JWM Series Worm Screw Jack

Short Description:

JWM series worm screw jack (Trapezoid screw)


JWM (trapezoidal screw) is suitable for low speed and low frequency.

Main components: Precision trapezoid screw pair and high precision worm-gears pair.

1) Economical:

Compact design, easy operation, convenient maintenance.

2) Low speed, low frequency:

Be suitable for heavy load, low speed, low service frequency.

3) Self-lock

Trapezoid screw has self-lock function, it can hold up load without braking device when screw stops traveling.

Braking device equipped for self-lock will be of malfunction accidentally when large jolt & impact load occur.

Product Detail

Product Tags


Original modular design, biomimetic surface with owned intellectual property right.
Adopt German worm hob to process the worm wheel.
Low friction, long lifecycle, high efficiency.
Diverse drives, motor or other power drive, also can be driven by hand.
Various output type.

Main applied for

Hoist and transport
Building and construction
Forest and paper
Metal processing
Agriculture and food

Technical Data

Housing material Cast iron/Ductile iron
Housing hardness HBS190-240
Gear material 20CrMnTi alloy steel
Surface hardness of gears HRC58~62
Gear core hardness HRC33~40
Input / Output shaft material 42CrMo alloy steel
Input / Output shaft hardness HRC25~30
Machining precision of gears Accurate grinding, 6~5 Grade
Lubricating oil GB L-CKC220-460, Shell Omala220-460
Heat treatment tempering, cementiting, quenching, etc.
Efficiency 98%
Noise (MAX) 60~68dB
Vibration ≤20µm
Backlash ≤20Arcmin
Brand of bearings China top brand bearing, HRB/LYC/ZWZ/C&U. Or other brands requested, SKF, FAG, INA, NSK.
Brand of oil seal NAK — Taiwan or other brands requested

How to order

Jwm Series Worm Screw Jack (6)

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