55/56-Heavy Duty Forged Series-3,500 lb
- Drop forged (ASTM1045) 3/8" thick swivel head
- Integrally forged kingpin 1" diameter
- Lower raceway thrust bearing is a tapered roller bearing, providing exceptionally smooth and easy swiveling action and counteracts radial thrust
- 1/2" diameter hardened ball bearings as main load bearings, with precision tapered thrust bearings
- 3/8" thick steel legs
- Zinc-plated finish
- 3/4" axle bolt with grease fitting