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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.: ATW-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.
  • Keyslots are available. Units are supplied without keyslots. When a keylsot 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-AS81935/9, and are approved for procurement under this specification.
Unit of Measure

Specifications

Part Number

 N/A ATWK-8ET

SAE Part Number

N/A M81935/9-08K

Thread Type

 N/A Right Hand

Thread Configuration

 N/A Female

B - Ball Bore

 N/A .5000 in

W - Ball Width

 N/A .500 in

H - Head Width

 N/A .400 in

A - Base to Center

 N/A 2.356 in

D - Head Diameter

 N/A 1.459 in

O - Ball Shoulder Diameter

 N/A .600 in

S - Max. Housing I.D.

 N/A 1.0000 in

E - Diameter

 N/A .672 in

K - Boss Diameter

 N/A 1.020 in

J - Wrench Flat Width

N/A .875 in

F - Boss Height

 N/A .375 in

Ball Diameter

 N/A .781 in

P - Drilled Hole Depth

 N/A 1.375 in

C - Thread Depth [inch]

 N/A 1.250 in

Thread Size

 N/A 1/2-20

Thread Class

 N/A UNJF-3B

N - Keyway Height

 N/A .060 in

R - Keyway Radius

 N/A .083 in

a - Misalignment Angle

 N/A 8 º

Approximate Brg. Weight

N/A .305 lb

Ultimate Radial Static Load Capacity

 N/A 24,600 lb

Fatique Load

 N/A 5,700 lb

Axial Proof Load

 N/A 2,040 lb

No Load Rotational Breakaway Torque

 N/A 1 to 15 in·lb

Keyway

 N/A Keyway

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.
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