Chuck question

It's because of the way the "scroll" works. The jaws have to be inserted in sequence to line up properly

-- Jack Novak Buffalo, NY - USA (Remove "SPAM" from email address to reply)

Jack your answer may have inadvertantly confused the OP.

The slides that are part of the chuck body have to go into the scroll in a certain order so that the scroll pulls them in or pushes them out concentrically.

The accessory jaws that screw mount onto the slides are also numbered because they're machined as an assembled unit to ensure their circular accuracy.

With Vicmarc's, the accessory jaws only need to be kept in numerical order with respect to the jaw set and don't need to be mounted to the matching number slide.

An email reply on this from Vicmarc, August '01:

_____ American Association of Woodturners Cascade Woodturners Assoc., Portland, Oregon Northwest Woodturners, Tigard, Oregon _____

The Oneway chuck jaws have a pin in one or two that ride in a slot to prevent you from travelling out too far and thus disengaging the the jaws. Once disengaged, you have to follow the incorrectly outlined procedure in the manual to reinsert them. The procedure in the Oneway scroll chuck manual has you installing the jaws in the incorrect order. It took me a few tries before I figured this out. What a PIA!

Ms Leslie

I wonder if clockwise order still rules for the Vicmarc since they changed the scroll to tighten by turning the key clockwise & the backing jaws are ordered counter-clockwise. I've been using ccw for the accessory jaws as well since I got the chuck early this year.

_____

prevent you from travelling out too far<

The slots are not the same length either and there's a reason. Could be that the people who find a gap between their consecutive jaw sizes have the pin in the wrong slot.

Stephen

Nope. The short slot is there to use if you want to prevent the jaw slides from protruding from the chuck body (safety issue for schools, etc.). The long slot gives you the max extension. Also, with the Stronghold or Talon, the jaw sets can go on in any order...as long as the "pinned" jaw is in one of the slots.

Peter Teubel Milford, MA

My chuck is of the newer (c.2001) CW=tighten configuration. I would think the proper way for your set would be CW, but if it works for you then why not continue. Here's most of a posting I made to the group earlier this year (4/27/03) on Vicmarc's changeover and conversion of older chucks:

_____ American Association of Woodturners Cascade Woodturners Assoc., Portland, Oregon Northwest Woodturners, Tigard, Oregon _____

To tell the truth it doesn't seem to matter. I just flipped the 1 & 3 jaws to make them run CW & there wasn't any difference. The backing jaws are really the ones that must be placed correctly.

Dennis

When jaws are machined to a chuck, they are not numbered at all. When the machining is completed, the jaws are then numbered to corresponde to the already assigned chuck numbers so that when reinstalling the jaws, they are put into place where they were machined to perfect concentricity. To replace the jaws randomly would cause a definate out of round condition.

STEMO

Thanks for the replys. It is one of those thinks that you normally don't think of useing them all the time.