LEI-TECH LK-MP200 Single-Plate Dual-Speed Metallographic Grinding and Polishing Machine

Overview

The LEI-TECH LK-MP200 is a single-plate, dual-speed metallographic grinding and polishing machine engineered for precision sample preparation in metallurgical, materials science, and failure analysis laboratories. Designed around Couette-flow-based mechanical material removal principles, it supports sequential or independent grinding and polishing operations through reversible plate rotation and rapid consumable changeover—enabling controlled, reproducible surface planarization of metallic, ceramic, and composite specimens. Its compact benchtop architecture integrates a microprocessor-controlled drive system with real-time speed regulation, ensuring stable torque delivery across the full 0–1400 rpm range. The unit incorporates an integrated water-cooling circuit to maintain specimen temperature below critical thermal thresholds (<60 °C), thereby preserving microstructural integrity—including phase distribution, grain boundary contrast, and precipitate morphology—during abrasive processing. As a CE-compliant, RoHS-conforming instrument, the LK-MP200 meets baseline electrical safety and environmental requirements for use in ISO/IEC 17025-accredited testing facilities.

Key Features

• Single 203 mm diameter grinding/polishing plate with bidirectional (clockwise/counterclockwise) rotation control for optimized abrasive action on diverse material classes
• Infinitely variable speed adjustment (0–1400 rpm) via analog knob, plus four factory-calibrated preset speeds (150, 300, 600, 1000 rpm) for repeatable process standardization
• Quick-release plate mounting mechanism enabling sub-90-second consumable swaps between silicon carbide papers, diamond lapping films, and woven/non-woven polishing cloths
• Integrated water delivery system with adjustable flow rate and splash-resistant nozzle positioning to ensure uniform coolant coverage across the specimen–abrasive interface
• Low-noise (<62 dB(A)) brushless induction motor and vibration-damped base assembly for stable operation in shared laboratory environments
• Microprocessor-based control panel with LED speed display, emergency stop button, and overload protection circuitry compliant with IEC 61000-4-5 surge immunity standards

Sample Compatibility & Compliance

The LK-MP200 accommodates specimens up to 40 mm in diameter and 30 mm in height, supporting standardized preparation workflows aligned with ASTM E3, ISO 15510, and GB/T 13298. It is routinely validated for use with ferrous alloys (e.g., carbon steels, stainless steels), non-ferrous metals (Al, Cu, Ti, Mg), sintered carbides, and brittle ceramics (Al₂O₃, SiC). All wet-process operations comply with OSHA 1910.1200 hazard communication requirements when used with aqueous coolants and pH-neutral lubricants. The machine’s electrical design conforms to IEC 61010-1 for laboratory equipment safety, and its structural housing meets IP22 ingress protection rating for resistance to dripping water and solid objects ≥12.5 mm.

Software & Data Management

While the LK-MP200 operates as a standalone electromechanical instrument without embedded software, its operational parameters are fully documentable within laboratory information management systems (LIMS) or electronic lab notebooks (ELN). Process logs—including speed settings, rotation direction, coolant activation status, and total runtime per specimen—can be manually recorded or captured via external time-stamped video documentation. For GLP/GMP-regulated environments, the unit supports audit-trail-ready workflow integration when paired with digital logbooks compliant with FDA 21 CFR Part 11 requirements. Optional RS-232 serial output (available upon request) enables basic parameter export to external data acquisition platforms.

Applications

• Routine metallographic sectioning preparation for optical microscopy (OM) and scanning electron microscopy (SEM) analysis
• Standardized cross-sectional polishing of weld zones, heat-affected zones (HAZ), and coated substrates per ASTM E112 grain size evaluation protocols
• Surface planarization prior to microhardness testing (Vickers, Knoop) to minimize indentation distortion
• Preparation of fracture surfaces for qualitative ductile/brittle transition assessment
• Research-scale polishing of additively manufactured (AM) metal parts to reveal porosity, unmelted particles, and interlayer bonding quality
• Quality control in foundries, aerospace component suppliers, and third-party certification labs requiring traceable, repeatable specimen conditioning

FAQ

What consumables are compatible with the LK-MP200?
Standard 203 mm diameter abrasive papers (SiC, Al₂O₃), diamond-impregnated lapping films (15–0.25 µm), and synthetic polishing cloths (e.g., napped polyester, woven nylon) are supported.
Is the water-cooling system mandatory during operation?
Yes—continuous coolant flow is required for all grinding steps and recommended for coarse-to-medium polishing stages to prevent thermal damage to microstructure.
Can the LK-MP200 be integrated into automated sample prep lines?
The unit features manual loading/unloading; however, its consistent mechanical repeatability and standardized footprint enable seamless incorporation into semi-automated workflows using robotic end-effectors.
Does LEI-TECH provide method validation support for ISO/IEC 17025 accreditation?
Yes—application engineers supply documented SOP templates, uncertainty budgeting guidance, and calibration traceability documentation aligned with ISO/IEC 17025 Clause 7.7.
What is the warranty coverage and service response protocol?
The LK-MP200 carries a 24-month limited warranty covering parts and labor. Technical support is available 7×24 via remote diagnostics, with on-site service dispatched within 72 business hours in Tier-1 global markets.