Torque Settings

Information relating to the Matchless G9 or AJS Model 20 500cc twin
njhking
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Torque Settings

Post by njhking »

Where can I find information on torque settings? I have just changed the rear tyre on the bike and on tighting the rear wheel spindle nut - knowing I can be a bit heavy handed - thought it a good idea to find the correct torque setting. Can anyone advise what this setting should be for rear wheel spindle nut, but also is there a good reference book, webpage etc where I can obtain these in the future.
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1608
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Re: Torque Settings

Post by 1608 »

As far as I'm aware there are no torque settings for any of these models except the cylinder head bolts. For alloy twin heads 22lbs, but most now go for aprox 25lbs I believe.Most, if not all of the work can be carried out using small to medium sized ring and open ended spanners.
There will no doubt be other opinions along shortly
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clive
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Re: Torque Settings

Post by clive »

Medium spanner, hard as you can, rear wheel spindle nut torque setting! Most others, small spanner, except head bolts/nuts when its back to medium or if using sockets, 3/8 drive and short tommy bar.
clive
if it ain't broke don't fix
Andy G
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Re: Torque Settings

Post by Andy G »

Here's a conversion chart, if someone can answer your wheel question you could calibrate your hands accordingly:

Finger tight: 0.5 ftlbs
Nip: 5
Pinch: 15
Firm: 25
Grunt: 35
Two Grunt: 45

Anything above two grunts you need to use the agricultural range.

;)
Bombling contentedly around rural Aberdeenshire
njhking
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Re: Torque Settings

Post by njhking »

I've gone with a Firm setting as usual I would end up with Two Grunts, which seems too much.
Greybeard
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Re: Torque Settings

Post by Greybeard »

Whereabouts does 'FT' fit into that scale, Andy?

Steve
bitza
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Re: Torque Settings

Post by bitza »

And if you need length of pipe on the spanner to release the nut I think f me that was f----- g tight.
Is the exclamation springs to mind.
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Re: Torque Settings

Post by mdt-son »

Andy G wrote:Here's a conversion chart, <....>

Finger tight: 0.5 ftlbs
Nip: 5
Pinch: 15
Firm: 25
Grunt: 35
Two Grunt: 45
Torque figures always need to be accompanied by information how these values were obtained, particularly if threads were dry or lubricated.

A wheel spindle will be subjected to shear force and bending loads only. Axial loads at canting will be transferred onto the swing arm by spacers.
Hence the spindle should be preloaded only to the extent the gap between the swing arm and the adjacent spacer is zero.
A high preload is harmful to the spindle as fatigue is accelerated greatly.

-Knut
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clive
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Re: Torque Settings

Post by clive »

Do you mean don't do it up too tight Knut? :rofl:
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Mick D
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Re: Torque Settings

Post by Mick D »

Hi Knut

I get what you're saying, but the main purpose of the torque, (tension), on the spindle is to resist movement in the fork of the frame / swinging arm induced under acceleration and braking and hence needs to be several 'tads' above just taking up any clearance ;)

Regards Mick
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