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FerrariChat.com » Technical Q&A Archives » Archive through April 22, 2003 » Torque value for hub(?) to wheel fastening bolts on a 512BB « Previous Next »

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Grant Gilmour (Grantgilmour)
New member
Username: Grantgilmour

Post Number: 37
Registered: 8-2002
Posted on Tuesday, April 15, 2003 - 6:50 pm:   

I went for 65-70 ft-lbs and with the bend-up tabs I doubt the bolts will ever come loose.

Thanks for the suggestions.
Grant
Steve Magnusson (91tr)
Intermediate Member
Username: 91tr

Post Number: 1659
Registered: 1-2001
Posted on Tuesday, April 15, 2003 - 5:56 pm:   

Grant -- Just for a similar reference, the TR WSM 330/84 shows the torque for "screw securing flange to wheel" as 7.5 daN-m (or ~55 ft-lb) and the thread size as M12 x 1.25P. If you don't get a specific BB512 response, you'll just have to wing it by thread size -- e.g., if M12, something like 55~60 ft-lbs, or, if M14, something more like 80~85 ft-lbs as Philip recommended. Are the bolts anything oddball-ish? Size? Cone-seat or flat-seat on the heads?
Philip Airey (Pma1010)
Junior Member
Username: Pma1010

Post Number: 213
Registered: 7-2002
Posted on Tuesday, April 15, 2003 - 4:42 pm:   

Grant, not sure I fully understand but hopefully this helps. Wheel bolts on my 308 torqued to 85 ft lbs
Front wheel hub torqued to 11 ft lbs via center nut
Rear wheel hubs torqued to about 150 ft lbs via center nut

Torque specs usually in WSM
Philip
Grant Gilmour (Grantgilmour)
New member
Username: Grantgilmour

Post Number: 36
Registered: 8-2002
Posted on Tuesday, April 15, 2003 - 11:32 am:   

Just got my 512BB wheel back from the paint shop and they gave me back the splined hub assembly in a box. Any ideas on what the torque value should be for the five bolts holding the hub on the wheel?

Thanks in advance for the help.
Grant

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