Accretech NEX Rs Precision Cylindricity Measuring Instrument

Overview

The Accretech NEX Rs is a high-precision, air-bearing-based cylindricity measuring instrument engineered for metrological-grade evaluation of rotational symmetric components in demanding manufacturing and calibration environments. Designed and manufactured in Japan by ACCRETECH — a globally recognized leader in geometric metrology — the NEX Rs implements a precision rotating spindle architecture coupled with a vertically aligned column and motorized Z-axis to enable comprehensive 3D form analysis. Its measurement principle relies on ultra-stable rotational kinematics combined with high-resolution displacement sensing (typically capacitive or inductive probes), where the workpiece rotates about a highly accurate air-bearing axis while the sensor traverses along the Z-direction. This configuration satisfies ISO 1101, ISO 12181 (roundness), ISO 12180 (cylindricity), and ASME Y14.5 standards for geometric dimensioning and tolerancing (GD&T). The system is optimized for traceable, repeatable assessment of form errors in critical components such as hydraulic pistons, bearing races, precision shafts, aerospace bushings, and medical implant substrates.

Key Features

• Patented offset-type sensor holder eliminates mechanical interference between the probe and R-axis rotation path, enabling unobstructed access to complex geometries including stepped shafts, flanged parts, and recessed features.
• Air-bearing spindle delivers exceptional rotational stability with stated axial and radial accuracy of 0.02 + 3.2H/1000 µm — verified per ISO 230-7 — ensuring minimal motion error contribution across the full 300 mm maximum external diameter range.
• Motorized vertical column supports programmable Z-axis travel and precise probe positioning, facilitating automated multi-section scanning for cylindrical profile reconstruction.
• Maximum rotational speed of 20 rpm balances measurement throughput with vibration suppression, maintaining signal integrity during high-resolution sampling.
• Modular mechanical design accommodates optional accessories including centering chucks, precision v-blocks, and custom fixturing for non-circular or asymmetric workpieces.

Sample Compatibility & Compliance

The NEX Rs accepts cylindrical, conical, and disk-shaped components up to 300 mm in outer diameter and compatible with standard metrology lab environmental conditions (20 ± 1 °C, humidity ≤ 60 % RH, vibration-isolated granite base). It supports GD&T evaluation per ISO 1101, ISO 5459 (datum establishment), and ANSI/ASME B89.3.4M. Calibration traceability aligns with national standards through documented uncertainty budgets compliant with ISO/IEC 17025. The instrument meets CE marking requirements and conforms to IEC 61000-6-2 (immunity) and IEC 61000-6-3 (emission) for electromagnetic compatibility.

Software & Data Management

ACCTee — ACCRETECH’s proprietary integrated metrology software — provides a Windows-native interface built on a file-centric architecture: all measurement configurations, raw data, analysis parameters, and reporting templates are stored within self-contained project files (.acx). ACCTee supports real-time waveform visualization, harmonic decomposition (up to 50th order), filtering (Gaussian, 2CR, phase-corrected), and automated GD&T reporting with pass/fail status against user-defined tolerances. Audit trail functionality records operator ID, timestamp, parameter changes, and calibration events — supporting GLP/GMP workflows and FDA 21 CFR Part 11 compliance when deployed with electronic signature modules and networked domain authentication. Export options include CSV, PDF, XML, and STEP AP242 for integration into PLM and SPC systems.

Applications

• Automotive: Cylinder bore geometry verification, piston ring groove roundness, camshaft lobe profile fidelity.
• Aerospace: Turbine blade root roundness, landing gear pin cylindricity, actuator housing concentricity.
• Medical Devices: Orthopedic implant stem roundness, dental abutment taper conformity, syringe barrel straightness.
• Hydraulics & Pneumatics: Valve spool concentricity, pump housing bore cylindricity, seal groove wall thickness variation.
• Calibration Labs: Verification of reference cylinders, master gages, and step standards per ISO 10012 and ISO/IEC 17025 procedures.

FAQ

What standards does the NEX Rs comply with for roundness and cylindricity measurement?
The system adheres to ISO 12181-1 (roundness), ISO 12180-1 (cylindricity), ISO 1101 (GD&T), and ASME Y14.5 for tolerance specification and evaluation.
Can the NEX Rs measure non-rotational parts such as flat surfaces or angular features?
Yes — via its motorized Z-axis and programmable probe positioning, it evaluates flatness, angular deviation, and end-face runout; however, optimal accuracy is achieved on rotationally symmetric features.
Is ACCTee software validated for regulated industries?
ACCTee supports 21 CFR Part 11 compliance when configured with role-based access control, electronic signatures, and audit logging — subject to site-specific validation protocols.
What is the typical measurement uncertainty for diameter assessment on a 100 mm part?
Uncertainty depends on environmental stability, fixture repeatability, and probe calibration; typical expanded uncertainty (k=2) for diameter measurement under controlled lab conditions is ≤ ±0.3 µm.
Does the system support automated report generation for quality documentation?
Yes — ACCTee enables customizable PDF and Excel reports with embedded graphics, statistical summaries, and GD&T result tables, exportable per customer-defined templates.