SJB series Screw Jack

The SJB series mechanical screw jacks are designed with ball screw for high speed, high frequency and excellent performance. Main components: high precision ball screw, high precision worm gears and worm wheel. Easy mounted with IEC standard asynchronous motors.

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Product Description

Application of SJB screw jack: ascending and descending of flat slab, height adjustment of surface machining tool, inclination pitch adjustment of conveyor apron.

Features:

Small size, light weight, simple operation, easy maintenance, long life
Lifting force(KN) :from 5 to 500
Ball screw type(SJB)
Screw Jack top fitting shape:R type(Cylindrical shape),T(flange shape),S(screw shape),H(flat shape)
Two structure:rotating screw in upright and inverted type(screw rotating,Nut moving along axial direction)

translating screw in upright and inverted type(screw rotating and moving along axial direction)

Two mounting type:

A type:lead screw (nut) moving up direction

B type:lead screw (nut) moving down direction

Screw shaft protection:

with protection(P)

With anti-rotation(F)

Typical Model Data

Model		SJB10	SJB20	SJB50	SJB80	SJB100	SJB200	SJB300
Max Lift Force(KN)		10	20	50	80	100	200	300
Screw Specs		Tr20*5	Tr32*5	Tr40*7	Tr50*10	Tr63*10	Tr80*10	Tr100*20
Gear Ratio	V1	1:4	1:6	1:7	1:8	1:8	1:8.75	1:10.25
Gear Ratio	L1	1:16	1:24	1:28	1:32	1:32	1:32	1:95
Stroke per input 1RPM (mm)	V1	1.25	0.83	1.43	1.25	1.25	2.28	0.488
Stroke per input 1RPM (mm)	L1	0.31	0.21	0.36	0.31	0.31	0.58	0.39
Max Input Power (KW)	V1	0.57	1.14	2.2	2.5	3	4	7
Max Input Power (KW)	L1	0.27	0.55	1.1	1.5	2.2	3.5	5.5
Start Torque when Full Loading (Nm)	V1	4.8	8.2	34.4	36.8	49	53.2	157
Start Torque when Full Loading (Nm)	L1	1.8	3.4	14.6	15.3	20.4	23.4	66.7
Efficiency when Start	V1	0.41	0.32	0.33	0.32	0.32	0.31	0.3
Efficiency when Start	L1	0.27	0.2	0.2	0.20	0.20	0.18	0.18
Efficiency when 1500RPM	V1	0.59	0.58	0.59	0.58	0.58	0.55	0.53
Efficiency when 1500RPM	L1	0.42	0.39	0.39	0.39	0.39	0.35	0.35
Gearbox Weight (kg)		6	9.5	23	38	62	78	125
Weight per adding 100mm acme screw (kg)		0.5	0.8	1.6	2.5	3.2	4.6	7.3

SJB Screw Jack System Solution: