Modifying a Machinist Vise Handle

[Woodworker]

I want to modify a vise handle to fit a vise of mine that was missing its handle. But my idea isn't working out because the vise handle I purchased on the auction site arrived and it appears to be hardened. A file skates off of it. It looks like it was cast of iron, but it sure doesn't want to be drilled. Could it be case hardened? Could I anneal it? I don't have any carbide drills or mills. Would they even work if I bought one? As usual for me what I thought would be a simple project is not turning out that way. Thanks

 

[benmychree]

Yes, you should be able to at least partially anneal it, just heat it up to (nearly ) red heat and let it cool slowly in still air.

 

[gheumann]

I've solved this problem in the past by using a carbide end mill instead of a drill - at least to get the hole started. A good reason to buy your first carbide end mill!

 

[Chipper5783]

Could you post a picture? Show us what it is you are trying to do. What resources do you have to work with (torch, oven, lathe, mill, . . . )?

 

[Woodworker]

I have a mill.
I have an old vise that has a 1/2" hex shaft, but it came with no handle. I bought a handle on the auction site that has a 1/2" hole (because that's all that I found, and the price was right). I have purchased a round ( 3/4" in. diameter) insert that has a 1/2" hex hole in it. So my plan is to drill, or mill, a 3/4" hole through the head of the handle ( where the square hole is now) and press/Loctite the insert in there.
This would be simple, but I didn't expect the handle (which looks like cast iron) to be hard. I can (and do) use just a socket wrench on the vise now, and I could keep on doing that, but there was something nagging at me that said I should find an "authentic" old vise handle. So this simple thing has taken on a life of its own......
Based on the above, when I get to this, I am going to heat it up and let it cool slowly, then try and use a carbide 3/4" end mill to plunge straight down.

I am sorry, but I am traveling over this weekend and picture won't be possible until next week.

 

[Aukai]

It's surprising what some of these metals do to throw you a curve. I use a 3/8" cordless impact for moving the jaws, and just a couple of taps to tighten. Keep the screw well oiled, and clean.