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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 alloy steel per AMS 6415 - heat treated - cadmium plated.
  • 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.: ATW-3TC)
  • 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.
  • Keyslots are available. Units are supplied without keyslots. When a keyslot is required, specify by adding suffix "K". Ex.: ATWK-3T.
  • As applicable, keyslots will conform to SAE-AS81935/3 or NAS 559.
  • Rod End Bearings listed are manufactured to conform to the dimensions, materials, and configurations of SAE-AS81935/5, and are approved for procurement under this specification.
Unit of Measure

Key Dimensions

Part Number

 N/A ATW-4T

SAE Part Number

N/A M81935/5-04

Thread Type

 N/A Right Hand

Thread Configuration

 N/A Female

B - Ball Bore

 N/A .2500 in

W - Ball Width

 N/A .343 in

H - Head Width

 N/A .260 in

A - Base to Center

 N/A 1.338 in

D - Head Diameter

 N/A .827 in

O - Ball Shoulder Diameter

 N/A .364 in

S - Max. Housing I.D.

 N/A .6562 in

E - Diameter

 N/A .329 in

K - Boss Diameter

 N/A .430 in

J - Wrench Flat Width

N/A .375 in

F - Boss Height

 N/A .188 in

Ball Diameter

 N/A .500 in

P - Drilled Hole Depth

 N/A .750 in

C - Thread Depth [inch]

 N/A .625 in

Thread Size

 N/A 1/4-28

Thread Class

 N/A UNJF-3B

a - Misalignment Angle

 N/A 10 º

Approximate Brg. Weight

N/A .06 lb

Ultimate Radial Static Load Capacity

 N/A 5,500 lb

Fatique Load

 N/A 1,300 lb

Axial Proof Load

 N/A 430 lb

No Load Rotational Breakaway Torque

 N/A .5 to 6 in·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.