Some weeks ago I posted a question about how to fix a clamp that tends to loosen, and there were no clear answers but lots of inputs that I appreciated very much.
No wanting to take drastic measures as in pic one.
I had the idea of drilling a hole in the back of the lower jaw, tapped it and insert a bolt that would narrow the gap and provide an anchor point with the hope that it would work.
AND IT DOES!
Attachment 38441Attachment 38442Attachment 38443Attachment 38444Attachment 38445Attachment 38446
To test the hold, I clamped my bench and gave it a 100 yanks both from the handle and from the bar ( I do not know if that part of the clamp has a special name) and it held very well, so now I have clamp for another 20 years.Attachment 38447
BTW I forgot to mention that once in place and adjusted I fixed the bolt with loctite for threads to avoid it getting loose as well.