Gear Puller Heat Treatment Specify?
Gear Puller Heat Treatment Specify?
(OP)
Hello...I need to specify the heat treatment, hardness, peening, etc of a basic three prong gear puller with 6 inch 'arms'....I have searched this site and the web and have not found much info. The design will go thru destructive testing, but I am trying to establish an engr. baseline. Several industrial strength pullers appear to have the surface peened. I do not have any good vendors in the area to discuss the project...any thoughts would be much appreciated.





RE: Gear Puller Heat Treatment Specify?
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RE: Gear Puller Heat Treatment Specify?
Please provide material type and I'm sure someone can help with heat treating ideas.
RE: Gear Puller Heat Treatment Specify?
The part is specialized therefore low quantity. The material type is 4140...the part will not be cast or forged. I am familiar with a heat treatment of a puller, involving high temperature then lye salt to temper or harden, but not sure if sufficient....investigating cyrogenics also. Design life 5000 pulls. Need the long jaws to prevent twisting. In summary, need a baseline heat treatment for specification....so far, 4140, Rc45, else???
RE: Gear Puller Heat Treatment Specify?
You should be able to get Rc45 easily with a quench in oil and a temper - the time and temp will depend on your part geometry. It shouldn't require much of a temper though. This should be a very straight forward solution.
RE: Gear Puller Heat Treatment Specify?
RE: Gear Puller Heat Treatment Specify?
I would not want to use 4140 above 38 HRc in an application where it will be exposed to high service stresses. Keeping it below 36 would be even better.
If you need the high hardness for the strength, you are going to need a material with high toughness, too. Maybe a 4330V or perhaps a maraging steel.