NARISHIGE URC-1 Precision Threaded Rod

Overview

The NARISHIGE URC-1 Precision Threaded Rod is a metrology-grade mechanical component engineered for repeatable linear motion transmission and high-fidelity mechanical coupling in laboratory instrumentation, micro-positioning stages, and OEM analytical device assemblies. Designed in strict accordance with ISO metric thread standards (ISO 68-1, ISO 261), the URC-1 implements an M3 × 0.5 mm right-hand external thread profile on a ground stainless steel (AISI 304 equivalent) substrate. Its dimensional stability—achieved via precision centerless grinding and post-machining stress-relief annealing—ensures sub-micron runout control (< 5 µm TIR over full length) and consistent thread engagement depth across mating nuts or threaded bushings. Unlike commodity fasteners, the URC-1 is manufactured to functional tolerance classes (6g external thread per ISO 965-1), prioritizing kinematic repeatability over static clamping force. It serves as a critical actuation interface in applications where axial displacement resolution, backlash minimization, and long-term creep resistance are non-negotiable—such as in piezo-driven sample manipulators, optical path alignment modules, and microfluidic valve actuators.

Key Features

• Precision-ground M3 × 0.5 mm external thread with 6g tolerance class per ISO 965-1, ensuring low-insertion-force engagement and minimal hysteresis during bidirectional rotation
• Ø6 mm × 45 mm cylindrical shank with ≤ 0.005 mm diameter variation over full length, optimized for concentric mounting in bearing-supported linear guides
• AISI 304-equivalent stainless steel substrate, solution-annealed and passivated to ASTM A967 (nitric acid method), providing corrosion resistance in ambient lab environments and compatibility with ISO Class 5–7 cleanroom handling
• Controlled mass of 8 g enables predictable inertial response in motorized positioning systems operating at frequencies up to 10 Hz without resonance excitation
• Traceable manufacturing batch documentation available upon request; conforms to NARISHIGE’s internal QA protocol aligned with ISO 9001:2015 clause 8.5.2 (Identification and traceability)

Sample Compatibility & Compliance

The URC-1 is mechanically compatible with all standard M3-threaded components conforming to ISO 4014/4017 specifications, including brass, phosphor bronze, and stainless steel locking nuts (e.g., NARISHIGE UN-3 series) and self-aligning threaded inserts. It exhibits no galvanic incompatibility when mated with aluminum 6061-T6 or titanium Grade 2 housings under dry or low-humidity conditions. The passivated surface meets RoHS Directive 2011/65/EU Annex II substance restrictions and carries no SVHC (Substances of Very High Concern) per REACH Annex XIV. While not certified to FDA 21 CFR Part 11 (as it is a passive mechanical component), its material certification and process traceability support inclusion in GxP-regulated instrument subsystems requiring documented component provenance.

Software & Data Management

As a passive mechanical element, the URC-1 requires no firmware, driver software, or configuration files. However, its dimensional and material specifications are fully integrated into NARISHIGE’s CAD library (STEP AP214, IGES v5.3) and BOM management templates used by OEM partners for automated bill-of-materials generation and DFM validation. Mechanical tolerance stack-up analyses—including thermal expansion coefficients (17.3 × 10⁻⁶ /°C), Young’s modulus (193 GPa), and yield strength (≥ 205 MPa)—are provided in NARISHIGE’s Engineering Data Pack (EDP-URC-1 Rev. 3.1), accessible via secure partner portal login.

Applications

• Micro-positioning stages in confocal microscopy and atomic force microscopy (AFM) systems requiring < 1 µm step resolution
• Adjustment screws for collimation optics in UV-Vis spectrophotometers and laser cavity alignment fixtures
• Linear actuator spindles in compact syringe pump manifolds and electrophoresis gel casting apparatuses
• Threaded interface elements in ISO-standard vacuum flange adaptors (KF-16/KF-25) for modular vacuum chamber integration
• OEM replacement component for NARISHIGE MM-120 micromanipulator fine-adjustment mechanisms and MN-400 series manipulator base mounts

FAQ

Is the URC-1 compatible with metric M3 nuts from third-party suppliers?

Yes—provided the nut complies with ISO 4014 (hexagon nuts, style 1) or ISO 4032 (heavy hexagon nuts) and specifies property class 8 or higher. Thread engagement depth must exceed 1.5× nominal diameter (≥ 4.5 mm) for optimal load distribution.
Can the URC-1 be used in vacuum environments?

It is suitable for rough and high vacuum (10⁻⁷ mbar) when properly cleaned per ISO 14644-1 Class 5 protocols; outgassing rate is < 1.0 × 10⁻¹⁰ Pa·m³/s per cm² at 23°C (measured per ASTM E595). Bake-out above 150°C is not recommended.
What is the maximum recommended torque for tightening?

0.7–0.9 N·m using a calibrated torque screwdriver (ISO 6789-2:2017 Class A); exceeding 1.0 N·m risks thread deformation or galling in stainless-on-stainless interfaces.
Does NARISHIGE provide calibration certificates for individual URC-1 units?

No—dimensional verification is performed statistically per ISO 2859-1 sampling plans (AQL 0.65); full metrology reports are available only for custom-order batches ≥ 500 units.