STM

STM Gearboxes UK – RMI Worm Gearbox & Industrial Drive Supplier

STM gearboxes UK are used across industrial automation, conveyors, packaging machinery, processing equipment, production lines, material handling systems and general OEM machinery. STM drive products are designed for applications that require reliable speed reduction, increased output torque and dependable mechanical power transmission.

At Worm Gear Motors Online, we supply STM RMI worm gearboxes online and can quote for additional STM gearbox and geared motor requirements. Whether you are replacing an existing STM unit, matching a failed gearbox from a machine, or selecting a new drive for an industrial application, we can help confirm the correct size, ratio, motor input, output arrangement and mounting position.

---

STM Industrial Gearboxes and Geared Drive Products

STM manufactures industrial power transmission products for machinery that needs controlled output speed, reliable torque transfer and practical mounting flexibility. STM gearboxes and geared drive products are used in manufacturing, automation, material handling, food processing, packaging, agriculture and general industrial equipment.

For UK buyers, STM is a strong choice when a recognised European gearbox manufacturer is required. Selecting the correct unit normally involves confirming the gearbox series, frame size, reduction ratio, motor power, input flange, output bore or shaft, mounting position, service factor and operating duty.

Our main online STM range is the RMI worm gearbox series. Additional STM gearbox and geared motor configurations can be quoted where the model, ratio and application requirements are available.

---

STM RMI Worm Gearboxes

The STM RMI worm gearbox range provides compact right-angle speed reduction for electric motor driven machinery. RMI gearboxes are particularly useful where the motor shaft and driven shaft need to operate at 90 degrees, while maintaining a compact installation footprint.

STM RMI worm gearboxes are selected according to frame size, reduction ratio, motor input, output bore and required torque. Smaller RMI sizes are suited to compact machinery and lighter-duty applications, while larger frame sizes provide increased torque capacity and better suitability for conveyors, processing equipment and heavier industrial drives.

---

Shop STM RMI Worm Gearboxes by Size

Browse our STM RMI worm gearbox categories below. Select the required frame size to compare available ratios, motor input options and gearbox configurations.

---

STM RMI Worm Gearbox Size Guide

Use the guide below as a general starting point when comparing STM RMI gearbox sizes. Final selection should always be based on output torque, ratio, motor power, operating hours, duty cycle, output bore and mounting arrangement.

STM RMI Size	Typical Duty Level	Common Applications
RMI 28	Compact light-duty drives	Small conveyors, dosing equipment, light automation and compact machinery
RMI 40	Light to medium-duty drives	Packaging machinery, small production equipment and light material handling
RMI 50	Medium-duty industrial drives	Conveyors, handling systems, automated machinery and OEM equipment
RMI 63	Medium to heavier-duty drives	Industrial conveyors, production machinery and processing equipment
RMI 70	Higher-load industrial drives	Larger conveyors, production systems and demanding replacement applications

---

How to Select the Correct STM Gearbox

The correct STM gearbox cannot be selected by frame size alone. The reduction ratio determines the output speed, while the gearbox size and service factor determine whether the unit can safely handle the required output torque and operating conditions.

For a reliable selection, confirm the motor power and input speed, required output speed, output torque, bore or shaft diameter, input flange, mounting position, operating hours and load type. Frequent starts, shock loading, reversing duty and continuous operation can all increase the required gearbox capacity.

For replacement applications, the complete STM model code and nameplate details should be checked wherever possible. Small differences in ratio, input flange, bore size or mounting arrangement can prevent an otherwise similar gearbox from fitting correctly.

---

Why Choose STM RMI Worm Gearboxes?

STM RMI worm gearboxes provide a compact method of reducing electric motor speed and increasing usable output torque. Their right-angle arrangement makes them especially suitable where machinery layout does not allow the motor and output shaft to be positioned in line.

The RMI range allows buyers to move through multiple frame sizes as torque requirements increase. Smaller sizes provide a compact solution for light machinery, while larger RMI gearboxes offer increased mechanical capacity, larger output arrangements and better suitability for heavier industrial equipment.

RMI gearboxes can also be matched with compatible IEC electric motors where the motor frame, flange and permitted input power suit the selected gearbox size and ratio.

---

STM Replacement Gearboxes

If you need an STM replacement gearbox, begin by locating the gearbox nameplate and recording the complete model code. This may identify the series, frame size, ratio, mounting position and other configuration details needed for an accurate replacement.

You should also confirm the output bore or shaft diameter, motor flange, mounting method and overall installation arrangement. Two STM gearboxes with the same basic frame size may still differ in ratio, input configuration, output type or mounting position.

Worm Gear Motors Online can help match STM replacement gearboxes using nameplate photographs, shaft measurements, motor information and application details. Where an exact replacement cannot be supplied, we can help compare suitable alternatives based on ratio, torque, bore size, motor input and installation requirements.

---

STM Gearmotors and IEC Motor Compatibility

STM gearboxes can be supplied as part of a geared motor assembly or matched with a compatible IEC electric motor. The selected motor must suit the gearbox input flange, shaft dimensions and permitted input power for the chosen frame size and ratio.

When replacing a complete STM geared motor, provide both the motor and gearbox nameplates. Motor power, speed, frame size, voltage, mounting type and brake requirements can all affect whether the replacement will be mechanically and electrically suitable.

For new machinery, we can help identify a suitable gearbox and motor combination using the required output speed, torque, operating duty, mounting position and electrical supply.

---

Other STM Gearbox Requirements

Although our main online STM range currently focuses on RMI worm gearboxes, we can also assist with other STM gearbox and geared motor requirements by quotation. Send us the complete STM part number, product series, ratio, motor details and required quantity.

This is particularly useful for replacement units, less common configurations and industrial machinery where the exact gearbox arrangement is not currently listed online.

---

Common STM Gearbox Applications

STM gearboxes and geared motors are used in machinery where controlled speed and reliable torque transmission are required. Typical applications include belt conveyors, roller conveyors, packaging machines, mixers, processing machinery, agricultural equipment, handling systems, production lines and automated equipment.

The correct gearbox size should be selected according to the actual load and operating duty rather than physical dimensions alone. High starting loads, frequent starts, reversing operation and shock loading may require a larger frame size or higher service factor.

---

Why Buy STM Gearboxes From Worm Gear Motors Online?

We help engineers, maintenance teams, industrial buyers and machinery builders source STM gearboxes for replacement, maintenance and new-build applications. Our selection support is based on the technical requirements of the machine, including ratio, torque, bore size, motor input and mounting arrangement.

Send us the STM model number, photographs, ratio, motor details, shaft or bore dimensions and application information. We can use these details to help confirm the most suitable configuration and provide a competitive quotation.

---

Helpful STM Gearbox Tools and Product Links

STM RMI Worm Gearboxes |
All Worm Gearboxes |
All Industrial Gearboxes |
IEC Electric Motors |
Gear Ratio and Speed Calculator |
Output Torque Calculator |
Service Factor Calculator

---

STM Gearbox FAQs

What are STM gearboxes used for?

STM gearboxes are used to reduce motor speed and increase output torque in conveyors, packaging machinery, automation systems, processing equipment, production machinery and general industrial drive applications.

Are STM gearboxes available in the UK?

Yes. Worm Gear Motors Online supplies STM gearboxes in the UK for replacement, maintenance and new machinery applications. Contact us with the model number and technical details for selection support and a quotation.

What is an STM RMI gearbox?

The STM RMI is a worm gearbox range designed for compact right-angle speed reduction. It is commonly paired with an electric motor where the driven shaft needs to operate at 90 degrees to the motor shaft.

Which STM RMI gearbox sizes are listed online?

Our current online STM RMI categories include RMI 28, RMI 40, RMI 50, RMI 63 and RMI 70 worm gearboxes. Other STM gearbox requirements can be quoted separately.

How do I choose the correct STM gearbox ratio?

Divide the motor input speed by the required output speed to estimate the gearbox ratio. The final selection must also be checked against output torque, duty cycle, service factor and gearbox capacity.

Can STM gearboxes be fitted to IEC electric motors?

Many STM gearboxes can be paired with compatible IEC electric motors. The motor frame, flange, shaft and power must match the input configuration and permitted input rating of the selected gearbox.

Can you help replace an existing STM gearbox?

Yes. Send us the complete STM model number, ratio, motor details, bore or shaft size, mounting position and clear nameplate photographs. We can use this information to help identify the closest suitable replacement.

What information is needed for an STM gearbox quotation?

Provide the gearbox model, frame size, ratio, output arrangement, motor input, mounting position, motor power and required quantity. For new applications, also include the required output speed, output torque and operating duty.

Do you supply STM geared motors?

We can assist with STM geared motor enquiries. Send the complete motor and gearbox nameplate details so the motor power, speed, voltage, frame size, mounting and gearbox configuration can be checked.

Can you quote STM products that are not listed online?

Yes. Send us the STM part number, gearbox series, ratio, motor details and quantity required. We can check availability and quote for additional STM gearbox and geared motor configurations.