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| keyways. |
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| Jasonb:
You can do it in the lathe. Use a boring bar that takes a HSS toolbit and grind that so it looks like a parting tool but mount it so the cutting edge is vertical not horizontal. You then just wind the carrage along and plane a small amount off,withdraw add a tho or two cut and repeat until you are at the required depth. If its aluminium it will be quite easy going, I have done upto 3/16" wide in steel but that takes some effort. As your hole is quite small it may just be easier to hold a bit of 3mm square toolsteel in the toolpost and run that in as above, bit like this |
| Lew_Merrick_PE:
My "solution" is simple. I go to one (of the five) machine shops within 10 miles of my shop with a box of doughnuts and a gallon of juice (and a $10 bill) an politely ask them to "slide in" my keyseat part when next they set-up for broaching keyseats. The longest "turn-around" has been a week-and-a-half as they were going into "summer shut-down" the next (it was a Friday) week. All bribes are to be paid in Coin of the Realm. The only problem is determining which Realm and what Coin. |
| inthesticks:
Jasonb that is an excellent solution and true to the classic home machinist theory that a good lathe in the absence of other machine tools and with a little bit of creativity can do any procedure required by the home machinist. Cheers CB |
| drmico60:
Wheeltapper, It is easy to make a simple tool that can cut keyways in small diameter holes,see: http://mikesworkshop.weebly.com/small-hole-slotting-tool.html Mike |
| krv3000:
hi I have dun in the past watt has just bin told make a tool up that looks like a parting off blade and fit it in to the tool post and just for thows that don't no the rule of thumb the slot shod be divided by two so if you is say is you sing 10mm key way steel then the slot in the shaft will be 5 mm deep and the one in the pulley will be 5 mm deep and for a bit of fun you shod you all ways youse key way steel for key ways |
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