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7x10, 7x12, 7x14 Mini-Lathe Information
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This is fast becoming
one of the more interesting areas of machining for me. When you first get
started, chucking a workpiece in a vise is all it takes to machine your part.
However, when you start getting into machining via CNC, it gets a bit more
complicated (and more interesting)...
We've broken this
section down further to include the following:
- Basic workholding (vises, blocks, clamps)
- CNC workholding (special jigs, fixtures, etc.)
- ER Collets (save your Z-axis travel)
- Mitee-Bite clamps (this company has some
interesting clamping methods)
- Phase 2 Quick Change Tool Post (QCTP) (this is
- Rotary Tables (make your mill function
like a lathe and more)
|did someone mention mitee-bite clamps?
|here's a pack of 10 of their cam action fixture
these are 3/8"x16tpi which offers
more than double the holding force than the 5/16"x18tpi ones (which the clamp block is tapped
|this is the back of the package. they're spec'd at
how much? expensive at over $6
|here's one set. it's basically a brass/bronze hex
washer and a socket head cap screw with an offset head.
the hex washer can be made from hex stock and a 3-jaw
chuck in your lathe.
|here's a top view of the socket head cap screw. note
the cam/offset/oblong head. if you have a 4-jaw independent chuck in your
lathe you can do the same with a similar bolt.
it may be more work than it's worth..
they also have ones that mount to t-slot nuts, but
they're even more expensive. so with these basic clamps. you can just buy
the cheap t-slot nuts at ~$1.00 at enco for your table and use these with
them if need be.
the other type of clamp is the toe-type which
exert force downward as well. but at ~$50 per clamp, it's quite
cost prohibitive for the small shop. we may just make these ourselves..
the real key to all of this is having some cam-action mechanism.
still, good workholding fixtures, clamps, jigs,
etc. is like having a set of sharp drill bits. makes all the difference!
here's another clamp base being made for use with these clamps.
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