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Ball Screw Jack

The SJB ball screw lift features a high quality square shell, and is equipped with a ball screw rod, guaranteeing the high transmission efficiency, precision and long service life. The service life of the screw lift is directly dependent on the service life of both the ball screw rod and the spare parts, such as the worm gear. Keep both of those working as designed, and the SJB ball screw lift will continue to work as required. The ball screw lift does not have a self-locking function, so we advise adding a brake to ensure the equipment's security.

Applications

These screw lifts are widely used in:
· Transmission units and digital control execution of machinery
· Roller motion devices in metallurgy
· Steel ladle lifting, turning over and movement transmission units in areas people can't go
· Lifting units and automatic or remote control opening/closing of large windows and doors
· Sluice gate opening in water conservation applications
· Large, flexible clamping, transposition tooling, welding robots
· Remote radar and solar energy sensing
· Medical equipment
· Lifting units on lift stages and in the automobile industry

Screw Lift Parameters
Model SJB10 SJB20 SJB21 SJB22 SJB50 SJB51 SJB80 SJB81 SJB100 SJB101 SJB200 SJB201 SJB300
Max. Lift Force (KN) 10 20 20 20 50 35 60 60 80 70 90 100 150
Rated Dynamic Load (KN) 11 17 25 25 46 30 53 56 71 62 78 97 111
Screw diameter x lead (mm) 20x5 32x5 32x10 32x20 40x10 40x20 50x10 50x20 63x10 63x20 80x10 80x20 100x20
Worm Gear 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
Screw stroke/ 1 R of worm input (mm) V1 1.25 0.83 1.67 3.34 1.43 2.86 1.25 2.5 1.25 2.5 1.14 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 0.29 0.58 0.488
Max. In/out 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. start torque with full load (Nm) V1 4.8 8.2 15.3 29.2 34.4 47.4 36.8 72.3 49 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
Start Efficiency V1 0.41 0.32 0.35 0.36 0.33 0.34 0.32 0.33 0.32 0.34 0.31 0.31 0.3
L1 0.27 0.21 0.21 0.22 0.2 0.21 0.2 0.2 0.2 0.21 0.18 0.18 0.18
Rotating efficiency at 1500rpm V1 0.59 0.58 0.62 0.65 0.59 0.6 0.58 0.59 0.58 0.62 0.55 0.55 0.53
L1 0.42 0.39 0.42 0.44 0.39 0.41 0.39 0.4 0.39 0.41 0.35 0.35 0.35
Box Material Modular Cast Iron
Box Weight (kg) 6 9.5 9.5 10 23 24 38 40 62 64 78 78 125
Screw rod +protective tube weight per 100mm (kg) 0.57 0.8 0.8 0.8 1.6 1.6 2.5 2.5 3.2 3.2 4.6 4.6 7.3
Features

1. The highest push speed reaches 77mm/s, due to the screw lift's high efficiency and low heating.
2. High efficiency: There are multiple balls between the screw shaft and nut. They carry out a rolling motion in order to reduce friction, and thus, increase the efficiency.
3. Stroke range: 6.5m
4. Standard screw lift precision levels are 0.02mm. The ball screw rod is produced using advanced Taiwanese production technology, and the milling, assembly, inspection and temperature/humidity working condition procedures are all strictly controlled. The use of an outstanding quality management system also guarantees the precision.
5. No backlash, high rigidity: The ball screw rod can ensure the radial backlash is a negative value due to pre-compression. By adding pressure to the balls, the repulsion of the balls enhances the rigidity of the hut when the screw lift is being used for mechanical devices.
6. Micro feeding: Because the screw rod starts using a ball motion, the starting torque is small with no scrambling, which ensures a precise micro-feeding.
7. Absolute mechanical synchronization, high precision, stable transmission.
8. High impact resistance
9. Rolling and precise ball screw lift are available

Accessories:

· Safety nut
· Ball screw rod imported from Taiwan
· Dust cover
· Anti-Backlash design
· Limit switch
· Overload clutch
· Potentiometer
· Encoder
· Brake
· Hand crank

This type of screw lifter is most often used in applications that require highly precise, and high quality automatic equipment. The working temperature is -20°- 40°C, though we do offer -40°- 70°C upon customer requests. We offer a double and three screw lead, with the lift speed proportionally increasing based on the number of screw leads.

Details

1. The SJB screw lift uses a special square groove housing in order to enhance the heat radiation ability of the shell and extend the service life of the grease.
2. The shell is made of nodular cast iron, which significantly improves the tensile strength and performance of the shell. It also extends the application range under both high and low temperatures.
3. A square rear cover ensures the screw rod does not automatically rotate when it does not need to.
4. A safety nut design monitors wear conditions of the screw lift and eliminates any hazards.

Download

SJB spiral screw lift parameters
Spiral screw lift in Chinese and English

Inquiry Form

Add: No. 4777, North Jiasong Road, Jiading District, Shanghai, China-201804
Tele: +86-21-69009655 69009656
Fax: +86-21-69009657
Mobile:
+86-15900414247 (Ms.Jessica Gan)
+86-18602189255 (Mrs.Lusia Cai)
Email:
servo-gearbox@foxmail.com
tqgmotor@hotmail.com
fhtgearbox@hotmail.com
Skype: fht-gearbox@outlook.com
Skype: lusialsz
WhatsApp:008615900414247
WhatsApp:008618602189255
Wechat: tq15900414247
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