4" x 2" Cast lron V-Groove Wheel Kingpinless Swivel Caster - 600 Lbs Capacity plate-size- 3-1/8-x-4-1/8 These bearings also work well

These bearings also work well for applications that are particularly hard on bearings

Swivel Radius: N/A Overall Height: 6-1/2" Swivel Construction:  N/A Temp Range: -40°F to 550°F  Mounting Plate: 4" x 4-1/2" U-Groove Width: 1

Wheel Diameter:3" Tread Width:1-1/4" Stem Size:1/2"

Bearing Type:None Plain Bore ID:1-3/16" Accepted Axle/Bearing ID:See Bearing Options Wheel Durometer:Rockwell 74B

Wheel Durometer: Rockwell 75B Plain Bore ID: N/A Low Temp Range: -45˚F Bearing ID: 3/4"

4" x 2" Cast lron V-Groove Wheel Kingpinless Swivel Caster - 600 Lbs Capacity plate-size- 3-1/8-x-4-1/8 These bearings also work well4" x 2" Cast lron V Groove Wheel Kingpinless Swivel Caster Part # P51042VIRB V groove wheels are designed to guide equipment by rolling on inverted angle iron track, however, they can also operate off the track thanks to the tread on either side of the v groove. Cast Iron is the standard metal wheel used by most unless a heavier capacity or greater impact strength metal wheel is needed. For applications requiring more capacity or impact strength,