Hengyi HY-1000N.MU7JKJK Threaded Fastener Friction Coefficient Tester

Overview

The Hengyi HY-1000N.MU7JKJK Threaded Fastener Friction Coefficient Tester is a precision torsion testing system engineered for quantitative mechanical characterization of threaded fasteners under controlled axial-torque coupling conditions. It operates on the principle of simultaneous real-time measurement of applied torque and induced axial clamping force during controlled angular displacement, enabling calculation of frictional partitioning across three critical interfaces: thread flank (μ_thread), bearing surface (μ_underhead), and total system (μ_total). The instrument implements a dual-sensor architecture—high-stability torque transducers (0.02% linearity, 1/500000 resolution) and calibrated load cells—synchronized with a high-fidelity optical encoder-based angular position feedback loop. Its servo-controlled drive system, built around a 5 kW AC motor and precision planetary reducer, delivers stable rotational speeds from 5 to 40 rpm with ±0.5% speed fidelity. Designed for compliance with international fastener performance standards, it supports deterministic derivation of K-factor (torque coefficient), yield torque, proof load, breakaway torque, prevailing torque, and torsional fatigue behavior under static or cyclic loading protocols.

Key Features

• Integrated dual-axis measurement: Simultaneous acquisition of torque (1–1000 N·m), axial force (3–300 kN), and torsion angle (0–100000°, continuous mode optional)
• High-resolution torque sensing: 1/500000 internal resolution with ±0.5% typical accuracy across 0.2–100% of full scale
• ARM32-based embedded control architecture: Real-time deterministic sampling at ≥1 kHz, eliminating PC dependency for core motion control and data capture
• Bi-directional torsional actuation: Programmable clockwise/counterclockwise rotation with overload protection and soft-start ramping
• Modular fixture system: Standardized M8–M22 thread engagement adapters; custom mandrels available for non-standard fastener geometries
• Thermal-stable mechanical frame: Cast-iron base and reinforced column structure ensure <0.01 mm deflection under maximum 1000 N·m load
• Compliance-ready calibration traceability: Factory-certified per ISO 376 and ASTM E4; onboard self-calibration routines for torque and load channels

Sample Compatibility & Compliance

The HY-1000N.MU7JKJK accommodates standard metric fasteners from M8 through M22, including hex bolts, flange screws, locknuts, and prevailing-torque nuts. With optional tooling, it supports UNC/UNF series, aerospace NAS/MS specifications, and custom thread forms (e.g., trapezoidal, buttress). Test protocols strictly adhere to ISO 16047:2019 (determination of torque–tension characteristics and friction coefficients in threaded fasteners), GB/T 3098.9–2002 (mechanical properties of fasteners — torque-clamp force testing), and ASTM F2268 (standard test method for determining the coefficient of friction of externally threaded fasteners). All measurement algorithms implement the three-component friction model defined in VDI 2230 Part 1, separating thread, bearing surface, and total friction contributions. System validation documentation satisfies GLP audit requirements, including electronic signature support and 21 CFR Part 11–compliant audit trails when used with certified software modules.

Software & Data Management

Bundled Hengyi TestMaster v4.2 software provides ISO 17025-aligned test sequence scripting, real-time parameter visualization (torque vs. angle, axial force vs. time, μ_thread vs. rotation count), and automated report generation in PDF/XLSX formats. Raw data export supports ASCII CSV with timestamped metadata (sample ID, operator, environmental temp/humidity, calibration expiry). The software enforces role-based access control (RBAC), mandatory electronic signatures for result approval, and immutable storage of all raw channel data—including intermediate calculations for K-factor and interface-specific friction coefficients. Data integrity safeguards include cyclic redundancy checksums (CRC-32), automatic backup to network drives, and optional integration with LIMS via ASTM E1384-compliant HL7 messaging. All firmware and application binaries are digitally signed and version-locked to prevent unauthorized modification.

Applications

• Quantitative validation of lubricant efficacy on threaded surfaces (e.g., molybdenum disulfide, zinc flake coatings)
• Development and qualification of torque-controlled assembly processes in automotive powertrain and chassis systems
• Root-cause analysis of bolt loosening in wind turbine pitch systems and rail vehicle suspension assemblies
• Material compatibility testing between dissimilar metals (e.g., stainless steel fasteners on aluminum substrates)
• Regulatory submission support for medical device implant fixation systems per ISO 148-1 and ASTM F565
• Research into thread geometry effects (pitch, flank angle, surface roughness) on frictional partitioning
• Quality assurance of cold-formed vs. machined fasteners in aerospace OEM supply chains

FAQ

What standards does this tester directly support for friction coefficient reporting?
It natively implements ISO 16047, GB/T 3098.9–2002, ASTM F2268, and VDI 2230 Part 1 calculation logic for μ_thread, μ_underhead, and μ_total.
Can the system perform cyclic torsional fatigue tests?
Yes—programmable sinusoidal, trapezoidal, or user-defined waveforms up to 10⁶ cycles with real-time crack detection via torque hysteresis monitoring.
Is third-party calibration certification included?
Each unit ships with a UKAS-accredited calibration certificate (ISO/IEC 17025) covering torque, axial load, and angular position channels.
How is axial force applied—hydraulic or electromechanical?
Electromechanical preloading using a synchronized ball-screw actuator, ensuring zero fluid contamination risk and precise force ramping without overshoot.
Does the software support multi-language UI and report output?
English and Chinese UI are standard; additional languages (German, Japanese, Korean) available via licensed localization packs.