STM RMI 70 100:1 Worm Gearbox STM RMI 70 80:1 Worm Gearbox STM RMI 70 60:1 Worm Gearbox STM RMI 70 50:1 Worm Gearbox STM RMI 70 40:1 Worm Gearbox STM RMI 70 30:1 Worm Gearbox STM RMI 70 25:1 Worm Gearbox STM RMI 70 20:1 Worm Gearbox STM RMI 70 15:1 Worm Gearbox STM RMI 70 10:1 Worm Gearbox STM RMI 70 7.5:1 Worm Gearbox STM RMI 70 5:1 Worm Gearbox STM RMI 70 Worm Gearboxes STM RMI 63 100:1 Worm Gearbox STM RMI 63 80:1 Worm Gearbox STM RMI 63 60:1 Worm Gearbox STM RMI 63 50:1 Worm Gearbox STM RMI 63 40:1 Worm Gearbox STM RMI 63 30:1 Worm Gearbox STM RMI 63 25:1 Worm Gearbox STM RMI 63 20:1 Worm Gearbox STM RMI 63 15:1 Worm Gearbox STM RMI 63 10:1 Worm Gearbox STM RMI 63 7.5:1 Worm Gearbox STM RMI 63 5:1 Worm Gearbox STM RMI 50 100:1 Worm Gearbox STM RMI 50 80:1 Worm Gearbox STM RMI 50 60:1 Worm Gearbox STM RMI 50 50:1 Worm Gearbox STM RMI 50 40:1 Worm Gearbox STM RMI 50 30:1 Worm Gearbox STM RMI 50 25:1 Worm Gearbox STM RMI 50 20:1 Worm Gearbox STM RMI 50 15:1 Worm Gearbox STM RMI 50 10:1 Worm Gearbox STM RMI 50 7.5:1 Worm Gearbox STM STM RMI 50 Worm Gearboxes STM RMI 50 5:1 Worm Gearbox

STM Worm Gearboxes

⚙️ Genuine STM Gearboxes
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STM RMI Worm Gearboxes Supplier UK – Industrial Right-Angle Reducers

STM worm gearboxes are ideal for compact right-angle speed reduction and torque multiplication in conveyors, packaging lines, processing equipment, handling systems and general OEM machinery. Use this page to explore the STM range by size family, ratio and mounting style so you can shortlist the right gearbox faster.

Choose from 60 STM products across 5 size families. Use the quick links below to compare popular ratios, bore sizes and mounting options, and browse alternative brands if you need a different specification.

Get a STM Quote
Check Torque Requirements

Shop STM by Size Family

Use these quick links to browse the main STM size families so you can compare bore sizes, reduction ratios and mounting options more easily.


STM RMI 28 – 14mm Hollow Bore


STM RMI 40 – 19mm Hollow Bore


STM RMI 50 – 24mm Hollow Bore


STM RMI 63 – 25mm Hollow Bore


STM RMI 70 – 28mm Hollow Bore

Shop Popular STM Ratios

Use these ratio links to browse the closest STM products by reduction, making it easier to compare output speed, torque and gearbox size.


5:1


7.5:1


10:1


15:1


20:1


25:1


30:1


40:1

Compare Alternative Worm Gearbox Brands

Many buyers compare alternative worm gearbox brands based on size range, mounting style, availability and replacement compatibility. Use the related links below to explore similar options if you need a different specification.


Varvel


Motovario


Spaggiari


SITI


Bonfiglioli


Rossi

Helpful Tools & Compatibility Links

All Worm Gearboxes | IEC Electric Motors | Gear Ratio & Speed Calculator | Output Torque Calculator | Service Factor Calculator

STM FAQs

What makes STM worm gearboxes suitable for industrial use?

STM worm gearboxes are well suited to industrial applications where compact 90° drive, reliable speed reduction and steady torque output are needed. They are commonly used on conveyors, packaging equipment, processing machinery, handling systems and general OEM applications.

How should I choose the right STM size?

Choose the right STM size based on the required output torque, ratio, bore or shaft size, motor input flange and mounting position. Once you know those details, you can compare the most suitable options in the range more confidently.

Which ratios are available in this range?

This STM range includes a selection of popular reduction ratios to suit different output speed and torque requirements. Use the ratio links on this page to compare the closest options for your application.

Can these be paired with IEC motors?

Yes. Many STM worm gearboxes can be paired with standard IEC motors, including common B5 and B14 input arrangements depending on the model and size.

Do you offer help with replacements and cross-references?

Yes. If you are replacing an existing STM unit, send us the model details, ratio, bore size and motor flange and we will help you identify a suitable replacement.