King Pin Inclination

[Synchro909]

Hello again guys,
I am putting together a front axle to replace the slightly bent one under the front of one of my As. I need to check the angle of the king pins with the rods I have made for the purpose. A figure of 7 degrees come to mind but I don't trust my memory these days. Can anybody please confirm? Please note that this is NOT the castor or camber angle of the wheel.

[RawhideKid]

I always remember 7° as the minimum angle for U-joints.

[Synchro909]

Originally Posted by RawhideKid

I always remember 7° as the minimum angle for U-joints.

Hmmmm, I remember & degrees as COLD!
I don't think that is where I got 7 into my head but I do know the figure was difficult to find.

[d.j. moordigian]

Originally Posted by Synchro909

Hello again guys,
I am putting together a front axle to replace the slightly bent one under the front of one of my As. I need to check the angle of the king pins with the rods I have made for the purpose. A figure of 7 degrees come to mind but I don't trust my memory these days. Can anybody please confirm? Please note that this is NOT the castor or camber angle of the wheel.

Ahhh...."king pin inclination".....I don't remember..
I'll see if I can dig it up..

[CWPASADENA]

You are correct.

7 Deg.

I just finished straightening an axle for one of my cars.

Chris W.

[Synchro909]

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Thank you very much for both the info and confirmation that my memory still works - at least sometimes!

[d.j. moordigian]

I measured a spindle an got 8°..

[Synchro909]

Originally Posted by d.j. moordigian

I measured a spindle an got 8°..

Thanks DJ.
I think I'll go with 7 as that's what I remember and has been confirmed.
I set it using a 1.4 metre long rod help centred in the king pin hole in the axle and a plumb bob. With the plumb bob hanging from this height, 7 degrees will give an offset at the bottom of 171mm. Easy and accurate!