Inline helical gearboxes · STM Polska
AMP and AMF inline helical gearboxes
AMP and AMF are inline helical gearboxes built around a one-piece cast housing. Meshing cylindrical gear pairs bring the motor speed down and the torque up, and the series covers 12 to 4500 Nm with drive powers from 0.03 to 88.97 kW. Ratios run from 1/2.4 to 1/301.2, so the output speed can be set to suit the process rather than corrected afterwards. Tell us the duty and we quote within one working day.
The housing is the reason this coaxial gear unit holds its parameters. Casting it in one piece keeps it stiff and stops it deforming under heavy load, so the drive keeps transmitting torque accurately. The inside of the casting is shaped to steer the oil, so every moving part is lubricated evenly: noise drops, wear slows and the unit seals better. Shafts are steel and the teeth are case-hardened and ground, which is where the quiet running and the long service life come from.
Sizing starts with the output speed and the torque the machine needs, then the ratio that gets you there. After that comes the duty: overload capacity, how often the drive starts and whether the load is steady or swings. The modular output flange gives you room to configure the drive end, which matters when the mounting space is already fixed by the machine.
The working environment decides the rest. Dust, humidity and swings in temperature point to a different sealing arrangement or a build with higher resistance, and we settle that at the quote stage rather than after a failure. Non-standard versions are available: a different shaft type, special sealing, a paint finish, or extra options such as a brake.
AMP and AMF units go on conveyors and internal transport systems, on production machinery in heavy industry, on mixers, on packing lines and in industrial automation. Send us the torque, the ratio or output speed you need and the mounting arrangement, and we size the gearbox against the real load rather than the nameplate.
Main features
One-piece cast housing resists deformation under load
Torque from 12 to 4500 Nm
Power from 0.03 to 88.97 kW
Ratios from 1/2.4 to 1/301.2 for exact output speed
Case-hardened and ground teeth, steel shafts
Modular output flange for machine integration
Specifications
- Torque
- 12 to 4500 Nm
- Power
- 0.03 to 88.97 kW
- Ratios
- 1/2.4 to 1/301.2
| Housing | One-piece casting, high rigidity under load |
|---|---|
| Gearing | Case-hardened and ground teeth, steel shafts |
| Lubrication | Housing shaped to direct oil to all moving parts |
| Output | Modular output flange for machine integration |
| Special builds | Alternative shaft, special sealing, paint finish, brake |
Applications
- Conveyors and internal transport systems
- Production machinery in heavy industry
- Mixers
- Packing lines
- Industrial automation drives
Documentation
Catalogue, ratio tables and dimensional drawings for the AMP / AMF series are sent with every quotation. Request the documentation.
Questions about the AMP / AMF series
What torque and power does the AMP and AMF range cover?
The series runs from 12 Nm to 4500 Nm, with drive powers from 0.03 kW to 88.97 kW. That spread covers light duty and heavily loaded drives from the same family, so you can standardise on one series across a plant. We work out which size you need from the output torque and speed you give us, then add the margin the duty calls for.
Which ratio do I need?
Work backwards from the output speed the machine has to run at, against the speed of the motor driving it. Ratios from 1/2.4 to 1/301.2 are available, so the step is usually fine enough to hit the figure you want. Send the input speed, the required output speed and the torque, and we confirm the ratio and the frame size together.
Why does the one-piece housing matter?
A housing cast in one piece is stiffer than an assembled one. It resists deformation when the drive is loaded, so the gearbox keeps its parameters and transmits torque accurately instead of drifting. The internal shape of the same casting routes oil evenly around the moving parts, which cuts noise, slows wear and helps the unit stay sealed.
Can I order a non-standard build?
Yes. AMP and AMF gearboxes can be supplied with a different shaft type, special sealing, a particular paint finish or extra options such as a brake. Dusty, damp or hot installations often need the sealing changed, so tell us about the environment when you send the duty figures and we will specify it in the quote.
What do you need from me to size one?
The working parameters: torque, the ratio or output speed, the input speed and the mounting arrangement. It also helps to know how often the drive starts, whether the load is steady or shock loaded, and what the environment is like for dust, damp and temperature. With that we size the unit and reply within one working day.
Related series
Inline helical gearboxes
WPR inline helical gearboxes
WPR inline helical gearboxes: a light, high-efficiency cylindrical gear unit with a wide choice of ratios. We size it on your real load and quote in a day.
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Quote for amp and amf inline helical gearboxes
Reply within one working day with a price, a lead time and the datasheet.
What lets us quote first time
- Ratio
- Input: IEC motor frame or free shaft
- Output torque
- Foot or flange, shaft size