Front-left three-quarter view of a black brushless automatic sliding door motor with silver gearbox and cable connector

Cleanroom Equipment Spare Parts

Automatic Door Motor

A compact brushless DC gearmotor assembly that converts controlled low-voltage drive into quiet timing-belt motion for an overhead automatic sliding cleanroom door operator.

Single Brushless DC Motor
Integrated Reduction Gearbox
Toothed Belt-Drive Pulley
Keyed Five-Wire Connection

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Product Introduction

This automatic door motor is a replaceable mechanical drive module for overhead pedestrian sliding-door operators. One black cylindrical brushless motor is coupled to a silver die-cast reduction gearbox, which delivers usable door-driving torque through a single toothed timing pulley. The zinc-plated L bracket provides four fixed mounting points, while the terminated cable harness carries the motor and feedback conductors to the separate operator controller. The assembly contains no door logic board, sensor or mains power supply, keeping motor replacement distinct from controller service.

Key Features

The brushless commutation architecture avoids carbon-brush wear and supports smooth acceleration during frequent opening cycles.

A compact right-angle reduction stage lowers output speed and increases pulley torque without extending the drive assembly along the operator rail.

The black toothed pulley provides positive engagement with the operator timing belt and reduces slip during reversing movement.

A keyed low-voltage harness and four-hole galvanized bracket provide repeatable electrical orientation and rigid mechanical location during replacement.

Customer Product Concerns

A replacement door motor must match the operator's electrical feedback, pulley geometry, reduction ratio and mounting datum; similar-looking generic motors are not automatically interchangeable.

An incompatible pulley pitch or tooth count can produce belt noise, lost motion or premature tooth wear.The single toothed output pulley is selected against the existing operator belt profile and aligned on the original drive plane.

A motor with the wrong feedback conductors may run unpredictably or fail to report position to the door controller.The keyed five-wire harness is matched by pin function and supply requirements before it is connected to the existing control module.

Bracket distortion or shifted hole positions can misalign the motor and overload the reduction bearings.The rigid four-hole L bracket locates the gearmotor at a repeatable height and keeps the output shaft square to the belt path.

Replacing the motor cannot correct controller, sensor or door-track faults that impose excessive load.Drive current, carriage movement, belt condition and controller commands are checked separately so the motor module addresses the actual failed function.

Typical Applications

Automatic sliding cleanroom personnel doorsGowning-room and airlock sliding entrancesLaboratory overhead door operatorsControlled production-suite sliding doors

Technical Parameters

The following conservative ranges describe compact low-voltage brushless gearmotor modules commonly fitted inside pedestrian automatic sliding-door operator headers.

Core Material	Copper-wound laminated electrical-steel motor core with permanent-magnet rotor and hardened-steel reduction gears
Panel Thickness	65-95 mm nominal motor-shell diameter
Effective Width	85-135 mm nominal gearbox and mounting-bracket width
Maximum Length	Up to 280 mm overall gearmotor length excluding relaxed cable bend
Steel Facing Thickness	2.0-3.0 mm nominal zinc-plated mounting-bracket thickness
Core Density	Approximately 7650-7850 kg/m³ for representative electrical-steel laminations
Thermal Conductivity	Approximately 45-55 W/(m·K) for representative electrical-steel core material
Surface Finish	Matte-black coated motor shell, natural-silver die-cast aluminum gearbox and zinc-plated steel mounting bracket
Joint Type	Brushless motor-to-reduction-gear coupling with single keyed timing pulley, four-hole L bracket and keyed five-wire harness
Customization	Available based on the intended application and operating environment.

Available Options

Motor voltage and feedback matched to the existing controllerTiming-pulley tooth profile and bore selectionLeft- or right-oriented cable exitMounting bracket drilled to the operator datum

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