The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: BSAA10 on 28.07. 2016 09:02
-
Hello. On the end of my left hand fork there is a pinch bolt. I note that where the fork is split where the spindle goes through one portion is threaded the other is not. Which way does the pinch bolt go in? Threaded part first and the nut tightens the fork on the spindle or threaded part last and the bolt thread pulls the fork tight on the spindle? Excuse my ignorance, I hope I have explained this ok.
-
Have attached a photo of a front wheel, not mine, to show how the bolt is fitted. Hope this helps.
Russ
-
The spindle is fitted first. Just in case you are unaware the spindle is a left hand thread. Once you have tightened the spindle you then insert the pinch bolt which is a normal right hand thread. Do not over tighten the pinch bolt you need just enough torque to make the clamp grip. The BSA front wheel refitting instructions also say this: “It is most important that after the spindle has been tightened but before tightening the pinch bolt, the forks are bounced once or twice to enable the left hand fork end to position itself on the spindle shank. If this precaution is not observed, the left fork leg may be clamped out of alignment, and consequently the forks will have little or no movement.” So, the sequence is: fit spindle, bounce the forks a couple of times, then tighten the pinch bolt. I hope that helps.
John
-
Pinchbolt enter direction = through the plain section first then thread it into the threaded section and nip the bolt up, then screw on and tighten up the nut to lock.
-
Thank you all