Screw jack cast iron
2XX-STWorm gear screw jacks convert a rotary motion into a linear
motion. BJ-Gear A/S supply worm gear screw jacks in four versions: with rotating trapezoidal spindle, with stagnant
trapezoidal spindle and rotating nut, with rotating ball screw
and with stagnant ball spindle and rotating nut.
BJ worm gear screw jacks are very sturdy in terms of overload
and operating environment. The design is compact, simple and
its modular construction allows great flexibility. The modular
design is also ideal if customisations are needed.
If higher speed and loads are needed, we have extensive
experience in adapting or designing special solutions.
More Information
Description
Worm gear screw jacks with trapezoidal spindle
Worm gear screw jacks with trapezoidal spindle are primarily used when relatively slow axial speed is needed and/or when
the compact design of the worm gearbox is of advantage. A standard worm gear screw jack with trapezoidal spindle ensures
a tensile and compression force of up to 40,000 N and a linear speed of up to 2,800 mm/min.
Worm gear screw jacks with ball screw spindle
A worm gear screw jack with ball screw spindle provides advantages over the trapezoidal spindle in relation to efficiency,
speed, precision and running time.
By using a standard worm gear screw jack with ball screw spindle, you can achieve a linear speed of up to 25,000 mm/min.
Since the ball screw has a very high efficiency, it will limit the accumulation of heat in the spindle and nut. That makes the
ball screw suitable for continuous operation.
Running-in and maintenance
Running-in:
The lifetime of the gearbox is increased by careful running-in. The first running time should not exceed 30 minutes, and it is necessary to make time for cooling before the next start. When doing the first running-in, it is important to take the duty factor into consideration. The load of the gearbox is gradually increased from half to full output torque.
Maintenance of spindles:
A certain time for running-in must be expected. It is recommended to protect the spindle with e.g a bellow (see illustration in the downloadable catalogue). Due to the generation of heat between spindle and nut, the gearboxes should not work continuously with heavy load. Also, it is important that spindles and nuts are kept clean and well-lubricated by using a quality spindle grease. All data are based on clean and well-lubricated spindles. With daily operations the spindle should be checked weekly and lubricated as required. With fewer running hours, monthly checks are sufficient.
Downloads
