SLEW DRIVE
Elecon slewing gear units of planetary as well as bevel-helical type (conventional) are available in various sizes ranging from 1.5 kW and reduction ratio ranging from 400 to 1000.
These gear units are especially designed for the slewing mechanism of the stacker-reclaimer machines.
The planetary gear units normally have four-stage reductions out of which the first stage is designed as helical or bevel pair, and the remaining stages according to planetary gear systems.
The conventional gear unit consists of five to six reduction stages comprising bevel and helical gear pairs.
The sun and planet gears are case-hardened and ground to quality 6 as per DIN 3961/63. The annulus is made up of high tensile alloy steel, heat treated or nitrated depending upon power requirement. The spiral bevel gears in case of conventional gear units are case-hardened and lapped in pair so as to ensure optimum tooth contact pattern during assembly. The casing is of welded construction mainly in three parts in case of planetary gear unit and in two parts in case of conventional gear unit. The bearing bores are machined with high degree of accuracy on CNC machines.
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