No brush contact in signal transfer
Contactless transmission removes brush wear at that interface. Inspect support bearings, couplings, alignment and fasteners as specified.
Rotary Torque Transducer with RPM Encoder
Select a shaft rotary torque transducer for motor/pump tests. Review torque, RPM, shaft fit, built-in outputs and encoder options. Request a drawing review.
Request engineering review ↗MT-RTR-605 / 0.1–5,000 Nm
A rotary torque transducer for motor and pump benches.
Contactless shaft-to-shaft torque and speed sensing with a stationary housing. Specify the measuring range, shaft connection and encoder together.
Motor characterization, pump efficiency and gearbox endurance
- Confirm the maximum RPM at your selected torque capacity; the family limits are not one operating point.
- Compare both shaft diameters, keyways, center height, mounting holes and usable coupling length.
- Request inertia, torsional stiffness, mechanical bandwidth and allowable axial/radial loads.
Reference review: FUTEK TRS605 / TRS705 · HBM T21WN / T22 · Burster 8661. Independent alternatives require mechanical, electrical and calibration acceptance.
START WITH THE COMBINED OPERATING ENVELOPE
Rated torque × RPM × shaft connection.
Series selection targets, subject to configuration approval. Maximum torque and maximum speed are not simultaneous ratings. Request a capacity-specific drawing and calibration specification.
| Model | Rated torque (Nm) | Max speed (RPM) | Shaft diameter (mm / inch) | Built-in output options | Integrated encoder (PPR) |
|---|---|---|---|---|---|
| MT-RTR-605 | 0.1–5,000 Nm | 8,000–12,000 RPM target | Keyed or smooth shaft · diameter by drawing | ±10 V / 4–20 mA / RS485Confirm model and pinout | 360 / 1024 requestedConfirm A/B direction support |
Specify the signal that your acquisition system needs.
Configuration targets include 24 V DC supply, active ±5 V / ±10 V / 0–10 V / 4–20 mA torque, TTL speed, RS485 Modbus RTU or CAN. Confirm the actual interface, update rate and pinout on the quoted model.
Requested accuracy options are ±0.1% FS and ±0.05% FS. Ask for separate nonlinearity, hysteresis, repeatability and temperature terms, plus calibration uncertainty. A full-scale error becomes a larger percentage of a small measured torque.
Plan the alignment and coupling arrangement ↗BRUSHLESS / NON-CONTACT SIGNAL TRANSFER
Remove the brush contact.
Keep the measurement discipline.
Inductive power and telemetry carry the torque signal across the rotating interface. The shaft rotates continuously; the connector and signal cable remain stationary.
Speed is a configuration rating
Review rotor geometry, capacity, balance and the full shaft train. The bearingless family targets up to 18,000 RPM on selected configurations.
Conditioning near the sensor
Request active analog or digital outputs for the PLC or DAQ. Confirm 24 V supply, bandwidth, output scaling, cable and protocol compatibility.
| Decision | Contactless telemetry | Brush / slip-ring transfer |
|---|---|---|
| Rotating signal interface | Inductive / telemetry link, no brush contact | Physical sliding contact |
| Wear review | Shaft support and mechanical assembly remain relevant | Include brush/contact inspection for that design |
| Speed & service interval | Use the model-specific specification | Use the model-specific specification |
Modern FUTEK, HBM, Magtrol and Burster models also use non-contact designs. This is a technology explanation, not a claim that those brands use brushes.
YOUR BENCH / YOUR SHAFT DIAMETERS
Configure the measurement.
Connect the whole bench.
Send torque and speed together. Include the motor and load shaft sizes for a matched coupling pair.
Request a range-specific drawing, output definition, calibration scope and written quotation.
CAD is supplied for the reviewed configuration. Please send non-confidential requirements first.