What kind of collet chuck is it and what are these collets?

[Tom Kitta]

That is well used 1/2 collet i.e. the hole is 1/2 for size. No idea what is the collet type...

Bottom has 4 bolts but they are thread on.

74a collets? Just a junk stuff now? One is a "push type" https://www.toolholdershop.com/coll...QhhtlxFJgWxom1GMYlJz_PIr-iMQuppPW4NHo9mRHU0AM



No idea what it is - looks like a toy version of the NMTB40 horizontal spindle.

I have more collets tomorrow.

 

[Bandit]

There were a few smaller spindle sizes, that are not in use any more, not even listed in Machinists Handbook. The 30 is still in use, but appears 35 is not common, though I did find a few tool makers will make up one on special order. There is a fellow with a web site that has a nice listing of spindle and collet sizes and some measurements, he is also puzzled by some of the different ones he has found. Can’t remember the site name.

 

[Tom Kitta]

The last collet system is for a wood shaper - https://www.theindustrialdepot.com/...BlJ06nTbtigUTU0ZP9JpoRQmVssWnNyzq1laBiTQyDJA8

 

[Bandit]

Somewhat looks like one for a Delta Shaper. I have been reworking a spindle that a friend brought for a delta Shaper, had to turn down the shank on it and shorten just over 2 inches. It was all he could find on Amazon for Delta. It holds er20 collets. With 1/2 and 1/4 inch collets he can use regular router bits in it. Still have to make a new draw bar yet.

 

[Martin w]

Somewhat looks like one for a Delta Shaper. I have been reworking a spindle that a friend brought for a delta Shaper, had to turn down the shank on it and shorten just over 2 inches. It was all he could find on Amazon for Delta. It holds er20 collets. With 1/2 and 1/4 inch collets he can use regular router bits in it. Still have to make a new draw bar yet.

I had the same one on a Wadkin Bursgreen shaper. Never used it. Always sat in the drawer. You couldn’t get enough rpm to run router bits efficiently.

 

[MashingMetal]

I happened to have both. The wood shaper spindle is on the left and the 30 Taper collet for my Harrison milling machine on the right.

 

[Bandit]

@MashingMetal, how fast did that shaper turn? This one is a 2 speed, seems to be 8000 and 10000 rpm, it does not appear to use large diameter bits, less then 3 inch?
How fast does your turn @Martin w ?

 

[MashingMetal]

@Bandit
My big one maxes out at 10,000. Which is about the minimum for a router collet. I also have the Wadkin BRS like Martin had, that is a 2 speed, I know it’s slower, have to find the manual.

 

[Martin w]

10,000 rpm would probably be fine. I think the old Wadkin only turned about 4500 rpm. Great for a 6” shaper cutter. Not so much for a 1/2” router bit.