custom Precision Bearings

WM Berg manufactures custom bearings to accommodate virtually all precision mechanical assembly requirements and operating conditions within the aerospace, healthcare and motion control industries. Our precision bearings are custom manufactured to tight tolerances and put through rigorous quality inspections using full-contact CMM, video measuring and more.

Custom, specialty and standard bearing types we manufacture:

  • Angular contact ball bearings
  • Ball bearings
  • Roller bearings
  • Spherical bearings
  • Composite spherical bearings
  • Needle roller bearings
  • Linear ball bearings
  • Linear no lube bearings
  • Linear replacement bearings
  • Long-life® bearings
  • Oilless bearings
  • Thrust bearings
  • Roller thrust bearings
  • Straight sleeve bearings
  • Thermoplastic bearings

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custom precision bearings manufactured by WM Berg

Bearing Sizes

Custom bearings are available in a range of inner and outer diameters and lengths, in inches or metric. Standard bearings are also availble:

Dimensional tolerance of bearings varies by type, material and ABEC quality class:

We also manufacture custom bearings to military specifications:

Hardened ball bearings made from 440 stainless steel (bar) have the military specification QQ-S- 763/C Class 10 Type A, with the military finish specification of QQ-P-35 (clear passivate).

Oilless bearings made from brass (porous) have the military specification MIL-B-5687 Type 1 Comp. A and are lubricated with S.A.E. 40 oil.

Bearings used in temperatures ranging from -65° to 250°F with oil lubrication have the military specification MIL-L-6085, and for grease lubrication the specification is MIL-G-23827.

specialty bearings

Bearing Modification Options

W.M. Berg custom precision bearings are used in a variety of environments. Contact us with your application requirements and our engineers can help you design the right type of bearing.

Available modifications include:

  • Lubrication hole in outer ring
  • Integral contact seals
  • One closed end
  • Split bearings
  • Square shafting
  • Square mounting accessories
  • High temp bearings

Customize Bearings by material

WM Berg manufactures metal and plastic bearings in a wide range of materials including:

  • 17-4 Stainless steel
  • 400 Series martensitic stainless steel
  • 410 Stainless steel
  • 410 RC 23-25
  • 440C Stainless steel
  • 316 Stainless steel
  • 52100 Chrome steel
  • 52100 Hardened chrome steel
  • Low carbon steel
  • 1008 Carbon steel
  • C1075 Carbon steel
  • 6061-T6 Aluminum
  • 356-T6 Cast aluminum
  • Brass
  • Sintered bronze
  • Sintered bronze MIL-B-5687 type 1 oil impregnated
  • Steel-backed porous bronze & PTFE-lead
  • Thermoplastic
  • Reinforced thermoplastic
  • Fiberglass & epoxy resin matrix
  • Molybdenum disulfide filled nylon
  • Frelon lining
  • Teflon™ lining
  • TEFLON-MiL-P-19468

Types of Bearings Available for Customization

WM Berg manufactures many different types of bearings. Our engineers can customize standard bearings or design completely custom engineered bearings to meet your application needs.

custom needle bearing

Custom Needle Bearings

Berg manufactures custom drawn-cup needle roller bearings. Customization options include single or double-row rollers, open ends or one closed end, with or without cage, with or without lip seal. Drawn-cup needle roller bearings are ideal for applications requiring a compact, economical bearing arrangement including gearbox shaft supports, pulley supports, and chain drive sprockets

Common Applications Requiring Customized Needle Bearings:

  • Machine tools / Power tools
  • Printing equipment
  • Copiers & fax machines
  • Lawn & garden equipment
  • Radial piston pumps used in industrial equipment

WM Berg also offers standard needle bearings.

custom ball bearings

Custom Ball Bearings

Berg manufactures custom ball bearings with up to ABEC-7 tolerances. Customization options include single or double row, flanged or unflanged, open or shielded. Our stainless steel and plastic ball bearings are ideal for high-precision applications requiring close tolerances and high running accuracy.

Common Applications Requiring Customized Precision Ball Bearings:

WM Berg also offers standard ball bearings.

Custom Angular Contact Bearings

Berg manufactures non-separable angular contact ball bearings with up to ABEC-7 tolerances. Customization options include ball and cage material, contact angle, sealed or open, preloading, and lubrication hole for oil or grease. Angular contact bearings are ideal for high-speed operations that require rigidity and bearing load support.

Common Applications Requiring Customized Angular Contact Bearings:

  • Centrifuges
  • Dynamometers
  • Vacuum pumps
  • Machine tool spindles
  • Electric motors & generators
custom oilless bearing

Custom Oilless Bearings

Berg manufactures oilless (self-lubricating) bearings including plain or flanged ultra-precision, plain or flanged grade S.A.E. 30, and plain and flanged style. Customization options include bore size, bushing type, and lubricant type. With high bearing capacity and high impact/temperature resistance, oilless bearings are ideal for applications involving heavy loads and low speeds and are also suitable for operating environments where moisture or corrosion resistance is needed. 

Common Applications Requiring Customized Oilless Bearings:

WM Berg also offers standard oilless bearings.

custom spherical bearing

Custom spherical Bearings

Berg manufactures spherical bearings including self-lubricating and self-aligning spherical annular bearings, and spherical bearings with lubrication required. Customization options include bore diameter, single or double row, sealed or unsealed cage, dual or external raceway, plating, and material. Spherical bearings are ideal for applications involving heavy loads that require shock/vibration resistance.

Common Applications Requiring Customized Spherical Bearings:

  • Robotics
  • Conveyors
  • Packaging equipment
  • Textile manufacturing
  • Heavy industrial machinery

WM Berg also offers standard spherical bearings.

custom journal bearing

Custom Journal Bearings

Berg manufactures journal bearings (also called plain bearings or sleeve bearings) made from fiberglass and epoxy resin matrix with a Teflon™ liner and Duralon® coating. Customization options include material, bushing clearance, inner/outer diameter and length. Journal bearings absorb or redirect friction between moving mechanical parts, reducing noise and vibration. Sleeve bearings are extremely versatile and are used in countless applications involving linear, rotating or oscillating movement.

Common Applications Requiring Customized Journal Bearings:

  • Heavy-duty industrial machinery such as pumps, turbines, blowers, compressors & fans
  • Industrial electric motors and gearboxes
  • Interior aircraft systems such as cockpit controls, doors, seats and storage bins
  • Medical technology such as prosthetic joints, dialysis machines & adjustable beds

WM Berg also offers standard journal bearings.

custom linear bearing

Custom Linear Bearings

WM Berg manufactures linear ball bearing slides with an open or adjustable diameter style. Customization options include inner and outer diameter, and length. Linear ball bearings are ideal for applications requiring smooth, precise single-axis linear movement.

Common Applications Requiring Customized Linear Bearings:

  • Material handling
  • Robotic machinery
  • Cutting machinery
  • Automated manufacturing
  • Automated windows
  • Sliding drawers
  • Sun tracking solar panels

WM Berg also offers standard linear bearings.

Custom Plain Linear Bearings

WM Berg manufactures plain linear bearings used to support a load in single-axis linear movement, as in a linear guide assembly. Customization options for our linear no-lube bearings include closed, open or adjustable style, inner diameter, outer diameter, and length. Linear replacement bearings are available in Duralon® style and can be custom made to size.

Common Applications Requiring Customized Plain Linear Bearings:

  • Medical scanning equipment
  • Cutting machinery
  • Industrial robotics & automation
  • Sliding doors
  • 3D printers
custom roller thrust bearing

Custom Thrust Bearings

Thrust bearings support axial loads (force applied in the same direction as the shaft), reduce friction and allow rotation of mechanical parts. Standard and customized thrust bearings are available in C1075 carbon steel or 410 stainless steel, sized to fit your specifications. Thrust ball bearings are ideal for applications involving high speeds and light loads, and roller thrust bearings are ideal for applications with heavy loads. 

Common Applications Requiring Customized Thrust Bearings:

  • Industrial machinery with rotating shafts such as generators, compressors, blowers, pumps & turbines
  • Medical technology with rotating shafts such as dialysis machines, blood or infusion pumps, endoscopes, centrifuges, cutting tools & more
  • Fans used in aircraft air supply systems
  • Fluid control valves
  • Machine tools

WM Berg also offers standard thrust bearings.

Custom roller Bearings

Roller bearings use cylinders as rollers instead of balls. Roller bearings can handle heavier loads than ball bearings and may include multiple rows of rolling cylinders to increase load capacity. WM Berg manufactures roller bearings in two types: needle roller bearings and thrust roller bearings.

Common Applications Requiring Customized Roller Bearings:

  • Air cargo handling systems
  • Industrial conveyor systems
  • Medical imaging equipment
  • Precision motion control systems used in robotics or machining

Custom thermoplastic Bearings

WM Berg manufactures thermoplastic bearings in a sleeve or flanged style. Thermoplastic bearings are corrosion resistant, making them ideal for use in cleanrooms, foodservice applications and harsh or corrosive operating environments.

Common Applications Requiring Customized Roller Bearings:

  • Pharmaceutical & chemical manufacturing
  • Packaging equipment
  • Motorized camera jibs
  • Ski bindings
  • Prosthetic joints
  • Adjustable seating

Our Precision Bearing Manufacturing Process

WM Berg has been the leader of premium precision part engineering and production for over 50 years. Working with a custom precision bearing manufacturer has never been so easy. Our product experts connect with you every step of the way from design and manufacture to shipping and installation support. Our production process uses AQL sampling and lean manufacturing tools to deliver consistent quality, repeatability and economy.

technical drawings of open, shielded, and sealed bearings

Benefits of Going Custom with the Original Manufacturer

Standard precision bearings are well suited for applications powered by newer equipment. A custom OEM bearing allows long-term use of existing machinery and improved ability to evolve and optimize mechanical operations as business needs change. Additional benefits include:

  • Guaranteed fit & function 
  • Faster production times
  • Quality assurance 
  • Reduced long-term replacement costs
  • 1-year warranty 

Partner with WM Berg to Define Your Custom Bearing Design Needs 

From concept to prototype through production, our design, application, and mechanical engineers provide innovative solutions from our world-class manufacturing facility in Cudahy, WI. Send us your inquiry about custom precision bearings and we’ll be in touch within 24 hours.

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