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Ultra Maxi-Duty Casters

Capacity Range: 17,000 - 40,000 lbs.

  • Swivel Construction
1” thick mounting plate and ¾” thick plate steel legs continuously welded both inside and out.
  • Kingpin
Guaranteed-for-life 1 ½” dia. integrally formed with mounting plate, which won’t bend or break.
  • Main Load Bearing
Two precision thrust ball bearings. The outer thrust bearing is 13” in diameter and boasts an impressive 234,000 lbs. load rating and the inner thrust bearing is 7” diameter rated at a comfortable 100,000 lbs.
  • Secondary Load Bearing
A third highly specialized four point contact bearing supports the 1-1/2’ dia. integrally formed kingpin.
  • Axle
Stress proof steel, 2" dia for casters equipped with Press-on Poly & Nylast, all forged steel has 1-1/2” dia. axle except 8" x 3" has 1-1/4".
  • 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.
  • Custom Engineering
Hamilton engineers will custom design any caster to meet customer requirements.
 
The new Ultra Maxi-Duty with a load rating up to 40,000 lbs. per caster represents the highest capacity production caster series on the market today. Hamilton engineers started with a clean slate and built this series from the ground up with one task in mind: build the most durable 40,000 lbs. capacity caster possible! This new series is designed and built for extremely heavy duty applications such as shipbuilding, military, aerospace, and moving any other immense loads.

The UMD’s swivel design consists of two massive precision thrust ball bearings and a third highly specialized four point contact bearing that provides easy swiveling under extreme loads. This new series is offered in both single wheel and dual-wheel versions and all models are backed by Hamilton’s three year product warranty.
Hamilton Precision and Durability
The Ulta Maxi-Duty Series (UMD) is backed by Hamilton’s Three Year Product Warranty. Refer to selection table for qualifying wheels.
Ultra Maxi Duty Swivel Caster
#S-UMD2-104FST Swivel w/ Forged Steel Wheel

Ultra Maxi Duty Rigid Caster

Wheel Choices
Ultra Maxi-Duty Series Selection Table
:Three Year Warranty appliesDimensions in inches
Wheel
DiameterFaceType# of
Wheels
83

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

2
4
104

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

2
124

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

2
5

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

145

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

2
165

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

2
185

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

2
9

Heavy Duty Thick Tires bonded to Replaceable Rims pressed onto Heavy Duty Cast Iron Center

209

Heavy Duty Thick Tires bonded to Replaceable Rims pressed onto Heavy Duty Cast Iron Center

2
228

Heavy Duty Thick Tires bonded to Replaceable Rims pressed onto Heavy Duty Cast Iron Center

2
10
121
2
161
2812

Heavy Duty Thick Tires bonded to Replaceable Rims pressed onto Heavy Duty Cast Iron Center

2
1
16
3616

Heavy Duty Thick Tires bonded to Replaceable Rims pressed onto Heavy Duty Cast Iron Center

1
20
Model
Number
3 YR.
This Ultra Maxi-Duty Caster is backed by Hamilton's Three Year Product Warranty.
Weight
Lbs.
Load
Capacity
Lbs.
Overall
Height
S-UMD2-83FST2252800012 7/16
S-UMD2-84FST24534000
S-UMD2-104FST2753600014 7/16
S-UMD2-124FST3254000016 7/16
S-UMD2-125NYB3252500017 5/8
S-UMD2-145NYB3453000019 5/8
S-UMD2-165NYB3653500021 5/8
S-UMD2-185NYB4004000023 5/8
S-UMD2-1890POY78521800
S-UMD2-2090POY9652200025 5/8
S-UMD2-2280POY9752300027 5/8
S-UMD2-2210POY107528000
S-UMD-2212POY65017600
S-UMD2-2212POY115035000
S-UMD-2216POY94024000
S-UMD2-2812POY17504000033 5/8
S-UMD-2812POY95021200
S-UMD-2816POY120029300
S-UMD-3616POY16503500041 5/8
S-UMD-3620POY192040000
Model
Number
3 YR.
This Ultra Maxi-Duty Caster is backed by Hamilton's Three Year Product Warranty.
Weight
Lbs.
Load
Capacity
Lbs.
Overall
Height
R-UMD2-83FST1452800012 7/16
R-UMD2-84FST16534000
R-UMD2-104FST1903600014 7/16
R-UMD2-124FST2404000016 7/16
R-UMD2-125NYB2602500017 5/8
R-UMD2-145NYB2803000019 5/8
R-UMD2-165NYB3053500021 5/8
R-UMD2-185NYB3304000023 5/8
R-UMD2-1890POY67021800
R-UMD2-2090POY8802200025 5/8
R-UMD2-2280POY8702300027 5/8
R-UMD2-2210POY96028000
R-UMD-2212POY57017600
R-UMD2-2212POY104035000
R-UMD-2216POY82024000
R-UMD2-2812POY16354000033 5/8
R-UMD-2812POY87021200
R-UMD-2816POY108529300
R-UMD-3616POY15253500041 5/8
R-UMD-3620POY180040000