Double Girder Crab Hoist

Overview

Double Girder Crab Hoist

Model	Working Load (Tons)	Track Gauge (mm)	Lift Height (m)	Reeving	Speed (m/mm)	FEM
CLHD 05	5t	1250	6, 9, 12	4/1	1 ~4	2M
		1400
CLHD 10	7.5t	1250			1.2~4.7
		1400
		1800
	10t	1250			1.2~4.7
		1400
		1800
	15t	1400	6, 8, 12	6/1	0.8~3
		1800
		2240
CLHD 16	16t	1400	8, 12, 16, 20. 24, 30	4/1	1.2~4.7	2M
		1800
		2240
	25t	1800	8, 10, 12, 16, 20	6/1	0.75~3
		2240
		2800
		3200
CR20	30	1800	6.7, 10, 13.3	6/1	0.6 ~2.47	2M
		2240
		2800
CR20	32	1800
		2240
		2800
CR32	40	2240	8, 12, 16, 20, 24	4/1	0.9 ~3.7	2M
		2500
		2800
		3200
		3800
CR32	50	2500	8, 10.6, 13.3, 16	6/1	0.6 ~2.47	2M
		2800
		3200
		3800
CR32	62	2500
		2800
		3200
		3800

Features

• Modular in construction with flexibility on falls interchange (4/1), (6/1).
• Light weight and comparably less headroom.
• Two Travel machinery directly drives the wheels, avoid the connection failure and transmission loss.
• Acceleration and deceleration by inverters to increase the life span of the components.

Safety

• Rope safety factor >= 5
• Motor over heating protection with thermistor.
• Double limit switch for up and down travel movement.
• Precise and accurate closed loop overload protection system (via.) VFD.
• Reliable load clamping by safety latch.

Technical Advantages

• Lifting height : 6m, 8m, 9m, 12m, & 16m.
• Double rail crab standard track gauges of 1250, 1400, 1800, 2240 mm.
• Designed to meet the FEM duty cycle.
• End carriage is designed to suit standard Wheel block with double side mounting.
• Dual cross travel drives are made as a standard supply for cross travel movement of trolley, across R-Series crab hoist models.
• Modular in construction and standard parts like wheel blocks are used to reduce the risk of assembly.

Technology

1. Gear Box
2. Rope Drum
3. Rope Guide
4. Rope
5. Hook Block
6. Rotary Limit Switch Equipment
7. End Tie Assembly
8. Cross Travel Machinery
9. Hoisting & Travel Motor
10. Wheel

Specifications

Standard Specifications

Capacity Range (Tons)	5t to 63t
Classification	FEM 2m , 3m , 4m
Lifting Speed(m/min)	0.6~5 M/Min Frequency Controlled
Travel Speed(m/min)	5~20; Freqency Controlled
Power Supply	415Volts, 3 Phase, 50 Hz, AC Supply
Control Supply	24 Volts, 50 Hz, DC Supply Frequency Controlled
Ambient Temp. (°C)	50°C Max
Application	Indoor
Thermal Insulation Class	F-Class
Motor Enclosure	IP 54
Brake Type	Electromagnetic Disc Brake – DC
Hook	DIN 15400
Rope Drum	Seamless pipe rope drum grooved as per DIN 15061

Description

Gear Box

• In-house precision machined Aluminium cast body for reduced weight.
• In-house hardened and Precision ground gears for smooth running and long life.
• Gears permanently immersed in synthetic oil for quiet, smooth and cool operation.

Rope Drum

• Designed for durability and life long use.
• Constructed from a high quality seamless steel.
• Manufactured according to DIN-15061.

Rope Guide

• Heavy duty rope guide ensures positive rope scrolling.
• GGG 40 spheroidal cast iron material used to provide low wear and keeps the rope securely in the groove on the drum.
• Special guide spring is fitted between the wire rope and the guide to maintain the correct tightness of the rope on the drum.

Rope

• High strength Wire Rope provides high resistance to fatigue and wear.
• Compact strand structure and highly flexible steel core rope for long life.
• High wire rope / pulley diameter ratio increases the rope life span.
• Selected according to ISO 4308-1.

Hook Block

• Robust design for improved safety and handling.
• Rotating hook and pulley block with safety latch.
• High strength forged steel hook capable of 360 degree rotation.
• Machined sheave grooves for long rope life.
• Designed according to DIN-15400.

Rotary Limit Switch Equipment

• Automatic cut-off of the lifting and lowering motions in upper and lower limit positions.
• Cut-off position can be adjusted to suit the application.
• Provides Upper/Lower motion limit switch as standard option.

End Tie Assembly

• Mechanical Overload protector is used as standard option to prevent lifting excessive overloads.
• Pre-set springs are mounted for rated load.
• Electronic load measure used as optional.

Cross Travel Machinery

• Travel machinery is specially designed for hoist application.
• Easy to remove without removing wheels.
• Case hardened and Precision ground gears for smooth running and long life.
• Gears permanently immersed in oil/grease for quiet, smooth and cool operation.
• Standard travelling speeds of 20 m/min (single speed) and 20/5 m/min {double speed) at 50Hz. Other travelling speeds can be also fitted upon request.

Hoisting & Travel Motor

• Heavy duty motor with an incorporated brake and fan cooled.
• The brake disc lining material is asbestos free with high friction coefficient and long lasting.
• Provided with IP 54 enclosure rating and F insulation class.
• On request we can provided with IP55 or IP 56 enclosure rating with H Class insulation.
• Thermistors fitted on windings of the motor for protection of windings in high temperature.

Wheel

• Single flanged wheels for monorail hoist and double flange for crab hoist.
• The wheels are totally machined, and made of spheroidal cast material SG-700/2.
• Ball / Spherical Roller / Taper Roller bearings are used for high life.
• Modular design to suit different mounting positions.
• Easy removal and maintenance.