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SORN
by OldSkrote - 31/07/25 02:07 PM
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Forums34
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Aug 24th, 2023
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Joined: Dec 2011
Posts: 374
Learner Plates Off!
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Learner Plates Off!
Joined: Dec 2011
Posts: 374 |
In order to apply the right press force, it is better to apply a dedicated rotation angle from the contact than a torque. The major part of the applied torque is absorbed by the friction (Kellerman & Klein formula) which depends on surface roughness and lubrification.
The angle method avoids to take into account the friction. This method is generaly used for example to tighten the cylinder head.
At the moment the garage is very cold and I don't have the exact measures of thread pitch,screw diameter,length and I/O diameters of the hub, but a rough estimate of the tightening angle could be around 30° to 40°.
Next time I will fit a Wheel, I have to note the screwing angle.
Have you some datas? If somebody uses the oldtimertools with a torque wrench, it could be useful to know the torque and the related angle.
Regards
2005 PLUS 4
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Joined: Dec 2011
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
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In order to apply the right press force, it is better to apply a dedicated rotation angle from the contact than a torque. The major part of the applied torque is absorbed by the friction (Kellerman & Klein formula) which depends on surface roughness and lubrification.
The angle method avoids to take into account the friction. This method is generaly used for example to tighten the cylinder head.
At the moment the garage is very cold and I don't have the exact measures of thread pitch,screw diameter,length and I/O diameters of the hub, but a rough estimate of the tightening angle could be around 30° to 40°.
Next time I will fit a Wheel, I have to note the screwing angle.
Have you some datas? If somebody uses the oldtimertools with a torque wrench, it could be useful to know the torque and the related angle. "Bill The correct way to tighten a nut is to measure the length of the bolt and stretch it the correct about. This is how we did large bolts ( above 2” ) Engineering would give the amount the stretch would be" I discussed this with My friend, a Canadian Machinist - retired. Just to add a little wood to the fire.
Button
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Joined: May 2014
Posts: 2,774
Talk Morgan Expert
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Talk Morgan Expert
Joined: May 2014
Posts: 2,774 |
In order to apply the right press force, it is better to apply a dedicated rotation angle from the contact than a torque. The major part of the applied torque is absorbed by the friction (Kellerman & Klein formula) which depends on surface roughness and lubrification.
The angle method avoids to take into account the friction. This method is generaly used for example to tighten the cylinder head.
At the moment the garage is very cold and I don't have the exact measures of thread pitch,screw diameter,length and I/O diameters of the hub, but a rough estimate of the tightening angle could be around 30° to 40°.
Next time I will fit a Wheel, I have to note the screwing angle.
Have you some datas? If somebody uses the oldtimertools with a torque wrench, it could be useful to know the torque and the related angle. Bloody Nora! Just whack the thing with a big copper or lead mallet a couple of times. Job done.
Steve
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Joined: Dec 2011
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
In order to apply the right press force, it is better to apply a dedicated rotation angle from the contact than a torque. The major part of the applied torque is absorbed by the friction (Kellerman & Klein formula) which depends on surface roughness and lubrification.
The angle method avoids to take into account the friction. This method is generaly used for example to tighten the cylinder head.
At the moment the garage is very cold and I don't have the exact measures of thread pitch,screw diameter,length and I/O diameters of the hub, but a rough estimate of the tightening angle could be around 30° to 40°.
Next time I will fit a Wheel, I have to note the screwing angle.
Have you some datas? If somebody uses the oldtimertools with a torque wrench, it could be useful to know the torque and the related angle. Bloody Nora! Just whack the thing with a big copper or lead mallet a couple of times. Job done. +1
Button
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Joined: Apr 2008
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Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
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Posts: 11,876 Likes: 139 |
Bloody Nora! Just whack the thing with a big copper or lead mallet a couple of times.
Job done.
Absolutely.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Joined: Aug 2011
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Talk Morgan Guru
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Talk Morgan Guru
Joined: Aug 2011
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Bloody Nora! Just whack the thing with a big copper or lead mallet a couple of times.
Job done.
Absolutely. Well said young man. 
Bud
4/4 "Stanley"
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Joined: Jan 2016
Posts: 625
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jan 2016
Posts: 625 |
When I asked the same perennial question and along with the hammer advice someone mentioned 250nm / 184 lb ft which is roughly the same as our Lotus Elan
Cheers John
2011 4/4 - "Elrond"
2007 Elfin C3 Clubman - “Gimli”
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Joined: Aug 2015
Posts: 1,030
Has a lot to Say!
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Has a lot to Say!
Joined: Aug 2015
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Bloody Nora! Just whack the thing with a big copper or lead mallet a couple of times.
Job done.
Absolutely. Well said young man. Me too, and two taps is all, so I understand. The nut gets tightened further on the road. Oo-er missus!
Glenn
2001 Blacktop 4/4 Corsa Red 'Archie'
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Joined: Jan 2009
Posts: 4
New to Talk Morgan
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New to Talk Morgan
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The general accepted figure as used by TR / Aston people is about 300nm.
This sounds a lot, but anything less feels loose when undoing.
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Joined: Aug 2015
Posts: 1,030
Has a lot to Say!
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Has a lot to Say!
Joined: Aug 2015
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I forget to say that it is two taps off the ground, and two taps on the ground. These are the instructions from the MWS website: "Apply the spinner by hand and tighten 3 to 3½ turns; give the spinner a couple of taps with the hammer; lower the wheel to the ground and give the spinner a couple more taps. As long as the hubs are fitted correctly then the spinners will self-tighten and lock as the car is driving." I like the simplicity of this approach. Elementary. 
Glenn
2001 Blacktop 4/4 Corsa Red 'Archie'
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