Material for Bearing Driver

[franklineng]

I need to make a custom bushing driver. I am considering using ASTM 4140 material? Any other material I should be considering? Should it be hardened and too what degree?

Thanks for your help

 

[TVP]

What is the function of a custom bushing driver?

 

[swall]

Will this driver be a one time use tool, or one that will see frequent usage?

 

[franklineng]

The function of the driver is to install a bushing into the arm of steer knuckle at the proper depth with out distorting the bushing. It is not a one time tool, but daily usage.

 

[redpicker]

Why not try 4140 Q&T to 30/36 HRC (commerical heat treat)? If it wears out too quickly, try a tool steel.

rp

 

[CoryPad]

redpicker's advice is appropriate.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[DDRSS10]

Using annealed S7 would probably work as well. It would work harden on the contact surfaces quite quickly and would be less prone to craking/shattering caused by pressing on hardened steel.

Nick

"Speed costs money boys, how fast do you want to go?"

 

[NickE]

I wouldnt use annealed tool steel. The tool steels are properly used at a Q&T condition.

30/36HRc is relatively tough and has a tensile strength ~150ksi. There should be no problem with cracking or shattering.

If the tool shows deformation after 1-2 uses you could try a tool steel. Since you are not hammering the bearing in you could use a common steel like O1. (Q&T to 45-50HRc giving ~231ksi strength)



Nick
I love materials science!