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RT8
Contactless Rotating Torque Transducer
CAPACITY
0.5Nm – 5000Nm
NON-LINEARITY
±0.2% RO
RATING
IP40
The RT8 is a contactless rotating torque transducer with a key slot design and +/-10V output, ideal for measuring rotational torsion at up to 4000rpm in rotating machines, test benches and automatic tightening applications.
Options available include square couplings and/or an integrated speed/angle encoder.
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 | ±10 | 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 |
| Insulation Resistance | >2 | GΩ |
| Zero Balance | ≤0.5 | ±% of Rated Output |
| Excitation (NOMINAL SUPPLY RANGE) | 17-24 | Volts AC or DC |
| Excitation (MAXIMUM SUPPLY) | 28 | Volts AC or DC |
| Maximum Absorption (NO LOAD APPLIED) | 60 | mA |
| Loading Resistance | 3 | KΩ |
| 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) | 70 | % 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, mating 3m cable | - |
| Construction Material (SENSOR) | Stainless Steel | - |
| Construction Material (CASE) | Aluminium | - |
Additional Information
| LOAD (Nm) | ØA | B | C | D | E | KEYSLOT | F | G | H | I | S | L | M | N | P | Q |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 2.5 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 5 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 10 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 25 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 50 | 16h6 | 31.5 | 25 | 5 | 3 | UNI 6604 form A 5x5 | 2.5 | 65 | 68 | 55 | 27.5 | 128 | M3 | 43 | 6 | 43 |
| 100 | 25h6 | 42.5 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 65 | 68 | 55 | 27.5 | 150 | M3 | 43 | 6 | 43 |
| 250 | 25h6 | 42.5 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 65 | 68 | 55 | 27.5 | 150 | M3 | 43 | 6 | 43 |
| 500 | 25h6 | 42.5 | 35 | 8 | 4 | UNI 6604 form A 8x7 | 2.5 | 65 | 68 | 55 | 27.5 | 150 | M3 | 43 | 6 | 43 |
| 1000 | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 43 | 300 | M4 | 80 | 8 | 80 |
| 3000 | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 43 | 300 | M4 | 80 | 8 | 80 |
| 5000 | 50h6 | 100 | 80 | 14 | 5.5 | UNI 6604 form A 14x9 | 5 | 100 | 100 | 100 | 43 | 300 | M4 | 80 | 8 | 80 |
| LOAD (Nm) | ORDERING CODE |
|---|---|
| 0.5 | MRT80NM5 |
| 2.5 | MRT82NM5 |
| 5 | MRT85NM |
| 10 | MRT810NM |
| 25 | MRT825NM |
| 50 | MRT850NM |
| 100 | MRT8100NM |
| 250 | MRT8250NM |
| 500 | MRT8500NM |
| 1000 | MRT81000NM |
| 3000 | MRT83000NM |
| 5000 | MRT85000NM |
Accessories - Square Couplings
| PROCESS COUPLING (Nm) | ACCORDING TO UNI ISO 1174-1 | TOTAL LENGTH (mm) |
|---|---|---|
| 0.5, 10 | 1/4” male - 1/4” female | 86 |
| 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 RT8 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 4000rpm).
- 1x adjustable support that allows you to align the RT2 with the two junction shafts (tolerance ±0.1mm) during the installation phase.
The assembly of the couplings to the RT8 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 RT8 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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