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Raman lift units have been designed for special purpose of lift where silence & smoothness are of most necessary importance.
The Gear case is of high quality close grained cast iron conforming to IS 210 of high grade. Its rib design provides maximum strength & surface area for heat dissipation.
Entire design is based mainly on BS 721 to high accuracy. IS specification are used wherever necessary.
The worm is made from high quality hardened steel generated, ground & super finished. The worm wheel is made from centrifugally cast nickle phosphorbronze conforming to BS 1400 PB-2 rim fitted with cast iron centre. Sleeve bearings are used on worm shaft with angular contact ball bearings being used to take thrust.
Sleeve bearings are provided on wheelshaft for maximum load carrying capacity. Oil seals are not provided in gear boxes. All gears have limited backlash for lift operation.
Special care is taken for oil circulation so that ample quantity of oil reaches all sleeve bearing imparting longer life. These high quality units offer maximum economy with minimum maintenance & require only periodic oil checking.
We recommend hydraulic AW-320 oil. Please note all gear units are supplied without oil. FILL OIL BEFORE USE up to half level in oil indicator in unit off position.
Before starting a new gear unit or a gear unit having not used for a long time, pour the required oil up to half level in oil indicator & make complete turn of main sheave manually.
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