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 - PH 13-8 Mo stainless steel per AMS 5629 - heat treated.
  • Ball - 440C stainless steel per AMS 5630 - heat treated.
  • Optional Ball - 13-8 Mo stainless steel per AMS 5629 - heat treated. (Specify by adding suffix "C" ex.: ATM-3ETC)
  • Race - 17-4 PH stainless steel per AMS 5643 - heat treated.
  • PTFE Liner - (AT 3200) Permanently bonded to race inside diameter, qualified to SAE-AS81820 Type A.
  • Temperature range: -65°F to +325°F
  • No load rotational breakaway torque can be varied to meet specific application requirements.
  • Keyways are available. Units are supplied without keyways. When a keyway is required, specify by adding suffix "K". Ex.: ATMK-3T.
  • As applicable, keyways will conform to SAE-AS81935/3 or NAS 559.
  • All threads are rolled after heat treatment, and conform to UNJF-3A per AS8879.
  • Rod End Bearings listed are manufactured to conform to the dimensions, materials, and configurations of SAE-AS81935/8, and are approved for procurement under this specification.
ASM-T & ASB-T Image
Unit of Measure
Items ASM-T & ASB-T Image
ATM-3ET
Aurora Bearing ATM-ET & ATB-ET Male Rod Ends SAE Series AS8135/8 (Right Hand) & AS81935/8 (Left Hand) 		ASM-T & ASB-T Image
ATM-3ETC
Aurora Bearing ATM-ET & ATB-ET Male Rod Ends SAE Series AS8135/8 (Right Hand) & AS81935/8 (Left Hand) 		ASM-T & ASB-T Image
ATB-3ET
Aurora Bearing ATM-ET & ATB-ET Male Rod Ends SAE Series AS8135/8 (Right Hand) & AS81935/8 (Left Hand) 		ASM-T & ASB-T Image
ATB-3ETC
Aurora Bearing ATM-ET & ATB-ET Male Rod Ends SAE Series AS8135/8 (Right Hand) & AS81935/8 (Left Hand) 		ASM-T & ASB-T Image
ATMK-3ET
Aurora Bearing ATM-ET & ATB-ET Male Rod Ends SAE Series AS8135/8 (Right Hand) & AS81935/8 (Left Hand)
SAE Part Number N/A M81935/8-03 N/A M81935/8-03C N/A M81935/8-03L N/A M81935/8-03CL N/A M81935/8-03K
Thread Type N/A Right Hand N/A Right Hand N/A Left Hand N/A Left Hand N/A Right Hand
Thread Configuration N/A Male
B - Ball Bore N/A .1900 in N/A .1900 in N/A .1900 in N/A .1900 in N/A .1900 in
W - Ball Width N/A .281 in N/A .281 in N/A .281 in N/A .281 in N/A .281 in
H - Head Width N/A .228 in N/A .228 in N/A .228 in N/A .228 in N/A .228 in
A - Base to Center N/A 1.315 in N/A 1.315 in N/A 1.315 in N/A 1.315 in N/A 1.315 in
D - Head Diameter N/A .680 in N/A .680 in N/A .680 in N/A .680 in N/A .680 in
O - Ball Shoulder Diameter N/A .293 in N/A .293 in N/A .293 in N/A .293 in N/A .293 in
S - Max. Housing I.D. N/A .5625 in N/A .5625 in N/A .5625 in N/A .5625 in N/A .5625 in
Ball Diameter N/A .406 in N/A .406 in N/A .406 in N/A .406 in N/A .406 in
G - Base to Center of Keyway Radius N/A N/A N/A N/A N/A .896 in
K - Keyway Width N/A N/A N/A N/A N/A .062 in
P - Keyway Depth N/A N/A N/A N/A N/A .207 in
C - Thread Length N/A .775 in N/A .775 in N/A .775 in N/A .775 in N/A .775 in
Thread Size N/A 1/4-28
Thread Class N/A UNJF-3A N/A UNJF-3A N/A UNJF-3A-LH N/A UNJF-3A-LH N/A UNJF-3A
a - Misalignment Angle N/A 10 º N/A 10 º N/A 10 º N/A 10 º N/A 10 º
Approximate Brg. Weight N/A .045 lb N/A .045 lb N/A .045 lb N/A .045 lb N/A .045 lb
Ultimate Radial Static Load Capacity N/A 3,000 lb
Fatique Load N/A 1,100 lb N/A 1,100 lb N/A 1,100 lb N/A 1,100 lb N/A 1,100 lb
Axial Proof Load N/A 150 lb N/A 150 lb N/A 150 lb N/A 150 lb N/A 150 lb
No Load Rotational Breakaway Torque N/A .5 to 6 in·lb N/A .5 to 6 in·lb N/A .5 to 6 in·lb N/A .5 to 6 in·lb N/A .5 to 6 in·lb
Keyway N/A N/A N/A N/A N/A Keyway