is celebrating a very impressive milestone, 37 years working for the company. Dan can be seen below along with a photo of part of the batch IQ department.

​In related news Allied has shared with “The Monty Heat Treat News” a number of photos of some of their recent additions which includes more batch IQ capacity and a third mesh belt furnace line. These will be upcoming.

“JANUARY 2023; In House Heat Treater Expands-Allied Locke Update; Last week we had an interesting item about a US firm by the name of Allied Locke in Dixon, IL expanding their in house heat treat department (the original story can by found at this link In House Heat Treater Continues to Expand Heat Treat Department | The Monty and also below). As it turns out what your read was only part of the story, we can now add these further details;

​In addition to the details provided last week we can also say that Allied will be investing in a controls system update for their batch IQ furnaces and generators which is being provided by SSi of Cincinnati, Ohio-hold on we are just getting started. Other projects include 2 small vacuum furnace additions and upgrades to their robotic induction heat treating equipment.

We will also issue a correction, it would appear that the company will have 3 mesh belt furnace lines as opposed to 4. All in all an extremely impressive investment.

​”NOVEMBER 13th 2022. In House Heat Treater Continues to Expand Heat Treat Department; Headquartered in Dixon, Illinois, USA Allied Locke is a manufacturer of chain and chain products. Founded in 1965 as Allied Chains the company has grown and prospered over the years and now has five divisions: Agricultural Chain, Precision Roller Chain, Industrial Chain, Sprockets, and Environmental Products. The primary manufacturing facility (Plant 1) in Dixon, IL covers nearly 675,000 square feet. Home – Allied-Locke Industries (alliedlocke.com)

The firm has always considered heat treating to be a “core competency” and to that end they have continued to invest and expand their heat treat department, to the point that it is becoming one of the larger captive heat treaters in the US. Currently Allied has 6 batch IQ furnaces, each 36″ X 72″ X 36″, 3 Can Eng mesh belt furnace lines and related equipment including endothermic generators. As we speak a 4th Can Eng mesh belt line is being installed and plans include one more batch IQ line.

​At the same time the company has recently installed what was described to us as an “amazing, new” metallurgical lab and is working towards CQI-9. So often heat treating is an afterthought in manufacturing firms and is relegated to that dark dirty area at the back of the plant. It makes our day at “The Monty Heat Treat News” to see that some companies rightfully understand the importance of heat treating-Allied Locke is certainly one of these.”

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“Wisconsin Oven is pleased to announce the shipment of one (1) Electrically Heated Drop Bottom Furnace with traveling quench tank and maintenance platform. This system will be used for the solution heat treatment of aluminum parts for the aerospace industry.
 
The drop bottom furnace has a maximum operating temperature of 1,100°F and effective workspace dimensions of 3’6” W x 3’6” L x 4’0” H. An OSHA compliant maintenance platform provides ease of access for personnel to service the equipment. The quench tank capacity is approximately 1,700 gallons and includes fluid level control (low, fill, high), a lockable water drain port at the bottom of the tank, and an agitator for water circulation. The traveling quench tank is enclosed with safety fencing for added safety during operation.    
 
This drop bottom furnace is designed with sufficient capacity to heat 600 pounds of aluminum per load and provide a quench delay that does not exceed 5 seconds. The system also includes a slow drop speed program to be used for heating applications that do not require a quench. Click on this link to watch a video of this system in operation.
 
“This drop bottom furnace was designed with a 5 second quench delay, and a temperature uniformity of +/- 5°F at the set points 850°F and 1,100°F. In addition, the system was tested to be in compliance with AMS 2750F, Class 1 furnaces and Instrumentation Type C prior to shipment from our manufacturing facility.”  – Mike Grande, Vice President of Sales”
 
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​“The Monty Heat Treat News” is proud to present our list of the 10 largest North American furnace builders as ranked by 2023 sales. Before we get to our list we would like to make some points about how we arrived at these rankings;

· It is important to note that this list only includes furnace suppliers who manufacturer in North America. This is an important distinction in that some well known brands in North America will not be included as they manufacture the majority of their products outside of North America. Examples include such well known brands as SECO/WARWICK, ECM, ALD, Nitrex and TAV.

· North America of course includes the USA, Mexico and Canada, both Canada and Mexico have one company each on this list.

· Our list included suppliers of both atmosphere and vacuum furnaces. Apples to oranges comparison? Perhaps because the atmosphere market is substantially larger than the vacuum market but having said that the largest builder by far is almost exclusively vacuum.

· Another distinction we should point out is that this list only includes firms who focus on the heat treat industry. Our list does not include suppliers who concentrate on other industries such as the steel industry or foundries.

· Sales for each of these companies includes new furnaces, spare parts, rebuilds and ancillary equipment.

· Sales figures came from a number of different sources. In the case of Ipsen it is a publicly traded firm so sales figures are relatively easy to come by. Solar Manufacturing is always very forthcoming with their sales figures, we thank Mr. Bill Jones, CEO for his openness. In most other cases we were given sales figures on the basis that they were not shared. Gasbarre, and McLaughlin two companies on our list have provided a rough idea of their sales in recent articles/Interviews.

· Each of these companies has sales of $20 million or over. Other companies which we considered and which would be on a list of the 20 largest include Vac Aero, Williams, CEC, Lindberg, Abbott, GM Enterprises (which is under the Nitrex banner) and Centorr Industries.

· All figures in USD

· We thank everybody who helped us on this project.

1) Ipsen USA, Rockford, Illinois. With 2023 sales of over $110 million USD vacuum furnace builder Ipsen USA had sales almost double that of the second largest furnace builder. Of this total 50% is new equipment and 50% aftermarket (parts, service, hot zones). Ipsen is based in Kleve, Germany which produces Ipsen’s line of atmosphere furnaces while Ipsen USA builds vacuum furnaces for the global market.

“Excellence in thermal processing allows you to push the boundaries of what’s possible: whether it’s transforming space exploration, crafting better medical implants or developing more efficient cars and jet engines. Backed by more than 75 years of experience, our global team works in concert so that manufacturers and commercial heat treaters can innovate with confidence.” https://ipsenglobal.com/

2) AFC-Holcroft, Wixom, Michigan. We would suggest with little hesitation that AFC-Holcroft of Wixom, Michigan is the largest manufacturer of atmosphere heat treating furnaces in North America. Over the years the company has built just about every configuration of atmosphere furnace there is although they are best known for batch IQ furnaces and pushers. “AFC-Holcroft, L.L.C. is a leading manufacturer of industrial furnace systems used in the heat treatment of ferrous and non-ferrous metals. Building on the traditions of Holcroft & Company dating back to 1916, AFC-Holcroft services clients across the globe. AFC-Holcroft was created as an L.L.C. in 2000, then purchased by the AICHELIN Group in 2016.

AFC-Holcroft produces high quality thermal processing equipment used in the production of metal components, and provides related aftermarket service. Customers include both captive and commercial heat treaters who supply components to various industries such as automotive, heavy truck, industrial bearings and gears, railroad, fasteners, mining, aluminum heat treatment, and others.” https://afc-holcroft.com/

3) Surface Combustion, Maumee, Ohio. Surface Combustion in Ohio is probably the oldest company on our list with a history which stretches back over 100 years. Privately owned they have built just about every style of furnace out there but they are best known for their line of “Allcase” batch IQ furnaces of which the company has built literally 1,000’s making it the most common furnace in North America; “For over 100 years, Surface Combustion has been the leader in industrial heat treatment solutions. From our signature Allcase® Batch Integral Quench Furnace to tried and proven vacuum furnace options and customized engineered products, we are your source for all heat treat and thermal processing needs.

We work with all industries including agricultural, automotive, biomass, oil & gas, and powder metals and so many more. We are also an excellent resource for rebuild and retrofit services as well as maintenance and operation.” https://www.surfacecombustion.com/

4) Can Eng, Niagara, Falls, Ontario, Canada. Can Eng International in Niagara Falls, Ontario, Canada is our only Canadian furnace builder on this list. The company is best known for their mesh belt furnace lines and aluminum capabilities; “CAN-ENG Furnaces International Ltd. was established in 1964 and has grown to become a leading global designer and manufacturer of thermal processing equipment for ferrous and non-ferrous metals.

We focus on the development of high volume batch and continuous industrial furnace systems for challenging applications. Our rugged furnace designs have served commercial and captive heat treaters, stamping and fastener companies, automotive component producers, the iron and steel industries, aluminum foundries, agricultural, construction and appliance manufacturers for over 60 years and we have an international reputation for design innovation, quality workmanship and a dedication to service.” https://www.can-eng.com/

5) AVS Inc., Ayer, MA. AVS is a privately held company owned by Jake Krashan. “AVS is a manufacturer of custom, high-temperature vacuum and pressure furnace equipment for

customers worldwide. AVS is a vertically integrated manufacturing facility, with full capabilities including design and engineering, ASME code-certified welding, mechanical assembly, electrical design and assembly, controls programming, and complete functional testing. AVS has a main manufacturing facility in Massachusetts and a supplemental facility in New Hampshire with over 40,000 square feet of manufacturing space for systems up to 26 feet in height. Two 10-ton and two 20-ton overhead cranes, cooling water system, and 3000 amps on site allow AVS to completely build and full-temperature test every furnace before it leaves the facility.” https://avsinc.com/

6) Solar Manufacturing, Souderton, PA. We would consider Solar Manufacturing to be the second largest vacuum furnace builder on our list because of their laser focus on vacuum heat treating only. The firm is always very open on their sales figures and we quote; Solar Manufacturing Inc. sales for 2023 to the North America market were $24.5 million for 24 furnaces and major hot zone rebuilds. Sales were to the Aerospace, Medical, Commercial HT, and General Manufacturing, non automotive. All applications were vacuum heat treating furnaces, non atmospheric or flammable atmospheres like hydrogen, natural gas, and the like. Solar Mfg. is in a 40;000 square foot plant dedicated to our vacuum furnace mfg. business and has 56 full time employees. This means our sales per employee is $437,500. USD.

“Solar Manufacturing is a privately held, U.S.-based company providing technologically advanced vacuum heat treating furnaces designed and built to be the most energy efficient, cost effective, and highest performance furnaces on the market. With decades of experience as its foundation, our team offers unmatched expertise in solving our customers’ most difficult heat treating problems. Together with our affiliate Solar Atmospheres, we continually develop new solutions to vacuum processing applications and improve the science of vacuum furnace technology.” https://solarmfg.com/

7) Gasbarre, St. Marys, PA. “Founded in 1973, Gasbarre Thermal Processing Systems is located in St. Marys, PA and has grown to have approximately 80 employees dedicated to serving the thermal processing industries worldwide. Gasbarre designs, manufactures, and services a full line of thermal processing equipment for virtually any process. Gasbarre’s offering includes continuous and batch atmosphere equipment, and continuous and batch vacuum furnace lines that serve a wide range of thermal processing applications and can be adapted to nearly any production process.

In 2023, Gasbarre moved into a state-of-the-art facility with 150,000 sqft of manufacturing space to support their continued growth. Gasbarre is dedicated to serving its customers by providing products and services that combine value and design flexibility through knowledge and understanding of their customer’s processes.” https://www.gasbarre.com/thermal-processing-systems/

8) McLaughlin Furnace Group, Avilla, IN. Quite possibly the fastest growing company on our list is McLaughlin Furnace Group and this is how they describe themselves; “McLaughlin Furnace Group is much more than the maintenance and repair shop it began as in 2007. In the beginning,

McLaughlin Services only offered complete furnace rebuilds, including structural fabrication, refractory, piping, rigging, mechanical assembly, electrical, and controls.

But it didn’t take long for the Avilla, Ind., company to branch out. Shortly after opening its doors, McLaughlin Services started fabrication of car-bottom, temper and atmosphere furnaces, and support equipment. Since then, this MTI Diamond Member has started supplying custom flow panels and piping as well as custom, easily expandable endothermic generators.” https://www.mclaughlinsvc.com/

9) Mattsa Furnace Company, San Luis Potosi, Mexico. Founded more than 25 years ago by Mr. Carlos Torres Mattsa in the only Mexico based furnace builder on our list. The company offers a very wide variety of heat treat furnaces which includes batch IQ furnaces, rotary hearths, mesh belts and roller hearths. Mattsa is the AFC-Holcroft licensee in Mexico and the relationship has been a long and prosperous one. Associated with Mattsa is commercial heat treater CRIO also located in Mexico. https://www.mattsa.com.mx/wp/en/home/

10) Rogers Engineering, Cambridge City, IN. Rounding out our list of the 10 Largest is privately owned Rogers Engineering in Cambridge City, Indiana While not as well known as many on the list their products will chiefly be found in captive heat treat operations; “ROGERS ENGINEERING is a world-wide leader in furnaces and other heat treatment related products and services. We supply equipment in the United States and 14 countries throughout the world, with a customer list consisting of the top companies in the world. Also offering, a full range of heat processing equipment ranging from batch through continuous and supporting atmosphere producing equipment. Rogers’s equipment is noted for its robust design, ease of maintenance, and low operating cost.” http://rogersengineering.net/

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The Monty Heat Treat News has worked closely with International Search Partners (a US search firm known for being the only recruiting firm in the world working exclusively in heat treating), for over 20 years. That relationship has blossomed into a regularly featured article, “Ask the Heat Treat Recruiter,” where ISP’s seasoned team answers questions about salaries, interviewing, negotiations, and a host of other topics related to recruiting and job searching for companies and/or individual employees.

Managing Recruiter, Josh Hale and Sr. Recruiter, Jessica Maier, address the most common question that comes up when talking to people in the industry:

What are the average salaries for a heat treater right now?

In the early post-pandemic days wages were rising incredibly fast and, while the upticks have slowed down a bit, salaries are continuing to go up to meet market demand for talent. It remains a “candidate’s market” and, whereas we previously saw “good” offers for new hires equate to roughly a 10-15% increase in salary, today’s workers are demanding (and getting) 20%+ to switch companies.

Recognizing these overall market conditions, here are some “back-of-envelope numbers” for the most common jobs within a commercial heat treat in 2024…

Furnace Operators – The bottom line is that every commercial heat treat is hurting for production hourly workers right now and those laborers have seen their wages increase with demand. As recently as a few years ago, operators were earning in the low teens to the low twenties, but those averages have risen to $25+/hr plus the availability for OT.

Field Service Engineer – For the entirety of ISP’s existence (25+ years), FSEs have been one of the most in-demand and difficult to recruit for and hire positions. As such, they are well compensated with most good field techs taking home well over $100k when factoring OT and per diems. The most recent hires that we’ve made in this area have been starting in the $33-40/hr range.

Maintenance – The demand for in-house maintenance has boomed over the past 2-3 years and wages for these professionals along with it… these days expect to pay $40 or more per hour for a seasoned maintenance mechanic and upwards of $125-150k+/yr for a strong manager with preventative maintenance and supervisory responsibilities.

Quality Engineers/Managers and Metallurgists – There can be a lot of variation for base salaries between plant metallurgists, lab metallurgists and those who specialize in quality, but as with all positions in heat treat, the supply-demand ratio has led to an increase in pay, with current salary ranges from $70-$125k and above depending on the level of experience and technical expertise required.

Design Engineers (mechanical and electrical) – Engineering and design is another job function that has seen a large increase in need since the pandemic. OEMs can expect to pay degreed mechanical engineers with experience near or above $100k and experienced PLC programmers or EEs are earning $125-150k. Some companies have found success hiring recent grads and offering training programs, which can of course be more affordable with starting salaries for engineers closer to $60-70kish.

Sales Engineers – Business development deserves special attention because of the variable nature of commission-based compensation; however, a good salesperson is worth their weight in gold and market rates for their talents reflect that fact with base salaries rising to the low $100ks for someone with experience in the industry, who can easily take home $150-175k+/yr with incentives. Typically, technical salespeople working for furnace manufacturers will earn more than commercial heat treat BDMs who are usually compensated at the lower end of that range.

Plant Managers/GMs – It’s difficult to give a reasonable range for managers because many factors come into play, such as size of company, number of employees, location, etc., but also at the top of the pyramid titles can be somewhat nebulous and a “Plant Manager” at one company might be more akin to a “GM” at another. Trends for leadership roles have been to include more variable compensation in the form of bonuses, commissions, or even a path to equity. As with all roles within the heat treat industry, there is more need for companies to hire managers, supervisors, and executives, than there is qualified talent. As such, compensation and incentives have been instituted to lure more people to the industry.

If a position you work in or are thinking about hiring for wasn’t mentioned, or you would like to discuss specifics, please feel free to reach out to Josh or Jessica via LI or at the contact info below. Also, let us know your other questions for future editions of “Ask the Heat Treat Recruiter!”

Josh Hale has collaborated with companies to identify, engage, and hire top performers as a professional “headhunter” where he’s focused exclusively on the heat treat industry as part of International Search Partners since acquiring the firm in 2015. He works closely with Jessica Maier to support the practice, and, together, they’ve helped dozens of companies and hundreds of candidates find the match within the industry, including roles for engineering, sales, quality, metallurgy, management, and more. For additional information email [email protected] or call 619-465-9621.

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Solar Manufacturing, Inc. recently announced the hiring of Nicholas Max, BSME Drexel University, as its Chief Mechanical Engineer to head up its vacuum furnace mechanical design group. Nick is also pursuing an MBA at Lehigh University in Bethlehem PA.

Nick will be tasked to lead the further development of Solar Manufacturing’s energy efficient hot zones, vacuum vessels, high pressure gas quenching systems, and vacuum pumping systems. Nick was a Program Manager in his last position and led a team of design engineers who were focused on the development of specialty battery technologies for space and defense applications.

Bob Wilson, VP of Engineering stated, “Nick will be an excellent addition to our design team from his rich, multi-disciplinary industrial experience of the past 10 years. He will work alongside me for the next couple of years as I prepare for eventual retirement. The company will be well-positioned to continue its excellent reputation as an industry leader of robust vacuum furnace designs.”

Solar Manufacturing designs and manufactures a wide variety of vacuum heat treating, sintering, and brazing furnaces. They also offer replacement hot zones, spare parts, and professional service. To learn more about Solar Manufacturing visit us at solarmfg.com or call 267-384-5040.

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“Solar Atmospheres’ newest acquisition, Solar Atmospheres of San Diego, is pleased to announce the addition of Chris Constable as their new Vice President of Operations. Chris brings with him nearly 25 years of Heat Treating experience that includes quality, operations, management, plant safety, business development, and sales. Chris is well suited to understanding the customers’ needs and providing effective solutions to their most difficult challenges. Coupled with the Solar Atmospheres knowledgeable and dedicated team, Solar Atmospheres of San Diego stands ready to provide high-quality heat-treating services with a focus on honesty and integrity and a reliable customer service experience.

Derek Dennis, President of Solar Atmospheres of California, states, “We are very fortunate to introduce Chris into the Solar Family of companies. As a highly disciplined business leader, Chris has the experience and knowledge to lead the Solar San Diego team through the new acquisition and establish a solid foot hold in the Southern California heat treat and brazing market. I enthusiastically welcome Chris to the Solar team and look forward to working with him in the growth of the Solar San Diego operation. Truly exciting times for Solar Atmospheres!” For more information about the Solar Atmospheres of San Diego facility, visit solaratm.com, or contact Chris directly at 619-593-3636 ext. 1933, or [email protected].”

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“T.Ş.T Lift Amortisör recently upgraded its gas spring manufacturing in Bursa, Türkiye, by integrating a Nitrex nitriding/nitrocarburizing system. This move signifies the company’s commitment to adopting environmentally sustainable practices within its operations. Through this upgrade, T.Ş.T Lift replaces traditional salt bath nitrocarburizing with Nitreg® technology to enhance both the quality of its spring products and the efficiency of its manufacturing facility using a greener alternative.
 
The Nitrex system offers a comprehensive solution featuring three advanced heat treatment technologies that enhance the customer’s production capabilities: Nitreg® for controlled nitriding, Nitreg®-C for controlled nitrocarburizing, and ONC® for in-process post-oxidation, tailored specifically for treating gas spring rods for automotive, industrial, and furniture applications. These technologies ensure precise control over uniform case depths and nitride / nitrocarburizing layer formation, enhancing the mechanical properties of the gas spring rods. While Nitreg® and Nitreg®-C enhance surface hardness and fatigue resistance, ONC® improves corrosion resistance and the aesthetic appeal of the finished product.
 
The batch-type furnace, equipped with an accelerated cooling system, is a nod towards efficiency. It shortens process times, expediting lead and delivery times while optimizing furnace utilization to drive cost savings. Additionally, since the system operates at lower temperatures compared to salt bath nitrocarburizing, it minimizes part distortion and eliminates the need for post-finishing operations by delivering a cleaner surface, streamlining the manufacturing process.
 
Utku Inan, Nitrex sales representative in Türkiye, emphasized, “In my experience with numerous Turkish clients, we prioritize delivering solutions that enhance manufacturing efficiency and sustainability. The successful startup in March 2024 allowed T.Ş.T Lift Amortisör to transition seamlessly to new production, and we’re dedicated to supporting them as they phase out their reliance on salt bath treatments.”
 
Marcin Stoklosa, Technical Sales Manager – EMEA region at Nitrex, shared, “The need for today’s manufacturers to improve product performance while keeping sustainability in mind has never been more apparent. T.Ş.T Lift Amortisör’s adoption of Nitrex nitriding and nitrocarburizing technologies exemplifies this imperative. This transition isn’t just about technological upgrades; it’s about aligning production standards with global sustainability initiatives for a greener future.”
 
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Earlier this year Dale and Gord Montgomery of “The Monty Heat Treat News” visited one of the 50 largest commercial heat treaters in North America, family owned Specialty Heat Treat in Houston, Texas (the story can be found at https://themonty.com/heat-treating-in-texas-is-different-specialty-heat-treat/). 
 
In that story we mentioned how the company was very close to bringing a 1,000 ton straightening press online-it is now a reality as you can see in this press release; 
 
“Specialty Heat Treat, Inc. Houston Texas now provides straightening capability to 1000 Tons. Pictured here is our new press at work on a 13” solid 8630 bar. Surface hardness is 341 BHN. Yield strength is 153,000 at mid wall!! Specialty now provides our customers with finish straightening operations for the larger material sizes that are becoming more common in the energy sector. Specialty offers straightening for small bars on a super fast 18 ton press, a 150 ton press handles the 2” to 3” range, mid sized bars and tubes are straightened on one of two 250 ton presses, and heavy bars and tubes run on one of two 400 ton presses, and now 1000 tons is available.”
 
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Regular readers of “The Monty” will need no reminder of how crucial heat treating is to the manufacturing process, however here is another example.
 
According to this press release a supplier of ball studs to truck suppliers Mack and Volvo used an experimental heat treat process which resulted in defective parts. We have no idea what the process was but we do know somebody is in trouble. 
 
“Volvo Trucks North America and Mack Trucks are recalling certain models of new trucks after discovering an issue with the steering system.
 
According to National Highway Traffic Safety Administration documents, Mack Trucks is recalling nearly 800 model year 2025 Anthem, Granite and TerraPro trucks. Volvo Trucks is recalling nearly 500 model year 2025 VHD, VN and VNR Electric trucks.
 
In trucks affected by the recall, the drag link may contain an improperly heat-treated ball stud that can fail, resulting in a sudden loss of steering control. A sudden loss of steering control increases the risk of a crash. There is no warning that may indicate ball stud failure.
 
Both Mack and Volvo Trucks are urging owners of affected trucks not to drive the vehicles until dealers inspect and fix the issue.
 
Recall reports indicate a supplier mixed improperly hardened ball studs, resulting from an experimental heat treatment process, with production-ready ball studs shipped to manufacturers. Mack was notified of the experimental ball studs on May 25, immediately prompting an investigation.
 
There have been no accidents or injuries associated with the recall issue. No warranty or customer complaints have been filed. Only one occurrence of a ball stud failure at a Volvo Group factory has been reported.”
 
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Recently “The Monty Heat Treat News” had an in-depth article about commercial heat treater “Haerterie Reese”, a firm in Germany who has the ability to heat treat gears up to 100,000 pounds-a truly remarkable feat. The article can be found below and also at https://themonty.com/carburizing-of-large-gears-haerterei-reese/
 
As an update to this article we now have approval to post these photos of what are fairly typical parts for Haerterei-typical for them perhaps but not for 99% of captive and commercial heat treaters around the world.
 
Carburizing of Large Gears – Haerterei Reese; Carburizing of large gears has been much in the news recently due to the closing in the USA of commercial heat treater Metlab who offered the largest commercially available pit carburizing furnaces in North America (https://themonty.com/metlab-ht-closing-giving-gear-suppliers-headaches/) As you can read in our original story it is quite possible that manufacturers of very large gears who lack the capability in house to heat treat might be forced to look as far afield as Germany which brings us to commercial heat treater Haerterei Reese.
 
“The Monty Heat Treat News” has been very familiar with the company for at least 15 years both as one of the largest commercial heat treaters in Europe but also due to the fact that they offer some of the largest pit carburizing furnaces in the world ( https://www.haerterei.com/ by the way Haerterei literally means “heat treater”). The company was originally formed as a gear manufacturer who incorporated heat treating in house, over the years this evolved to become strictly a commercial heat treater-Reese is a privately owned family business now in it’s third generation with co owners Philip and Julian Reese.
 
Reese has 300 employees in 4 locations, the headquarters is in Bochum, Germany (which “The Monty” visited) with two facilities in eastern Germany largely involved in the auto industry and a fourth plant in southern Germany catering to the tool and die industry.
 
The centerpiece of the gear heat treatment department is a gas fired pit furnace with working dimensions of 5 meters in diameter and 5.5 meters deep (approximately 15’ X 16.5’ deep), working in conjunction with this system is a 400,000 litre quench tank 21’ in diameter and 21’ deep and pit temper units. Weight capacity is over 100,000 pounds. While this is the largest furnace Reese also has other pit furnaces capable of handling shafts up to 18’ long.
 
While the Bochum plant is best known for the size of their pit furnaces their induction heat treat is comparably impressive and able to handle shafts up to 11 meters (33’) in length. Currently the company is investing in a brand-new Induction facility which will be located in a new adjacent building, when finished in 2 years this will be in total a 20 million Euro investment. Also in the works is a new induction facility in eastern Germany slated for January of 2025.
 
These photos don’t really do justice to the size of the pit carburizing facility but they at least give you an idea about how very large gears are heat treated.”
 
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