Bonnet hinge upgrade

[dar...@siepka.me.uk]

Just wanted to share a modification i made to the bonnet hinges on the 2+2. Mine were damaged and coming away from the main moulding, the holes had enlarged too.
I made a grp block using two layers of 450gsm then 6 layers of 2mm core mat, then two further layers of 450gsm, i a shape i had made a card template of.
I did this on a bit of lightly waxed melamine with a plasticine ring around it to keep the resin contained.
Once set i machined for a 10mm ball race(26mm od x 8mm wide).a stainless steel double seal version was used.
This block was the glassed in place back onto the bonnet.
Now with the bolts tight it pivots smoothly on the bearing! No more grinding!

[Darren Siepka]

Here are a few pictures

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[Jim Hearne]

I did something similar on mine except the bearing is about 40mm of PTFE with a flange on the end.

The shaft is stainless and held into the subframe with a set screw so it can only rotate in the bearing.

 

I think the trouble with a lot of 2+2 bonnets is that people put the pivot bolts in from the subframe and let the bonnet pivot on the bolt threads.

 

Jim

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[Robert Craig]

Good idea. May be a few orders from others for these. 

Bob

Sent from my iPad

On 15 May 2020, at 14:59, Darren Siepka <dar...@siepka.me.uk> wrote:



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<IMG_20200515_080638206.jpg>

<IMG_20200514_152022384.jpg>

[Darren Siepka]

Yes that is what had been done on this bonnet , both bolts were seized in the subframe and the threads had ruined the bonnet holes! 

The accident damage had ripped the brackets away from the bonnet itself.

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[Darren Siepka]

This was the blocks during moulding