Regal Rexnord
Shaft Mount Gearboxes
Regal Rexnord shaft mount gearboxes are purpose - engineered speed reducers that mount directly onto the driven shaft — eliminating couplings, baseplates, laser alignment, and the floor - space allocation that conventional gearbox installations require.This direct - mount architecture, pioneered and refined by the Falk Drive One and Rexnord / Browning brands, uses a hollow output bore with a patented Torque - Assist(TA) tapered bushing that grips the driven shaft with a shrink - fit - equivalent clamping force, transmitting full torque without keys or keyway stress risers.Aggregate plant operators, conveyor system designers, and process - industry engineers specify Regal Rexnord shaft mount gearboxes when they need to install a drive in a remote, difficult - to - access location — crusher discharge conveyors, screen feed conveyors, and bucket elevator head shafts — where the installation simplicity, compact footprint, and maintenance accessibility of a shaft mount design dramatically reduce both initial installation time and ongoing service labor.Available in parallel shaft and right angle configurations, screw - conveyor adaptations with integral thrust bearings, and a range of ratios covering the requirements of virtually every belt conveyor and bucket elevator application, our shaft mount gearboxes embody the practical, field - proven design that has made them the default specification for thousands of aggregate, mining, and bulk - material - handling drives worldwide.
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Trusted by Industry Leaders
Direct Shaft Mount Eliminates Alignment
Gearbox slides onto the driven shaft and is anchored by a torque arm — no coupling, no baseplate, no laser alignment — reducing installation time from days to hours and eliminating the most common source of industrial drive vibration.
TA Tapered Bushing for Secure Shaft Grip
Hydraulically - installed, mechanically - retained taper bushing provides a keyless connection with shrink - fit clamping force, eliminating the fretting and keyway fatigue failures of keyed - shaft connections.
Compact Footprint for Space - Constrained Locations
Direct mounting on the driven shaft reduces the drive package length by eliminating the coupling and motor base area, fitting into the tight spaces at conveyor head and tail stations.
Torque Arm & Turnbuckle Anchoring
Simple torque - arm restraint reacts the gearbox torque to an adjacent structure, with adjustable turnbuckle for precise belt or chain tensioning without moving the gearbox.
Screw Conveyor Adaptation With Thrust Bearings
Shaft mount gearboxes with integral high - capacity thrust bearings and C - face motor adapters designed specifically for direct - mount screw conveyor drive service.
Backstop & Hold - Back Availability
Integral mechanical backstop clutches that prevent the dangerous and costly reversal of loaded belt conveyors and bucket elevators on power interruption.
Shaft Mount Gearbox Installation & Field Service Advantages
The field - service advantages of shaft mount gearboxes become most apparent during replacement.A traditional foot - mounted reducer requires uncoupling the motor, unbolting the reducer from its baseplate, removing and reinstalling the coupling hub, and then re - aligning the entire drivetrain — a process that often consumes a full maintenance shift.A shaft mount gearbox, by contrast, is removed by releasing the TA bushing and torque arm, sliding the old unit off the shaft, and sliding the new unit on.With the TA bushing’s hydraulic installation, the new gearbox is securely locked to the shaft in minutes.Belt tension is restored by adjusting the torque - arm turnbuckle.The entire replacement can often be completed in under four hours — frequently during a single planned outage — versus the multi - day downtime of a conventional replacement.For operations where unplanned downtime costs exceed tens of thousands of dollars per hour, this rapid replacement capability can be the single most valuable attribute of the drive.
Shaft Mount Gearboxes for Aggregate & Mining Conveyors
Aggregate and mining operations run conveyors in the most punishing environments in industry — driving rain, dust that becomes abrasive paste when wet, freeze - thaw cycles that shift foundations, and shock loads from 1 - ton - plus rocks dropped onto the belt.Regal Rexnord shaft mount gearboxes thrive in this environment because their direct - mount design accommodates the shaft deflection and structural movement that would destroy the alignment of a foot - mounted reducer.The Falk Drive One series has earned its reputation as the industry standard in aggregate, with case -carburized gearing, oversized bearings, and a dual - seal system that keeps out the fine, abrasive dust characteristic of quarry and mine operations.For these applications, the combination of reliable alignment - free mounting, proven sealing, and the long service life of Falk gearing makes shaft mount gearboxes the lowest - total - cost drive solution over the 20 - to 30 - year life of a typical aggregate conveyor.