Rotating screw jack M/J

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Product overview
The cubic NEFF worm-gear screw jacks (types M and J) are lifting elements designed for lifting forces from 150 to 500 kN. NEFF-manufactured screw drives combined with precision worm gearboxes provide reliable lifting capacity and smooth operation.

Drive / Performance

• Drive options: trapezoidal screw or ball screw (precision-rolled or ground)
• Lifting forces: 150–500 kN
• Some sizes available with lifetime lubrication and optimized tolerances for improved efficiency
• Cubic design permits use in all mounting positions

Design types

• Type R: screw jack with rotating spindle
• Type N: classic version with continuous (lifting) spindle
• Type VK: non-rotating by square protective tube on the gearbox side
• Type VP: non-rotating by key in gearbox bearing cover and milled groove on the spindle

System / Integration
Individual screw jacks can be linked by drive shafts to build synchronized lifting systems. A comprehensive range of standard accessories supports coupling, anti-rotation solutions and installation variants.

Applications & Advantages
The cubic form factor and the available drive options make these screw jacks suitable for industrial lifting applications requiring forces in the 150–500 kN range. Design variants and accessories facilitate anti-rotation measures and multi-unit synchronized drives.

Technical specifications

• Series: M-J series (types M and J)
• Drive types: trapezoidal screw, ball screw
• Lifting force range: 150 kN to 500 kN
• Design: cubic, usable in all mounting positions
• Versions: N (continuous spindle / lifting spindle), R (rotating spindle)
• Anti-rotation options (N): square protective tube (VK) or V-groove; VP: key + milled groove on spindle
• Integration: connectable via drive shafts for synchronized lifting systems
• Accessories: extensive standard-program accessories available