NDM Series Worm Gear Screw Jacks are robust linear motion actuators designed for heavy-duty lifting, precise positioning, and synchronized multi-point motion. Using a worm-gear reducer paired with a trapezoidal (T-type) screw, the system ensures smooth transmission, high self-locking capability, and long service life even under continuous duty.

The product range includes capacities from 1T to 100T, supporting both translating screw type (Type 1) and rotating screw type (Type 2) structures. Multiple screw-tip end forms, upward or downward installation (A / B type), anti-rotation options, protective covers, and fully customized stroke lengths allow the NDM screw jacks to integrate seamlessly into a wide range of industrial systems.

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Features

• Heavy load capacity: 1–100 tons
• Worm-gear mechanism with strong self-locking safety
• Two structure types: Translating screw or rotating screw
• Multiple screw-tip end forms (cylindrical, flange, threaded, flat-head, etc.)
• Optional anti-rotation protection (F-key, square guide)
• Optional protective covers (Z-steel tube, X telescopic tube, O double protection)
• Upward/downward installation direction: A / B
• Shaft direction options: A / B / C
• Customizable stroke lengths
• High mechanical efficiency and stable output torque
• Suitable for individual lifting or synchronized multi-jack systems

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NDM Series Basic Parameters Table

(Recreated in English based on catalog layout)

Basic Parameters

Type	NDM1T	NDM2.5T	NDM5T	NDM10T	NDM15T	NDM20T	NDM30T	NDM50T	NDM75T	NDM100T
Max Load (kN)	9.8	24.5	49	98	147	196	294	490	735	980
Screw Rod OD (mm)	20	25	40	55	65	85	120	130	150	180
Screw Bottom Diameter (mm)	15	18	31	44	52	67	102	112	128	155
Screw Lead (mm)	5	5	6	10	12	16	16	16	18	20
Ratio i	6	6	6	24	29	32	38	31	31	34
Rated Input Speed (rpm)	20	20	20	20	20	20	20	15	15	15
Efficiency (%)	21	21	21	13	11	9	9	9	8	8
Max Input Power (kW)	0.47	1.06	2.36	3.78	5.17	8.18	13.39	13.37	22.63	—
Allowable Radial Load (N)	127	247	480	973	1745	2816	4973	7245	8790	13019
Allowable Axial Load (N)	290	408	613	1260	2459	4630	8355	12772	16000	19000
Max Input Shaft Torque (Nm)	3.6	6.9	12.3	20.3	39.8	56.6	69.0	89.5	124.5	153.5
Input Torque (No-Load) (Nm)	0.18	0.26	0.48	0.74	1.25	1.55	1.85	2.3	3.1	3.79
Max Screw Speed (rpm)	720	600	500	200	200	150	150	100	100	100
Screw Max Load Torque (Nm)	290.1	465.1	813.2	1287.7	2513.9	5551.3	8021.8	10783.9	—	—

Material: Carbon steel screw & common steel pipe
Lubrication: Grease, splash lubrication
Cooling: Natural cooling
Ambient temperature: –10°C to +90°C

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Highlights

• Strong self-locking performance ensures lifting safety during power loss
• Modular design with extensive customization possibilities
• Capable of synchronized lifting through mechanical linkage or motorized control
• Heavy-duty construction for demanding industrial environments
• Reliable operation with minimal maintenance requirements
• Multiple installation and screw-end interface options to match any equipment

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Application

• Industrial lifting platforms and automated workstations
• Metallurgy, mining, and heavy-processing equipment
• Stage lifting, theater platforms, and motion-control structures
• Solar tracking and renewable-energy positioning systems
• Mechanical presses, valve actuators, and adjustable tooling
• Automated production lines requiring precise height control
• Conveyor height adjustment and synchronized multi-jack lifting
• Bulk material handling and loading systems