tension knob moving

[Woodrush]

I have an excelsior 21 and was wondering if anyone has found a solution to stop the rear tension knob from moving. I was told to tighten the nut underneath the knob, but it's so tight, I can't move it. If I don't keep an eye on it, it will move an inch by the time I'm done a couple of projects

Edited December 30, 2021 by Woodrush

[Woodrush]

Don't know why this posted twice. I don't see anywhere to delete one

[Norm Fengstad]

my Seyco had similar problem. I removed the tensioner bolt, then put a drop of blue loc-tite on the threads reinserted, proble solved

[Woodrush]

40 minutes ago, Norm Fengstad said:

my Seyco had similar problem. I removed the tensioner bolt, then put a drop of blue loc-tite on the threads reinserted, proble solved

Will that affect if I want to move it. I do sometimes to get a more aggressive cut

[OCtoolguy]

8 hours ago, Woodrush said:

I have an excelsior 21 and was wondering if anyone has found a solution to stop the rear tension knob from moving. I was told to tighten the nut underneath the knob, but it's so tight, I can't move it. If I don't keep an eye on it, it will move an inch by the time I'm done a couple of projects

I took a wide rubber band and wrapped it around the tension rod just under the knob. A couple of wraps and then stretch down to one of the bolts on the side of the saw. Just a way to keep it from turning on its own. Gerry rig but it works. 

[kmmcrafts]

8 hours ago, Woodrush said:

Will that affect if I want to move it. I do sometimes to get a more aggressive cut

Probably depends on how often you turn it as to how long it'll last. I did blue ( make sure to use the blue otherwise you may never turn it again ) loc-tite a couple years ago and have turn it a handful of times over the couple years. I'm now just starting to have a very slight movement on it's own again. Maybe about once a month I have to readjust it. I'll likely take it apart again this summer and add some more loc tite.. 

[Woodrush]

8 minutes ago, kmmcrafts said:

Probably depends on how often you turn it as to how long it'll last. I did blue ( make sure to use the blue otherwise you may never turn it again ) loc-tite a couple years ago and have turn it a handful of times over the couple years. I'm now just starting to have a very slight movement on it's own again. Maybe about once a month I have to readjust it. I'll likely take it apart again this summer and add some more loc tite.. 

I don't turn it that often so that is probably the only solution. 

[Wichman]

There is another solution, but I would only use it as a last resort. I have used this method myself but still:

Mark where the nut sits on the threaded rod. Using a small pair of vice grips, open the jaws until they do not contact the thread when closed. Slowly, about a quarter turn at a time tighten the jaws so that threads of the rod are just slightly crushed. The crushed threads will resist movement due to vibration.

I used this technique on a very small (2mm) machine screw that needed occasional adjustment (once a week to once a month, depending). This worked for 5+ years at which time I repeated the process. I was worried that even blue threadlock would be permanent. 

[Roberta Moreton]

I just keep an eye on it and adjust when needed. 

[FrankEV]

A piece of Blueu tape holds it in place on my Pegas.  Not pretty but works.

[xocd]

Would a jam nut under the tension knob and against the body of the saw work?

 

xocd

[Woodrush]

5 hours ago, xocd said:

Would a jam nut under the tension knob and against the body of the saw work?

 

xocd

That might work

[OCtoolguy]

I think Frank has the best answer. Blue tape strategically placed should do the trick.