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JAMALPUR JACK
Special Features
The Jamalpur Jack has a capacity to lift a load of 25
Tonnes and four such Jacks make one complete set with a
total lifting capacity of 100 Tonnes. These Jacks can be
operated simultaneously or individually.
The Jamalpur Jacks have been gaining in popularity chiefly
due to low initial capital investment and minimum
maintenance needs. It is worthwhile to mention that the
performance and cost factor of these Jacks have posed a
serious challenge to capital intensive Electrical Overhead
Traveling Cranes.
Besides Indian Railways, these prestigious Jamalpur Jacks
have been operating successfully at various steel plants
and allied industries.
Construction Features
The Jack is rigid and robust. The upright column is
fabricated and welded to the cast steel Gear Box. The
elevating screw is provided with buttress thread supported
with single-acting thrust ball-bearing having a spherical
seating at the top and self-aligning ball-bearing at the
bottom. This imparts self-aligning properties to the screw
under loaded condition. The elevating screw is under
tension when loaded and hence there is no chance of
distortion due to buckling.
While lifting the load, the Jack rests firmly on its base.
For movement from one place to another, the lifting
carriage is to be lowered by pressing the yoke which lifts
the base and the Jack rests on the three wheels with a
ground clearance of 20 mm.
Utility
Jamalpur Jacks have been designed for:
-
Lifting Diesel/Electric Loco for inspection and
maintenance.
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Wheeling and de-wheeling in Sheds/Workshops/C&W
Depot.
-
Various other lifting purposes with suitable
adaptors.
Specification:
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TYPE—1 |
TYPE—2 |
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To Suit lifting of Diesel Engine Loaded Wagons
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To suit lifting of Carriage
(ICF,BEML etc.)
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1. |
Individual Capacity |
25 Tonne
|
15 Tonne
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2 |
Total
capacity
for
one
set
(consisting of 4
Jacks) |
100
Tonne
|
60
Tonne |
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3 |
Total
lift
of claw |
1342 mm
|
1370 mm
|
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4 |
Maximum claw height
from
ground level |
2127mm
|
2000mm
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5 |
Minimum claw height from
ground level
|
785
mm
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630 mm
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6 |
Claw Projection
from
Centre of beam.
|
538
mm
|
690
mm
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7 |
Ground Clearance
when resting on wheels |
20
mm
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20 mm
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8 |
Hoisting speed |
200 mm
per minute (Approx) |
200
mm
per minute (Approx)
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9 |
Net weight of one Jack |
1.5 Tonne
(Approx) |
1.5 Tonne(Approx)
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10 |
Overall Dimensions |
2781 mm x
l22Ommx 1048mm |
2781 mm x
l22Ommx 1048mm |
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11 |
Nature of drive & Power Supply: |
Power for the lifting screw is obtained from a
specially designed
motorized Gear Box with worm drive. A 5 H.P. Squirrel
Cage,
totally enclosed, fan-cooled, horizontally
foot-mounted,
380/415V, 3 phase, 50HZ Brake Motor is directly
placed over
the Gear Box for Power Transmission through a Chain
Drive. |
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