Thread: TOS 100mm chuck information required

Nev ,

I reckon you need a part number - http://www.tos.cz/tospdf/iug.pdf Have a look at the TOS site, there are a few chuck types - ...::: TOS Svitavy, a.s. :::...

Bob.

Look up this TOS brochure:


http://www.peko-trade.com/tos/toskatalog.pdf


On page 4 you find the runouts for the two qualities made by TOS, "standard = DIN6386-I" and "superior = extra".


Further down in the brochure you find the various types of chucks made by tos, along with pics and the part numbers for both standard and superior quality execution. Hopefully you can match a number on your chuck with these part numbers to find an answer to your question. Chris


PS: a typical TOS chuck description looks like this:

IUS 200 / 3 - 1 - M1 243801 203110


IUS is the chuck type
200 is the diameter in mm
3 number of jaws
1 accuracy class, 1 = extra, 2= standard
243... is the order number

And therefore, your chuck is of the accuracy class 1

Thanks guys. I think I have narrowed it down to this one -

Kovonastroje - Universal chuck IUS TOS 100/3-1 M1

The M1 and M2 had me confused for a while. This referes to the register on the back and the PCD as far as I can see. This one has the correct dimensions for the one I have. Also was not sure which part refered to the accuracy.

Nev

The colour of the Tos logo insert will give you a clue, standard chucks are blue, precision chucks have a gold logo.

Regards,

Chas

Originally Posted by Chas

The colour of the Tos logo insert will give you a clue, standard chucks are blue, precision chucks have a gold logo.

Regards,

Chas

That's an interesting bit of info. Lucky me, I have the gold. Never used this chuck so it's either sell it, or get a lathe worthy of putting it on I guess. I've actually had this for about 25 years packed away in grease in a plastic container.

Nev

G'Day Nev,
Rather than sell it, another option is to fit it with an arbor to use as a tailstock chuck.
Regards,
Martin