Collaborative Robot Torque Sensor Mount

Collaborative robots rely on torque sensors to maintain safety, perform high-resolution force control, and enable compliant interaction. However, mounting solutions are often the weakest mechanical link, introducing error sources that degrade sensor output. The Collaborative Robot Torque Sensor Mount addresses this by offering a mechanically optimized, thermally stable, and dynamically tuned interface that preserves the integrity of torque data under real-world operational stressors. 

Material

Aluminum 7075-T6, Titanium (Grade 5), Stainless Steel (17-4PH)

Dimensional Tolerances

Sensor Fit – ±0.01 mm; Robot/Tool Interface – ±0.02 mm; Overall Geometry – ±0.05 mm

Robot Flange Mounting

Bolt Circle – ISO 9409-1 (or custom); Pilot Diameter – H7/h6 fit; Threads – M6–M10 (Class 8.8)

Tool Mounting Pattern

Bolt Circle – Custom to tool; Dowel Pins – ±0.005 mm position; Hole Tolerance – H7 (reamed)

Flatness/Parallelism

Robot Side – ≤0.01 mm/100 mm; Tool Side – ≤0.015 mm/100 mm

Product Description

Differential thermal expansion between sensor housings and robot arms creates internal stress gradients that lead to signal drift and long-term degradation in feedback accuracy. The Collaborative Robot Torque Sensor Mount is constructed using alloys with tightly matched coefficients of thermal expansion to the adjacent components, minimizing strain accumulation at the sensor interface. This alignment prevents mechanical bias in the strain field and ensures consistent sensor baselining throughout thermal cycles, especially during extended collaborative operation. 

Concentricity/Alignment

Flange-to-Tool Axis – ≤0.02 mm TIR; Sensor Bore Runout – ≤0.01 mm

Surface Finish

Mounting Faces – Ra ≤0.4 µm (ground); Non-Critical – Ra ≤0.8 µm

Burr-Free Requirement

Laser-Deburred (ISO 13715 compliant); Edge Radius – 0.1–0.3 mm

Protective Coating

Anodizing (Type III, 25–50 µm); Passivation (stainless steel); Non-Conductive Coatings

Certification Standards

ISO 9409-1 (Robot Mounting), ISO 13849 (Safety), RoHS/REACH Compliant

Technical Advantages

Unintended off-axis loads, radial forces, and structural vibrations can couple into the torque sensor and distort the output. The Collaborative Robot Torque Sensor Mount integrates multi-directional load decoupling through geometric features that isolate axial torque transmission from other mechanical vectors. Using topology optimization and strain isolation paths, the mount enables the torque sensor to respond solely to the intended input axis, reducing signal contamination and improving control loop stability in multi-axis collaborative tasks. 

Resonant frequencies within the sensor-mount assembly can be excited by rapid robot motions, introducing transient distortions in torque readings. The Collaborative Robot Torque Sensor Mount undergoes modal analysis to shift structural resonance points outside the robot’s frequency envelope. Incorporating mass damping layers and tuned stiffness-to-mass ratios, the mount provides stable dynamic behavior, preventing resonance amplification and maintaining linear torque feedback during high-speed collaborative movement. 

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Industry Applications

Precision Electronic Assembly

Enables high-resolution force feedback during connector insertion, ensuring controlled engagement force and protecting delicate PCB-mounted components. 

Orthopedic Surgical Robotics

Supports accurate torque control in joint reaming and implant positioning, maintaining compliance with sub-millimeter patient-specific anatomical constraints. 

Battery Pack Torque Validation

Maintains calibrated torque control during high-density cell array assembly, preventing over-compression or terminal deformation in EV battery modules. 

Haptic Feedback Systems

Facilitates real-time force-torque signal stability in dual-arm teleoperation environments, improving control bandwidth and signal-to-noise performance. 

Force-Guided CNC Deburring

Ensures uniform contact force between tool and part surface in compliant edge finishing applications with varying surface curvature and density. 

Automated Screwdriving Stations

Provides axial torque measurement for adaptive tightening routines, preventing thread stripping or under-torque in lightweight alloy or composite housings. 

 

Collaborative Robot Torque Sensor Mount

Precision Alignment and Backlash Elimination

Microscopic misalignments and mechanical backlash at the mounting interface can introduce angular errors and axial offsets that skew torque measurements. The Collaborative Robot Torque Sensor Mount maintains sub-15-micron coaxiality and flatness across mating surfaces, with dowel-aligned locating features that eliminate play. This precision ensures that the torque sensor’s measurement axis is maintained under all loading conditions, eliminating the need for post-installation digital calibration or error compensation. 

Unexpected external forces—such as collisions or actuator stalls—can result in torque overloads that damage the sensor or its internal strain elements. The Collaborative Robot Torque Sensor Mount offers integrated mechanical stops and shear limiters that engage before critical torque levels are transmitted to the sensor. These built-in safety thresholds are analytically derived to protect sensor internals while preserving system responsiveness, enabling the sensor to remain functional even after sudden mechanical events. 

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional accuracy for Collaborative Robot Torque Sensor Mounts across different robot platforms?

Frigate uses CNC-machined datum references with tolerances within ±10 microns to ensure positional repeatability. All sensor mounts are validated using CMM inspection for concentricity, flatness, and flange alignment. The mounts are designed to match ISO flange standards used by major collaborative robot OEMs. This allows seamless integration without requiring custom shims or adapters.  

What surface treatments does Frigate apply to the torque sensor mounts for performance reliability?

Frigate applies hard anodizing or electroless nickel plating based on application requirements, providing surface hardness and oxidation resistance. These treatments reduce wear at contact interfaces and prevent fretting corrosion during repetitive motion cycles. Coating thickness is controlled within ±2 microns to avoid affecting parallelism and axial fit. This ensures stable clamping force and consistent sensor contact pressure over time. 

How does Frigate design its Collaborative Robot Torque Sensor Mounts to avoid torsional compliance errors?

Each mount is FEA-validated for torsional stiffness across the expected torque range of the robot. Material cross-sections are designed to limit angular deflection under peak loading. This keeps the sensor’s axis of measurement aligned during dynamic maneuvers. Frigate ensures that torsional compliance remains below 0.01° at full-scale torque to prevent signal distortion. 

Can Frigate’s mounts accommodate torque sensors with integrated signal conditioning electronics?

Yes, Frigate considers internal cable routing, shielding paths, and electromagnetic isolation in its mount designs. Cutouts and channels are included for sensors with embedded PCBs or connectors. The design avoids sharp bending radii or EMI hotspots that could interfere with signal conditioning. This ensures data integrity while maintaining full mechanical protection. 

What measures does Frigate take to ensure mechanical zero is preserved after repeated mount disassembly?

Frigate uses precision-ground dowel pins and asymmetric mounting patterns to enforce consistent alignment during every reassembly. The interface remains within ±5 microns of the original position even after multiple cycles. This repeatability eliminates the need for recalibration or axis remapping in most robotic applications. All mounts undergo endurance validation for at least 500 assembly-disassembly cycles. 

 

 

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

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Collaborative Robot Torque Sensor Mount

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