Screw Jacks feature cubic shape.
Press Release Summary:
January 24, 2005 - Series S Metric Screw Jacks feature finned sections which faciliate heat dissipation in gearbox. Oil lubricated gearbox ensures full lubricant contact with gear teeth to minimize wear and aid cooling. Flexible design allows mounting access from 2 sides to position screw jack at any angle, eliminating need for conventional upright and inverted screw jack variants. Three gear ratios with 2 lifting screw leads cover range of linear travel rates.
Original Press Release
Power Jacks 'S-Series' Range of High Duty Screw Jacks
Press release date: January 22, 2005
a) Increased surface area with cubic shape and finned sections allows better heat dissipation of the heat built up in the gearbox.
b) Increased mass due to cubic shape increases thermal capacity above conventional worm gearbox housings.
c) Oil lubricated gearbox to ensure full lubricant contact with gear teeth to reduce wear and to aid cooling. The increases in surface area and mass were all calculated to the optimum point for the available foot print for each screw jack size. This balance of area and mass is critical as both can detrimentally affect the thermal performance. In general, tests showed that the "S-Series" screw jacks had a 50% higher duty cycle than conventional worm gear screw jacks, irrespective of the lifting screw type in the unit. Other benefits built into the design are improved flexibility for different linear travel rates, mounting arrangements for the screw jack, and accessory attachment mounting. The cubic gear box housings flexible design allows mounting access from two sides to position the screw jack at any angle, this eliminates the need for the conventional upright and inverted screw jack variants. This reduces both Power Jacks and the customers' product variants in stock and in service. To satisfy more applications with standard product there is the choice of 3 standard gear ratios with two different lifting screw leads, covering a multitude of linear travel rates, in translating (ST) or rotating (SR) screw form. As with all screw jacks from Power Jacks the "S-Series" can be driven individually, with a range of standard motor adapters bolted direct to the gearbox housing, or in multiple jack arrangements using standard power transmission solutions from Power Jacks.