DennisCA
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This question was raised last night as I disassembled and cleaned a boring head that came with my milling machine:
Never heard of the brand Magnadyne by the way, can't even find any info on it. But it raises some questions, how is this supposed to work without a draw bar?
I also went and looked at other tooling I had that came with the machine (an unknown collet holder and an ER collet holder). I note they have got draw bars so they can be held tight against the taper... But shouldn't they have some kind of matching drive lug to the machine spindles? The machine spindle looks like this (not my machine, but same style):
There are cutouts on both sides, I would assume a drive lug of some kind is meant to mate with that, I don't think the friction generated by a SK-40 taper is enough on it's own? But the other tooling instead has matching cutouts, basically they're both female. Is friction alone enough to lock it? Or should there be some kind of drive lug that goes in between the spindle and tool holder?
Or are these cutout meant for something else, like a spanner / wrench to help tighten the draw bar?
Never heard of the brand Magnadyne by the way, can't even find any info on it. But it raises some questions, how is this supposed to work without a draw bar?
I also went and looked at other tooling I had that came with the machine (an unknown collet holder and an ER collet holder). I note they have got draw bars so they can be held tight against the taper... But shouldn't they have some kind of matching drive lug to the machine spindles? The machine spindle looks like this (not my machine, but same style):
There are cutouts on both sides, I would assume a drive lug of some kind is meant to mate with that, I don't think the friction generated by a SK-40 taper is enough on it's own? But the other tooling instead has matching cutouts, basically they're both female. Is friction alone enough to lock it? Or should there be some kind of drive lug that goes in between the spindle and tool holder?
Or are these cutout meant for something else, like a spanner / wrench to help tighten the draw bar?