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Getting a Grip on Four-Jaw Lathe Chucks

Now form the inside
Cut away of round bowl
Enlarge Image
 
Dovetail jaws contracting around a
spigot:
When forming a spigot
at the bottom of a bowl, match the
angle of the outside edge of the spigot
to the angle of the jaws.
Cut away of round bowl with longer ends
Enlarge Image
 
Dovetail jaws expanding into a
recess:
When forming a recess
in the bottom of a bowl, match the
angle of the inside rim of the recess
to the angle of the jaws.

Now form the inside

With the outside of the bowl complete, remove it from the screw center, and remove the screw center from the chuck. To hollow the inside of the bowl, remount it as shown. When turning the inside, take care not to catch the tool. Chucks do not hold turning stock as securely as a standard faceplate where several screws secure the blank. A bad catch can dislodge the bowl from the chuck. Once the final inside shape and wall thickness of the bowl have been achieved, sand it and apply the finish. For a bowl gripped in a recess, simply remove it from the chuck.


Continued on page 8:  Back to the bottom

 

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Comments (4)
8168762574
rwm50 wrote:

myplace i have the same unit, you need a 1" + 10 tpi thread type chuck

4/3/2013 05:31:05 PM Report Abuse
christopher_sta wrote:

I have a 4 Jaw chuck ordered at Busy Bee Tools for my Craftsman lathe. 3/4 X 16 TPI tread pattern.

11/27/2011 10:09:28 AM Report Abuse
mcplace wrote:

I need a 4jaw chuck for a Sears Craftsman wood lathe model# 351.217150 where can I find one. Sears says this model is obsolete any brand might as lon as the thread pattern match.Can some one help

4/23/2011 12:50:03 PM Report Abuse
helmich1 wrote:

Very informative! Metalworking 4 jaw chucks work differently, but that is another ballgame.

3/24/2011 10:38:22 AM Report Abuse

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