Torque Value

showcrop · Mar 20, 2019

For an M10 going into Aluminum if that makes a difference, it seems that it should. The screw head has none of the standard metric class markings but there is a 96, with the two figures touching.

Steve@Advance · Mar 20, 2019

A lot of variables, unknown factors...

I looked at some charts and calculators. Not knowing the bolt grade, I'm assuming soft just to be on the safe side.

Not knowing the alloy of the aluminum...

Not knowing the depth of the thread...

To be on the safe side, I'm coming up with 18-24 ft lbs.

But... Use your own judgment.

Was this disassembled for another reason, or did the fastener fail, strip?

Bob Harvey · Mar 20, 2019

With most 'unknowns', especially aluminum (or as the Brits say 'alyouminium'), I tend towards tight, wait a bit then tight. It is all in the feel. Aluminum is not all that fragile, and if you have the right fastener it should be self evident. Torque tables are available for all metals. HTH

showcrop · Mar 20, 2019

(quoted from post at 17:05:31 03/20/19) A lot of variables, unknown factors...

I looked at some charts and calculators. Not knowing the bolt grade, I'm assuming soft just to be on the safe side.

Not knowing the alloy of the aluminum...

Not knowing the depth of the thread...

To be on the safe side, I'm coming up with 18-24 ft lbs.

But... Use your own judgment.

Was this disassembled for another reason, or did the fastener fail, strip?

Steve it is from the front cover of a 1967 Datsun transmission that I removed in order to replace the input shaft seal. The screws were not tight when I removed the cover. For one source I came up with about twelve but that doesn't seem possible. From another I came up with 33 but that was assuming a semi- hardened screw. 18 to is right in the range that I was being led to. Thanks.

showcrop · Mar 20, 2019

(quoted from post at 17:05:31 03/20/19) A lot of variables, unknown factors...

I looked at some charts and calculators. Not knowing the bolt grade, I'm assuming soft just to be on the safe side.

Not knowing the alloy of the aluminum...

Not knowing the depth of the thread...

To be on the safe side, I'm coming up with 18-24 ft lbs.

But... Use your own judgment.

Was this disassembled for another reason, or did the fastener fail, strip?

Steve it is from the front cover of a 1967 Datsun transmission that I removed in order to replace the input shaft seal. The screws were not tight when I removed the cover. For one source I came up with about twelve but that doesn't seem possible. From another I came up with 33 but that was assuming a semi- hardened screw. 18 to 24 is right in the range that I was being led to. Thanks.

Torque Value

showcrop

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Steve@Advance

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Bob Harvey

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showcrop

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showcrop

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