Front Axle Nut Torque

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sportfan
Posts: 263
Joined: Thu Sep 20, 2018 11:33 pm
Location: Ponca City, Ok.
Your Car's Year / Make / Model: 2013 Fiat 500 Sport

Front Axle Nut Torque

Post by sportfan » Fri Mar 13, 2020 6:05 pm

I'm replacing my front half-shafts (axles) and I was looking for the torque value for axle nuts. I decided to change the wheel bearings while the car was down. Because I found many different values for it, Ii contacted SKF's automotive bearing engineer . This torque setting is for the SKF FW503 bearing which was the same bearing that came in the car. He said 229 foot pounds was it. It may be different for a different brand of bearing.

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MadFiat
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Your Car's Year / Make / Model: 2015 Fiat 500 Abarth
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Re: Front Axle Nut Torque

Post by MadFiat » Fri Mar 13, 2020 8:59 pm

Thanks!

That's a lot of torque innit.... Shouldn't come off.
2015 Rosso Abarth 5MT - MAD FIAT - EC Phase 2 + Supporting Mods
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sportfan
Posts: 263
Joined: Thu Sep 20, 2018 11:33 pm
Location: Ponca City, Ok.
Your Car's Year / Make / Model: 2013 Fiat 500 Sport

Re: Front Axle Nut Torque

Post by sportfan » Sat Mar 14, 2020 3:57 pm

It is a bunch. That bearing is an opposed angular contact bearing. The inner races have a gap between them . Once tightened up the gap closes up and preloads the bearing. The rolling element (balls) need a little preload to make them roll and not slide or skid. As long as the balls are rolling and have a film of oil between them and the races, it should last. Note: be sure you turn the bearing the correct way if you install new ones on your car.

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