Pfaff-Silberblau ZWW Wall-Mounted Rack & Pinion Jack (Heavy Duty)

Model ZWW | Capacity 1,500 to 10,000 kg | Lift 565 to 800 mm | Wall-Mounted | Sifeku or Siku Crank | German Engineered

The Pfaff-Silberblau ZWW is the heavy-duty wall-mounted rack and pinion jack, scaling the ZWW-L design to capacities 1,500 to 10,000 kg. Used for lifting, lowering, pulling, and pushing heavy loads from a permanent mounting position. Standard tensile load operation; compressive (pushing) available on request. Rack lengths 975 to 1,240 mm with lift 565 to 800 mm. Sifeku safety crank (1.5-5 t) or Siku crank (10 t). Improved corrosion protection (zinc plating, special coating of rack) available for marine, outdoor, and aggressive industrial environments.

Technical Specifications

Compressive operation available on request. Improved corrosion protection (zinc-plated or special-coated rack) available for all ZWW capacities. Symmetrical toothing available on request. Custom rack lengths available.

Key Features

• Heavy-duty wall-mounted design: Scales ZWW-L design to 10,000 kg, fixed-position industrial heavy lifting.
• Sifeku safety crank (1.5-5 t): Spring-loaded retainer prevents accidental crank disengagement.
• Siku crank (10 t): Standard 360° rotation for the largest ZWW 10000.
• Robust steel construction: Precision-machined worm and spur gears, solid steel rack, hardened gearing parts.
• Improved corrosion protection option: Zinc-plating or special coating for marine and aggressive environments.
• Custom rack lengths and symmetrical toothing: Available on request for specific applications.

Suitable Applications

Heavy-duty wall-mounted jack for industrial fixed-position lifting. Applications: industrial maintenance and machinery installation, shipbuilding (deck plate alignment, hull section positioning), steel structure assembly, sluice gate auxiliary drives, rail heavy lifting, offshore installation, marine engineering.

How to Use the Pfaff-Silberblau ZWW Wall-Mounted Rack & Pinion Jack (Heavy Duty)

1. Select correct ZWW model: Match capacity (1500/3000/5000/10000 kg) to load.
2. Mount the jack: Bolt to rigid wall or structure rated for WLL plus safety factor.
3. Connect to load: Rack bore hole for yoke, eye bolt, or shackle. Consider dynamic forces.
4. Fit crank: Sifeku (1.5-5 t) or Siku (10 t) per the model.
5. Operate: Steady rotation. Hand effort 28 daN (1.5-5 t) or 40 daN (10 t).
6. Hold position: Load brake + Sifeku spring retainer provides positive load holding.
7. For S24 worm gear: Bolt-on accessory adds 24:1 reduction, self-locking, recommended for 5 t and 10 t.

Warning: Wall mounting must support WLL plus dynamic effects, critical for 10 t. ZWW 10000 requires 40 daN, plan for two operators or specify Worm Gear Drive S24.

Safety Information

• Always inspect the jack before each use (base plate, rack, gear housing, crank).
• Never exceed the Working Load Limit stamped on the jack body.
• Use only the manufacturer-approved crank, never with extension bars or mechanical drives.
• Never use on soft ground, ice, or unstable surfaces.
• Never side-load, angle-load, or use the jack to lift persons.
• For sustained load support, place additional supports beside the jack before any work beneath the load.
• LOLER 1998 thorough examination required every 12 months where used as lifting equipment.
• Wall mounting structure must be rated for WLL plus safety factor, especially for 10 t.
• ZWW 10000 requires 40 daN at WLL, plan for two operators or use S24 Worm Gear Drive.
• For aggressive corrosion environments, specify improved corrosion protection option.

Inspection and Maintenance

Lubricate worm and spur gears every 6 months under heavy duty (annually under normal use). Use gear oil ISO VG 220. Inspect rack, gearbox, mounting bolts, and crank at each LOLER. Inspect Sifeku spring for fatigue. WOLFF Onsite provides LOLER inspection.

Optional Accessories

• Pfaff Cranks: Sifeku (1.5-5 t) and Siku (10 t) replacement cranks.
• Pfaff Worm Gear Drive S24: Bolt-on for 24:1 reduction with self-locking action. Recommended for ZWW 5 t and 10 t.
• Improved corrosion protection: Zinc-plating or special coating of rack for marine and aggressive environments.
• Symmetrical toothing and custom rack lengths: Available on request.
• Compressive load configuration: Standard is tensile; compressive available on request.
• Motor drive integration: Three-phase motor drives with manual emergency override available.

Downloads

• Pfaff ZWW Catalogue Reference (EN) , refer to Pfaff Hoisting catalogue for ZWW specifications. No dedicated PDF in Compass, contact us for the datasheet

Frequently Asked Questions