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Thread: Quick and dirty t slot cutter
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28th Dec 2020, 11:46 PM #1Golden Member
- Join Date
- Dec 2007
- Location
- Adelaide
- Posts
- 574
Quick and dirty t slot cutter
I needed a small cutter for a 0.3" wide x 0.04" deep T slot (approx 7.5mm x 1mm) for a friend's project, turned the blank from silver steel, cut 6 teeth in the mill with the blank set up in the rotary table. Next heat and quench and over to the T&C grinder, I started to set up but thought being so small there is not much metal being removed and only a 1 inch long cut with flood coolant the lack of clearance behind the cutting edge shouldn't cause problems. It went as planned, in fact I was surprised at how easy it was, material was 1020 steel - the actual cut only took a minute or so. My friend is now telling me the next part of his project calls for a 25deg dovetail cutter.
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29th Dec 2020, 09:43 AM #2Senior Member
- Join Date
- Nov 2019
- Location
- Brisbane
- Age
- 69
- Posts
- 452
Small cutter
Hello family guy. Small cutters are a pain with old eyes but a final grind makes the difference. I cut some large T slots in Rapid type B tool holders and had to stop part way thru for a regrind. The difference proves the point. I used the wheel OD and the drop method for clearance. Only 2-3 thou was removed and job done.
regards
BC
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29th Dec 2020, 12:34 PM #3Philomath in training
- Join Date
- Oct 2011
- Location
- Norwood-ish, Adelaide
- Age
- 59
- Posts
- 6,542
Nice job. Are we allowed to know what this is for?
Michael
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30th Dec 2020, 10:46 AM #4Golden Member
- Join Date
- Dec 2007
- Location
- Adelaide
- Posts
- 574
Even though mine are not too bad failing eye sight is a major PIA that only gets worse with age, I've done plenty of regular end mills on the T&C grinder but so far no experience with T slot or slit saws - probably part of the reason I skipped the grinding.
The part is I think part of a sliding joint for a miniature model steam hammer , it's quite a bit longer than it needs to be - the extra length is for gripping in the vice.
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