Best Type of Collet Closer for Accuracy used on 10EE

[Cory]

Hello,

What is the more accurate type 5C collet closer for a 10EE?
Sjogren?
Monarch Draw bar?
Monarch or another Lever closer?

If you were making a small run of parts which closer would be more accurate for cutting to a length? If you tighten the Sjogren and Draw bar different every time does that effect the part dimension? Does the lever hold a better tolerance because it draws to the same pressure every time? The carriage would be locked so it doesn't move as you make your facing cut. The collet would have a stop in it.

Thanks for the input.

 

[jbeech]

Royal is good.

 

[sneebot]

You can get dead-length 5C collets so that tightening on a Sjogren or handwheel is not part of your tolerance stack up. This would be the way to go if you were looking for tight length control.

With a standard collet your pull back will vary if you have any variation in clamp diameter.

 

[rklopp]

A collet chuck like a Sjogren that does not need a drawbar lets you put a hard stop in the spindle taper. That takes collet pull-back out of the equation at the expense of potentially marking parts as the collet pulls into the gripped position. I have a homemade hard stop with a Jarno taper for my 10EE. I also have an Aloris hard stop that expands further back in the spindle bore to lock in place. These work great.

 

[sneebot]

A collet chuck like a Sjogren that does not need a drawbar lets you put a hard stop in the spindle taper. That takes collet pull-back out of the equation at the expense of potentially marking parts as the collet pulls into the gripped position. I have a homemade hard stop with a Jarno taper for my 10EE. I also have an Aloris hard stop that expands further back in the spindle bore to lock in place. These work great.

I have some very small drill chucks on MT2 arbors. I've taken these and put them into the Jarno to MT2 adapter behind a Sjogren. Then it's possible to mount custom stops in the drill chuck. Somewhat limited on lengths. The expanding, in spindle, stops allow much longer parts.

 

[daryl bane]

Another vote for Sjogren. I have both in 5C and 2J. I have collet stops for both, but rarely use them.

 

[rimcanyon]

If you are not sold on 5C, consider 2J if your goal is accuracy. 5C collets are much wimpier than 2J, and are easily sprung, which affects accuracy and not in a good way.

The advantage of using a lever-action collet closer is that drawback is the same every time, so you can use collet stops that fit in the collet. Sjogren made a lever-action 2J collet closer, but they are as rare as hens teeth.