Torque Sensors - Series R50 - Mark-10

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Home » Products » Indicators and Sensors » Torque Sensors » Series R50

Series R50

Universal Torque Sensors

The Series R50 torque sensor is useful for a wide range of torque measurement applications. Aluminum housing contains flat surfaces for mounting to a fixture. Jacobs chuck can accommodate a bit, fixture, or sample as required. AC1007 is shown with a Series R50 torque sensor. Unique Plug & Test^&reg; technology allows for interchangeable sensors to be used with a <a href="/products/indicators-sensors/indicators/">Mark-10 indicator</a>. All calibration and configuration data is saved in the smart connector. The Plug & Test^&reg; connector locks into the receptacle in the indicator when fully inserted. Dual buttons on the indicator housing release the connector for easy removal. Gold plated spring contacts ensure long lasting and reliable connection. View All

Series R50

Universal Torque Sensors

Measure bi-directional torque for a wide variety of applications. Contains a chuck for samples up to 1/2" (12.7 mm) diameter, depending on capacity. The sensor can be used as a hand held device, or mounted to a torque test stand. Capacities available from 10 ozFin to 100 lbFin (7 to 1,150 Ncm).

Compatible with Mark-10 indicators (sold separately), through unique Plug & Test® technology. A combined certificate for the sensor and an indicator is available at time of order, part no. CERT-SI.

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Gallery

The Series R50 torque sensor is useful for a wide range of torque measurement applications. Aluminum housing contains flat surfaces for mounting to a fixture. Jacobs chuck can accommodate a bit, fixture, or sample as required. AC1007 is shown with a Series R50 torque sensor. Unique Plug & Test^&reg; technology allows for interchangeable sensors to be used with a <a href="/products/indicators-sensors/indicators/">Mark-10 indicator</a>. All calibration and configuration data is saved in the smart connector. The Plug & Test^&reg; connector locks into the receptacle in the indicator when fully inserted. Dual buttons on the indicator housing release the connector for easy removal. Gold plated spring contacts ensure long lasting and reliable connection.

• Features
• Specifications
• Capacity x Resolution
• Dimensions
• Downloads

Features

• Member of the Plug & Test® family of interchangeable sensors and indicators
• Rugged aluminum housing
• NIST-traceable certificate of calibration with data is included. A combined certificate for the sensor and an indicator is available at time of order, part no. CERT-SI.
• Warranty: 3 years

Specifications

• Accuracy: ±0.35% of full scale + indicator
• Weight:1.4 lb [0.6 kg]
• Shipping weight:3 lb [1.4 kg]
• HS code:MR50 (all models): 9024900000AC1123, AC1124, AC1007: 9024800000
• ECCNEAR99
• Country of origin:USA

Capacity x Resolution

With Model M7I and M5I Indicators

Capacity x Resolution
Model	lbFin	ozFin	lbFft	gFcm	kgFmm	Nmm	Ncm	Nm
MR50-10Z	-	10 x 0.005	-	700 x 0.5	7 x 0.005	70 x 0.05	7 x 0.005	-
MR50-20Z	-	20 x 0.01	-	1400 x 1	14 x 0.01	140 x 0.1	14 x 0.01	-
MR50-50Z	-	50 x 0.02	-	3600 x 2	36 x 0.02	350 x 0.2	35 x 0.02	-
MR50-12	12 x 0.005	192 x 0.1	1 x 0.0005	-	-	-	135 x 0.1	1.35 x 0.001
MR50-50	50 x 0.02	800 x 0.5	4 x 0.002	-	-	-	570 x 0.5	5.7 x 0.005
MR50-100	100 x 0.05	1600 x 1	8 x 0.005	-	-	-	1150 x 0.5	11.5 x 0.005

With Model M3I Indicator

Capacity x Resolution
Model	lbFin	ozFin	kgFmm	Ncm
MR50-10Z	-	10 x 0.01	7 x 0.005	7 x 0.005
MR50-20Z	-	20 x 0.02	14 x 0.01	14 x 0.01
MR50-50Z	-	50 x 0.05	36 x 0.05	36 x 0.05
MR50-12	12 x 0.01	192 x 0.2	-	135 x 0.1
MR50-50	50 x 0.05	800 x 1	-	570 x 0.5
MR50-100	100 x 0.1	1600 x 2	-	1150 x 1

Dimensions

IN [MM]

Model	A	Chuck Size Range	Chuck Key Size
MR50-10Z	4.82 [122.4]	0.062-0.375 [1.6 - 9.5] includes key	KGA
MR50-20Z
MR50-50Z
MR50-12	5.19 [131.8]	0.078 - 0.5 [2.0 - 12.7] includes key	KK
MR50-50
MR50-100

Downloads

• Data Sheet
• User's Guide - Force and Torque Sensors
• User's Guide - M3I
• User's Guide - M5I
• User's Guide - M7I
• Solid Models
• CE – Force and Torque Gauges, Indicators, and Testers
• UKCA – Force and Torque Gauges, Indicators, and Testers
• Quick Start Guide

Ordering Information

Model	Description	US Price
MR50-10Z	Torque sensor, 10 ozFin / 700 gFcm / 7 kgFmm / 70 Nmm / 7 Ncm	$1,020.00
MR50-20Z	Torque sensor, 20 ozFin / 1400 gFcm / 14 kgFmm / 140 Nmm / 14 Ncm	$1,020.00
MR50-50Z	Torque sensor, 50 ozFin / 3600 gFcm / 36 kgFmm / 350 Nmm / 35 Ncm	$1,020.00
MR50-12	Torque sensor, 12 lbFin / 1 lbFft / 192 ozFin / 135 Ncm / 1.35 Nm	$940.00
MR50-50	Torque sensor, 50 lbFin / 4 lbFft / 800 ozFin / 570 Ncm / 5.7 Nm	$940.00
MR50-100	Torque sensor, 100 lbFin / 8 lbFft / 1600 ozFin / 1150 Ncm / 11.5 Nm	$940.00
Additional Items to Consider
AC1123	Spare chuck key for MR50-12 - MR50-100, size KK	$10.00
AC1124	Spare chuck key for MR50-10Z - MR50-50Z, size KGA	$10.00
AC1007	Mounting kit, R50, table top	$125.00
CERT-SI	Combined certificate of calibration with data, indicator + sensor, calibrated as a set	$75.00

Related Products

Model M7I Professional Force / Torque Indicator Model M5I Advanced Force / Torque Indicator Model M3I Basic Force / Torque Indicator Automated Torque Tester Series TSTM-DC Advanced Motorized Torque Test Stand Model TST / TSTH Manual Force & Torque Measurement Test Stand Manual Torque Test Stand Learn more about force and torque measurement equipment

Accuracy

Mark-10 defines accuracy as a percentage of full scale of the instrument. To determine the measurement error as an actual load value, multiply the accuracy percentage by the instrument’s capacity.

Example 1 – M5-50 force gauge:

The accuracy is ±0.1% of full scale (FS). Multiply ±0.1% by 50 lbF, which equals ±0.05 lbF. This means that any displayed reading may be higher or lower by up to 0.05 lbF. For example, if the displayed value is 30.00 lbF, the true reading will be ≥29.95 lbF and ≤30.05 lbF.

Example 2 – Plug & Test® indicators and sensors:

The accuracies of the sensor and the indicator must be added together. Models 7i and 5i indicators have accuracy values of ±0.1% FS, while the Model 3i is rated at ±0.2% FS. Using the example of a Series R50 torque sensor with Model 3i indicator, add ±0.35% to ±0.2%, which equals ±0.55%. In a specific example for the Model MR50-12, the accuracy becomes ±0.55% x 135 Ncm = ±0.7425 Ncm.

Percentage of Reading:

Because of these fixed errors, lower measured values will be more inaccurate as a percentage of reading.

Further using the example of an M5-50 force gauge, a fixed error of ±0.05 lbF represents a higher error as a percentage of reading for a load of 1.00 lbF than 30.00 lbF.

To calculate the error as a percentage of reading, divide the fixed error by the measured value. For a 1.00 lbF load, the fixed error equals ±0.05 ÷ 1.00 lbF = ±5% of reading. For a 30.00 lbF load, the fixed error equals ±0.05 ÷ 30.00 lbF = ±0.17% of reading.

Conclusion:

Because of the relationship between load and accuracy, we recommend selecting an instrument capacity as close as possible to the maximum measured load.

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Sampling Rate

Sampling rate is defined as the rate at which the instrument’s electronics communicate with its load sensor. A faster sampling rate more accurately captures the peak load which occurred during the test. This is especially apparent in applications where the load builds up and falls very quickly – such as the break testing of glass or ceramics. The graphs below illustrate the advantage of a fast sampling rate:

The graph at left shows that an instrument with slower sampling rate may not accurately detect the true peak. In the graph at right, the faster rate accurately captures the true peak.

Sampling Rate vs. Output Rate

While Mark-10 instruments internally sample at up to 14,000 Hz, a typical streaming output rate to MESURgauge software is approximately 25 - 50 Hz. If a faster data collection rate is required, our Series 7 force gauges and indicators can collect data at up to 14,000 Hz, store the data internally, and bulk-download the data to a PC when the test is complete.

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Capacity x Resolution

Capacity:

This value represents the maximum measurable load. All available capacities are listed for each available unit of measurement. All instruments measure from 0 to the indicated capacity.

Resolution:

This value represents the smallest measurable increment. For Plug & Test® sensors, the resolution depends on which indicator is used. Refer to the Capacity x Resolution tables on the particular sensor’s webpage or data sheet.

Example - M5-50 Force Gauge:

Pound-force Capacity x Resolution for the M5-50 force gauge is 50 x 0.01 lbF. This means that the gauge measures from 0 to 50 lbF, with increment size of 0.01 lbF, i.e., 0, 0.01, 0.02, 0.03…50.00.

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Hard vs. Soft Joints

Rundown fixtures contain an internal spring which dampens the rate of increase in torque when a power tool is used, thereby contributing to a more accurate torque measurement. Two fixtures are offered, with different internal spring rates, to address a wide range of applications. Select the AC1066-1 to simulate a soft joint with gradual torque buildup, or AC1066-2 to simulate a hard joint with faster torque buildup. Either fixture is suitable for the full range of torque up to 100 lbFin (11.5 Nm).

Examples of hard and soft joints are provided below: