RWM’s 125 Series features the patented Kingpinless™ caster design. This is the design that RWM patented, and that has proven itself to be the best solution for demanding applications. This is the caster design that all others are now copying because it is simply unmatched in extending service life and reducing all possible causes for caster failure. The 125 Series offers a capacity of up to 40,000 pounds. Typical applications include ground support equipment, die carts, and aircraft engine stands. Leg thickness of 1/2” adds extra strength and durability. All swivel sections are supplied with a lubrication fitting for field maintenance.
Raceway Design | Patented Kingpinless™ single ball bearing precision machined raceway hardened to 53 Rockwell C minimum, 7” diameter raceway with 3/4” diameter ball bearings. |
Capacity | Up to 40000 lbs. |
Finish | Laguna blue powder coat. |
Wheels | Wheels are either 3”, 4”, 5”, or 6” wide depending upon wheel size and type. Wheels have either a 3/4”, 1”, 1-1/4” or 1-1/2” roller bearing or 3/4”, 1”, 1-1/4” tapered wheel bearings. Roller bearing wheels rotate on a hardened and ground spanner, tapered wheel bearings rotate on the axle. All wheels are equipped with lubrication fittings. |
Mounting Plate Size | 8-1/2” x 8-1/2” x 1/2” |
Bolt Hole Spacing | 7”x 7” |
Mounting Bolt Diameter | 5/8” |
Tow lines | Boat & ship molding and building |
Abusive conditions | Storage tanks & gantries |
Automotive | Shock load applications |
Aerospace | Production line dollies |
Metal fabricating | Heavy machinery |
Military equipment | Mobile homes |
Tractor pulled trailers | Extreme duty platform trucks |
Air cargo & ground support equipment | Heavy-duty processing equipment |


BRAKES | |
FCWB | Face Contact Wheel Brake |
PCWB | Poly Cam Wheel Brake |
SWIVEL LOCKS | |
8 SL | Positional Swivel Lock |
DSL | Demountable Swivel Lock |
HDSL | Heavy-Duty Demountable Swivel Lock |
LSL | L-Type Swivel Lock |
SL | Swivel Lock |
VSL | Vertical Swivel Lock |
LUBRICATIONS | |
HT | High Temperature Lubrication |
LT | Low Temperature Lubrication |
FINISHES | |
HTP | High Temperature Paint |
ZP | Zinc Plated |
GUARDS, DISC AND SWEEPERS | |
FG | Foot Guard |
SR | Sealed Raceway |
SWP | Sweeper Brush |
WS | Wheel Seals |
![]() Wheel Diameter |
![]() Wheel Width |
![]() Capacity |
![]() Wheel Type |
![]() Overall Height |
![]() Straight Roller Bearing |
![]() Ball Bearing |
![]() Tapered Roller Bearing |
![]() Swivel Lead |
![]() Approx Weight |
---|---|---|---|---|---|---|---|---|---|
8″ | 4″ | 3500 | Urethane on Iron | 11″ | 125-UIR-0840-S | 125-UIT-0840-S | 2-3/16″ | 62 | |
8″ | 4″ | 4000 | Cast Iron | 11″ | 125-CIR-0840-S | 125-CIT-0840-S | 2-3/16″ | 70 | |
8″ | 4″ | 10000 | Forged Steel | 11″ | 125-FSR-0840-S | 2-3/16″ | 86 | ||
8″ | 4″ | 10000 | V-Grooved Forged | 11″ | 125-VFR-0840-S | 2-3/16″ | 80 | ||
8″ | 4″ | 14000 | Nylatron HD | 11″ | 125-NYB-0840-S | 2-3/16″ | 60 | ||
8″ | 4″ | 15000 | V-Grooved Forged | 11″ | 125-VFT-0840-S | 2-3/16″ | 80 | ||
8″ | 4″ | 20000 | Forged Steel – HD | 11″ | 125-FST-0840-S | 2-3/16″ | 86 | ||
10″ | 4″ | 1400 | Rubber On Iron | 13″ | 125-RIR-1040-S | 125-RIT-1040-S | 2-9/16″ | 72 | |
10″ | 4″ | 4200 | Urethane on Iron | 13″ | 125-UIR-1040-S | 125-UIT-1040-S | 2-9/16″ | 75 | |
10″ | 4″ | 4500 | Ultra Thick Urethane | 13″ | 125-UTR-1040-S | 125-UTT-1040-S | 2-9/16″ | 62 | |
10″ | 4″ | 5000 | Cast Iron | 13″ | 125-CIR-1040-S | 125-CIT-1040-S | 2-9/16″ | 90 | |
10″ | 4″ | 10000 | Forged Steel | 13″ | 125-FSR-1040-S | 2-9/16″ | 100 | ||
10″ | 4″ | 10000 | V-Grooved Forged | 13″ | 125-VFR-1040-S | 2-9/16″ | 92 | ||
10″ | 4″ | 15000 | V-Grooved Forged | 13″ | 125-VFT-1040-S | 2-9/16″ | 92 | ||
10″ | 4″ | 16500 | Nylatron HD | 13″ | 125-NYB-1040-S | 2-9/16″ | 70 | ||
10″ | 4″ | 20000 | Forged Steel – HD | 13″ | 125-FST-1040-S | 2-9/16″ | 100 | ||
10″ | 5″ | 5000 | Urethane on Iron | 13″ | 125-UIR-1050-S | 125-UIT-1050-S | 2-9/16″ | 80 | |
10″ | 5″ | 6000 | Cast Iron | 13″ | 125-CIR-1050-S | 125-CIT-1050-S | 2-9/16″ | 95 | |
11″ | 5″ | 1760 | Rubber On Iron | 14″ | 125-RIR-1150-S | 125-RIT-1150-S | 2-5/8″ | 85 | |
11″ | 5″ | 5500 | Urethane on Iron | 14″ | 125-UIR-1150-S | 125-UIT-1150-S | 2-5/8″ | 85 | |
11″ | 6″ | 10000 | Cast Iron | 14″ | 125-CIR-1160-S | 125-CIT-1160-S | 2-3/4″ | 95 | |
12″ | 4″ | 1600 | Rubber On Iron | 15-1/2″ | 125-RIR-1240-S | 125-RIT-1240-S | 3-3/8″ | 78 | |
12″ | 4″ | 4800 | Urethane on Iron | 15-1/2″ | 125-UIR-1240-S | 125-UIT-1240-S | 3-3/8″ | 78 | |
12″ | 4″ | 5300 | Ultra Thick Urethane | 15-1/2″ | 125-UTR-1240-S | 125-UTT-1240-S | 3-3/8″ | 75 | |
12″ | 5″ | 2050 | Rubber On Iron | 15-1/2″ | 125-RIR-1250-S | 125-RIT-1250-S | 3-3/8″ | 90 | |
12″ | 5″ | 6000 | Urethane on Iron | 15-1/2″ | 125-UIR-1250-S | 125-UIT-1250-S | 3-3/8″ | 90 | |
12″ | 5″ | 6500 | Ultra Thick Urethane | 15-1/2″ | 125-UTR-1250-S | 125-UTT-1250-S | 3-3/8″ | 78 | |
12″ | 6″ | 7500 | Urethane on Iron | 15-1/2″ | 125-UIR-1260-S | 125-UIT-1260-S | 3-3/8″ | 95 | |
12″ | 6″ | 10000 | Cast Iron | 15-1/2″ | 125-CIR-1260-S | 125-CIT-1260-S | 3-3/8″ | 130 | |
14″ | 4″ | 6200 | Ultra Thick Urethane | 18″ | 125-UTR-1440-S | 125-UTT-1440-S | 3-11/16″ | 90 | |
14″ | 5″ | 7600 | Ultra Thick Urethane | 18″ | 125-UTR-1450-S | 125-UTT-1450-S | 3-11/16″ | 85 | |
14″ | 6″ | 7800 | Urethane on Iron | 18″ | 125-UIR-1460-S | 125-UIT-1460-S | 3-11/16″ | 120 | |
14″ | 6″ | 9000 | Ultra Thick Urethane | 18″ | 125-UTR-1460-S | 125-UTT-1460-S | 3-11/16″ | 140 | |
16″ | 4″ | 2050 | Rubber On Iron | 19″ | 125-RIR-1640-S | 125-RIT-1640-S | 3-9/16″ | 130 | |
16″ | 4″ | 6000 | Urethane on Iron | 19″ | 125-UIR-1640-S | 125-UIT-1640-S | 3-9/16″ | 130 | |
16″ | 4″ | 7100 | Ultra Thick Urethane | 19″ | 125-UTR-1640-S | 125-UTT-1640-S | 3-9/16″ | 97 | |
16″ | 5″ | 2570 | Rubber On Iron | 19″ | 125-RIR-1650-S | 125-RIT-1650-S | 3-9/16″ | 140 | |
16″ | 5″ | 8400 | Urethane on Iron | 19″ | 125-UIR-1650-S | 125-UIT-1650-S | 3-9/16″ | 140 | |
16″ | 5″ | 8800 | Ultra Thick Urethane | 19″ | 125-UTR-1650-S | 125-UTT-1650-S | 3-9/16″ | 130 | |
18″ | 5″ | 2800 | Rubber On Iron | 22″ | 125-RIR-1850-S | 125-RIT-1850-S | 4-1/4″ | 150 | |
18″ | 5″ | 8600 | Urethane on Iron | 22″ | 125-UIR-1850-S | 125-UIT-1850-S | 4-1/4″ | 138 | |
20″ | 5″ | 2900 | Rubber On Iron | 23″ | 125-RIR-2050-S | 125-RIT-2050-S | 4-1/4″ | 155 | |
20″ | 5″ | 9000 | Urethane on Iron | 23″ | 125-UIR-2050-S | 125-UIT-2050-S | 4-1/4″ | 149 |
To order a rigid caster, change the “S” to “R” in the model number. For example: “125-CIR-0840-R”. To order rig only, omit the blue letters. For example: “125-0840-S”. Dimensions shown are nominal. If precise dimensions are required, consult your RWM representative.For approximate weight of our rigid casters, deduct 12.5 pounds per item.