Axel nut tourque

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Medoro
Posts: 9
Joined: Tue Jul 22, 2014 12:09 am

Axel nut tourque

Postby Medoro » Mon Mar 12, 2018 7:09 pm

I very much doubt if this is a "new" topic but, I could not find the info I needed by any combo of words on the search page.
So could someone give me a safe value on the front and rear axle nuts on a 66 Monza ?
I know every body starts to laugh when we speak of torque values and our older bikes but, I would like to try and do this
the right way and not screw it up!
Any other proven assembly values are also most welcome.
Many thanks in advance.
Cheers,
Mike

Jordan
Posts: 1380
Joined: Fri Dec 24, 2010 11:29 am

Re: Axel nut tourque

Postby Jordan » Tue Mar 13, 2018 10:02 am

A common method is to keep tightening until the thread just starts to strip, then back off a little.

graeme
Posts: 938
Joined: Sun Mar 25, 2012 12:00 am
Location: Tasmania Australia

Re: Axel nut tourque

Postby graeme » Tue Mar 13, 2018 10:54 am

:o then it would be loose ????
And the thread would be stuffed ?

ducwiz
Posts: 604
Joined: Tue May 22, 2012 12:52 pm
Location: near Frankfurt, Germany

Re: Axel nut tourque

Postby ducwiz » Tue Mar 13, 2018 11:52 am

Some helpful links:

http://www.online-iso-calculator.com/online-bolt-torque-calculator-metric-vdi-2330/index.php?thread_standard_value=M16X1.5&standard_head_option=1&iso_head_organization=2&iso_head_value=18&strength_class_value=6.8&dkm_value=20.1&coefficient_value=0.14&select_friction_option=S&metal_coating_value=9&lubrication_value=0&yield_value=75&recommended_torque_80_value=190.4

https://www.norbar.com/en-gb/Home/Torque-Tension-Calculator

Results depend on the friction coefficients at the thread and under the head of the nut, which is uncertain. Additionally, the grade of the steel that axle and/or nut are made of is unknown, which gives more uncertainty. I presume a not too high grade for the axle, like ISO 5.8 or 6.8, the nut might have higher grade (8.8), and might carry a corresponding marking. However, the softer of both parts limits the permissible torque. I tightened the axle nuts of my 350D (M16x1.5) to 12-15 Nm.

cheers Hans

Medoro
Posts: 9
Joined: Tue Jul 22, 2014 12:09 am

Re: Axel nut tourque

Postby Medoro » Tue Mar 13, 2018 5:51 pm

ducwiz wrote:Some helpful links:

http://www.online-iso-calculator.com/online-bolt-torque-calculator-metric-vdi-2330/index.php?thread_standard_value=M16X1.5&standard_head_option=1&iso_head_organization=2&iso_head_value=18&strength_class_value=6.8&dkm_value=20.1&coefficient_value=0.14&select_friction_option=S&metal_coating_value=9&lubrication_value=0&yield_value=75&recommended_torque_80_value=190.4

https://www.norbar.com/en-gb/Home/Torque-Tension-Calculator

Results depend on the friction coefficients at the thread and under the head of the nut, which is uncertain. Additionally, the grade of the steel that axle and/or nut are made of is unknown, which gives more uncertainty. I presume a not too high grade for the axle, like ISO 5.8 or 6.8, the nut might have higher grade (8.8), and might carry a corresponding marking. However, the softer of both parts limits the permissible torque. I tightened the axle nuts of my 350D (M16x1.5) to 12-15 Nm.

cheers Hans

Thank you Hans. That's what I was looking for.

Jordan
Posts: 1380
Joined: Fri Dec 24, 2010 11:29 am

Re: Axel nut tourque

Postby Jordan » Tue Mar 13, 2018 8:06 pm

Oh, it'll stuff it alright, but it's still a common practice.
(It's not a serious suggestion.)

graeme wrote::o then it would be loose ????
And the thread would be stuffed ?


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