The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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.
PRM-T & PRB-T Image
Unit of Measure
1 

Part Number

Thread Type

B - Ball Bore

W - Ball Width

H - Head Width

A - Base to Center

D - Head Diameter

C - Thread Length

Thread Size

Ultimate Radial Static Load Capacity

CAD

PRM-5T N/A Right Hand N/A .3125 in N/A .437 in N/A .327 in N/A 1.875 in N/A .900 in N/A 1.187 in N/A 5/16-24 N/A 8,330 lbs N/A
PRB-5T N/A Left Hand N/A .3125 in N/A .437 in N/A .327 in N/A 1.875 in N/A .900 in N/A 1.187 in N/A 5/16-24 N/A 8,330 lbs N/A
PRM-6T N/A Right Hand N/A .3750 in N/A .500 in N/A .416 in N/A 1.938 in N/A 1.025 in N/A 1.187 in N/A 3/8-24 N/A 10,946 lbs N/A
PRB-6T N/A Left Hand N/A .3750 in N/A .500 in N/A .416 in N/A 1.938 in N/A 1.025 in N/A 1.187 in N/A 3/8-24 N/A 10,946 lbs N/A
PRM-7T N/A Right Hand N/A .4375 in N/A .562 in N/A .452 in N/A 2.125 in N/A 1.150 in N/A 1.281 in N/A 7/16-20 N/A 14,049 lbs N/A
PRB-7T N/A Left Hand N/A .4375 in N/A .562 in N/A .452 in N/A 2.125 in N/A 1.150 in N/A 1.281 in N/A 7/16-20 N/A 14,049 lbs N/A
PRM-8T N/A Right Hand N/A .5000 in N/A .625 in N/A .515 in N/A 2.438 in N/A 1.337 in N/A 1.468 in N/A 1/2-20 N/A 23,310 lbs N/A
PRB-8T N/A Left Hand N/A .5000 in N/A .625 in N/A .515 in N/A 2.438 in N/A 1.337 in N/A 1.468 in N/A 1/2-20 N/A 23,310 lbs N/A
PRM-10T N/A Right Hand N/A .6250 in N/A .750 in N/A .577 in N/A 2.625 in N/A 1.525 in N/A 1.562 in N/A 5/8-18 N/A 25,909 lbs N/A
PRB-10T N/A Left Hand N/A .6250 in N/A .750 in N/A .577 in N/A 2.625 in N/A 1.525 in N/A 1.562 in N/A 5/8-18 N/A 25,909 lbs N/A
PRM-12T N/A Right Hand N/A .7500 in N/A .875 in N/A .640 in N/A 2.875 in N/A 1.775 in N/A 1.687 in N/A 3/4-16 N/A 34,319 lbs N/A
PRB-12T N/A Left Hand N/A .7500 in N/A .875 in N/A .640 in N/A 2.875 in N/A 1.775 in N/A 1.687 in N/A 3/4-16 N/A 34,319 lbs N/A
Unit of Measure
1