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RT2
Rotating Torque Transducer
CAPACITY
0.5Nm – 5000Nm
NON-LINEARITY
±0.2% RO
RATING
IP40
The RT2 is a rotating torque transducer with a key slot design, ideal for measuring rotational torsion at up to 4000rpm in rotating machines, test benches and automatic tightening applications.
Standard mV/V output from the RT2 measures clockwise and counterclockwise torque. The design uses slip ring technology which will require periodic maintenance - this is a simple exercise which can be carried out by the operator.
Options available include square couplings, an integrated speed/angle encoder, as well as ±10V analogue output.
Our torque transducers are supplied calibrated in one direction only as standard. However, calibration in both directions can be accommodated should this be required.
To view the full specification, please download the product datasheet.
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Typical Specification
| PARAMETER | VALUE | UNITS |
|---|---|---|
| Capacities Range | 0.5, 2.5, 5, 10, 25, 50, 100, 250, 500, 1000, 3000, 5000 | Nm |
| Rated Output | 1, 2 | mV/V |
| Sensitivity Tolerance | 0.2 | ±% of Rated Output |
| Linearity & Hysteresis | 0.2 | ±% of Rated Output |
| Temperature Effect (ON ZERO) | 0.02 | ±% of Rated Output/°C |
| Temperature Effect (ON OUTPUT) | 0.02 | ±% of Rated Output/°C |
| Input Resistance (NOMINAL LOAD) | 800±20 | Ω |
| Output Resistance (NOMINAL LOAD) | 700±5 | Ω |
| Insulation Resistance | >2 | GΩ |
| Zero Balance | ≤0.5 | ±% of Rated Output |
| Excitation (NOMINAL SUPPLY RANGE) | 1-15 | Volts AC or DC |
| Excitation (MAXIMUM SUPPLY) | 18 | Volts AC or DC |
| Mechanical Limit (SERVICE LOAD) | 100 | % of Rated Output |
| Mechanical Limit (SAFE OVERLOAD) | 150 | % of Rated Output |
| Mechanical Limit (ULTIMATE OVERLOAD) | >300 | % of Rated Output |
| Mechanical Limit (SAFE DYNAMIC LOAD) | 75(5) | % of Rated Output |
| Nominal Speed | 4000 | rpm |
| Temperature Range (OPERATING) | -10 to +70 | °C |
| Temperature Range (STORAGE) | -20 to +80 | °C |
| Weight | ~0.65 to 6 | KG |
| Environmental Sealing | IP40 | - |
| Electrical Connection | M12x1 male 5-pole connector and mating 3m cable | - |
| Construction Material (SENSOR) | Stainless Steel | - |
| Construction Material (CASE) | Aluminium | - |
Additional Information
| LOAD (Nm) | ORDERING CODE | ØA | B | C | D | E | KEYSLOT | F | G | H | I | L | M | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | MRT20NM5 | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 2.5 | MRT22NM5 | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 5 | MRT25NM | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 10 | MRT210NM | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 25 | MRT225NM | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 50 | MRT250NM | 16h6 | 30 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 100 | MRT2100NM | 25h6 | 40 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 250 | MRT2250NM | 25h6 | 40 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 500 | MRT2500NM | 25h6 | 40 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 64 | 63.5 | 52 | 26 | 32 | 44 |
| 1000 | MRT21000NM | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 41 | 80 | 80 |
| 3000 | MRT23000NM | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 41 | 80 | 80 |
| 5000 | MRT25000NM | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 41 | 80 | 80 |
Accessories - Square Couplings
| PROCESS COUPLING (Nm) | ACCORDING TO UNI ISO 1174-1 | TOTAL LENGTH (mm) |
|---|---|---|
| 25-50 | 3/8” male - 3/8” female | 89 |
| 100-250 | 1/2” male - 1/2” female | 94 |
| 500 | 3/4” male - 3/4” male | 119 |
Accessories - Internal Incremental Encoder
| PARAMETER | VALUE | UNITS |
|---|---|---|
| Output Line Driver | RS422 5V | - |
| Excitation (MAXIMUM SUPPLY) | 5V | DC |
| Maximum Absorption (NO LOAD APPLIED) | 10 | mA |
| Electrical Connection | M12x1 male 12-pole connector and mating 2m cable | - |
| RATING (Nm) | DESCRIPTION |
|---|---|
| 0.5 - 500 | 3520 pulses per revolution. Maximum speed measured 3400rpm. |
| 1000 - 5000 | 8000 pulses per revolution. Maximum speed measured 3000rpm. |
Applications
The RT2 measures CLOCKWISE torque with a POSITIVE output in tension or ANTICLOCKWISE torque with NEGATIVE output in tension.
For a correctly operational system it is necessary to prepare:
- 2x shaft couplings with a bellow or disk pack to suit the nominal torque and rotating speed (max 4000 rpm)
- 1x adjustable support that allows you to align the rT2 with the two junction shafts (tolerance 0.1mm) during the installation phase.
- The manufacturer suggests using double-jointed shaft couplings from MAYR GmbH - https://www.mayr.com/en.
The purchasing codes can be found in the table below.
| RT2 RATING (Nm) | MAYR ORDERING CODE | BORE HUB Ø |
|---|---|---|
| 0.5, 2.5, 5, 10 | 0/932.333 | 16h6 |
| 25 | 6/951.441 | 16h6 |
| 50 | 10/951.441 | 16h6 |
| 100 | 16/953.001 | 25h6 |
| 250 | 25/953.001 | 25h6 |
| 500 | 40/953.001 | 25h6 |
| 1000 | 64/953.001 | 50h6 |
| 3000 | 300/951.001 | 50h6 |
| 5000 | 500/951.001 | 50h6 |
The assembly of the couplings to the RT2 must be done whilst disconnected from the machine (system) with the transducer only connected to a display, thus verifying in real time that no unwanted torque, bending or tension are generated which may overload the transducer.
Mount the RT2 with its couplings on the support, align the system along its own axis and connect the system. Even in this phase, care must be taken that the measure showed on the display does not exceed the nominal torque rating of the transducer.
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