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Duff-Norton

Anode Jacks

Duff-Norton was the originator of the Anode Jack, which was developed in partnership with the Aluminum Industry. Our jacks were used in the first commercial aluminum-making plant in the United States and continue to be used in aluminum plants throughout the world.

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Anti-Backlash Actuator 1/4 Ton to 150 Ton

Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads, detrimental screw movement may occur. When the actuator is under load, the lifting screws' threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.

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Continuous Duty Cycle 3,500 lbs. to 27,000 lb

Duff-Norton Continuous Duty Cycle actuators are specifically designed for continuous operation. The gear set operates in an oil bath for thermal efficiency and long life. The shell is made of a finned aluminum for better cooling properties. Additionally, the Duff-Norton ball screw system increases these models efficiency.

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Duff-Norton Air Motor Jacks

Duff-Norton Air Motor Jacks are offered in several models. These precision built, sturdy, dependable machines employ the use of the screw principle with a built in rotary air motor. Typically used for raising and lowering freight wagons, locomotives and rail rolling stock.

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Duff-Norton Swivels

ROTARY UNION transfers media (water, steam, air, oil, hydraulic fluid, etc) from a stationary source to rotating machinery, such as a drum or an indexing table. They are used in process industries such as; paper, printing, rubber and plastics, textile and chemical. Rotary Unions are also used on cranes, machine tools and many other applications. Duff-Norton Rotary Unions are used to provide heating or cooling media like steam, hot oil, water or coolant to control the surface temperature of a drum or roll, to transfer air or hydraulic fluid to moving components or to add fluids to mixers while in motion. Rotary unions, rotary joints and rotating joints ranging up to 750 psi and up to 5,000 RPM are available.

Swivels

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HMPB SERIES 250LB

CAPACITY

250 lbs

(1,112 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF

(-29ºC to 50ºC)

(Special grease for low temperature)

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HMPB SERIES 500LB

CAPACITY

500 lbs
(2,224 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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HMPD SERIES

CAPACITY

250 lbs
(1,112 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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HSPB SERIES

CAPACITY

250 lbs
(1,112 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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LSPD SERIES

CAPACITY

1,500 lbs
(6,672 N)

TUBE RESTRAINING TORQUE

215 in-lbf (24.2 Nm)

TEMPERATURE RANGE

15ºF to 120ºF
(-10ºC to 50ºC)

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LT SERIES

CAPACITY

27 to 225 lbs

(120 to 1,000 N)

VOLTAGE

12 or 24 VDC

TEMPERATURE RANGE

-13ºF to 150ºF
(-25ºC to 65ºC)

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MPD SERIES

CAPACITY

500 lbs
(2,224 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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SCN03 SERIES

CAPACITY

3 Ton
(26.6 kN)

BRAKE MOTOR

TEFC 230/460 Vac, 3ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)*

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SCN06 SERIES

CAPACITY

6 Ton
(53 kN)

BRAKE MOTOR

TEFC 230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)*

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SCN12 SERIES

CAPACITY

12 Ton
(106.7 kN)

BRAKE MOTOR

TEFC 230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)*

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SCN25 SERIES

CAPACITY

25 Ton
(222 kN)

BRAKE MOTOR

TEFC 230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)*

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SCW10 SERIES

CAPACITY

10 Ton
(89.9 kN)

BRAKE MOTOR

230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)

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SCW20 SERIES

CAPACITY

20 Ton
(177.9 kN)

BRAKE MOTOR

230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)

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SCW25 SERIES

CAPACITY

25 Ton
(222 kN)

BRAKE MOTOR

230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)

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SCW5 SERIES

CAPACITY

5 Ton

(44.4 kN)

BRAKE MOTOR

230/460 Vac, 3 ph, 60 Hz

TEMPERATURE RANGE

0ºF to 120ºF
(-18ºC to 50ºC)

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SPA SERIES

CAPACITY

1,500 lbs
(6,672 N)

TUBE RESTRAINING TORQUE

215 in-lbf (24.2 Nm)

TEMPERATURE RANGE

15ºF to 120ºF
(-10ºC to 50ºC)

(Special grease for low temperature)

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SPB SERIES

CAPACITY

500 lbs

(2,224 N)

TUBE RESTRAINING TORQUE

60 in-lbf (6.7 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF

(-29ºC to 50ºC)

(Special grease for low temperature)

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Stainless Steel Anti-Backlash 2 Ton to 150 Ton

Stainless Steel Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear along with the same great corrosion resistance offered by our standard stainless steel actuators. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.

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Stainless Steel Machine Screw 2 Ton to 100 Ton

For harsh environments, Duff-Norton offers a complete line of stainless steel machine screw actuators in standard and special configurations for loads up to 100 tons.

Duff-Norton Stainless Steel actuators incorporate all of the same features as Duff-Norton's standard machine screw actuators, but can be used in severe environments where other materials are inadequate. All exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard. Options include: anti-backlash and keyed lifting screws for translating screw models.

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TAC SERIES

CAPACITY

500 lbs
(2,224 N)

TUBE RESTRAINING TORQUE

40 in-lbf (4.5 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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TAL SERIES

CAPACITY

1,000 lbs
(4,448 N)

TUBE RESTRAINING TORQUE

80 in-lbf (9 Nm)

TEMPERATURE RANGE

-20ºF to 120ºF
(-29ºC to 50ºC)

(Special grease for low temperature)

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