Quantcast

Imperial R8 Collet sets

Help Support HMEM:

Kpar

Kpar
Joined
Dec 14, 2016
Messages
60
Reaction score
17
Location
GLADSTONE QLD Aust.
When I purchased my mill last year it came with all metric end mills & collets.
I now need to get some imperial R8 Collets. No problem getting imperial end mills locally but not the R8 Collets.
Can somebody suggest an Australian supplier.
Kpar
 

django

Active Member
Joined
Mar 8, 2009
Messages
42
Reaction score
1
You don't need to buy another set of collets because your metric set should cover all sizes through the range ie. 1-2mm, 2-3mm, 3-4mm, 4-5mm, etc, etc, up to whatever is your largest size is (mine is 20mm) therefor you have all imperial sizes up to 3/4" covered.
 

DJP

Well-Known Member
Joined
Dec 6, 2012
Messages
468
Reaction score
115
I'm not sure this is true as the collets need to be ER (Extended Range) to cover metric and imperial. R8 collets are size specific in my experience.

The good news is that R8 collets should be easily available on the used market as most guys switch to ER.
 

john_reese

Well-Known Member
Joined
Sep 9, 2016
Messages
141
Reaction score
29
I use an ER32 x R8 collet chuck most of the time. It covers both metric and imperial sizes within its capacity.
 

Kpar

Kpar
Joined
Dec 14, 2016
Messages
60
Reaction score
17
Location
GLADSTONE QLD Aust.
Thanks all I will follow up on suggestions. Yes I did find imperial will not fit R8 collets so maybe getting a set of ER's is an option.
Kpar
 

kvom

Well-Known Member
Staff member
Joined
Jun 4, 2008
Messages
3,205
Reaction score
602
Thanks all I will follow up on suggestions. Yes I did find imperial will not fit R8 collets so maybe getting a set of ER's is an option.
Kpar
Not sure what this means. My mill is R8 and I work with imperial stock all the time. These collets can hold several thou smaller, but should not be used with anything larger than the stated size.
 

ruzzie

Well-Known Member
Joined
Aug 28, 2008
Messages
145
Reaction score
37
Not sure what this means. My mill is R8 and I work with imperial stock all the time
You don't need to buy another set of collets because your metric set should cover all sizes through the range ie. 1-2mm, 2-3mm, 3-4mm, 4-5mm, etc, etc, up to whatever is your largest size is (mine is 20mm) therefor you have all imperial sizes up to 3/4" covered.
#3 got their ER & R8 mixed up
 

Blogwitch

Ex Bogstandard
HMEM Supporter
Joined
Dec 26, 2008
Messages
3,697
Reaction score
676
Location
Crewe, Cheshire, UK
Kpar,

Before you go searching out a set of ER collets.

I made the same mistake many years ago. I invariably now use metric and imperial spindle collets since then. ER's have a fatal flaw when used on fairly small milling machines, even though mine is a small Bridgy clone, you lose too much throat depth (around 2" to 3"), this can sometimes mean you just can't do the job as you can't regain that throat depth. Spindle collets allow the maximum you can get under the end of your spindle mounted cutter.

I found that the two sets of spindle collets (met & Imp) came to the same price as a good set of ER 32 ones.




Don't get me wrong, I still use the ER system (3 different size systems), but mainly on my lathe or table mounted tooling, but never for holding cutters in the mill.



John
 
Last edited:

DJP

Well-Known Member
Joined
Dec 6, 2012
Messages
468
Reaction score
115
Agreed that spindle collets save space but for my J Head mill an ER set would be nice for 90% of my needs. The R8 spindle collets force me to reach high to brake and release the collet and although the extra stretching exercise may seem like a bonus, it's not. I now have a small platform to make this task easier.

This is maybe getting off topic but the best solution would be an ER set plus a spindle set of collets in every dimension available.
 

bazmak

BAZMAK
HMEM Supporter
Joined
Dec 12, 2012
Messages
2,215
Reaction score
1,259
I have found that the R8/er32 collet set does everything i want
I also bought a few R8 collets that i use when i have height restrictions
 

Latest posts

Top