Crab Type Hoist
The Crab Type Hoist is an integrated assembly of the hoist mechanism and cross-travel trolley mounted on a common structural crab frame. It runs on the top flanges of two girders in a double girder crane configuration. The crab design provides independent control of hoisting and cross-travel drives, delivering superior lifting precision and safety for heavy-duty crane systems.
Key Specifications
| Parameter | Details |
|---|---|
| Capacity Range | 5 MT to 200 MT |
| Hoist Type | Wire rope, grooved drum type |
| Cross-Travel | Motorised, dual rail, flanged wheel |
| Frame | Fabricated MS structural crab frame |
| Rope Falls | 2/4/8 falls as per load requirement |
| Braking | Electro-hydraulic thruster brake on hoist and CT |
| Control | Master controller / Pendant / Wireless / Operator cabin |
Technical Advantages
- Dedicated Crab Frame — In-house fabricated MS crab frame ensures perfect drive alignment on the girder and eliminates structural flex under heavy loads
- Independent Braking — Separate electro-hydraulic thruster brakes on hoisting and cross-travel provide smooth, controlled stopping with zero shock load
- Ultra-High Capacity — 4/8 fall rope reeving configuration supports very heavy capacities well beyond 50 MT for ladle and transformer applications
- Stress-Relieved Housing — Gear box housings stress-relieved after fabrication and machined on horizontal boring machine for precise bearing alignment
- Modular Construction — All major components — hoist unit, CT drive, crab frame — are modular for easy on-site maintenance and replacement
- Multi-Control Options — Compatible with master controller, pendant, wireless remote, and operator cabin for all crane configurations
Applications
- Steel plants
- Power stations
- Fabrication yards
- Shipbuilding units
- Engineering workshops