MadModder
Gallery, Projects and General => How to's => Topic started by: John Rudd on March 19, 2024, 10:47:38 AM
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I need to machine a circlip groove in a 3mm silver steel shaft for some circlips.
Circlips themselves are 0.6-0.7mm thick and are 2.3mm.
So to the collective, I put it to you, what’s the best way to tackle this?
I tried an abrasive disc ( my fav method.) in my Dremellookalike but the end brg is knackered so it wobbles like a jelly….I tried Stew Harts method using a slit saw….hmmmm some erroneous noises made me abandon that idea…
Silver steel doesn’t machine like EN1a sadly….so open to suggestions please….
What works for you?
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Grinding bits of Eclipse hacksaw blade, just below the teeth, if you have something that can hold it like a parting blade. Otherwise sacrifice a small HSS drill bit in some metal stock you can hold in a toolpost. Your dodgy Dremel can part profile it, do you have diamond stones for finishing ? Keep stick out to a minimum unless you have a pile of small drills to use.
Oh !!! Is your silver steel part unhardened ?
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Steel is not hardened…
I’m thinking using a broken 1/8” centre drill suitably profiled to make the groove, sharpened on my t and c grinder..
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Sounds like a good approach to getting it sorted.
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Just wish the silver steel wasn’t so hard!
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I found a used carbide grooving insert 0.75mm by my measurement. Might have one good edge, or would sharpen on a diamond lap.
Ph Horn 312.0070.15 1N32
Pm your address and I'll pop in the post
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Bill,
That’s a great gesture….I’ll bear it in mind. Does it need a holder of some sort?
In the meantime, I’ll give some other ideas a go…
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Side on it's triangular with a hole in the middle.
Ideally it needs to sit in a V open at the bottom . It's not difficult to make if you have a mill.
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Nice insert Bill, that's given me ideas for my own tooling cut from hacksaw blade. Times like this I wish I had an EDM machine :thumbup:
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Used carbide drill bits with a 1/8" shank can be had off Ebay for less than a buck a piece. These can be used to make a variety of small tools, both external tools and internal.