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An industry standard for more than 70 years, Thomson proudly serves precision industries with specialty and production runs of standard and non-standard balls. At our A2LA accredited calibration laboratory, our precision balls are made with pride and ideal for bearings, ball screws and many more applications.
Also known as chrome steel, 52100 is an extremely hard and wear-resistant material and has high load capacity.
400 Series (Hard Stainless) 400 Series are one of the hardest types of stainless steels after heat treating. It has magnetic properties.
300 Series stainless steel is a good all-around choice for a wide range of applications. It is corrosion resistant in high-temperatures and is slight to non-magnetic.
For high temperatures or applications where weight and hardness are required. Lower coefficient of thermal expansion.
Titanium, S2 Tool Steel, Aluminum and Brass.
Glass, Tungsten Carbide, Carbon, Nylon or Delrin materials.
E52100 - Also known as chrome steel, 52100 is an extremely hard and wear-resistant material and has high load capacity.
HCC DFARS - Chrome steel with DFARS compliance certification is designed for aerospace applications.
HCC Vac Melt - Chrome steel with advanced metal processing to ensure that the material maintains its purity during the melt.
440C - 440 steels are the hardest of all the stainless steels, making them both abrasion-resistant as well as corrosion-resistant.
440C DFARS - Similar to 440C, designed for aerospace applications steel with DFARS compliance.
440C Vac Melt - 440C material with advanced metal processing to ensure that the material maintains its purity during the melt.
440A - Type 440A Stainless Steel has similar physical properties to 440C with a lower carbon level for workability.
420C - Since 420C stainless steel's properties make it durable in a variety of different environments, it is one of our most versatile options for a wide range of applications.
BG-42 - As a Ball Bearing steel using VIM/VAR technology. What made BG-42 unique is the addition of Vanadium, increasing the wear resistance.
302 - Is non-magnetic and is not hardenable by heat treatment. Alloy 302 is usually used in its non-annealed condition.
316L - Stainless steel possesses less carbon and molybdenum than typical 316 steel, which yields higher corrosion characteristics and higher higher temperature values.
304 - Has good corrosion resistance and good formability. Grade 304 is non-magnetic.
430 - Type 430 Stainless steel is an unheated treated, economical stainless material that provides corrosion resistance at low cost.
Silicon Nitride - A popular choice for high precision applications. 60% reduction in weight compared to steel and up to twice the hardness and 70% of the coefficient of thermal expansion.
Alumina Oxide - Alumina Oxide Balls are lighter, harder and more corrosion resistant, require less lubrication, and have a lower thermal expansion than their steel counterparts.
Zirconia Oxide - High strength material that performs well in temperatures up to 1000 F.
Titanium - Lightweight and highly inert material with exceptional anti-corrosive properties. Operates in high temperature environments.
S2 Tool Steel - Tool Steel balls are designed to work well in very extreme conditions. These balls have unusually good wear characteristics due to the materials' hardening capabilities.
Aluminum - Aluminum balls are used in Automotive and Aircraft Applications, where durability, hardness & weight are factors.
Brass - Brass has corrosion resistant properties that are similar to Bronze, with greater tensile and yield strengths.
Glass - Fairly inert material and able to withstand high temperatures. Excellent resistance to acids and chemical attack.
Tungsten Carbide - Tungsten Carbide balls are used in a variety of applications where extreme hardness and wear resistance is required. Tungsten Carbide is a superior alternative to steel where severe conditions occur.
Carbon - Carbon steel balls are used in automotive applications, for semi-precision bearings, and in commercial applications where corrosion resistance is not needed.
Nylon - Excellent material for corrosion resistant applications where a low coefficient of thermal expansion is required and noise control.
Delrin - Effective, economical substitute in low load bearings applications. Plastics are used where a lightweight material is desired.
Thomson Precision Ball offers a wide range of material for your applications. We have standard and non-standard materials and the technical experience to guide you through the material selection procress.
Industrial Atmosphere | Hydraulic Oils (Petroleum) | Fresh Water | Salt Water | Food Products | Fruit and Veggie Juices | Milk | Alcohol | Hydrochloric Acid (40%) | Sulfuric Acid (40%) | Phosphoric (40%) | Nitric Acid (40%) | Citric Acid | Ammonia Liquid | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
52100 Chrome | C | A | D | D | - | - | - | C | - | - | - | - | C | B |
440C Stainless | B | A | C | C | B | - | A | A | D | D | A | A | A | A |
302 Stainless | B | A | B | B | A | - | A | - | - | - | A | - | - | - |
316 Stainless | B | A | A | A | A | A | A | A | D | D | A | A | A | A |
Brass | C | B | C | C | D | - | C | C | - | D | D | - | D | - |
Monel | C | A | A | B | D | C | C | A | D | - | C | - | - | A |
Nylon | A | A | A | A | - | A | A | A | D | D | D | D | C | - |
Viton | A | A | A | A | A | A | A | A | A | A | A | A | A | D |
Ceramic | A | A | A | A | A | A | A | A | C | D | C | A | A | A |
Titanium | - | - | - | - | - | - | - | A | C | C | - | A | A | - |
Made with pride, backed by accreditations:
Manufacturing Capabilities
Holding ourselves to the higher standard:
NEWS:- You Should Know-
440C DFARS Readily Available- 1/16”, 3/32”, 1/8”, 5/32”, 3/16”, 1/4”, 5/16”, 11/32”, 3/8”
Meets DFARS 7009/7014, AMS 5880, AMS 5630, QQ-S-763, ASTM A276, AMS 2759, ASTM F2215, HRC 58-62, AMS 2700, NADCAP Heat Treat
NADCAP Passivation, Retained Austenite Available
Step inside Thomson Precision Ball Company and see how its ISO 9001:2015-certified facility, A2LA-accredited laboratory and experienced employees have helped it become a trusted precision ball manufacturer for 75 years and counting.
Pioneer Steel Ball was founded in 1946 in Unionville, Connecticut by five men who had extensive experience in the steel ball industry. The idea to form the company took root several years earlier, but since the founders did not want to jeopardize the war effort in any way, they waited until the war had ended. In the forties and fifties, Pioneer, produced carbon steel balls for bearings and the automotive industry. In addition, the company manufactured a variety of steel sizes and shapes for the burnishing industry. Pioneer’s growth outpaced their capital and in the early ‘50s they sold the company to Pittsburg Steel with the option to repurchase it at a later date. Unfortunately, they bought back the company a few months before the devastating hurricane and flood of 1955. Located on the banks of the Farmington River, the company took a direct hit and was destroyed. However, it was rebuilt by two of the former five partners who later expanded the product lines to include High Carbon Chrome SAE 52100 as well as a full line of stainless steel types: 440C, 302, 316. The partners also added lapping machines to produce tighter tolerances and improved surface finish. One of their greatest accomplishments was to develop the 36” flashing machine, the largest at that time. This accomplishment was the result of their combined expertise which had been acquired over sixty years in the steel ball business. Pioneer’s innovative leadership continued with the development of extremely strong hollow stainless steel 440 balls for the air cargo industry. They also developed a special stainless steel type 431 gold- plated with extremely high tolerance for the automobile air bag deployment mechanism.
A second company in the industry, ABEK, had been founded in 1976 by two people with 20 years of miniature ball- making experience. Unlike Pioneer, which specialized in small to large balls, ABEK specialized in miniature balls that were 1/16 of an inch in diameter or smaller. With its expertise in this area, ABEK was able to manufacture high precision balls as small as .012 inches and became a leader in this field.
It was this expertise, combined with Thomson Industries determination to have a USA supplier of high quality, that had led it to purchase ABEK in 1982. Once the purchase was finalized, approximately 14% of ABEK’s sales were to Thomson divisions. At that time, ABEK manufactured the miniature and small balls sizes, and purchased the larger sizes from Pioneer, which it then sold to Thomson. ABEK, was combined with Pioneer in 1988 to form Thomson Precision Ball. This enabled Thomson Industries to satisfy all of its’ ball requirements. Approximately 14% of Thomson Precision Ball capacity is still dedicated to Thomson Industries.
DFARS 440C Aerospace Precision Balls | 135 KB | |
Silicon Nitride Precision Balls | 136 KB | |
Overview of Standard and Non-Standard Precision Balls | 118 KB |
Precision Balls | 2719 KB |
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