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Maxi-Duty Casters

Capacity Range: 3000 - 23,000 lbs.

  • Swivel Construction 
5/8" thick drop forged steel mounting plate (rigid plate 1/2" thick); 3/8" x 5" plate steel contoured legs are welded inside and outside to forged steel horn base.
  • Kingpin 
1 1/4" diameter integrally forged with mounting plate guaranteed for life, prevents bending or breaking; threaded for 1 1/4" slotted nut secured by roll pin for positive locking.
  • Main Load Bearing 
HPI™ thrust bearing with outside diameter of 7 1/2"; raceways hardened to 58-62HRC and ground to surface finish 16 micro inches.
  • Secondary Load Bearing 
1 1/4" precision tapered thrust bearing counteracts radial thrust.
  • Axle
1 1/4" diameter grade 5 hex head with slotted nut and cotter pin.
  • Lubrication Fittings
Ball-check type in swivel assembly and in wheel hubs with tapered or straight roller bearings.
  • Brakes
- Keep safety manager happy with a heavy duty face contact brake (-HCB). Select desired caster from selection table to see brake details.
  • Swivel Lock
4 Position (-4SL)- convert swivel to rigid for straight line steering, robotically welded housing & CNC-milled slots assure long lasting, trouble-free performance.
  • Sealed Swivel Assembly
(-SS) - prolongs caster life in harsh environments.
  • Wheel Bearing Seals
(-DS) - prolong wheel life in harsh environments.
  • V-Grooved Wheel Models
  • Custom Engineering
Hamilton engineers will custom design any caster to meet customer requirements.
 
Move over 10 tons on Hamilton’s top-of-the-line Maxi-Duty Casters, designed and built for the toughest applications including shipbuilding, manufactured housing, automotive and aerospace. Long life and dependable service are assured now more than ever with Hamilton's HPI™ Swivel Technology. The technology is a significant upgrade from conventional ball raceways or unit load bearings and provides an even stronger platform to support Hamilton’s three year product warranty. All forged steel wheels are machined with a slight crown to enhance rollability and swiveling.
Hamilton Precision and Durability
The enhanced Maxi-Duty Series features Hamilton’s Precision Integrated HPI™ Swivel Technology. This technology outperforms conventional CNC-machined ball raceways, kingpinless, and unit load bearing swivel constructions. The design improves the bearing’s element of contact and more than doubles the number of contact points. The HPI™ raceways are also 45% harder than conventional hardened raceways and the surface finish is an incredibly smooth 16 micro inches.

 

The Maxi-Duty Series (MD) is backed by Hamilton’s Three Year Product Warranty. Refer to selection table for qualifying wheels.
Maxi-Duty-Swivel-Caster
#S-MD-84FST Swivel w/ Forged Steel Wheel

Maxi-Duty-Rigid-Caster
#R-MD-83SYT Rigid w/ Superlast Wheel

Wheel Choices
Maxi-Duty Series Selection Table
= available for 24 Hour PRONTO® shipment :Three Year Warranty appliesDimensions in inches
Wheel
DiameterFaceType
63

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

Solid high capacity cast nylon resistant to moisture & many chemicals.

83

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

Solid high capacity cast nylon resistant to moisture & many chemicals.

New Ultimate Urethane 1" thick on forged steel center.

1" thick harder (70D) poly on forged steel for 30% more capacity than Superlast®.

1" thick 95A polyurethane tread chemically bonded to forged steel center.

4

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

103

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

Solid high capacity cast nylon resistant to moisture & many chemicals.

4

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

New Ultimate Urethane 1" thick on forged steel center.

1" thick harder (70D) poly on forged steel for 30% more capacity than Superlast®.

1" thick 95A polyurethane tread chemically bonded to forged steel center.

5

A harder (70D) liquid cast polyurethane with load capacity 30% higher than Duralast®.

Hamilton's classic liquid cast 95A polyurethane tread bonded to heavy duty iron center.

124

Highest capacity drop forged steel tensile strength in the 75,000 psi range.

Solid high capacity cast nylon resistant to moisture & many chemicals.

New Ultimate Urethane 1" thick on forged steel center.

1" thick harder (70D) poly on forged steel for 30% more capacity than Superlast®.

1" thick 95A polyurethane tread chemically bonded to forged steel center.

5

A harder (70D) liquid cast polyurethane with load capacity 30% higher than Duralast®.

Hamilton's classic liquid cast 95A polyurethane tread bonded to heavy duty iron center.

164

A harder (70D) liquid cast polyurethane with load capacity 30% higher than Duralast®.

Hamilton's classic liquid cast 95A polyurethane tread bonded to heavy duty iron center.

5

A harder (70D) liquid cast polyurethane with load capacity 30% higher than Duralast®.

Hamilton's classic liquid cast 95A polyurethane tread bonded to heavy duty iron center.

Model Number3 YR.
This Maxi-Duty Caster is backed by Hamilton's Three Year Product Warranty.
MSRPWeight
Lbs.
Load
Capacity
Lbs.
Overall
Height
S-MD-63FST$558611200010
S-MD-63NYB$553485400
S-MD-83FST$561701400011
S-MD-83NYB $623487200
S-MD-83STRT$803653500
S-MD-83SYT70$654644500
S-MD-83SYT$605643500
S-MD-84FST$6377617000
S-MD-103FST$587711600013
S-MD-103NYB $696558200
S-MD-104FST$6549018000
S-MD-104STRT$1,024875000
S-MD-104SYT70$793876500
S-MD-104SYT$731855000
S-MD-105DT70$734886500
S-MD-105DT$693885000
S-MD-124FST$8191152300015 1/2
S-MD-124NYB $98210010000
S-MD-124STRT$1,1771066000
S-MD-124SYT70$9001067800
S-MD-124SYT$8271036000
S-MD-125DT70$7761038000
S-MD-125DT$815996200
S-MD-164DT70$831114700019 1/2
S-MD-164DT$7501145500
S-MD-165DT70$1,14012510000
S-MD-165DT$1,0501257700
Model Number3 YR.
This Maxi-Duty Caster is backed by Hamilton's Three Year Product Warranty.
MSRPWeight
Lbs.
Load
Capacity
Lbs.
Overall
Height
R-MD-63FST$342441200010
R-MD-63NYB $337275400
R-MD-83FST$345551400011
R-MD-83NYB $407287200
R-MD-83STRT$587483500
R-MD-83SYT70$438484500
R-MD-83SYT$389473500
R-MD-84FST$4165917000
R-MD-103FST$386551600013
R-MD-103NYB $495428200
R-MD-104FST$4537418000
R-MD-104STRT$822685000
R-MD-104SYT70$592686500
R-MD-104SYT$529685000
R-MD-105DT70$525756500
R-MD-105DT$484735000
R-MD-124FST$5991002300015 1/2
R-MD-124NYB $7629010000
R-MD-124STRT$957966000
R-MD-124SYT70$680967800
R-MD-124SYT$607856000
R-MD-125DT70$562938000
R-MD-125DT$601836200
R-MD-164DT70$616104700019 1/2
R-MD-164DT$5351045500
R-MD-165DT70$92511710000
R-MD-165DT$8341157700