3 4 U Bolt Torque Spec

Re use of original used spring u bolts is not recommended due to fatigue and stretching when u bolt was originally torqued.

3 4 u bolt torque spec.

1 2 90 ft lbs. Leaf spring u bolt kits for heavy trucks medium and light duty trucks and auto applications. Leaf spring u bolts are available from grade 5 u bolts to grade 8 u bolts. 9 16 130 ft lbs.

1 750 ft lbs. Clamp loads are based on 75 of the minimum proof loads for each grade and size. All u bolts must be re. Grade 2 calculations only cover fasteners 1 4 3 4 in diameter up to 6 long.

U bolts must be tightened and torqued using a cross pattern sequence tighten 1 then 4 to partial torque then partial torque 2 and 3 using the same sequence fully torque u bolt nuts. Recommended u bolt torque specifications. Removing the hi nuts from the u bolt will cause a cross threading that will not allow the u bolt to be adequately re torqued. For longer fasteners the torque is reduced significantly.

The higher the friction the less clamping force that is developed with the same torque. K 0 45 reused u bolt with dry and damaged threads. Although not always visible to the naked eye this damages the threads. Grade 2 grade 5 grade 8 18 8 s s bronze brass.

Coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine 4 5 2 4 8 4 3. Friction between the nut and the u bolt threads and washer. 1 1 4 1315 ft lbs. 3 4 315 ft lbs.

Material size 1 2 9 16 5 8 3 4 7 8 1 1 8 specifications 90 ft lbs 130 ibo 315 500 750 950 ft lbs ft lbs ft lbs ft lbs ft lbs ft lbs 1 3 1 5 ft lbs u bolt facts u bolts on many suspensions are what provide the necessary. Of torque k 0 20 new u bolt and nut with lubricated threads clamping force 30 000 lbs. 3 4 1 15 16 7 8 torque requirements. Sizes from 1 4 up are.

Suggested torque specifications based on u bolt size refer to vehicle manufacture s torque specification for exact torque. 7 8 500 ft lbs. 3 4 125 138 200 223 282 315 128 124 104 102 118 115 7 8 129 144 322 355 454 501 194 193 178 178 159 158 1 188 210 483 541 682 764 287 289 265 240 235 212 sizes from 4 to 10 are in in lbs. U bolt orders ship fast.

5 8 180 ft lbs. When a u bolt is tightened to it s recommended torque level the u bolt threads stretch as they mate with the hi nuts. Recommended bolt torque table size recommended torque. Assuming 1 rod and 500 ft lbs.

1 1 8 950 ft lbs. We supply round u bolts square u bolts and semi round u bolt kits complete.