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what size vice for mill

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not done it yet26/10/2020 11:52:08
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Posted by Emgee on 26/10/2020 11:19:58:

An ER25 chuck will hold up to 16mm shank cutters, the largest recommended for the machine, it will be lighter and smaller to allow access to more restricted areas that need machining.


ER collets will hold more than just end mills and are useful for both mill and lathe.. I have both ER32 and 16, but have just needed to buy an ER 40 for a job to avoid damaging the parts on a pump - like some muppet had done previously, when it has been taken apart.

JasonB26/10/2020 12:22:41
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Could you not have got an "oversize" ER 32 Collet as they can be had upto 1"

If you are on a limited budget and hope to get the most out of a single set of collets then ER32 is probably the best bet giving reasonable capacity for use on the lathe and collet blocks when used for work holding with the slight disadvantage of being a bit bulky when used with small cutters and/or on a small mill. If purely for cutter holding on a minimill then ER 16 or ER20 would do.

old mart26/10/2020 14:49:15
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The trouble with getting large er collet holders for a small mill is the cost of cutters over 16mm in diameter. The big ones are generally longer and take up valuble Z axis room. That is why I opted for er25 with a maximum of 16mm years ago and have never regretted it since. If a mounting plate for using the er collets on a lathe is also on the wish list, then the bigger the better, as then the collets will be also used for workholding. I hold 18 and 20mm cutters in R8 direct collets, and have 25mm indexible cutters with turned down shanks to fit in them also. Above that are 40, 50, 63 and 80mm shell mills. With your small machine, 40mm would be the largest the power could run.

not done it yet26/10/2020 18:07:11
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Could you not have got an "oversize" ER 32 Collet as they can be had upto 1"

Was that directed at me? If so, no - I needed a collet for something somewhat larger than 1”. I could have attacked the job in a different way, but the ER 40 will get used for other jobs.  It was simply an example to demonstrate that the maximum collet system purchased is not necessarily limited to the maximum end mill size quoted for the poster’s milling machine.

Edited By not done it yet on 26/10/2020 18:07:55

JasonB26/10/2020 18:19:12
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Yes I was enquiring of you NDIY, though with ER40 standard largest size being 26mm I could not see the reason to go larger unless you are using oversize ER40 collets.

not done it yet26/10/2020 22:18:24
5141 forum posts
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unless you are using oversize ER40 collets.

As above, I am.

Peter Etherington 229/10/2020 15:05:33
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The reason im going for the er32 collet chuck is that I want one for my lathe, so two for the price of one.

old mart29/10/2020 18:23:40
2219 forum posts
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It is useful to have the lathe option, I also have a lathe mount, but it was bought some years after choosing er 25. I found that the cheap sets of collets were a bit of a lottery regarding accuracy. I have some Cutwell and Vertex collets in the most used metric sizes for milling cutters, (6-8-10-12 and 16mm).

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