Rodless belt actuator
Tolomatic B3W Belt-Drive Rodless actuator
Wide steel-cord urethane belt version of the B3 rodless actuator for long, fast strokes up to 14.6 m and 5 m/s with integral bearing guidance.
Key specifications
| Ingress protection | IP44 |
|---|---|
| Temperature | 4–54 °C |
| Force (max) | 1,446 N |
| Stroke (max) | 14,579 mm |
| Linear speed (max) | 5,080 mm/s |
| Screw lead | 80.04, 120.02, 139.95 (travel per rev) |
| Screw type | belt |
| Repeatability | 0.05 mm |
| Duty | 100% (rodless page); not specified in PDF |
| Sizes | B3W10, B3W15, B3W20 |
| Max load | 35,600 |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Tolomatic B3W Belt-Drive Rodless model codes
Published model codes in the B3W Belt-Drive Rodless range, with key figures from the manufacturer's data. Search this page for your part number, or send it to us for availability, pricing and lead time.
| Model code | Max thrust (N) | Max stroke (mm) | Max speed (mm/s) | Max payload (kg) |
|---|---|---|---|---|
| B3W10 | 667 | 11938 | 3988 | 286 |
| B3W15 | 1112 | 10566 | 5080 | 660 |
| B3W20 | 1446 | 8128 | 5080 | 911 |
Options
- direct drive left/right
- reduction drives (top/bottom, left/right)
- Kevlar-reinforced belt option
- auxiliary and dual 180° carriers
- tube supports
- food-grade grease
- Your Motor Here
Typical applications
What a rodless belt actuator is
A rodless belt actuator moves a carriage along an aluminium profile using a toothed belt driven by a pulley at one end. The load mounts on the carriage, which runs on internal bearings or profile rails, so the unit carries and guides the load. Because the belt does not whip like a long screw, stroke can be long, typically several metres, and speeds are high. Belt drives are less stiff than screws, so they suit fast transfer more than high-force pushing.
When engineers choose a rodless belt actuator
Choose a belt actuator for long strokes, high speed and lighter thrust loads, such as transfer axes, gantries and pick-and-place over distance. The trade-offs are stiffness, thrust and accuracy: belt stretch reduces stiffness and repeatability compared with screw drives, and vertical axes need a brake and careful sizing. For high thrust or tight positioning at short stroke, a screw rodless actuator is usually a better fit.
How to specify the Tolomatic B3W Belt-Drive Rodless
Send these with your enquiry and an engineer can confirm the right B3W Belt-Drive Rodless variant:
- Payload mass and moment loads (kg, Nm)
- Stroke (mm or m)
- Speed and acceleration (m/s, m/s²)
- Positioning repeatability (mm)
- Thrust force needed (N)
- Orientation and any vertical axis requirements
- Motor mounting, gearbox and environment
Common mistakes to avoid
- Forgetting belt tension and stretch when tight repeatability is needed
- Using a belt actuator for pressing or high thrust tasks
- Ignoring reflected inertia and gearbox ratio on high-acceleration axes
- Mounting the profile unsupported over long spans
Tolomatic B3W Belt-Drive Rodless: frequently asked questions
What is the Tolomatic B3W Belt-Drive Rodless?
Wide steel-cord urethane belt version of the B3 rodless actuator for long, fast strokes up to 14.6 m and 5 m/s with integral bearing guidance. Published series figures include temperature 4 °C, temperature 54 °C, force 1,446 N, stroke 14,579 mm. It is available through our supply network, and our engineers can confirm the right variant for your application.
Who makes the Tolomatic B3W Belt-Drive Rodless?
The Tolomatic B3W Belt-Drive Rodless is made by Tolomatic (Tolomatic Inc.) available through our supply network. Send us your requirement for pricing, lead time, datasheets and CAD.
What model codes are in the Tolomatic B3W Belt-Drive Rodless range?
The B3W Belt-Drive Rodless range includes B3W10, B3W15, B3W20. The table on this page lists each published model code with its key figures. Send us the code you use, or the one you need to replace, and our engineers will confirm availability, lead time or the closest equivalent.
What is the temperature of the Tolomatic B3W Belt-Drive Rodless?
The published series minimum temperature is 4 °C. Individual models and sizes in the B3W Belt-Drive Rodless range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
How long can a belt-driven linear actuator be?
Belt actuators commonly reach several metres of stroke from one profile, and longer strokes are possible with joined profiles. The limits are profile stiffness, belt stretch, support spacing and the moment loads on the carriage. Long axes need regular supports along their length to avoid sag.
How accurate is a belt-driven actuator?
Repeatability on belt actuators is typically in the region of a tenth of a millimetre, depending on belt type, tension and load, which is coarser than screw drives. Accuracy is affected by belt stretch and pulley tolerances. For better accuracy, add linear encoder feedback or choose a screw drive.
Further reading: Rodless belt vs screw actuators · How to size a linear actuator · Linear actuators
Often compared with
Engineers specifying this series often compare it with:
Other rodless belt actuator series
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