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Lim-Tec widely used

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电话

Tel：010-87757706/87757858

Fax：010-87757857

Contact Address：Tongzhou District of Beijing the North off fluent Road north 5 km

SJB Series ball screw

　　The patented external shape design-unique rectangle fluted housing of the screw jack increases the heat-dissipation ability of the housing and extend the lifetime of the lubricant etc. The material of ductile cast iron raises the hardness and increase the efficiency and the wide application in low or high temperature environment of the housing. The design of the rectangle rear tube prevents the screw
　　from self-rotating and the safety nut offers a guarantee to the security of the screw jack and monitors the wear degree of the nut.The advanced manufacturing equipments and assembling technique ensures the high quality of the products, leading designing concept creates superior products featuring in the strong shock-load resistance, high duty cycle, low noise, long lifetime and small size.
　　Modularized combination enriches the matches of the products, the random combination between the actuator and the motor, and the special functional accessory provides thousands of choices to the customer.
　　Complete accessories: bellow, anti-backlash design, safety nut, ball screw, limit switch, overload clutch, potentiometer, encoder, brake, hand-wheel, mounting accessories.

Features：

Linear speed： up to 75mm/s
Input speed：1800rpm
Stroke：up to 6.5m
Precise positioning :0.02mm/300mm
Uniform lifting speed
Quick, sure operation
with Ball screw and unself-locking function
Operating duty cycle up to 50% over a 10 minute period (normal:30%)

Product parameters

Size SJB10 SJB20 SJB21 SJB22 SJB50 SJB51 SJB80 SJB81 SJB100 SJB101 SJB200 SJB201 SJB300

Max lifting

load [kN]

 10 20 20 20 50 35 60 60 80 70 90 100 150

Dynamic

load

 11 17 25 25 46 30 53 56 71 62 78 97 111
Screw dia x pitch [mm] 20×5 32×5 32×10 32×20 40×10 40×20 50×10 50×20 63×10 63×20 80×10 80×20 100×20

Worm

ratio

 V1 1.4 1.6 1.6 1.6 1.7 1.7 1:8 1:8 1:8 1:8 1:8.75 1:8.75 1:10.25
L1 1:16 1:24 1:24 1:24 1:28 1:28 1:32 1:32 1:32 1:32 1:35 1:35 1:41
Stroke for one input turn [mm] V1 1.25 0.83 1.67 3.34 1.43 2.86 1.25 2.5 1.25 2.5 2.28 2.28 1.95
L1 0.31 0.21 0.42 0.84 0.36 0.72 0.31 0.62 0.31 0.62 0.58 0.58 0.488
Max input power [kW] V1 0.57 1.14 1.14 1.14 2.2 2.2 2.5 2.5 3 3 4 4 7
L1 0.27 0.55 0.55 0.55 1.1 1.1 1.5 1.5 2.2 2.2 3.5 3.5 5.5
Max starting torque at full load [Nm] V1 4.8 8.2 15.3 29.2 34.4 47.4 36.8 72.3 49.0 82.9 53.2 118 157
L1 1.8 3.4 6.3 12.1 14.6 19.4 15.3 29.9 20.4 34 23.4 52 66.7
Starting efficiency V1 41 32 35 36 33 34 32 33 32 34 31 31 30
L1 27 20 21 22 20 21 20 20 20 21 18 18 18
Torque withoutload [Nm] V1 59 58 62 65 59 60 58 59 58 60 55 55 53
L1 42 39 42 44 39 41 39 40 39 41 35 35 35
Housing material Spheroidal graphite iron
Weight [kg] 6 9.5 9.5 10 23 24 38 40 62 64 78 78 125

Weight per 100mm
screw & protective

tube [kg]

 0.5 0.8 0.8 0.8 1.6 1.6 2.5 2.5 3.2 3.2 4.6 4.6 7.3