Right Angle Helical Geared Motor

The G Series right-angle helical-bevel geared motor combines a high-efficiency three-phase electric motor with a 3-stage gearbox that turns power transmission by 90°. Featuring two helical gear stages and one high-precision bevel gear stage, this series delivers high torque density, smooth operation, and energy efficiency.

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Product Overview

Designed for demanding mechanical transmission tasks, the range covers 0.12 to 200 kW motor power, gear ratios from 1.26 up to 33,000, and output torque reaching up to 50,000 N·m.

Technical Specifications

Item	Range / Configuration
Motor Power	0.12–200 kW
Transmission Ratio	1.26–33,000
Maximum Output Torque	Up to 50,000 N·m
Shaft Arrangement	90° Perpendicular Output
Gearbox Frame Sizes	GK39 – GK189
Output Shaft Type	Solid / Hollow / Shrink Disc
Mounting Options	Foot / B5 Flange / B14 Flange / Shaft-Mounted / Torque-Arm
Gear Material & Accuracy	20CrMnTi alloy steel, Carburized & Ground to ISO/DIN Class 6
Efficiency Rating	≥ 94%
Ambient Temperature	-10°C to +40°C

Performance Advantages

90° Space-Saving Layout: Perpendicular output allows compact machine positioning where inline drives cannot fit.

High Efficiency & Energy Savings: Helical-bevel geometry maintains high mechanical efficiency across all ratios compared to standard worm-gear units.

Versatile Mechanical Interfaces: Solid, hollow, and shrink-disc shaft options allow easy integration with driven machinery.

Flexible Mounting Orientations: Available in foot, flange, shaft-mount, and torque-arm configurations.

Modular Motor Adaptability: Compatible with standard three-phase AC motors, brake motors, explosion-proof motors, and VFD-driven systems.

Industry Applications

Conveying & Logistics Systems: Belt conveyors, roller tracks, bucket elevators, pallet transfer units, automated storage/retrieval systems.

Material Handling & Hoisting: Travelling bridge cranes, slewing mechanisms, winches, heavy material lifters.

Process & Industrial Machinery: Industrial agitators, slurry mixers, rotary valves, packaging lines, plastics processing equipment.

Heavy Industrial Drives: Mining feed drives, wastewater treatment scrapers, paper mill machinery, automated production lines.

Gearbox Construction & Advanced Metallurgy

Gear Material & Metallurgy: Premium 20CrMnTi alloy steel. Gear teeth undergo carburizing, quenching heat treatment, and high-precision CNC grinding (Class 6 accuracy standard) for quiet running (below 75 dB) and minimal backlash.

Gearbox Housing: High-rigidity HT250 cast iron housing (or ductile iron for extreme torque models) absorbs vibration and ensures precise shaft alignment under maximum load.

Sealing & Bearings: High-quality SKF/FAG or equivalent tier-1 bearings; double-lip NBR or FKM oil seals prevent fluid leakage and dust contamination.

Modular Interface: Flexible combination options allow direct coupling to standard IEC motors, servomotors, or custom hydraulic drives.

Mechanical Interface Details

Solid Shaft

Ideal for coupling, sprocket, or timing belt drive setups.

Hollow Shaft (Keyed)

Direct insertion onto the machine's drive shaft to eliminate extra couplings.

Shrink Disc (GKH)

Mechanical interference fit providing backlash-free clamping on smooth driven shafts.

Step-by-Step Gearmotor Selection Guide

Follow this 7-step process to correctly size your right-angle drive system:

Define Target Speed: Establish required output RPM at the driven shaft.
Calculate Working Torque: Determine required continuous operating torque in N·m.
Determine Ratio: Divide motor speed (1400 RPM at 50Hz) by target output RPM.
Evaluate Service Factor: Factor in operating hours/day, shock levels, and hourly start frequency. Ensure gearbox maximum torque capacity exceeds working torque multiplied by service factor.

Verify External Shaft Loads: Ensure radial load from pulleys/sprockets does not exceed published limits.
Confirm Physical Dimensions: Check mounting center height, flange diameter, shaft diameter, and physical footprint.
Specify Motor Parameters: Select voltage (380V/415V/460V), frequency (50/60Hz), IP rating, brake options, or VFD compatibility.

Customization Capabilities

Custom shaft extensions (metric or inch dimensions)

Special motor integration (Brake motors, Encoder feedback, Forced-cooling fans, Explosion-proof ATEX)

Surface treatments: Anti-corrosion epoxy paint coatings for marine or chemical environments

Key Factory Quality Checks

Gear Accuracy: Tooth profile runout, pitch error, and gear mesh alignment using CNC gear measuring centers.
Operational Performance: 100% testing for vibration velocity, acoustic noise level (dB), oil sealing integrity, and temperature rise.
Electrical Checks: Motor winding resistance, insulation breakdown test, high-potential (Hi-Pot) test, and current balance.

Packaging & Export Logistics

Heavy-duty export-standard plywood cases compliant with ISPM-15 heat-treatment standards.
Shaft ends protected with anti-rust oil sleeves and plastic caps.
Full shipping documentation package provided: Packing List, Commercial Invoice, Factory Test Certificate, and Certificate of Origin (CO).

Frequently Asked Questions

Q: Can you select the right model if I only know my machine speed and power?

A: Yes. If gear ratio or torque isn't fully calculated, submit your driven machine speed, power, application type, and daily duty cycle. Our drive engineers will complete the selection for you.

Q: Is motor power enough to confirm a gearbox frame size?

A: No. Output torque, radial shock loads, service factor, and daily run time are equally crucial to ensure the gearbox achieves its calculated service life without tooth fatigue or shaft shearing.

Q: When should I choose a shrink disc connection over a standard keyway?

A: A shrink disc is ideal for heavy shock loads, reversing drives, or applications requiring zero rotational backlash and easy removal without shaft fret corrosion.

Q: How do you handle external radial loads from pulleys or sprockets?

A: We calculate external radial force (Fr) based on pitch diameter and drive element factors. If radial loads exceed standard gearbox bearing capacities, reinforced heavy-duty bearings or oversized shaft options are specified.

Q: Can 2D/3D CAD drawings be provided prior to placing an order?

A: Yes. Dimensional outline drawings (PDF) and 3D CAD models (STEP) are provided during technical evaluation so your design team can integrate the drive into your machine layout before ordering.

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