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  #1  
Old 22/04/2016, 07:42 PM
kayjay283 kayjay283 is offline
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Default Griffin bolts and threads

Griffon Bolts & Threads - does anyone have a list of bolt sizes and threads for a QUB? My knowledge is all of metric threads and I'm struggling to identify many of the bolts and small screws on my Griffon. Thanks

Last edited by kayjay283; 22/04/2016 at 07:43 PM. Reason: Instant notification
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  #2  
Old 22/04/2016, 09:27 PM
Phil Hyde's Avatar
Phil Hyde Phil Hyde is offline
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Cool Griffin threads

Not an expert but here are a few to start.

Rear sprocket fasteners UNF. As are brake spindles and axles.

General cycle fasteners unified, fine and coarse.

Get a good thread pitch gauge and a Zeus chart.

Good luck.
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Old 23/04/2016, 12:46 PM
Brian Catt Brian Catt is offline
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Default

Having a somewhat similar problem on axle bearings on our Railway bogies! The bearings are grub-screw fixed to the end of the axles with rather small and fine-pitched grub screws which we always assumed were of common thread....until we started measuring with pitch gauges!
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Old 21/04/2017, 07:57 AM
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webby16 webby16 is offline
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Default Griffon carburetor stud threads

Hi all, wondering what thread is on the stud where it going tints the cylinder for the carburetor please?
I've got to get them out at some point but if someone on here knows I can order bolts for a mk2 spigot today.
Thanks David
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Old 21/04/2017, 09:13 PM
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Phil Hyde Phil Hyde is offline
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Default Griffin thread thread

General engineering practice suggests the use of a coarse thread in aluminium. So, more likely to be UNC. On a carburetter stud it is likely that you would find a fine thread on the carb. end.
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Old 23/04/2017, 08:49 AM
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webby16 webby16 is offline
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Default Griffon carburetor stud threads

Thanks for the reply Phil,
I assumed unc also but took the studs out and measuredo the thread it's 5/16 bsf.
David
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