PM-25MV Collet options

[Jmanb13]

I just got my new PM-25MV setup yesterday and I need to get some tooling for it.

I currently have a set of ER32 collets that I use for my lathe and small work holding, so I considered getting an R8 to ER32 chuck. I know the R8 to ER32 chuck would limit my vertical space compared with just the R8 collets.

Since a value set of R8 collets is about the same cost as a R8 to to ER32 chuck, I figured I would just get the R8 set so that I have both options. Any reason not to go this route?

 

[T Bredehoft]

You'd loose the length of the chuck extension beyond the R8 mount, insignificant in most cases. You won't be using any collets larger than 3/4 in your mill, so there'll be no restriction there. As I understand it , the 32 collets go to 13/16. Sounds like a winner. I use the R8 collets, have plenty of Z space, though movement (distance) is limited to about 1 3/4 inches.

 

[Fabrickator]

I bought an ER 25 value set with an R8 adapter. I've used it a couple of times, but I use my collets more for my lathe and Rotary Table. Nice to have the choice though for very little money.

You want an R8 collet set for a mill. Nice to have both.

 

[wrmiller]

I used R8 collets in my PM25 for two reasons:

One, to keep the cutter as close to the spindle bearing as possible (less flex/chatter).

And two, I wanted to keep the head as low as possible on the column to keep the machine as stiff as it can be. The lower the head, the stiffer the machine.

 

[Jmanb13]

Thanks all. I went ahead and went with the R8 collets. More options is always good