|
Aero-Motive
Reels, Balancers |
|
Coffing Hoists
Hoists, Hoist
Repair |
|
CM Hoists
Chain
Hoists, Wire Rope, Ratchet Levers, Trolley
|
|
Conductix
Power and Data Transfer Systems |
Demag
Overhead Cranes
Hoists and Winches Gearmotors
Ergonomic Systems |
|
Duff-Norton Mechanical
Actuators, Rotary Unions, Electromechanical Actuators |
|
Equipto
Storage Systems |
|
Hilman Rollers
Riggers Sets |
Harrington Hoists
Chain & Wire Hoists |
|
Joyce/Dayton
Jacks, Actuators |
|
Lyon
Tool Storage, Locker Units
|
|
Perfecting Coupling |
|
Ram-Pac
Hydraulic Tools
|
Stanley Bostitch
Pneumatic Tools, Fasteners
|
Simplex
Jacks and Braces |
|
In-Plant Offices, Mezzanines
|
 |
| |
|
Machine
Screw Jacks
250 Pound Capacity |
|
| Model
Number |
WJ250 |
|
| .pdf
Drawing (Acrobat Reader Required) |
View .pdf
Drawing |
|
| Lifting
Screw Diameter (Inches) |
1/2 |
|
| Thread
Pitch/Lead |
.125 PITCH
STUB ACME |
|
| Worm Gear
Ratio |
5:1 |
|
| Worm
Shaft Turns For 1" Travel |
40 |
|
| Maximum
H.P. @ Worm RPM |
.03 |
|
| Operating
Torque* (Inch Lbs.) @ Worm RPM |
.018W* @ 500
RPM |
|
| Screw
Torque** (Inch Lbs.) |
.050 W* |
|
| Efficiency
Rating % Approx. |
23.0 |
|
| Basic
Jack Weight (Lbs.) |
1.2 |
|
| Add to
Basic Jack Weight (Lbs.) For Each Additional 1" Of Travel |
.08 |
|
Important:
Series DWJ may lower under load. External locking
systems are required.
*W = load in pounds.
* Operating torque: torque required for a given load increases
as speed decreases.
** Screw torque is the force required to keep the screw form
rotating. |
|
|
|
