Overview
The Transtecno CMB series helical bevel gearmotors deliver high efficiency right angle power transmission in a compact, lightweight aluminium package. Designed around the principle of modularity, the CMB range is built to be completely interchangeable with the established CM worm gearbox series, which means you can swap between helical bevel and worm gear configurations without redesigning your mounting layout or drivetrain.
Available in four sizes (402, 502, 633, and 903), the CMB range covers nominal output torques from 40 Nm through to 500 Nm. Whether you are running poultry feeding lines, livestock conveyor systems, or general material handling equipment, the CMB gives you the performance benefits of helical bevel gearing with the flexibility to match your exact application requirements.
Every unit in the series features a diecast aluminium housing that keeps weight down while providing excellent corrosion resistance. The ground hardened helical gears run quieter and more efficiently than traditional worm gear sets, and the permanent synthetic oil lubrication (viscosity grade 320) means you can install these gearmotors in any mounting position without worrying about oil changes or ongoing maintenance schedules.
Key Features
The modular architecture of the CMB series is one of its biggest advantages. The housing is fully interchangeable with the CM worm gearbox range, so if your application needs change or you want to trial a different gear type, you can make that switch without altering your existing mounting points or output connections.
Configuration options are extensive. You can specify output flanges (F, FL, or FB types), solid or hollow output shafts, torque arms for reaction load support, and input flexible couplings. The units accept IEC standard motors from frame size 56 right through to 100/112, with both B5 and B14 flange options available depending on the gearbox size.
Both 2 stage and 3 stage versions are offered. The 2 stage models (CMB 402 and CMB 502) cover ratios from approximately 6:1 to 72:1, while the 3 stage models (CMB 633 and CMB 903) extend the range up to nearly 263:1 for applications requiring very low output speeds with high torque multiplication.
The permanent synthetic lubrication eliminates the need for regular oil changes and allows the gearmotor to be mounted in any orientation. This is particularly useful in agricultural and food production environments where equipment may be ceiling mounted, wall mounted, or positioned at unusual angles to suit building layouts.
Common Applications
CMB helical bevel gearmotors are well suited to a range of industries and applications across Australia. In poultry and livestock operations, they provide reliable drive solutions for screw feeders, chain feeding systems, trough lifting mechanisms, and ventilation fan drives. Their compact right angle design makes them ideal where space is tight and the motor needs to sit perpendicular to the driven shaft.
Beyond agriculture, the CMB series works well in conveyor drives, packaging lines, food processing equipment, and general industrial material handling. The aluminium housing and maintenance free lubrication make these units a practical choice for environments where corrosion resistance, low weight, and minimal downtime are priorities.
The wide ratio range means a single gearbox platform can serve applications from relatively fast output speeds (around 227 rpm on the 2 stage models) right down to very slow, high torque outputs (as low as 5.3 rpm on the largest 3 stage unit). This flexibility reduces the number of different gearbox types you need to stock or specify across a facility.
Selection Considerations
Choosing the right CMB size and configuration starts with your application torque and speed requirements. Each of the four sizes has a defined nominal output torque: 40 to 65 Nm for the 402, 70 to 125 Nm for the 502, 150 to 250 Nm for the 633, and 280 to 500 Nm for the 903. Matching these to your driven load ensures the gearbox operates within its design envelope.
The service factor is another important consideration. Transtecno recommends consulting their technical department to select the appropriate service factor based on the type of load (uniform, moderate shock, or heavy shock) and the operating hours per day. Getting this right protects the gearbox from premature wear and extends its service life.
Radial and axial load capacity should also be checked, particularly if the output shaft is driving a sprocket, pulley, or gear that introduces side loads. The maximum permissible radial loads range from 3500 N on the CMB 402 up to 9500 N on the CMB 903, with axial load capacity calculated at 20% of the radial value.
If you are currently using CM worm gearboxes and considering an upgrade to helical bevel gearing for improved efficiency, the CMB range makes the transition straightforward. The shared housing dimensions mean your existing mounting hardware, output connections, and motor adapters can be reused.
Support and Enquiries
Motordrives Australia supplies the full Transtecno CMB helical bevel gearmotor range with local stock and technical support. Whether you need help selecting the right size and ratio for a new installation, or you are looking to upgrade existing worm gear drives to higher efficiency helical bevel units, our team can assist with product selection, configuration, and delivery across Australia.
Get in touch with your application details, including required output speed, torque, motor size, and mounting orientation, and we will recommend the best CMB configuration for your needs.
