1285 Specifications

1285 Aut-o-doR Horizontal Sliding Gate Operator shall be manufactured by Crown Industrial Operators (formerly Richards-Wilcox Mfg. Co.) 213 Michelle Ct., So. San Francisco, CA 94080 Phone (650)952-5150.

Each sliding type electric operator shall be built into a compact unit mounted on a heavy hot dipped galvanized steel base. The unit shall consist of a right angle gear head instantly reversing motor, magnetic brake, heavy duty safety clutch, reversing starter with silver to silver contacts, emergency release, galvanized weather hood, limit switch to suit job conditions. The roller chain shall be minimum number 60 with an ultimate strength of 8500.

The gear head motor and magnetic unibrake shall be assembled as one unit with one stage of reduction. The geared motor shall be of all cast iron construction. Input worm shaft shall be supported on tapered roller bearings, preloaded, to accommodate frequent, rapid reversals and high motor starting torques. The input worm shaft shall be made of 8620 alloy steel, ground and polished surface with fine grain hardness carburized to Rockwell C 60, minimum. Gears are of 48 bronze high strength, low friction alloy. Motor is coupled to input worm shaft with multi-jaw coupling with resilient member for additional shock absorption when starting or reversing. Double lip oil seals on the output shaft shall operate on super finished shaft areas to assure oil retention and contaminant exclusion. Output shafts of "stress proof" 1045 alloy, minimum 100,000 psi yield shall be mounted on heavy duty tapered roller bearings. The magnetic disc type unibrake with its easily adjustable feature shall be assembled to the motor to make a compact and efficient unit.

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