Andy I too am new
and have the same problem.
?
Mike
?
toggle quoted message
Show quoted text
?
Hi
All,
Would it be
possible for abbreviations to not be used? As this is a forum for old timers
and newbies, there are many of us who don¡¯t know what these abbreviations
stand for. It doesn¡¯t take more than a few seconds to type the full name, and
it would help greatly in understanding what you¡¯re talking
about.
Many
thanks,
Andy_b
Near
Southampton
England.
From:
7x12minilathe@... [mailto:7x12minilathe@...] On
Behalf Of John Best
Sent: 13 February 2013 13:02
To:
7x12minilathe@...
Subject: RE: [7x12minilathe] Re:
chatter
?
John,
Great advice,
but I offer a slight modification¡¡..?
Remove the
chuck and check the arbor runout on the internal taper.? I¡¯ve never been
happy with the chuck mounting on those three studs, as it gets a new TIR every
time you mount the chuck.?
If I remember
correctly, my 7x14 (from Micromark) gets better than 0.0005 TIR.? I¡¯ll
try to re-check it later today.
John
B
State
College, PA
?
Not
sure how much run time you have on your lathe.
Check the front spindle bearing
by placing a piece of board on the ways under the chuck
(protection)?
Put a piece of bar under the
chuck and with a dial indicator and the stylus sitting on the top of the
chuck,see how much lift you are getting.
you maybe using the deep groove
bearings as fitted standard to the lathe,maybe change to tapered roller
bearings.
At least you then can eliminate
on of the variables,also check the 4 bolts pulling down the headstock are
tight.
?
Is
the tool properly shaped for brass? Brass needs 0 top rake; if there's any
top rake the tool will try to pull into the work.
Roy
--- In
7x12minilathe@..., William McBride
wrote:
>
> thanks John,Roy,Michael, The tool is on center I use
a quick change tool post I am cutting 1" brass it is now chattering on all
cuts not only tapers even if I take off say .005 on a side as for rpm I
don't know I have no spindle tach. I tried speeding up the spindle got
worse.
> Bill
>
No virus found in this
message.
Checked by AVG -
Version: 2013.0.2897 / Virus
Database: 2639/6099 - Release Date: 02/12/13
