Somebody knows where I can find an operators manual

Can't help with the manual directly. But I do have access to an SV-50B with the MSC-518 control, and the documentation.

Ours is the CAT40 10K spindle. SV-50's were also available in a 50 taper 8K spindle. The "B" refers to extended X axis travels ( 40" or 1020mm ).

If you have a specific question, let me know.

Thanks, just I have to set up one machine and the last machine that I renenmber is 12 years old, so may be I have to ask you something.
Thanks again. Ninus

Also available
50T 10k rpm SV50B/50
40T 15K RPM SV50 SVT (die mold package)