Max Torque Rating for 1/2" Studs on 7K Axle Hub and Drum Assembly

Question:

What torque should the lug nuts be when installing these hubs? Ive seen pictures of the lug post snapping off, so I dont want to over torque them. They will be installed on a 7K lb axel, I think my wheels are 17.5 inch aluminum. 2021, Grand Design, Solitude S-Class, 3950BH

asked by: Jon

Expert Reply:

For hubs that have 1/2" studs, like the Easy Grease Trailer Hub and Drum Assembly for 5.2K - 7K Axles # AKHD-865-7-2-EZ-K you're looking at, you don't want to exceed 120 ft-lbs as that's the most torque this stud size can handle. Since you have 17-1/2" wheels I do recommend going all the way to 120 ft-lbs.

If your wheels have a 9/16" stud (like most 17-1/2" wheels that fit with coned lug nuts do) I recommend going with the Hub and Drum Assembly # AKHD-865-7-1-EZ-K instead. This has the same specs as the one you're looking at except it uses the 9/16" studs. With this setup you're looking at a torque range of 130-150 ft-lbs for a 17-1/2" aluminum wheel!

expert reply by: Jon G