ER-32 Collet Chuck Wanted for MicroMark 7X16 Mini Lathe

Ken from ontario said:
It would be a good idea to mark the holes/chuck so next time when you re install that chuck, it'll go in the same holes and will give you the same runout, I've done that to all my chucks.
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Devil,
Before you witness mark the chuck and the spindle, you might also try different hole-to-hole combinations to see if one of the three possiblities gives you less runout. It makes a difference for my collet chuck on my lathe.

Tom
 
Okay, I'll check that.

Here's a cheap set on Amazon that looks decent. Anyone have this set?
 
devils4ever said:
Okay, I'll check that.

Here's a cheap set on Amazon that looks decent. Anyone have this set?
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That is the same eBay seller I linked, I have one of their set and as I mentioned the collets are acceptable for work holding but I'd use the Techniks for tool holding on my mill. I just wished I had ordered the set with the most collets(by 1/32" not 1/16"), and metric/inch so it would cover all the in-between sizes.
Most of what I know about good collets and what to look for came from a very reliable source(Mikey) so I would check with him and follow his advice.
 
devils4ever said:
Okay, I'll check that.

Here's a cheap set on Amazon that looks decent. Anyone have this set?
Click to expand...

I don't own that exact set but buying it on Amazon is a good idea because of their return policy. For the lathe, a set like you linked to is a good idea. It will allow you to grab whatever you want up to 3/4" OD. Again, save the Techniks collets for the mill.
 
Thanks, mikey.

Yes, this Amazon set looks good and is about half the price of the Techniks I bought. I'll use those on the mill and the Amazon set on the lathe. The 25 piece set goes to 13/16" which is good also. Runout is supposed to be 3 or 4 tenths.
 
So, my LMS chuck has no holes for tightening the collar. I can see this is needed. I can drill a hole on the perimeter, but is the steel hardened? What size? Depth? What goes in it? A straight rod? Or, a curved one like the one for the collar?
 
I made a wrench for this out of a 1/4”x1” piece of flat bar and a handle. My chuck has socket head cap screws inserted from the front holding it on, so the bar has a hole that fits over the head of a screw close to one side. The side of the bar wedges against the body of the chuck pretty nicely. Will take a picture once I get home.
 
devils4ever said:
So, my LMS chuck has no holes for tightening the collar. I can see this is needed. I can drill a hole on the perimeter, but is the steel hardened? What size? Depth? What goes in it? A straight rod? Or, a curved one like the one for the collar?
Click to expand...

My ER40 chuck has three equally spaced holes around the periphery of the chuck. They go in about 1/2" deep and I use a straight rod turned to fit the hole to hold the chuck steady as I tighten the ER nut.

Test your chuck with a file to see if it is hardened. I suspect it won't be and you can just drill it. If it is hardened then you would need to use a carbide die drill to make the hole(s).
 
The LMS chuck is not hardened. I drilled 3 3/8" holes in mine for Tommy bar use. You can just use a straight Tommy bar or a pin spanner if you choose.
ImageER32 Wrench small.jpg
Roy
 
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