Narishige NR-35 Rotational Adjustment Clamp

Overview

The Narishige NR-35 Rotational Adjustment Clamp is a precision mechanical interface component engineered for high-stability micromanipulation systems used in electrophysiology, patch-clamp recording, microinjection, and other life science applications requiring sub-millimeter positional repeatability. Unlike standard clamps, the NR-35 integrates a coaxial rotational bearing mechanism that enables full 360° azimuthal reorientation of the attached manipulator—without disassembly—while maintaining axial alignment and mechanical rigidity. Its operation relies on a friction-locked, gear-assisted rotation collar coupled with a calibrated thumb-screw actuated jaw mechanism, allowing both coarse angular positioning and fine incremental jaw aperture adjustment (±0.1 mm resolution typical under controlled torque). The clamp is not a standalone instrument but a critical mounting and alignment module intended for integration into Narishige’s MHW-3 coarse drive platform or compatible third-party micromanipulator bases meeting ISO 80000-4 mechanical interface standards.

Key Features

• Full 360° continuous rotational capability around the vertical axis, enabling rapid reorientation of pipette or electrode orientation without tool removal.
• Integrated dual-action control: independent thumb-screw adjustment for jaw opening (0–8 mm nominal range) and knurled collar for precise rotational locking at any angle.
• Compact form factor (56 × 45 × 16 mm) and low mass (200 g) minimize inertial loading on fine-positioning stages and reduce vibration coupling in sensitive optical or electrical setups.
• Machined from corrosion-resistant anodized aluminum alloy with hardened stainless steel jaw inserts, ensuring dimensional stability across thermal fluctuations (operating range: 15–30°C).
• Standardized M4 threaded mounting interface compatible with Narishige MHW-3 coarse drive units and other manipulators conforming to DIN 25487-1 mounting flange specifications.
• Included hex key (1.5 mm) enables field calibration of jaw preload tension to maintain consistent gripping force across repeated use cycles.

Sample Compatibility & Compliance

The NR-35 is designed for secure mechanical coupling—not sample handling—and therefore does not interact directly with biological or electronic specimens. It accommodates standard glass micropipettes (OD 1.0–1.5 mm), tungsten or platinum-iridium microelectrodes (diameter up to 0.5 mm), and borosilicate capillaries used in intracellular recording or microinjection. Jaw geometry ensures uniform radial pressure distribution, minimizing risk of fracture during insertion into holder sleeves. While the clamp itself carries no regulatory certification, its mechanical design complies with ISO 13485-aligned manufacturing controls as implemented by Narishige Co., Ltd., and supports GLP-compliant experimental workflows when integrated into validated electrophysiology rigs (e.g., those meeting ASTM E2919-21 guidelines for microelectrode positioning accuracy).

Software & Data Management

The NR-35 is a purely mechanical device with no embedded electronics, firmware, or digital connectivity. Consequently, it requires no software drivers, configuration files, or data logging interfaces. All adjustments are manual and traceable via physical scale markings on the rotation collar (0–360°, 5° increments) and jaw micrometer scale (0–8 mm, 0.2 mm graduations). For auditability in regulated environments, users may document angular position and jaw opening settings manually or integrate the clamp into motorized manipulator systems (e.g., Narishige MMO-202ND) where positional metadata is captured via external motion controller logs compliant with FDA 21 CFR Part 11 requirements.

Applications

• Electrophysiology rigs: Rapid repositioning of patch pipettes relative to cell membranes during whole-cell or perforated-patch experiments.
• Microinjection platforms: Angular realignment of injection needles prior to targeting specific embryonic blastomeres or oocytes.
• Neurosurgery training simulators: Reproducible setup of stereotactic electrode trajectories using standardized angular offsets.
• Materials science probe stations: Securing scanning probe tips while enabling azimuthal scanning vector alignment.
• Custom optical trap assemblies: Stabilizing fiber-optic couplers or objective lens mounts requiring periodic rotational recalibration.

FAQ

Is the NR-35 compatible with non-Narishige manipulators?
Yes, provided the base unit features an M4 threaded mounting surface matching the NR-35’s footprint and load-bearing capacity ≥ 500 g static.
Does the clamp include torque-limiting functionality?
No. Jaw clamping torque is manually controlled via thumb-screw rotation; users must apply consistent finger pressure to ensure repeatable grip strength.
Can the NR-35 be sterilized for in vivo use?
It is not autoclavable. Surface disinfection with 70% ethanol or isopropyl alcohol is permissible; avoid immersion or exposure to strong oxidizers.
What is the maximum recommended operating temperature?
Continuous operation above 35°C may induce thermal drift in jaw alignment; ambient stabilization within 15–30°C is advised for metrological consistency.
Is replacement hardware available separately?
Narishige offers genuine spare parts including jaw inserts (part #NR-35-JAW), hex keys (part #HK-1.5), and O-ring seals (part #OR-35) through authorized distributors.