Hamilton Maxi-Duty Series – Super Duty

Capacity Range: 3200 – 23,000 lbs.

Power through the toughest jobs with Hamilton’s premium Maxi-Duty Casters, engineered for heavy-duty applications like shipbuilding, manufactured housing, automotive, and aerospace. Move over 10 tons with ease, backed by Hamilton’s advanced HPI™ Swivel Technology—a major upgrade from traditional ball raceways or unit load bearings. This innovation ensures longer-lasting performance and supports our industry-leading three-year warranty. Forged steel wheels, precision-machined with a slight crown, deliver superior rollability and smooth swiveling for reliable service in demanding environments.

Hamilton Maxi-Duty Series – Super Duty

Capacity Range: 3200 – 23,000 lbs.

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MD Series Features & Specs.

Swivel Construction
5/8″ thick drop forged steel mounting plate (rigid plate 1/2″ thick); 3/8″ x 5″ precision laser cut 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.
Product Finish
Powder Coated – Caster rigs are powder coated with Hamilton’s Platinum Powder, a metallic HAA Polyester providing a premium look and excellent durability for both interior and exterior environments.
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.

Click here to read more about the Hamilton Caster Company.

Name	Capacity	Wheel Diameter	Wheel Tread Core	Wheel Color	Wheel Bearing	Buy
S-MD-83SYT70	4500 lb	8	Polyurethane on Steel	Thick Black Poly on Gray Center	Tapered Roller	S-MD-83SYT70 quantity Add to Quote
S-MD-164DT70	7000 lb	16	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	S-MD-164DT70 quantity Add to Quote
S-MD-1643SGB95	8900 lb	16	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1643SGB95 quantity Add to Quote
S-MD-1642GB95	7200 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1642GB95 quantity Add to Quote
S-MD-105GB95	5000 lb	10	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-105GB95 quantity Add to Quote
S-MD-104NYB	8200 lb	10	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-104NYB quantity Add to Quote
R-MD-84SWC95	4500 lb	8	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	R-MD-84SWC95 quantity Add to Quote
R-MD-165GB95	7200 lb	16	Polyurethane on Cast Iron	Gray Poly on Black Center	Precision Sealed Ball	R-MD-165GB95 quantity Add to Quote
R-MD-145NYB	15000 lb	14	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-145NYB quantity Add to Quote
R-MD-125NYB	12500 lb	12	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-125NYB quantity Add to Quote
S-MD-84SWC95	4500 lb	8	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	S-MD-84SWC95 quantity Add to Quote
S-MD-165GB95	7200 lb	16	Polyurethane on Cast Iron	Gray Poly on Black Center	Precision Sealed Ball	S-MD-165GB95 quantity Add to Quote
S-MD-165DT	7700 lb	16	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	S-MD-165DT quantity Add to Quote
S-MD-164GB95	6000 lb	16	Polyurethane on Cast Iron	Gray Poly on Black Center	Precision Sealed Ball	S-MD-164GB95 quantity Add to Quote
S-MD-125GB95	6300 lb	12	Polyurethane on Cast Iron	Gray Poly on Black Center	Precision Sealed Ball	S-MD-125GB95 quantity Add to Quote
S-MD-105DT70	6500 lb	10	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	S-MD-105DT70 quantity Add to Quote
S-MD-104SGB95	5000 lb	10	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-104SGB95 quantity Add to Quote
S-MD-103NYB	8200 lb	10	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-103NYB quantity Add to Quote
R-MD-84FST	17000 lb	8	Metal on Steel	Clearcoat	Tapered Roller	R-MD-84FST quantity Add to Quote
R-MD-65SWF70D	5100 lb	6	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	R-MD-65SWF70D quantity Add to Quote
R-MD-64SWF70D	3850 lb	6	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	R-MD-64SWF70D quantity Add to Quote
R-MD-165DT70	10000 lb	16	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	R-MD-165DT70 quantity Add to Quote
R-MD-125GB95	6300 lb	12	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-125GB95 quantity Add to Quote
R-MD-124SYT70	7800 lb	12	Polyurethane on Steel	Thick Black Poly on Gray Center	Tapered Roller	R-MD-124SYT70 quantity Add to Quote
R-MD-105DT70	6500 lb	10	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	R-MD-105DT70 quantity Add to Quote
R-MD-104SGB95	5000 lb	10	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-104SGB95 quantity Add to Quote
S-MD-84NYB	7500 lb	8	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-84NYB quantity Add to Quote
S-MD-84FST	17000 lb	8	Metal on Steel	Clearcoat	Tapered Roller	S-MD-84FST quantity Add to Quote
S-MD-83SYT	3500 lb	8	Polyurethane on Steel	Thick Blue Poly on Gray Center	Tapered Roller	S-MD-83SYT quantity Add to Quote
S-MD-83NYB	7200 lb	8	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-83NYB quantity Add to Quote
S-MD-83FST	14000 lb	8	Metal on Steel	Clearcoat	Tapered Roller	S-MD-83FST quantity Add to Quote
S-MD-64NYB	6500 lb	6	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-64NYB quantity Add to Quote
S-MD-63NYB	5400 lb	6	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-63NYB quantity Add to Quote
S-MD-1653GB95	11500 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1653GB95 quantity Add to Quote
S-MD-1652GB95	10000 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1652GB95 quantity Add to Quote
S-MD-164DT	5500 lb	16	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	S-MD-164DT quantity Add to Quote
S-MD-105DT	5000 lb	10	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	S-MD-105DT quantity Add to Quote
R-MD-85SWC95	5000 lb	8	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	R-MD-85SWC95 quantity Add to Quote
R-MD-64SWC95	3200 lb	6	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	R-MD-64SWC95 quantity Add to Quote
R-MD-64NYB	6500 lb	6	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-64NYB quantity Add to Quote
R-MD-165DT	7700 lb	16	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	R-MD-165DT quantity Add to Quote
R-MD-1653GB95	11500 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1653GB95 quantity Add to Quote
R-MD-164DT	5500 lb	16	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	R-MD-164DT quantity Add to Quote
R-MD-1642GB95	7200 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1642GB95 quantity Add to Quote
R-MD-125DT70	8000 lb	12	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	R-MD-125DT70 quantity Add to Quote
R-MD-125DT	6200 lb	12	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	R-MD-125DT quantity Add to Quote
R-MD-105DT	5000 lb	10	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	R-MD-105DT quantity Add to Quote
R-MD-104SYT70	6500 lb	10	Polyurethane on Steel	Thick Black Poly on Gray Center	Tapered Roller	R-MD-104SYT70 quantity Add to Quote
S-MD-165DT70	10000 lb	16	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	S-MD-165DT70 quantity Add to Quote
S-MD-1252SGB95	7500 lb	12	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1252SGB95 quantity Add to Quote
S-MD-124SWF95	5650 lb	12	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	S-MD-124SWF95 quantity Add to Quote
S-MD-124SWF70D	6800 lb	12	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	S-MD-124SWF70D quantity Add to Quote
S-MD-124SGB95	5500 lb	12	Polyurethane on Steel	Gray Poly on Black Center	Precision Sealed Ball	S-MD-124SGB95 quantity Add to Quote
S-MD-124NYB	10000 lb	12	Nylon	Charcoal gray	Precision Sealed Ball	S-MD-124NYB quantity Add to Quote
S-MD-104SYT70	6500 lb	10	Polyurethane on Steel	Black Poly on Gray Center	Tapered Roller	S-MD-104SYT70 quantity Add to Quote
S-MD-104SYT	5000 lb	10	Polyurethane on Steel	Thick Blue Poly on Gray Center	Tapered Roller	S-MD-104SYT quantity Add to Quote
R-MD-83NYB	7200 lb	8	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-83NYB quantity Add to Quote
S-MD-64SWF70D	3850 lb	6	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	S-MD-64SWF70D quantity Add to Quote
S-MD-64SWC95	3200 lb	6	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	S-MD-64SWC95 quantity Add to Quote
S-MD-125DT70	8000 lb	12	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	S-MD-125DT70 quantity Add to Quote
S-MD-125DT	6200 lb	12	Polyurethane on Cast Iron	Green Poly on Gray Center	Tapered Roller	S-MD-125DT quantity Add to Quote
S-MD-124SYT70	7800 lb	12	Polyurethane on Steel	Black Poly on Gray Center	Tapered Roller	S-MD-124SYT70 quantity Add to Quote
S-MD-124SYT	6000 lb	12	Polyurethane on Steel	Blue Poly on Gray Center	Tapered Roller	S-MD-124SYT quantity Add to Quote
R-MD-164GB95	6000 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-164GB95 quantity Add to Quote
R-MD-1643SGB95	8900 lb	16	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1643SGB95 quantity Add to Quote
R-MD-124NYB	10000 lb	12	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-124NYB quantity Add to Quote
R-MD-1242SGB95	7200 lb	12	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1242SGB95 quantity Add to Quote
R-MD-105GB95	5000 lb	10	Polyurethane on Cast Iron	Gray Poly on Black Center	Precision Sealed Ball	R-MD-105GB95 quantity Add to Quote
R-MD-104NYB	8200 lb	10	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-104NYB quantity Add to Quote
R-MD-1042SGB95	6500 lb	10	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1042SGB95 quantity Add to Quote
S-MD-1242SGB95	7200 lb	12	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1242SGB95 quantity Add to Quote
S-MD-104FST	18000 lb	10	Metal on Steel	Clearcoat	Tapered Roller	S-MD-104FST quantity Add to Quote
S-MD-1042SGB95	6500 lb	10	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1042SGB95 quantity Add to Quote
R-MD-84SWF70D	5400 lb	8	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	R-MD-84SWF70D quantity Add to Quote
R-MD-83SYT70	4500 lb	8	Polyurethane on Steel	Black Poly on Gray Center	Tapered Roller	R-MD-83SYT70 quantity Add to Quote
R-MD-83SYT	3500 lb	8	Polyurethane on Steel	Blue Poly on Gray Center	Tapered Roller	R-MD-83SYT quantity Add to Quote
R-MD-83FST	14000 lb	8	Metal on Steel	Clearcoat	Tapered Roller	R-MD-83FST quantity Add to Quote
R-MD-63NYB	5400 lb	6	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-63NYB quantity Add to Quote
R-MD-63FST	12000 lb	6	Metal on Steel	Clearcoat	Tapered Roller	R-MD-63FST quantity Add to Quote
R-MD-165NYB	17500 lb	16	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-165NYB quantity Add to Quote
R-MD-1252SGB95	7500 lb	12	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1252SGB95 quantity Add to Quote
R-MD-124SWF95	5650 lb	12	Polyurethane on Aluminum	Grey Tread on Alum Center	Precision Sealed Ball	R-MD-124SWF95 quantity Add to Quote
R-MD-124FST	23000 lb	12	Metal on Steel	Clearcoat	Tapered Roller	R-MD-124FST quantity Add to Quote
R-MD-104SYT	5000 lb	10	Polyurethane on Steel	Thick Blue Poly on Gray Center	Tapered Roller	R-MD-104SYT quantity Add to Quote
R-MD-103FST	6000 lb	10	Metal on Steel	Clearcoat	Tapered Roller	R-MD-103FST quantity Add to Quote
S-MD-84SWF70D	5400 lb	8	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	S-MD-84SWF70D quantity Add to Quote
S-MD-63FST	12000 lb	6	Metal on Steel	Clearcoat	Tapered Roller	S-MD-63FST quantity Add to Quote
S-MD-1633SGB95	6800 lb	16	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	S-MD-1633SGB95 quantity Add to Quote
S-MD-124FST	23000 lb	12	Metal on Steel	Clearcoat	Tapered Roller	S-MD-124FST quantity Add to Quote
S-MD-103FST	6000 lb	10	Metal on Steel	Clearcoat	Tapered Roller	S-MD-103FST quantity Add to Quote
R-MD-85SWF70D	6000 lb	8	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	R-MD-85SWF70D quantity Add to Quote
R-MD-84NYB	7500 lb	8	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-84NYB quantity Add to Quote
R-MD-185NYB	20000 lb	18	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-185NYB quantity Add to Quote
R-MD-1652GB95	10000 lb	16	Polyurethane on Cast Iron	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1652GB95 quantity Add to Quote
R-MD-164DT70	7000 lb	16	Polyurethane on Cast Iron	Black Poly on Gray Center	Tapered Roller	R-MD-164DT70 quantity Add to Quote
R-MD-1633SGB95	6800 lb	16	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-1633SGB95 quantity Add to Quote
R-MD-124SYT	6000 lb	12	Polyurethane on Steel	Thick Blue Poly on Gray Center	Tapered Roller	R-MD-124SYT quantity Add to Quote
R-MD-124SWF70D	6800 lb	12	Polyurethane on Aluminum	Black Tread on Alum Center	Precision Sealed Ball	R-MD-124SWF70D quantity Add to Quote
R-MD-124SGB95	5500 lb	12	Polyurethane on Steel	Thick Gray Poly on Black Center	Precision Sealed Ball	R-MD-124SGB95 quantity Add to Quote
R-MD-104FST	18000 lb	10	Metal on Steel	Clearcoat	Tapered Roller	R-MD-104FST quantity Add to Quote
R-MD-103NYB	8200 lb	10	Nylon	Charcoal gray	Precision Sealed Ball	R-MD-103NYB quantity Add to Quote

Hamilton Maxi-Duty Series – Super Duty

Hamilton Maxi-Duty Series – Super Duty

MD Series Features & Specs.

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