13 SERIES R51 TORQUE SENSORS
13.1 Unpacking and Assembly
Carefully remove the sensor from the box. Series R51 sensors are available
with three interchangeable chuck attachments and bit holder. To attach the
chuck or bit holder, align the pin located on the end of the sensor body with
the hole located on the attachment (see Fig. 10.1). Thread the ring onto the
sensor body to keep the attachment in place.
13.2 Overview
Designed for clockwise and counter-clockwise torque testing. The sensor
may be handheld or mounted to a test stand, fixture, or other equipment. Bits
or fixtures may be placed in the chuck, although extra care should be taken
when handling low-capacity models.
13.3 Specifications
Accuracy:
±0.2% of full scale
Safe overload:
MR50-10Z - MR50-50Z: 300% of full scale
MR50-12 - MR50-100: 150% of full scale
Chuck opening range: MR50-10Z - MR50-50Z: 0.062 - 0.375 in [1.6 - 9.5 mm]
MR50-12 - MR50-100: 0.078 - 0.5 in [2.0 - 12.7 mm]
Operating temperature: 40ºF – 100ºF [5ºC – 38ºC]
Operating humidity:
96% max. (non-condensing)
Weight:
From 1.4 lb [0.6 kg]
13.4 Calibration
Calibration should be performed in a vertical orientation, especially for
sensors with capacities of 50 ozFin [35 Ncm] or less. Horizontal
orientation subjects the sensor to side loads resulting from the weight
of the chuck and attachments. Such side loads can be significant
enough to skew the readings out of tolerance.
The illustration to the right depicts a recommended vertical setup:
For further calibration instructions, refer to the indicator’s user’s guide.
Fig. 13.1
The attachment and main sensor body
mate with a pin and threaded ring.
