Precision Chrome and Stainless Steel Thrust Ball Bearings

We can provide you with the leading ball bearing information

Precision Chrome and Stainless Steel Thrust Ball Bearings

We can provide you with the leading ball bearing information

Thrust Ball Bearings
Precision Thrust Ball Bearings

Thrust ball bearings consist of two precision chrome steel washers (rings) and a ball complement spaced by a retainer. They are supplied with ball grooves in the rings for increased capacity. Thrust ball bearings are used under purely axial loads or in situations where the thrust load is beyond what a precision ball bearing can handle.   The rolling elements are balls which allow for the lowest friction possible with bearings – point contact rolling element bearings. These Thrust ball bearings are made in 52100 or equivalent carbon steel hardened to Rockwell 58 C minimum for optimum fatigue life and load ratings, but they can be special ordered in stainless steel material.  Stainless Steel thrust bearings would be better suited in medical, laboratory, and other applications where humidity or other similar elements may be present.

Precision Thrust Ball Bearings

Product ID (d) OD (D) Width (W) Dynamic Load (lb)
3.0000 8.0000 3.5000 130 View
4.0000 9.0000 4.0000 160 View
4.0000 10.0000 4.0000 125 View
5.0000 12.0000 4.0000 140 View
6.0000 12.0000 4.5000 270 View
6.0000 14.0000 5.0000 280 View
7.0000 17.0000 6.0000 410 View
8.0000 16.0000 5.0000 600 View
8.0000 19.0000 7.0000 740 View
9.0000 17.0000 5.0000 570 View
9.0000 20.0000 7.0000 520 View
10.0000 18.0000 5.5000 552 View

units in millimeters.

Precision Stainless Steel Thrust Ball Bearings

Product ID (d) OD (D) Width (W) Dynamic Load (lb)
3.0000 8.0000 3.5000 401 View
4.0000 9.0000 4.0000 212 View
4.0000 10.0000 4.0000 208 View
5.0000 12.0000 4.0000 237 View
6.0000 12.0000 4.5000 410 View
6.0000 14.0000 5.0000 484 View
7.0000 17.0000 6.0000 903 View
8.0000 16.0000 5.0000 882 View
9.0000 17.0000 5.0000 860 View
9.0000 20.0000 7.0000 939 View
10.0000 18.0000 5.5000 555 View

units in millimeters.

**Assumes adequate high speed oil or grease; and Dynamic Capacity (Ca)/applied axial load (Ca/Pa >= 12) is equal to or greater than 12
Thrust ball bearings are separable.
Also available in stainless.  Minimum order quantities apply.
Shaft & Housing Tolerances:

  • Nominal Shaft Diameter: Min: +0.000; Max: -0.009
  • Nominal Housing Diameter: Max: +0.0051; Min: -0.000
Backup Shoulder Diameters:

  • Sufficient surface area is required to provide full support of the bearing rolling elements.
  • The minimum shaft and maximum housing shoulder diameters are as follows:
    • Shaft Shoulder Diameter Minimum = (Bearing ID (d1) + Bearing OD (D2))/2
    • Housing Shoulder Diameter Maximum = (Bearing OD (D2) + Bearing ID (d1))/2
Bearing O.D. Radial Runout: 8 µm
Bearing Race Groove to Bore (d1) Radial Runout: 6 µm maximum
Bearing Race Groove to Backface Axial Runout: 10 µm maximum
Lubrication:

  • The bearings must be lubricated either with oil or grease to perform satisfactorily and achieve it’s rated dynamic capacity.
  • It is the end user’s responsibility to provide for a final lubrication system.
  • For a nominal fee, apt bearing will lubricate the thrust bearing with an oil or grease selected by the end user.
  • Individual and special packaging is available upon request.
Bearing Preload: The larger of the two values from the equations below should be used as the minimum axial load to prevent ball sliding at relatively high speeds:

  • Fa min = (Coa/100) x (n/N max)2
  • Fa min = Coa/1000

where

Fa min: Minimum axial load (kgf)
n: Speed (rpm)
Coa: Basic Static Load Rating (kgf)
N max: Limiting speed (oil lubrication) (rpm)
Bearing Life Calculations:
Ln Life = (A1 x A2 x …) x (Ca/T)3 x 10A1, A2, … Adjustment Factors:
  • Material
  • Lubrication
  • Temperature
  • Cleanliness/sealing
  • Mounting
  • Environment
  • Reliability

Ca = Dynamic Capacity Rating
T = Applied Equivalent Dynamic Thrust Load