Accretech DM45505 Stylus Tip for Contact Profilometers

Overview

The Accretech DM45505 is a high-precision mechanical stylus tip engineered specifically for contact-type profilometers used in nanoscale surface topography and roughness characterization. As a critical consumable component—not a standalone instrument—the DM45505 stylus operates on the principle of physical tracing: a diamond-tipped probe traverses the sample surface under controlled low-force loading (typically 0.5–5 mN), converting vertical displacement into analog voltage signals via a differential inductive transducer. This analog output is digitized and processed to reconstruct 2D cross-sectional profiles or 3D areal maps, enabling quantitative evaluation of parameters including Ra, Rz, Rq, Rsk, Rku, and waviness according to ISO 4287, ISO 11562, and ASME B46.1. Its design prioritizes thermal stability, mechanical rigidity, and minimal tip wear—essential attributes for repeatable traceability in regulated manufacturing environments such as semiconductor wafer inspection, precision mold validation, and medical implant surface certification.

Key Features

• Single-crystal diamond tip with nominal radius of 2 µm—optimized for high-resolution profiling of fine-machined, polished, and electroplated surfaces
• M2.5 threaded shank ensures secure, repeatable mounting and alignment on Accretech SE-series profilometer arms and compatible metrology platforms
• Shank diameter of 3.2 mm and total length of 25 mm provide optimal cantilever stiffness-to-flexibility ratio, minimizing lateral deflection during scanning
• Manufactured and calibrated in Japan under strict ISO 9001-certified production controls; each batch includes traceable calibration documentation
• Compatible with standard force ranges (0.5–5 mN) and scan speeds up to 1 mm/s—supporting both high-throughput QA and high-fidelity R&D applications

Sample Compatibility & Compliance

The DM45505 stylus is validated for use on non-abrasive to moderately hard materials including aluminum alloys, stainless steel, silicon wafers, optical glass, ceramics, and polymer coatings. It is not recommended for highly abrasive surfaces (e.g., sintered carbides or hardened tool steels >65 HRC) without prior tip wear assessment. All measurements performed using this stylus adhere to internationally recognized surface texture standards: ISO 4287 (terms, definitions, and surface parameter symbols), ISO 11562 (filtering methods for profile assessment), and ASME B46.1 (surface texture nomenclature and measurement). When integrated into an Accretech SE350 or SP150 system configured with GLP/GMP-compliant software, the stylus supports audit-ready data generation compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user access control, and full measurement history logging.

Software & Data Management

While the DM45505 itself contains no embedded firmware or software, its performance is fully leveraged through Accretech’s proprietary SURFPAK and SURFPAK-SX analysis suites. These platforms support automated tip calibration routines, multi-segment filtering (Gaussian, phase-corrected, spline), spectral analysis (PSD), and statistical process control (SPC) charting. Raw analog signals from the stylus are acquired at ≥10 kHz sampling rates, ensuring Nyquist compliance for features down to ~0.1 µm spatial wavelength. Data export formats include ASCII (.txt), CSV, and standardized Metrology Data Exchange Format (MDEF) for interoperability with Q-DAS, Minitab, and custom MES integration. All measurement files retain embedded metadata: stylus ID, calibration date, operator ID, environmental conditions (temperature/humidity), and instrument configuration—enabling full metrological traceability per ISO/IEC 17025.

Applications

• Surface finish verification of injection-molded automotive interior components per VW 50185 and GMW14872 specifications
• Waviness assessment of bearing raceways and gear flank profiles for ISO 13565-2 conformance
• Step-height and edge-profile metrology in MEMS fabrication and thin-film device packaging
• Roughness mapping of orthopedic implant surfaces (e.g., Ti-6Al-4V femoral stems) aligned with ASTM F2129 and ISO 14644-1 cleanliness thresholds
• Process capability studies (Cpk/Ppk) for grinding, lapping, and polishing operations in aerospace turbine blade manufacturing

FAQ

Is the DM45505 stylus interchangeable with non-Accretech profilometers?
Yes—provided the host instrument uses a standard M2.5 threaded stylus mount and supports analog LVDT signal input with compatible gain and offset settings. Verification of mechanical clearance and force calibration is required prior to first use.
What is the typical service life of the DM45505 stylus under routine QA conditions?
Under controlled loads (<2 mN) and on surfaces with Ra < 0.8 µm, expected operational life exceeds 500 linear meters of cumulative scan distance. Tip wear must be monitored via periodic calibration artifact scanning (e.g., NIST-traceable step standards).
Does the stylus require recalibration after replacement?
Yes—stylus replacement necessitates full system recalibration, including zero-force offset, sensitivity gain, and tip radius compensation within the SURFPAK software environment.
Can the DM45505 be used for 3D areal measurements?
It is designed for 2D profile acquisition. For true 3D areal topography, Accretech recommends pairing it with a motorized X-Y stage and synchronized data acquisition—though dedicated 3D scanning probes (e.g., DM45510) offer superior efficiency and accuracy.
Is there a certified reference material available for verifying DM45505 performance?
Accretech supplies NIST-traceable calibration artifacts (e.g., SRM 2130 series step-height standards and SRM 2131 roughness standards), which are routinely used in conjunction with the DM45505 for laboratory accreditation audits.