Product Category

Helical Gearbox

Hardened helical gear motors for efficient inline and parallel shaft drives. Rated from 0.18kW to 160kW with foot or flange mounting, stocked at our NR Road showroom for plants across Bangalore and pan-India dispatch.

Products in Stock

Helical gear motors
and configurations

We stock R-series foot-mounted units, RF flange-mounted drives, single-stage RX units and RM agitator gearboxes. Share your power, ratio and mounting details for a stock check.

Power and ratio vary by model

R Series Foot Mounted

Standard inline helical gear motors for general duty.

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Power and ratio vary by model

RF Series Flange Mounted

Flange output for agitators and compact machine builds.

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Power and ratio vary by model

RS Solid Shaft Input

Foot-mounted units with solid shaft input configuration.

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Power and ratio vary by model

RX Single Stage

Compact single-stage helical reducers.

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Power and ratio vary by model

RXF Flange Single Stage

Flange-mounted single-stage helical units.

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Power and ratio vary by model

RM Agitator Gearbox

Purpose-built agitator drives for process tanks.

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Power and ratio vary by model

Brake Motor Package

Helical units paired with brake motors where holding is required.

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Power and ratio vary by model

Explosion-Proof Options

Special motor builds on request for classified areas.

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Build Sheet

Helical gear motor
specification

Cast iron housings with hardened helical gears. Electric motor, solid shaft or IEC/NEMA flange inputs available across the range.

R Series Helical

Rated power

0.18kW to 160kW

Max. torque

Up to 18000 N.m

Gear arrangement

Hardened helical gears

Shaft position

Inline or parallel

Ratio

1.3 to 289.6

Installation

Foot or flange mounted

Housing

Cast iron

Input options

Electric motor, solid shaft, IEC or NEMA motor flange

Models

R, RS, RF, RFS, RX, RXS, RXF, RXFS, RM

RX / RXF series model ratings

Single-stage helical units. Foot-mounted (RX) and flange-mounted (RXF) variants.

Swipe horizontally to view all columns

Models	Output Shaft Dia.	Input Shaft Dia.	Power (kW)	Ratio	Max. Torque (Nm)
RX/RXF38	20mm	16mm	0.18-1.1	1.6-3.76	20
RX/RXF58	20mm	19mm	0.18-5.5	1.3-5.5	70
RX/RXF68	25mm	19mm	0.18-7.5	1.4-6.07	135
RX/RXF78	30mm	24mm	1.1-11	1.42-5.63	215
RX/RXF88	40mm	28mm	3-22	1.39-6.44	400
RX/RXF98	50mm	38mm	5.5-30	1.42-5.82	600
RX/RXF108	60mm	42mm	7.5-45	1.44-6.65	830
RX/RXF128	75mm	55mm	7.5-90	1.56-6.47	1110
RX/RXF158	90mm	70mm	11-132	1.63-6.22	1680

R / RF series model ratings

Multi-stage helical gear motors. Foot-mounted (R) and flange-mounted (RF) variants.

Swipe horizontally to view all columns

Models	Output Shaft Dia.	Input Shaft Dia.	Power (kW)	Ratio	Max. Torque (Nm)
R/RF18	20mm	-	0.18-0.75	3.83-74.84	85
R/RF28	25mm	16mm	0.18-3	3.37-135.09	130
R/RF38	25mm	16mm	0.18-3	3.41-134.82	200
R/RF48	30mm	19mm	0.18-5.5	3.83-176.88	300
R/RF58	35mm	19mm	0.18-7.5	4.39-186.89	450
R/RF68	35mm	19mm	0.18-7.5	4.29-199.81	600
R/RF78	40mm	24mm	0.18-11	5.21-195.24	820
R/RF88	50mm	28mm	0.55-22	5.36-246.54	1550
R/RF98	60mm	38mm	0.55-30	4.49-289.6	3000
R/RF108	70mm	42mm	2.2-45	5.06-245.5	4300
R/RF138	90mm	55mm	5.5-55	5.51-223.34	8000
R/RF148	110mm	55mm	11-90	5.00-163.46	13000
R/RF168	120mm	70mm	11-160	8.77-196.41	18000

Authorised Dealer

TransVLL
and drive brands

Helical gear motors from TransVLL and allied brands with documentation for industrial buyers and OEMs.

Authorised Dealer

TransVLL

Gear motors and industrial drive packages

View Brand

Authorised Dealer

Bonfiglioli

Helical and planetary drive systems

View Brand

Authorised Dealer

Fenner

Power transmission and gearbox solutions

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Authorised Dealer

Lubi

Motors and pumps for industrial plants

View Brand

Buying Guide

How to choose
a helical gearbox

Power, output speed and mounting style are the three decisions that narrow the correct R-series model.

Foot mount or flange mount?

R and RX series suit foot-mounted bases. RF and RXF units mount via output flange for agitators and vertical arrangements. Confirm your machine interface before ordering.

Single-stage or multi-stage?

RX and RXF cover single-stage ratios for higher output speeds. R and RF multi-stage units deliver larger ratios and torque for heavier drives.

Which motor pairing?

We support single-phase, three-phase, brake, inverter and multi-speed motors. Share supply voltage, duty and starting method so we quote the correct motor flange or solid shaft input.

Industries

Where helical drives
are used

Helical gear motors are the default choice for efficient continuous duty across Indian industry.

Cement and mining

Mills, conveyors and crusher auxiliaries.

Steel and metal processing

Roll tables, coil handling and finishing lines.

Automotive supply chain

Press lines, conveyors and paint shop drives.

Food and beverage

Mixers, cookers and hygienic process equipment.

Chemical processing

Agitators, pumps and reactor auxiliaries.

Material handling

Belt drives, bucket elevators and screw conveyors.

Paper and packaging

Winders, slitters and folder gluer lines.

Water and utilities

Clarifiers, aerators and pump drives.

Applications

Typical
helical drive jobs

From agitators to conveyors, helical units cover the majority of fixed-speed industrial drives.

Agitator and mixer drives

RM and RF units on process tanks and blending vessels.

Belt conveyor drives

Foot-mounted motors on bulk handling lines.

Extruder and calendar rolls

Torque-dense drives on rubber and plastics machinery.

Crusher and feeder auxiliaries

Slow-speed high-torque applications in mining and cement.

Hoist and winch mechanisms

Brake motor packages on lifting and pulling equipment.

Cooling tower and fan drives

Reliable reduction on HVAC and process air systems.

Machine tool power feeds

Compact RX drives on auxiliary machine motions.

OEM equipment builds

Standard ratios for machinery manufacturers and integrators.

FAQ

Helical gearbox
questions

Common questions on R-series helical gear motors before you place an order.

R/RF168 models deliver up to 18000 N.m as per the manufacturer rating table. Share your application duty so we confirm service factor and frame size.

Yes. Inverter-rated motors can be paired with helical gearboxes on request. Specify your VFD brand and speed range when enquiring.

We carry popular RX and RXF frames for higher output speeds. Call with your ratio and shaft sizes to confirm current stock.

R series are foot-mounted with solid shaft output. RF series use a flange-mounted output suited to agitators and similar equipment. Input options are otherwise similar.

Yes. Pan-India dispatch is available from NR Road. Provide frame size, ratio and mounting for a same-day stock confirmation where possible.