Cutting Gear Question

[will.mcray]

When cutting a 15 tooth pinion gear with an involuted cutter on a Bridgeport milling machine, how many passes is recommended for 4140 hardened material? Looking for your experiences and recommendations.


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[will.mcray]

I should add the DOC is .1541.


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[coffmajt]

when you say hardened do you know how much? Your gear cutter will not like anything much harder than Rockwell 40 C, Is there any way you could anneal and then reharden after machining? == Jack

 

[will.mcray]

I think it 28-32 RC.


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[benmychree]

It could be done in one cut, 4140 HT is not difficult to cut at its normal hardness as stated above, you just have to use an appropriate cutting speed, I'm thinking about 60 FPM, using coolant would be a good thing.

 

[will.mcray]

Thanks everyone. I am getting ready to begin the task.


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[NCjeeper]

Good luck. I always enjoy gear cutting. Especially when they come out right.

 

[will.mcray]

Finished cutting the gear at whole depth of cut with no problems, single pass

. This was fun project. Thanks everyone for you help.


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[brino]

Well done.
Great pictures!

Thanks for sharing them.

-brino

 

[Ulma Doctor]

Nice save will!!!