Are you speaking of the old model 30 handpiece? If so, just
how did you go about machining the jaws?
Yep, its the old # 30, I used a diamond file and ran the speed
low not to buzz off too much metal. I kept doing a visual check
to make sure the three sides of the jaws were coming in evenly
and spinning once in a while to make sure it was centered and
running true. I found that after working it a bit the jaws would
loosen so you need to keep them tight. Also, I tried not to get
the right angle seat too low, 2.5 mm is enough. You can always
trim a little from the top when you get the ledge cut true and
centered. When you put your tubing on the seat, press down on
the top of the tube while you tighten so it sets level or you’ll
get a wobble that makes for uneven pressure when you set.
What kind and heat range of solder do you use when you're
able to solder next to c.z. w/o disaster?
I fire coat with boric/alcohol and try not to put any direct
flame on the stone and get in and out fast. I use 14M plumb
solder and let it set on the carbon block for a minute to cool
Good Luck Steve,