Keyed shaft or clamping hub drawing review
Share the complete mating drawing and available envelope.
MT-RTS-SHF / STATIC TORQUE SENSING
Shaft-to-Shaft Reaction Torque Sensors
Resolve small torque in a restrained shaft assembly.
Keyed and clamp-coupled static torque transducers for bearing friction, small-pump loads and restrained torsional test fixtures. Cabled static sensors must not rotate continuously.
Requested range 0.1–1,000 Nm
DRAWING REVIEW / CONFIGURATION MATRIX
Torque capacity is only the first dimension.
Series selection envelope, not released model specifications. Request the range-specific drawing and measured stiffness/cross-load limits before design release.
| Model (MT-RTS-xxx) | Rated Torque (Nm / in-lb) | Outer Dia. & Bolt Circle (OD / BCD) | Center Thru-Bore ID (mm) | Torsional Stiffness (Nm/rad) | Max Axial Thrust Limit (N) |
|---|---|---|---|---|---|
| MT-RTS-SHFSeries / request code | 0.1–1,000 Nm0.89–8,850.75 in-lb | Drawing confirmation | Shaft interface; bore by special review | Range-specific confirmation | Combined-load review required |
Bearing friction and low-torque component tests
Include duty cycle, dynamic peaks and the surrounding fixture.
Reference equipment
Honeywell QW · exact FUTEK TRS model principle review
Independent comparison only. Original model identity and principle must be checked.
BEFORE SELECTING THE RANGE
Check the loads the torque channel does not measure.
- Shaft diameter, key dimensions and coupling concentricity
- Axial/radial support and prevention of continuous sensor rotation
- Low-range zero stability, cable strain relief and fixture friction
Material and signal targets: 17-4PH stainless or 7075-T6 aluminum; 1.5–2.0 mV/V nominal full-bridge output; CW/CCW calibration. The requested ±0.05–0.1% FS nonlinearity/hysteresis target requires range-specific verification. Temperature effects, excitation, overload, IP rating and cross-axis sensitivity are confirmed per configuration.
MEASURE THE FIXED LOAD PATH
The shaft turns. The sensor stays on the frame.
A Reaction Torque Sensor between a motor or gearbox housing and the fixed frame measures the housing torque without rotating the sensor cable.
For steady-state balance, relate housing torque to shaft torque after accounting for losses and other loads. During acceleration, include rotor inertia and any parallel torque paths. Validate fixture resonance, sensor bandwidth and cross-load limits.
Review fixed-housing vs. rotary measurement ↗
ENGINEERING QUESTIONS
Resolve the load path before ordering.
Can a static sensor measure a changing motor load?
Yes, when the sensor remains stationary and the varying housing load is within the complete measurement system bandwidth. Review inertia, losses, resonances and other torque paths before relating it to shaft output.
Is a reference model a guaranteed drop-in replacement?
No. Approve the range-specific mechanical drawing, stiffness, cross-load limits, excitation, sensitivity and connector wiring before a replacement is released.
What comes with the requested calibration?
Request five points in both CW and CCW, the sensor/readout pairing, uncertainty and the traceability chain. The quotation confirms the actual report scope; NIST traceability is not a blanket product certification.
REQUEST QUOTE / CAD
Start with your load and mounting envelope.
Send the installation constraints. We will review the sensor configuration, drawing, calibration scope and commercial quotation.
Prefer email? inquiry@reactiontorque.com
Please send non-confidential specifications first. CAD is supplied for the agreed configuration after engineering review.
Other torque sensor interfaces
01 / MT-RTS-FLG
Flange-to-flange
0.5–5,000 Nm
Motor stator and valve actuator test stands02 / MT-RTS-JNTHollow robotic joint
1–500 Nm
Humanoid, exoskeleton and surgical robot joints03 / MT-RTS-SQSquare drive & hex
1–2,000 Nm
Torque-tool and fastener calibration fixtures04 / MT-RTS-SHFKeyed shaft
0.1–1,000 Nm
Bearing friction and low-torque component tests05 / MT-RTS-FZThrust + torque
1–1,000 Nm + 100 N–50 kN
Drilling, tapping and fastener preload correlation