Regal Rexnord
Inline Gearboxes
Regal Rexnord inline gearboxes are precision - engineered speed reducers in which the input and output shafts share a common centerline — delivering high efficiency, compact length, and a quiet, balanced running characteristic ideal for mixers, pumps, compressors, and general industrial drives where axial alignment between the prime mover and driven machine simplifies installation and improves drivetrain dynamics.Under the Grove Gear, Hub City, and Browning brands, our inline gearbox portfolio spans fractional to high - horsepower capacities, reduction ratios from under 2: 1 to over 1, 500: 1, and configurations ranging from economical single - reduction helical units to multi - stage planetary and helical - cycloidal designs that pack extreme torque multiplication into minimal space.Plant engineers and machine designers choose Regal Rexnord inline gearboxes when the application’s shaft layout naturally places the motor and driven machine in -line — vertical mixers, pump drives, extruders — and the priority is the highest possible efficiency per gear stage to minimize heat generation and energy cost.With foot, flange, and shaft - mount mounting options; solid, hollow, and keyless - shrink - disc output connections; and the ability to accept NEMA and IEC motor inputs directly or via C - face adapters, our inline gearboxes provide the configuration flexibility to optimize any co - axial drive layout.
Send an Enquiry
We'll get back to you on WhatsApp.
Trusted by Industry Leaders
98 % + Per - Stage Efficiency(Helical)
Precision - ground helical gearing minimizes sliding friction and heat generation, maximizing the percentage of motor power delivered to the load and reducing cooling requirements.
Planetary Design for Maximum Torque Density
Inline planetary gearboxes pack multiple planet - gear contacts into a compact diameter, delivering higher torque capacity per unit volume than any other gear configuration for robotics, machine tools, and mobile equipment.
C - Face & IEC Motor Input Adaptability
Input flanges accept NEMA and IEC motors from any manufacturer, allowing motor sourcing flexibility and simplifying field motor replacements without adapter plates.
Solid, Hollow & Shrink - Disc Output Options
Solid shaft for coupling connections, hollow bore for direct shaft mounting, and keyless shrink - disc connection for high - torque, zero - backlash shaft attachment without keyways.
Low Backlash Versions for Positioning
Precision - ground, low - backlash(<5 arc - min) inline planetary gearboxes for CNC machine axis drives, robots, and antenna positioning where angular precision is critical.
Factory - Filled Synthetic Lubrication
Filled for life with synthetic gear oil for most mounting positions, eliminating field lubrication requirements and the early - life failures caused by incorrect lubricant selection.
Inline vs.Right - Angle Gearboxes: When Coaxial Drives Are Optimal
The choice between an inline(coaxial) and right - angle gearbox often comes down to drivetrain layout and space efficiency.Inline gearboxes are the natural choice when the motor and driven shaft are already aligned — vertical pump drives, agitators mounted above the vessel, and extruders where the motor is behind the screw — because they avoid the additional cost and efficiency loss of a bevel - gear turn.Inline helical gearboxes also achieve the highest efficiency per stage, making them the preferred choice for continuous - operation drives where energy cost matters.Right - angle gearboxes(helical - bevel, worm) are chosen when space constraints force the motor to be positioned perpendicular to the driven shaft, or when a 90° mechanical offset simplifies the machine layout.Regal Rexnord application engineers evaluate the available space, shaft layout, and efficiency priorities to recommend the optimal gearbox architecture, free of single - technology bias.
Inline Planetary Gearboxes for Servo & Precision Drives
In servo - driven positioning applications — pick - and - place robots, CNC machine axes, and automated guided vehicles — the gearbox must provide high torque multiplication with near - zero backlash to maintain positioning accuracy and control - loop stability.Regal Rexnord inline planetary precision gearboxes achieve this with hardened, profile - ground planetary gears and output bearing systems rated for the high tilting - moment loads common in robotic arm and rotary - table applications.The coaxial design maintains the motor and load on the same centerline, simplifying machine structure and avoiding the geometric compensation required with right - angle drives.With standard industry mounting patterns that accept every major servo - motor brand, low - inertia designs that maximize servo responsiveness, and IP65 - rated sealing for washdown and dirty environments, our precision inline planetary gearboxes form the reliable motion - transmission backbone of advanced automation systems.