Hollow Shaft Bevel Helical Geared Motor
The Hollow Shaft Bevel Helical Geared Motor integrates high-efficiency helical and bevel gear stages into a heavy-duty right-angle transmission. Its hollow output bore slides directly onto the driven machine shaft, eliminating external couplings, sprockets, and alignment brackets.
Product Overview
The Hollow Shaft Bevel Helical Geared Motor integrates high-efficiency helical and bevel gear stages into a heavy-duty right-angle transmission. Its hollow output bore slides directly onto the driven machine shaft, eliminating external couplings, sprockets, and alignment brackets. Designed as a direct drop-in replacement compatible with major European and international standards, this drive delivers high torque density in restricted installation spaces.
Technical Specifications
|
Parameter |
Specification & Range |
|
Product Type |
G Series Hollow Shaft Bevel Helical Geared Motor |
|
Gear Design & Precision |
Helical + Bevel stages; 20CrMnTi alloy steel, carburized & hardened (HRC 58-62), ground to DIN Class 6 |
|
Housing Material |
High-strength HT250 cast iron with internal ribbing for maximum rigidity |
|
Transmission Angle |
90° right-angle drive |
|
Gearbox Sizes |
37, 47, 57, 67, 77, 87, 97, 107, 127, 157, 167, 187 |
|
Motor Power Range |
0.12 kW to 200 kW (0.16 HP to 270 HP) |
|
Reduction Ratio |
5.36 to 179.86 (Up to 32,625 in multi-stage combined configurations) |
|
Output Speed |
0.1 rpm to 280 rpm |
|
Output Torque |
Up to 50,000 Nm |
|
Hollow Shaft Bore |
Ø20 mm to Ø120 mm (Custom imperial/metric bores available) |
|
Motor Electricals |
3-Phase AC, 220V/380V/415V/440V/480V/690V, 50/60 Hz, IEC standard flange |
Application Scenarios
Belt & Unit Conveyors: Compact right-angle drive sits flush against conveyor frames, saving aisle footprint in warehouses.
Roller Conveyor Systems: High torque output drives heavy pallet chains and live roller transport lines smoothly.
Bulk Material Handling: Heavy-duty cast iron housing handles shock loads in bucket elevators and screw feeders.
Packaging & Bottling: Smooth speed variation matches precise indexing, filling, and capping machinery cycles.
Agitators & Mixers: Optional heavy-duty bearings support elevated axial forces from liquid mixing impellers.
Gearbox Size and Model Selection
Follow these engineering steps to size the correct unit:
Output Speed: Determine machine operating speed in rpm.
Reduction Ratio = Motor Input Speed / Required Output Speed
Required Torque: Calculate continuous operational torque.
Torque (Nm) = 9550 * Power (kW) / Output Speed (rpm)
Service Factor: Multiply calculated torque by the application service factor based on operating hours, load uniformity, and start/stop frequency.
Frame Sizing: Match calculated torque against gearbox rating tables to select the appropriate G Series frame.
Bore & Mounting: Confirm hollow shaft bore diameter, keyway dimensions, and mounting orientation (M1 to M6).
Motor Options: Specify voltage, frequency, IP rating, brake torque, VFD compliance, or thermal protection.
Motor and Electrical Configurations
Voltage & Frequency
Multi-voltage windings (230/400V, 290/500V, 400/690V at 50Hz; 260/460V, 330/575V at 60Hz).
VFD Duty
Inverter-duty windings with reinforced phase insulation for 10:1 or 20:1 constant torque speed ranges.
Brake Motors
C electromagnetic spring-set safety brakes with manual release lever and adjustable braking torque.
Thermal Protection
PTC thermistors or bimetallic PT100 switches integrated directly into stator windings.
Auxiliary Options
External forced-cooling supply fans (220V single-phase or 380V three-phase) for prolonged low-speed operating cycles.
Mounting and Mechanical Installation
To ensure smooth operation and long service life, verify the following prior to installation:
- Machined tolerance alignment between machine shaft and hollow bore hub.
- Keyway dimension verification according to DIN 6885/1 standard.
- Free application of anti-fretting paste to shaft connections before mounting.
- Proper installation of the torque arm with rubber bushing buffer to absorb peak shock reaction forces without rigid binding.
- Correct breather valve positioning based on chosen orientation (M1, M2, M3, M4, M5, or M6).
Quality Control
Every gearbox undergoes controlled processing and test routines before dispatch:
Gear Tooth Processing: 20CrMnTi alloy steel carburized, quenched to HRC 58-62, and precision ground to ISO Class 6 profile accuracy for low noise and minimal backlash.
Housing Machining: CNC machining center processing guarantees tight bearing seat concentricity and precise shaft axis perpendicularity.
100% Factory Inspection & Testing:
- Gear tooth mesh contact pattern and backlash verification
- Hollow bore and keyway dimensional tolerance check
- No-load run testing for operating noise, vibration, and temperature equilibrium
- Pressurized oil seal leak checks
- Motor winding insulation resistance and high-pot testing
Export Packaging & Overseas Logistics
All shipments are prepped for international ocean, air, and multimodal transport:
Machined hollow bores, shafts, and unpainted mounting surfaces receive heavy-duty rust inhibitor coating.
Sealed internal VCI vapor-corrosion film wrapping with desiccant packs.
ISPM-15 compliant fumigation-free plywood cases with internal shock cushioning.
Outer labeling with CE markings, gross weight, center of gravity points, and shipping line marks.
Frequently Asked Questions
Q: Are your hollow shaft gearboxes directly interchangeable with SEW K-Series?
A: Yes, our G-Series (GK Series) matches the mounting dimensions, shaft centerlines, hollow bore sizes, and output flange dimensions of standard European brands.
Q: What is your standard warranty period?
A: We provide an 18-month warranty from the shipping date or 12 months from installation, backed by global technical support.
Q: How quickly can CAD files and quotes be provided?
A: 2D drawings and 3D STEP models are generated within 12 hours, with formal commercial quotations sent within 24 hours.
Q: What hollow bore connection types do you offer?
A: Standard keyed hollow shafts (DIN 6885/1), keyless hollow shafts for shrink disc connection, and splined hollow shafts (DIN 5480).
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