Axel nut tourque
Posted: Mon Mar 12, 2018 7:09 pm
by Medoro
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
Re: Axel nut tourque
Posted: Tue Mar 13, 2018 10:02 am
by Jordan
A common method is to keep tightening until the thread just starts to strip, then back off a little.
Re: Axel nut tourque
Posted: Tue Mar 13, 2018 10:54 am
by graeme

then it would be loose ????
And the thread would be stuffed ?
Re: Axel nut tourque
Posted: Tue Mar 13, 2018 11:52 am
by ducwiz
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=190.4https://www.norbar.com/en-gb/Home/Torque-Tension-CalculatorResults 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
Re: Axel nut tourque
Posted: Tue Mar 13, 2018 5:51 pm
by Medoro
Thank you Hans. That's what I was looking for.
Re: Axel nut tourque
Posted: Tue Mar 13, 2018 8:06 pm
by Jordan
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 ?