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Effective August 21st, 2023, the Naval Air Warfare Center Aircraft Division (NAWCAD) has disapproved Timken Aurora’s qualification status for SAE-AS81820 and SAE-AS81935 specifications. Timken Aurora is working diligently to get requalified.

  • Body - 4340 steel - heat treated - protective coated for corrosion resistance.
  • Ball - Alloy steel - heat treated - hard chrome plated. Manufacturers option: 440C stainless steel - heat treated.
  • Race - 17-4 PH Stainless steel  - heat treated.
  • PTFE liner - (AT3200) Permanently bonded to race inside diameter. Qualified to SAE-AS81820 Type A.
Unit of Measure

Key Dimensions

Part Number

 N/A PRM-12T

Thread Type

 N/A Right Hand

Thread Configuration

 N/A Male

B - Ball Bore

 N/A .7500 in

W - Ball Width

 N/A .875 in

H - Head Width

 N/A .640 in

A - Base to Center

 N/A 2.875 in

D - Head Diameter

 N/A 1.775 in

Ball Diameter

 N/A 1.250 in

C - Thread Length

 N/A 1.687 in

Thread Size

 N/A 3/4-16

Thread Class

 N/A UNJF-3A

a - Misalignment Angle

 N/A 13 º

Ultimate Radial Static Load Capacity

 N/A 34,319 lbs

No Load Rotational Breakaway Torque

 N/A 1 to 15 in·lb

Approximate Brg. Weight

N/A .64 lb

Note

 N/A For dimensional tolerances of listed features, see the PDF version of the catalog under the "View Product Catalogs" tab from the home page.