UMSG50 7.5:1 Worm Gearbox - 25mm Hollow Output Bore, IEC 63/71/80 Input, Aluminium
The Universal Motors UMSG50 7.5:1 worm gearbox is a single-reduction aluminium-housed 50mm centre-distance worm/wheel reducer with a 25mm hollow output bore. This gearbox can be paired with a TEFC IEC squirrel-cage motor, available in your choice of power and input flange - either B14 or B5 motor mounting, in IEC frame sizes 63/71/80. Use the motor power dropdown to match your application's torque and speed requirements.
Technical specification
- Frame: UMSG50 (centre distance 50mm)
- Reduction ratio: 7.5:1
- Output bore: 25mm hollow, reducing bushes available
- Input mounting: IEC 63/71/80 (B14 or B5 flange)
- Motor options: 0.55kW, 0.75kW, 1.1kW
- Housing: aluminium, B3 foot-mounted
- Worm: hardened and ground steel; wheel: centrifugally cast bronze
- Lubrication: synthetic long-life, factory filled
- Gearbox weight: 5.5kg
- Maximum output torque: 72 Nm (ratio-dependent)
- Duty: S1 continuous
Applications
Typical uses include conveyors, mixers, dosing systems, packaging lines, light winching.
Cross-reference
Interchangeable with: NMRV050, RV050, Motovario NMRV050, Bonfiglioli VF49.
Warranty and delivery
24-month manufacturer warranty. UK stock with next-day delivery.
| Input power | 0.55 kW |
|---|---|
| Input flange | B14 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 24.8 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 2.91 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-0.55kW-B14 |
| Input power | 0.55 kW |
|---|---|
| Input flange | B5 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 24.8 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 2.91 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-0.55kW-B5 |
| Input power | 0.75 kW |
|---|---|
| Input flange | B14 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 33.8 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 2.13 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-0.75kW-B14 |
| Input power | 0.75 kW |
|---|---|
| Input flange | B5 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 33.8 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 2.13 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-0.75kW-B5 |
| Input power | 1.1 kW |
|---|---|
| Input flange | B14 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 49.5 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 1.45 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-1.1kW-B14 |
| Input power | 1.1 kW |
|---|---|
| Input flange | B5 |
| IEC frame | 80 |
| Input speed | 1400 rpm |
| Ratio | 7.5:1 |
| Output speed | 195 rpm |
| Output torque | 49.5 Nm |
| Nominal torque | 72 Nm |
| Max output torque | 49.5 Nm |
| Service factor | 1.45 |
| Efficiency | 90% |
| Centre distance | 50 mm |
| Output bore | 25 mm |
| Type | Worm Gearbox |
| Housing material | Aluminium |
| Series | UMSG50 |
| Brand | Universal Motors |
| Warranty | 12 months manufacturer |
| SKU | IMW-UMSG50-7.5-1.1kW-B5 |
UK delivery
Next working day to most of the UK, on a fully tracked courier - you'll have the tracking link the moment it leaves our racking.
★ 2pm Promise: place your order before 2pm and it is despatched the same working day. Guaranteed, not just aimed for.
Shipping worldwide
We ship to 70+ countries with rates calculated live at checkout, so the price you see is the price you pay - no surprise invoice a week later. Moving several units, or need pallet freight? Get a freight quote on WhatsApp.
Returns
Specified the wrong one? Send it back within 14 days, unused and in its original packaging, and we'll refund it. Built-to-order and modified items are the one exception. Read the full returns policy →
Availability
4 × 0.55kW / B14 Face on the shelf in our UK warehouse, boxed and ready to go out today.
8 × 0.55kW / B5 Flange on the shelf in our UK warehouse, boxed and ready to go out today.
8 × 0.75kW / B14 Face on the shelf in our UK warehouse, boxed and ready to go out today.
8 × 0.75kW / B5 Flange on the shelf in our UK warehouse, boxed and ready to go out today.
2 × 1.1kW / B14 Face on the shelf in our UK warehouse, boxed and ready to go out today.
3 × 1.1kW / B5 Flange on the shelf in our UK warehouse, boxed and ready to go out today.
Which mounting do I need?
The mounting type describes how the motor is fixed in place and how the shaft connects to your equipment. Choosing the right one ensures a direct, drop-in fit.
- B3 (Foot) - bolts down through feet on the base. The most common general-purpose mounting.
- B5 (Flange) - a large machined flange with clearance holes bolts directly to your gearbox or machine face.
- B14 (Face) - a smaller spigot/face flange with tapped holes, for lighter direct-coupled loads.
- B35 / B34 - combination mountings that provide both feet and a flange for extra support.
Still not sure? Message an engineer with your machine or existing motor's frame and we'll confirm the exact mounting for you.
Send us a message
Ask our UK engineers about this motor - sizing, stock, or a custom quote. Required fields are marked with *.