• Silver Kunwei sensor with front-facing circular connector, X+ marking, black base and raised central rim.
  • Angled top view of the sensor showing a recessed black center, silver mounting face and lower-left connector.
  • Overhead view of the silver sensor face with curved recesses, threaded holes, black center and right-side connector.
  • Angled underside of the sensor showing a black mounting plate, four threaded studs, central opening and side connector.
  • Silver sensor in a repeated angled view, with Y+ side marking, left connector and mounting holes around a recessed center.
  • Straight-on underside view of the black sensor plate with a central opening, four silver stud ends and surrounding holes.
  • Rear angled view of the silver sensor with Kunwei body branding, two small side holes and a raised circular mounting face.
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Kunwei Sensing KWR75 Six-Axis Force/Torque Sensor, 75 mm, 1000 Hz for Robotic Force Measurement

Kunwei Sensing KWR75 Six-Axis Force/Torque Sensor, 75 mm, 1000 Hz for Robotic Force Measurement

Kunwei Sensing

$7,006.00 USD
$7,006.00 USD
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Overview

The Kunwei Sensing KWR75 is an embedded six-axis force/torque sensor for robotic force measurement, drag teaching, assembly and load testing. Its 75 mm diameter, digital output and 1000 Hz sampling frequency support integration into force-monitoring systems. Eight versions offer different force and torque ranges, with heights of 31.5 or 33.5 mm. All versions operate from a 12–48 VDC supply.

Features

  • Measures force on Fx, Fy and Fz and torque on Mx, My and Mz.
  • Silicon strain-gauge sensing uses strain-based electrical measurement to convert applied load into a voltage signal.
  • Six-axis joint calibration technology and digital signal output.
  • Aluminum-alloy construction with version-specific anodized or electropolished surface treatment.
  • Eight selectable versions: KWR75A, KWR75B, KWR75C, KWR75D, KWR75E, KWR75F, KWR75G and KWR75K.

Specifications

Version Specifications

Parameter Unit KWR75A KWR75B KWR75C KWR75D KWR75E KWR75F KWR75G KWR75K
Range Fx, Fy N 50 200 — 500 30 100 800 1800
Range Fz N 50 200 500 700 30 100 1000 3000
Range Mx, My N·m 2 8 12 18 1.5 4 36 45
Range Mz N·m 2 8 12 18 1.5 4 36 45
Diameter mm 75 75 75 75 75 75 75 75
Height mm 31.5 31.5 33.5 33.5 31.5 31.5 33.5 33.5
Material — Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy
Surface treatment — Anodized Anodized Anodized Anodized Anodized Anodized Electropolished Electropolished
Overload level %FS 300 300 300 300 300 300 300 200
Resolution %FS 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Repeatability %FS 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.5
Accuracy %FS 0.5 0.5 0.5 0.5 0.5 0.5 0.5 2
Weight kg 0.08 0.28 0.32 0.36 0.26 0.28 1.1 1.12
Protection level — IP64 IP64 IP64 IP64 IP64 IP63 IP64 IP64
Working temperature °C −10 to 80 −10 to 80 −10 to 80 −10 to 80 −10 to 80 −10 to 80 −10 to 80 −10 to 80
Sampling frequency Hz 1000 1000 1000 1000 1000 1000 1000 1000
Supply voltage VDC 12–48 12–48 12–48 12–48 12–48 12–48 12–48 12–48

FS means full scale. The dash in the KWR75C Fx/Fy cell indicates that a confirmed value is not available.

Signal and Communications

Scope Signal or communications
KWR75 series Digital signal output
KWR75 series; individual version assignment unspecified RS422, RS485, MODBUS and Industrial Ethernet Protocol
KWR75A–KWR75F; individual protocol assignment unspecified RS422, RS485, Modbus-RTU and CAN

Mechanical Reference Dimensions

The following mounting dimensions are KWR75 mechanical reference dimensions. Parenthesized dimensions are retained as alternatives without assigning them to individual versions.

Area Detail Dimension or tolerance
Body Outside diameter Ø75 mm
Tool side Pin holes 2 × Ø6 mm; diameter tolerance +0.02/0 mm; depth 6 mm
Tool side Threaded holes 4 × M6; depth 6 mm
Tool side Hole-pattern diameters Ø50 mm and Ø63 mm
Tool side Angular offsets from Y+ centerline 2 × 45°
Tool side Offsets from X+ centerline 25 mm above and 25 mm below
Tool side Positional tolerance 0.02 mm relative to datum A
Section A–A Screw designation and section dimension M4 hexagon socket cap screws; 5 mm dimension
Mounting side Hole-pattern diameter Ø66 ±0.05 mm
Mounting side Pin holes 2 × Ø5 mm; diameter tolerance +0.02/0 mm; depth 6 mm
Mounting side Pin-hole positional tolerance 0.02 mm relative to datum A
Mounting side Angular intervals 6 × 20°
Mounting side Angular dimensions 2 × 120° ±0.03°
Lower section Diameter Ø31.5 mm; tolerance +0.03/0 mm
Lower section Section height 24.5 mm (26.5 mm)
Lower section Overall height 31.5 mm (33.5 mm)

Applications

  • Robotic drag teaching and precision assembly: Measure forces and torques during hand-guided motion and component insertion with robotic arms and collaborative robots. Six-axis sensing supports monitoring contact loads during tasks such as automobile gearbox assembly.
  • Curved-surface grinding and precision polishing: Monitor tool-to-workpiece forces and torques during surface finishing to provide load feedback for the process.
  • Cutting-force measurement and torque monitoring: Capture loads on three force axes and three torque axes for machining, 3C testing and automobile testing.
  • Collaborative-robot collision testing: Record contact forces and moments during controlled collision tests using the 1000 Hz sampling frequency.
  • Robotic vehicle-charging engagement: Monitor contact loads while positioning a charging connector for a new-energy vehicle.
  • Robot interaction and mobility testing: Measure interaction loads during development of humanoid robots, quadruped robots and AGV systems.
  • Exoskeleton, motion-rehabilitation and sport-performance testing: Measure applied forces and torques during assisted-motion and performance test tasks.
  • Medical detection, medical testing and surgical-robot development: Provide force/torque measurements for instrumented testing and robot interaction studies.

Documents and Downloads

FAQ

Do all KWR75 versions have the same dimensions?

All eight versions have a 75 mm diameter. KWR75A, KWR75B, KWR75E and KWR75F are 31.5 mm high; KWR75C, KWR75D, KWR75G and KWR75K are 33.5 mm high.

Do all versions have the same accuracy and protection level?

No. KWR75A–KWR75G have 0.5%FS accuracy and 0.1%FS repeatability; KWR75K has 2%FS accuracy and 0.5%FS repeatability. KWR75F is rated IP63, while the other seven versions are rated IP64.

What power supply and sampling frequency does the sensor use?

Every listed version uses a 12–48 VDC supply and has a 1000 Hz sampling frequency.

Visual Details

Specifications and Performance

KWR75 annular force/torque sensor with side connector and general specification panel
The KWR75 sensor diameter is 75 mm. The stated overload rating is 300%.

Dimensions and Construction

KWR75 tool-side and mounting-side dimensions with KWR75A–KWR75F specification table
The Fx and Fy force ranges are KWR75A: 50 N; KWR75B: 200 N; KWR75C: 350 N; KWR75D: 500 N; KWR75E: 30 N; KWR75F: 100 N. The Fz force ranges are KWR75A: 50 N; KWR75B: 200 N; KWR75C: 500 N; KWR75D: 700 N; KWR75E: 30 N; KWR75F: 100 N.

Application Examples

Force-sensing application collage for assembly, surface finishing, testing and rehabilitation
Medical detection is a listed application. Automobile gearbox assembly is a listed application.

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