On Wednesday, June 13, 2012 07:48:35 PM andy pugh did opine: > On 13 June 2012 18:47, Przemek Klosowski <[email protected]> wrote: > > You need to 'get a quote' so I called and talked to a rep, and > > felt that they are not a small/hobbyist customer oriented. > > You can buy balls crews from Amazon: > http://www.amazon.com/THK-Steel-Precision-Assembly-BNK-0801/dp/B006P583Q > W/ref=sr_1_3?ie=UTF8&qid=1339611871&sr=8-3&keywords=8mm+ballscrew
Remind me to bring pot holders. > But > not cheaply compared with, for example: > http://www.zappautomation.co.uk/r08025rswp0-ballnut-p-142.html?cPath=1_5 > 9_66_189 But both are 16mm, too big for this. > > Another useful information was that there are three manufacturing > > classes, in order of increasing accuracy and price. Standard rolled > > thread is accurate to 0.004in/ft; precision rolled good to 0.001/ft, > > and ground thread better than 0.5mil/ft > > And I have argued several times that we are almost always going to be > happy with the inaccurate stuff. Especially over the length of a lathe > cross-slide. (and where you are probably touching off anyway, so only > really care that 50 thou is very nearly exactly 50 thou. I concur 100%. Thanks Andy Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Peace was the way. -- Kirk, "The City on the Edge of Forever", stardate unknown ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
