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#1 Bonnet balance link

Posted: Mon Mar 23, 2020 9:22 am
by peters3103
Hi gents,
I’ve removed my bonnet balance links for cad plating (now painted body colour). Will I need to fully disassemble them by removing the rivets? If so, how can I re-rivet them. I’ve never done it before

Cheers,
Pete

#2 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 2:12 pm
by lopena
Pete:

While there are dedicated tools to set rivets, the process can easily be achieved with the simplest of hand-tools (a hammer).

The toughest bit is to find the proper-sized solid steel rivets themselves...spend some time on the internet and you’ll find the proper size eventually (you may have to buy a dozen or two).

Once you have the proper size rivets get a propane torch and heat a rivet until it is orange-hot. Slip it into the hinge, put the hinge on an anvil with the rivet head facing down and give it a few almighty whacks with a ball-peen hammer to mushroom the rivet. Apply a touch of paint and job done.

Good luck,
Alan
N.J.

#3 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 3:56 pm
by tinworm
The difficult bit is not making it too tight !

Barrie

#4 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 6:53 pm
by lopena
Barrie is correct...do not mushroom the tip of the rivet too much. An over-tight rivet will prevent the hinge from operating. You’re not building a bridge...no need to totally flatten the rivet.

Alan
N.J.

#5 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 6:58 pm
by lopena
Another thread on this site specifies that the rivets should be 5/16” in diameter and should have a brass rivet on either side of the hinge.

Alan
N.J.

#6 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 8:53 pm
by bitsobrits
I think you mean a brass washer either side.

Shop for brass shim washers, as you will want them thin, like about .010"

#7 Re: Bonnet balance link

Posted: Mon Mar 23, 2020 11:43 pm
by peters3103
Ok, thanks all for your input.

#8 Re: Bonnet balance link

Posted: Tue Mar 24, 2020 4:21 am
by abowie
I usually don't bother when we zinc plate them.

If you do decide to disassemble them be careful not to lose the brass washers.

#9 Re: Bonnet balance link

Posted: Tue Mar 24, 2020 5:55 am
by peters3103
Thanks Andrew. If it’s an option to have them plated without removing the rivets then I’ll do that.

#10 Re: Bonnet balance link

Posted: Tue Mar 24, 2020 7:49 am
by abowie
Look on balance I think it's easier.

If you sandblast them well first and make sure they they are straight so that no large bits get missed they should look ok.

You may get a little rust leaking out from the rivet heads but pulling them apart and putting them back together is a pita. Just my 50c worth.

#11 Re: Bonnet balance link

Posted: Tue Mar 24, 2020 8:32 am
by peters3103
abowie wrote:
Tue Mar 24, 2020 7:49 am
Look on balance I think it's easier.

Nice pun Andrew! 😀
And yes I agree.