pitch of m8 bolts.

DSN_KLR650
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John Biccum
Posts: 542
Joined: Tue May 20, 2003 4:21 am

pitch of m8 bolts.

Post by John Biccum » Tue May 31, 2011 9:28 pm

I probably should have added that a LONG TIME has passed since I earned my living in a machine shop.J I had this metric thread pitch *wrong*, Jeff Saline and even my trusty thread pitch gage have confirmed that one of the first things to go when you get older is the memory. Metric pitch the larger the pitch number the COARSER the thread. Sorry for the senior moment-induced confusion. From: DSN_KLR650@yahoogroups.com [mailto:DSN_KLR650@yahoogroups.com] On Behalf Of John Biccum Sent: Tuesday, May 31, 2011 6:51 PM To: DSN_KLR650@yahoogroups.com Subject: FW: [DSN_KLR650] Re: Pitch of M8 bolts. The 1.0 and 1.25 refer to how many millimeters the bolt moves with one full (360 degree) rotation. So a 1.0 pitch "threads in" one millimeter and a 1.25 pitch "threads in" 1.25 millimeters with one full rotation. Therefore the 1.25 pitch is FINER than a 1.0 pitch ( but COARSER than a 1.5 pitch bolt). This is different than the inch system where the pitch describes the number of turns in one inch of bolt travel. The more turns the finer the pitch, e.g a 24 pitch is very fine, a 20 pitch somewhat coarser etc. But in both metric and inch pitches the greater the pitch *number*, the finer the thread. I was unwilling to specify the pitch on the M8 bolts on the KLR as I suspect that more than one pitch is used, depending on the application. So I'd have asked Georgios to tell us *what* M8 threads he had stripped out and then I could tell him the correct pitch. Also if the answer is "the footpeg bolts" , a better recommendation is not a STI (a Standard Threaded Insert, e.g a Helicoil or Time-Sert) but rather to drill out the stripped threads and re-tap for a bigger (and consequently stronger) M10. (I spent 20+ years doing in QC in machine shops so just *might* have this thread pitch knowledge committed to memory J) From: DSN_KLR650@yahoogroups.com [mailto:DSN_KLR650@yahoogroups.com ] On Behalf Of mechanizeinc Sent: Tuesday, May 31, 2011 7:08 AM To: DSN_KLR650@yahoogroups.com Subject: [DSN_KLR650] Re: Pitch of M8 bolts. The courser thread: 8 x 1.25 Mech --- In DSN_KLR650@yahoogroups.com , "georgios_ace" wrote:
> > Hello, > > I am thinking of buying the 'Wurt' 'TIME-SERT' thread repairing system. > http://www.timesert.co.uk/time-sert.php > In order to get the proper set I need to know which pitch of the M8 bolts
Kawasaki uses on the KLR: M8x1,25 or M8x1?
> > friendly > > Georgios >
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