Friday, October 17, 2014

How Heavy Duty Can We Get? 18,000 lbs. capacity Kingpinless Swivel Caster

We have a customer who builds yachts.  The mold for the yacht is carried by heavy-duty kingpinless swivel casters with 18,000 lbs. capacity per caster.  The yacht is move through the production line being towed to the different areas of the manufacturing facility on these casters.  Our solution is the 63 Series Extreme Heavy-Duty Kingpinless Swivel Caster with 8" x 4" forged steel wheel with tapered bearings.
This caster is used in extreme heavy duty applications where abusive and shock load and towing are present.  The 63 series casters are made of ASTM1045 steel, drop forged 1/2" thick top plate with a forged 4.5" diameter precision machined swivel race with a single row of 5/8" hardened ball bearings.  The legs are formed from 3/8" steel double welded to the outer raceway for added strength.  The offset raceway design, heat treatment, and tampering process allows the casters to carry the maximum weight of the bearings used, without horizontal wear, or fracturing of welds.  This also helps with side thrust force.  The kinpinless raceways are hot forged with a one piece integrally forged top plate.  The 63 series has a 6.25" x 7.5" top plate size with 4.5" x 6" slotted to 4 - 1/8" x 6 - 1/8" slotted bolt hole spacing.  1/2" or 9/16" attaching bolts can be used to mount the casters if not welded.  10.5" overall height.  
The 8" x 4" drop forged steel wheels are made of ASTM 1045 high carbon steel hot drop forged.  This improves the structure of the wheel, enhancing ductibility and tensile strength.  The forged steel wheels have a hardness of Rockwell 80B; Tensile Strength of 60,000psi and temperature range up to 1,300 degrees F.  The tread face is machine for a smooth, entrical ride, tread edge is machined round.  Tapered roller bearings in the wheel are the heaviest duty type of wheel bearings.  This bearing allows for towing very heavy loads and high weight capacity.  Tapered roller bearings should be lubricated on a maintenance schedule.  
We do have casters that go up to 40,000 lbs. capacity but most of those are as a dual wheel caster.  This 8" x 4" heavy-duty kingpinless swivel caster is made to be used in extreme applications like the yacht production industry.  We can get heavy!
Heavy-duty caster used
in yacht production facility.
Swivel kingpinless caster
with 8" x 4" forged steel wheel