By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

What collet chuck dimentions for s Sieg SX2?

All Topics | Latest Posts

Search for:  in Thread Title in  
Ketan Swali21/11/2020 15:06:56
1384 forum posts
119 photos
Posted by PETER ROACH on 21/11/2020 11:01:01:


seig do a large range, dealers don’t stock the entire range, but only a small offering. See or **LINK**

if you want a specific machine, find a good import agent and buy what you really want, rather than second best, cause the dealer has it. But echo as above , think before you hit the credit card.



Hi Peter,

Some clarification, and corrections are in order:

  • The SX2 or the SX2P are small mini-mills. It would be too costly for Martin to import by himself direct from China, even if SIEG were to supply him directly, probability of which are next to zero nowadays. He would be better off looking for supply of the machine from a reputable European dealer.
  • ARC introduced the X3* back in 2003, and promoted the SIEG brand, before SIEG understood the meaning of branding, and well before Axminster decided to to promote the SIEG brand. In the early 2000s, it was possibly for any individual to purchase directly from SIEG. Most such individuals saw the machine in our catalogue, as well as at the shows we attended, and then decided to buy direct. Originally, SIEG obliged, but as the dealer network grew, many dealers persuaded SIEG to re-consider their position on direct supply to individuals in areas where SIEG has dealers. In-turn, distributor loyalty with SIEG has grown to a certain extent.
  • Each dealer - distributor decides which machines they wish to sell, as well as the versions of the machine which they wish to sell - MT/R8. If the end user/buyer wishes to buy an alternative machine or alternative version, the dealer decides if they wish to supply the version the buyer wants. In most cases, SIEG will not interfere in this process.
  • ARC only sells models and versions of SIEG machines which it wants to sell. This is based on 18 years of ARCs sales and service experience in this industry. Requests for models and versions outside the range we sell are politely declined.
  • Earlier, with reference to collect chuck systems, you mentioned: 'they offered their own version of a collet system, which you have with 6,10,12 &16 mm collets.'. Yes they do. They look similar to ER collect systems, but are non-standard, with limited availability of collets, and generally expensive. In the early days we used to offer non-standard collet systems which were same as SIEG, but quickly dropped them after understanding limitations - especially for sales, and costs which are higher than ER. I believe that one or two competitors still sell the non-standard system.

* Although the X3 is still sold by SIEG in small numbers, it was discontinued by ARC in 2013, and replaced with SX3 - Brushless motor version.

It is important that Martin considers his direction based on current trends, and for this reason, the above clarification is made, without any disrespect to you Peter.

It would be better for Martin to consider Bazyls, Stuart Smith 5s, and Journeymans suggestions.

Ketan at ARC.

Edited By Ketan Swali on 21/11/2020 15:19:59

old mart21/11/2020 15:10:22
3398 forum posts
210 photos

I opted for er25, it goes up to 16mm. If you intend to use er collets on the lathe with a mounting plate as well as on the mill, then er32 would be a better choice for both machines to share.

Ketan Swali21/11/2020 15:17:56
1384 forum posts
119 photos


The SX2 spindle is usually MT3 or R8.

So, depending on which version you buy/get from, consider:

MT3 - ER25 chuck system or

R8 - ER25 chuck system

If you want to buy variable quality of such collet systems - consider the Banggood route. You will not get any links on here as this has been kept off discussion - read Code of Conduct link

Generally, for re-sell value, SX2s with R8 spindles are better, and also considered better for cnc conversions. To understand, read a book, or do some research.

Ketan at ARC.

martin olesen21/11/2020 15:49:59
10 forum posts

Hi Ketan,

Thank you for your very informative text.

I will for sure buy from the official Danish rep, Globaltools, their prices are ok, and then i have service and support close to.



Howard Lewis21/11/2020 21:44:09
5540 forum posts
13 photos

Martin explained the different taper systems quite clearly.

The Morse Tapers, (To add confusion, the taper angle varies very slightly from size to size. But that need not bother you since you will be interested in the one that fits the machine that you choose, if MT is your choice )

The R8 is a taper with a greater larger angle so will be easier to release. Morse tapers tend to be a little harder to release, being known as "Self Gripping" tapers. But both types will need to be pulled into the machine quill with a drawbar. For many years the standard drawbar thread was 3/8 BSW, but now M12 is more prevalent. They are not interchangeable.

If by some means you find that you have both varieties, you will need two drawbars to suit the fitting that you have

Understandably, you have decided to buy from your local dealer, so check the specifications that they offer. Your choice may be made for you, if only one is available from Global.

Good luck, and many hours of enjoyable machining..

As you see, advice will always be available on the Forum.


Zan21/11/2020 23:33:16
293 forum posts
19 photos

For my sx2 p cnc conversion I used the R8 spindle this was used with a 3/4 collet and the cutters are mounted in 3/4” silver steel chullets. They are very very carefully clocked in the 4 jaw then drilled, bored and reamed for the cutters held in place with 2x2 ba grubs. Height location is with a 5/32 silver steel bar registering against a machined ring ( in situ) on the end of the spindle. Photo 2, offsets are set off machine in a dedicated setting device seen in photo 1 . It’s highly accurate and the silver steel cost little from a specialist supplier near Harrogate

The advantage of this system is it is ridiculously cheap and has a very very small extension unlike many er chucks , and as Ketamine says, the sx2 is a mini mill and thus the more we can help it the better

The height is set with the dti device in photo 3 it has a length of 115 mm when the clock reads zero when in contact with the work



 Sorry about the aspect ratio!
once the cutters are fixed in their holders the size is recorded from the setting jig in the Mach 3 tool table, and in addition into Fusion 360 which I ciponstantly use for 3D cad and cam code production.

The machine is very well used.   Pm me for more info

Edited By Zan on 21/11/2020 23:34:13

Edited By Zan on 21/11/2020 23:38:57

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Eccentric July 5 2018
walker midge
rapid Direct
JD Metals
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest