What collet chuck dimentions for s Sieg SX2?

[Howard LewisParticipant @howardlewis46836]

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.

Howard

[ZanParticipant @zan]

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 2×2 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

23

 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

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