Casters
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Heavy Duty Ground Support Casters

Capacity Range: 1500 - 4200 lbs.

  • Swivel Construction
Drop forged steel mounting plate and horn base.
  • Kingpin
Integrally forged with mounting plate. 1" diameter on all but the 21" model which has a 1 1/4" kingpin.
  • Main Load Raceway
large diameter raceway machined for hardened and polished steel balls. The 21" model uses Hamilton’s HPI™ Swivel Technology.
  • Secondary Load Bearing
Precision tapered thrust bearing counteracts radial thrust.
  • Axle
3/4" on 10" and 12" models, 1" axle on 14", 16" and 18" models; 21" models have 1 1/4" axle.
  • Lubrication Fittings
Ball-check type in swivel assembly and in wheel hubs.
  • Swivel Lock
4 Position (-4SL)- convert swivel to rigid for straight line steering.
  • Gray Non-marking Tires
 
  • Special Overall Height
 
  • Heavy Duty Contact Brake
 
 
Hamilton's 7500 Series is the ultimate marriage of a truly heavy duty solid pneumatic tire with Hamilton’s premium forged steel swivel caster technology. This series is ideally suited for heavy duty ground support applications. Available in six wheel diameters from 10" x 4" to 21" x 6", all wheels are equipped with 1" or 1 1/4" precision tapered roller bearings making them well suited for Ground Support towing applications.

The 16", 18", and 21" wheels are comprised of three tread sections: a firm, stable base compound for strong rim adhesion; a very resilient middle section to dampen the shock of uneven rolling surfaces; and a tough low rolling resistance tread to reduce energy consumption. The result is a soft ride that compares with full pneumatic tires, but with much higher capacities than their air-filled cousins.

The 12" and 14" wheels are comprised of two tread sections. The same stable base found on the other wheels for strong rim adhesion combined with a tough abrasion resistant outer tread compound.
Hamilton Precision and Durability
The enhanced Maxi-Duty Series now features Hamilton’s Precision Integrated HPI™ Swivel Technology. This new technology outperforms conventional CNC-machined ball raceways, kingpinless, and unit load bearing swivel constructions. The new design improves the bearing’s element of contact and more than doubles the number of contact points. The new HPI™ raceways are also 45% harder than conventional hardened raceways and the surface finish is an incredibly smooth 16 micro inches.
#S-7516-SPRT Swivel w/ Solid Pneumatic Wheel
Ground Support Series Selection Table
= available for 24 Hour PRONTO® shipment Dimensions in inches
Wheel
Nominal
Diameter
Tire
Size
10400 x 6
12200 x 8
14300 x 8
16400 x 8
18500 x 8
21600 x 9
Model
Number
MSRPWeight
Lbs.
Load
Capacity
Lbs.
Overall
Height
Mounting
Plate
S-7510-SPRT$31333100012 1/84 1/2 X 6 1/2
S-7512-SPRT$40243120015 1/26 1/8 X 7 1/2
S-7514-SPRT$61654150017 1/26 1/8 x 7 1/2
S-7516-SPRT$62870290018 1/26 1/8 x 7 1/2
S-7518-SPRT$688883300216 1/8 x 7 1/2
S-7521-SPRT$8551754200248 1/2 x 8 1/2
Model
Number
MSRPWeight
Lbs.
Load
Capacity
Lbs.
Overall
Height
Mounting
Plate
R-7510-SPRT$21328100012 1/84 1/2 X 6 1/2
R-7512-SPRT$33939120015 1/26 1/8 X 7 1/2
R-7514-SPRT$53847150017 1/26 1/8 x 7 1/2
R-7516-SPRT$54963290018 1/26 1/8 x 7 1/2
R-7518-SPRT$620823300216 1/8 x 7 1/2
R-7521-SPRT$7841094200248 1/2 x 8 1/2