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Andy
¿ªÔÆÌåÓýHi 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 ? From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of John Lindo ? ? 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. ? John L Spain. ?
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