Menu
Find Your Nearest Timken Sales Office or Authorized Distributor

Our locator tool helps you connect with the right Timken partner quickly. Registered users
can save their nearest Timken Sales office or distributor in their dashboard.

Try the Locator Tool
Analyze Bearing Performance in an Application with Timken ® Syber ® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

Learn More
Explore Timken Engineering Tools
Videos on YouTube

Check out our Engineering Tools video playlist on YouTube. These short walkthroughs
help you navigate Timken calculation tools, selection guides and digital resources.

View the Full Playlist
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
Request Information Add to CAD Cart

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.
By clicking Submit, you consent to the personal information you provide being used in the manner as described in our Privacy Notice, including access to that information by Timken personnel who may be located outside your home country. In addition, you agree that the CAD drawings are for your personal, one-time use only, and that you will not modify or create any compilation or derivative work using the CAD drawings or distribute or display the CAD drawings on any website or other media.