Needs Pictures: 0
Results 16 to 19 of 19
-
22nd May 2020, 11:29 AM #16Golden Member
- Join Date
- Apr 2018
- Location
- Drouin Vic
- Posts
- 634
There seems to be a little confusion here- seems to me the OP is turning toward the chuck whereas a few replies seem to assume he is turning away from the chuck?
I would suggest that the part is walking out of the chuck under the lateral pressure of the relatively heavy cut, muck like a long part supported in a fixed steady will walk out of the chuck if the steady is not properly aligned. Perhaps your old 3-jaw chuck is not able to provide a good enough grip for heavy cuts.
-
22nd May 2020, 11:43 AM #17Diamond Member
- Join Date
- Aug 2019
- Location
- Revesby - Sydney Australia
- Age
- 57
- Posts
- 1,196
Correct, my deep cuts were TOWARD the chuck. I try to only do light cuts in the other direction, to be kind to the spindle lock nut+clamp.
The chuck is a 4" Pratt, but has had a bad life serving school students.
I have been tempted to buy another one – maybe a 6jaw?
...but now a larger lathe has appeared, no need once its brake is repaired.
-
22nd May 2020, 01:01 PM #18Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
I agree with oxx/steve, the chuck jaws are bellmouthed.
Lighty tighten à length of stock and push and pull the end of it and you see that the outer ends of the jaws are not gripping
-
22nd May 2020, 05:35 PM #19
Hi Guys,
Probably not applicable here, but I've seen carbide insert holders that have been rubbed on the front face because the tool has been set slightly high.
One thing that did surprise me a little was to discover that the jaws on my four jaw chuck are tapered towards the back. If they all had the same taper I wouldn't have been as surprised, but they all vary. Pictures in my "Brooks Grinder" thread in projects.Best Regards:
Baron J.
Similar Threads
-
Milling work needed on a piece of PFC
By SurfinNev in forum METALWORK GENERALReplies: 3Last Post: 1st Dec 2019, 08:11 PM -
RFQ: Lathe Work And Mill Work
By twistedfuse in forum METALWORK GENERALReplies: 4Last Post: 18th Jan 2012, 04:23 PM -
Can I get Custom Lathe Work Done?
By mattaus in forum METALWORK GENERALReplies: 21Last Post: 25th Aug 2011, 01:55 PM -
Interesting piece of maching work
By Woodlee in forum METALWORK GENERALReplies: 1Last Post: 19th Mar 2009, 10:17 AM -
Asking for someone to produce a piece of work - acceptable?
By Manaz in forum FORUMS INFO, HELP, DISCUSSION & FEEDBACKReplies: 3Last Post: 7th Oct 2007, 06:48 PM