Chain Pulley Block
BRAD
Balanced Spur Gear Hand Chain Hoists are offered in capacities in the range from 0.5 Tonne to 5 Tonne.
FRAME:
Made from MS Rolled Steel Plates. A detachable cover totally encloses the gears.
CHAINS:
Load chains are of Alloy Steel Grade 80 to International standards.
HOOKS:
Forged alloy steel hook rotates on balls housed in top / bottom block assembly.
GEARS:
Heat-treated alloy steel pinions and case hardened spur wheels.
LOAD WHEEL :
Made from Spheroidal Graphite Iron.
BEARINGS:
Load spur wheel mounted on Needle Roller Bearings.
BRAKE:
The brake is of automatic screw and discs type.
CHAIN GUIDES :
Steel chain guide roller provided
HAND CHAIN WHEEL :
Pockets accurately cast to receive calibrated hand chain. Hand chain wheel cover prevents chain from snagging and fouling.
Technical Specifications
Capacity (Safe Working load) | Tonnes | 0.5 | 1.0 | 1.5 | 2.0 | 3.0 | 5.0 |
Number of falls of load chain | 1 | 1 | 1 | 2 | 2 | 2 | |
Test Load | Tonnes | 0.75 | 1.50 | 2.25 | 3.00 | 4.50 | 7.50 |
Dimensions | |||||||
A Hook suspension | mm | 280 | 300 | 360 | 380 | 470 | 600 |
Hung in Trolley | mm | 384 | 404 | 490 | 510 | 605 | 755 |
B | mm | 142 | 142 | 178 | 142 | 178 | 210 |
C | mm | 126 | 126 | 142 | 126 | 142 | 165 |
Hung in trolley | |||||||
Track width Range-I | mm | 75-125 | 75-125 | 80-140 | 80-140 | 80-150 | 100-150 |
Track width Range-II | mm | 140-180 | 140-180 | 150-210 | 150-210 | 180-210 | 180-210 |
Minimum clear depth of track | mm | 125 | 125 | 150 | 150 | 150 | 200 |
Built-in Units | |||||||
Track width Range-I | mm | 80-110 | 80-110 | 100-140 | 100-140 | 100-140 | 125-150 |
Track width Range-II | mm | 125-180 | 125-180 | 150-210 | 150-210 | 150-210 | 180-210 |
Minimum clear depth of track | mm | 150 | 150 | 200 | 200 | 200 | 250 |
Minimum radius of track curve | m | 1.5 | 1.5 | 2.0 | 2.0 | 2.0 | 2.5 |
Weight: Hook Suspension unit for clear lift | Kg | 10.5 | 11 | 16 | 15.5 | 24 | 36 |
Additional weight for extra lift | Kg | 1.7 | 1.7 | 2.3 | 2.5 | 3.7 | 5.3 |
Weight: Geared Trolley with chain for standard 3mm clear lift. | Kg | 23 | 23 | 37 | 37 | 42 | 81 |
Effort on hand chain to raise SWL | Kg | 16 | 32 | 37 | 32 | 38 | 42 |
Velocity ratio (movement of hand chain to load chain) | 40 | 40 | 52 | 80 | 104 | 160 |