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Which jacks require a brake motor?
Firstly, let’s see self-locking. Self-locking is a term used to describe jacks that require power to move in either direction. They hold their position when power to the system is off. Machine Acme Screw Jacks having gear ratios between 20:1 and 32:1, are self-locking and, in the absence of vibration, will hold loads without backdriving. In the case of large shocks, the self-locking function of th...
May 21 , 2015 view more
When to use Bevel Gear Jack?
The most common classification of screw jack is trapezoidal and ball lift. Compared to these two types, the bevel gear screw jack are relatively less used, but it also has many advantages.Then what are the advantages of the bevel gear jack system? Let’s see the following. Worm Gear Screw Jack includes acme screw jack and ball screw jack. Acme screw jack with self locking, low duty cycle, internal ...
Aug 05 , 2014 view more
How to choose suitable screw jack?
If you need screw jacks or screw jack system,but not sure about the details.What should you do? Donot worry. Just refer to the five questions below and come back to us with the answers.Then we will help you choose suitable model and make drawing for your confirm. Q1: The lift capacity is ? Kg (it means how many Kilos or KN the screw jack need to lift) The screw’s travel stroke is ? mm (it means th...
Oct 23 , 2013 view more
How a Screw Jack Works
A screw jack is a gearbox assembly (either worm gear or bevel gear) and a transmission product (lead screw, ball screw or roller screw) which through use of a motor is used to convert rotary into linear motion. They can be used to push, pull, tension, lock, unlock, tilt, pivot, roll, slide and lift or lower loads, anything from a few kilos to thousands of tonnes. Screw jacks are essential componen...
Jul 05 , 2013 view more
Worm Gear Machine Screw Jacks Machine Screw Jacks - 1/4 Ton to 100 Ton & 5 kN to 200 kN
The Inch and Metric Worm Gear Machine Screw Jacks incorporate an alloy or stainless steel worm which drives a high strength bronze worm gear (drive sleeve). The worm shaft is supported on anti-friction tapered roller bearings with external seals provided to prevent loss of lubrication. The drive sleeve is supported on anti-friction tapered roller or ball thrust bearings. Rotation of the drive slee...
Jun 29 , 2013 view more
Construction of a Slewing Ring
1, Internal ring 2, External ring Slewing Ring consist of an internal and external ring with an integrated raceway system and optional internal or external teeth. The normal material is 50Mn. 3, Roller In Slewing Rings, better rotation and loading transmission are achieved by special design and precision production of the rolling elements. 4, Spacer Spacers separate the rolling elements and minimi...
Mar 06 , 2013 view more

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