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Electric jackscrews main structures include a screw jack and a motor. Screw jack includes self-locking acme threads screw jack, high accuracy ball screw and ball nut screw jack, high speed bevel gear screw jack. Motor includes high precision servo motor, low rpm gear motor or worm gear speed reducer, high rpm 3-phases or single phase ac electric motor and brushless dc motor. 

Normally, using 3 / 1 phase ac motor matching screw jack with 300 ~ 1800 mm/min lifting speed. Need low speed electric jackscrews, using with gear reduction mechanism low rpm gear motor or worm gear speed reducer with less than 300 mm/min lifting speed. Need high duty cycle or high speed electric jackscrews, using ball screw jack with motor. Need super high speed electric jackscrews, but low duty cycle, using high speed bevel gear screw jack with motor, etc.

Electric Jackscrews Features:
1. Customized lifting speed.
2. Customized screw jack load capacity.
3. Customized lifting screw stroke.
4. Customized motor input voltage, phase, hz.
5. Matching limit switches, easy to control stroke.
6. Matching inverter, multi-stages to control stroke.
7. Matching encoder, controlled precisly stroke.
8. Matching brake, avoid lifting screw creep.
9. Multi-units synchronizing lifting, PLC system easy to control.
10. Instead of human beings, save cost and improve output efficiency. 

Electric Jackscrews Calculation Formulas:

Power Calculation Formulas
P=(LxS) / (6120xη)

P: required power (kw)
L: total equivalent load (kg)
S: travel speed (m/min)
η: efficiency

Torque Calculation Formulas
T=9550 x P/R

T: required torque (N.m)
P: input power (kw)
R: input speed (rpm)

Output Speed Calculation Formulas
R=R1 / I

R: gear motor or gear reducer output speed (rpm)
R1: electric motor speed (rpm)
I: gear reduction ratio of gear motor or gear reducer

Lifting Speed Calculation Formulas
V=R x P/i

V: lifting speed (mm/min)
R: input speed (rpm)
P: lifting screw pitch (mm)
i: worm gear reduction ratio

Travel Length Calculation Formulas
L1= P/i

L1: travel length per turn of input shaft
P: lifting screw pitch (mm)
i: worm gear reduction ratio




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