Lubricating Grease Roller Stability Tester RST-T200-P4 by TTZH

Overview

The TTZH RST-T200-P4 Lubricating Grease Roller Stability Tester is an engineered laboratory instrument designed to evaluate the mechanical stability of lubricating greases under controlled thermal and rotational stress. Based on the standardized roller test principle—where grease is subjected to repeated compression, shearing, and rolling action between rotating steel rollers—the system quantifies structural degradation through changes in consistency (e.g., penetration loss or phase separation) after defined exposure cycles. This method directly correlates with real-world performance in slow-speed, high-load bearing applications where grease matrix integrity is critical. The RST-T200-P4 operates in strict accordance with ASTM D1831 (“Standard Test Method for Roller Stability of Lubricating Grease”) and SH/T 0122 (“Determination of Roller Stability of Lubricating Grease”), providing reproducible, traceable data for QC laboratories, formulation R&D teams, and third-party testing facilities engaged in lubricant certification and material qualification.

Key Features

• Precision temperature control from ambient to 200 °C with ±0.5 °C uniformity across the roller chamber, achieved via dual-zone PID-regulated heating and high-stability Pt100 temperature sensors calibrated per ISO/IEC 17025 requirements.
• Fixed-speed operation at 165 rpm—matching the nominal speed specified in ASTM D1831—with optional variable-speed drive (100–200 rpm) for extended method development or non-standard evaluations.
• Low-noise mechanical architecture incorporating vibration-damped motor mounting, precision-ground hardened-steel rollers, and sealed bearing assemblies to ensure long-term operational stability and minimal background interference during extended test runs.
• Interchangeable roller sets available in multiple materials (e.g., AISI 52100 chrome steel, stainless steel 440C, or coated variants) to assess compatibility with aggressive additives or specialty base oils without cross-contamination.
• Modular design supports RS485 serial interface integration for external SCADA systems or LIMS connectivity, enabling automated test logging, remote parameter monitoring, and synchronized timestamping aligned with GLP audit trails.

Sample Compatibility & Compliance

The RST-T200-P4 accommodates standard 100 g grease samples loaded into cylindrical aluminum or stainless-steel sample cups (included), with full compatibility across NLGI classes 000 to 6. Its roller geometry and mass (5 kg ± 50 g) conform precisely to dimensional and inertial requirements outlined in ASTM D1831 Annex A1 and SH/T 0122 Clause 5.2. All thermal and rotational parameters are independently verifiable using NIST-traceable calibration artifacts. The instrument meets essential electromagnetic compatibility (EMC) and electrical safety criteria per EN 61326-1 and EN 61010-1, supporting use in ISO/IEC 17025-accredited laboratories. Documentation packages include factory calibration certificates, compliance declarations, and test method validation templates for internal SOP alignment.

Software & Data Management

While the base RST-T200-P4 operates via front-panel digital interface with real-time temperature and elapsed time display, the optional RS485 interface enables bidirectional communication with custom or vendor-supplied PC software. This configuration supports automated start/stop sequencing, dynamic setpoint adjustment, and acquisition of time-stamped temperature and runtime logs. Exported datasets comply with CSV and Excel-compatible formats, facilitating integration into statistical process control (SPC) platforms or electronic lab notebooks (ELNs). When deployed in regulated environments (e.g., automotive OEM supplier labs or API-certified testing centers), the system supports 21 CFR Part 11-compliant user access controls, electronic signatures, and immutable audit trails when paired with validated software middleware.

Applications

• Quality control release testing of finished greases against ASTM D1831 pass/fail thresholds (e.g., maximum allowable penetration change after 100,000 roller revolutions).
• Comparative evaluation of thickener stability across lithium, calcium-sulfonate, polyurea, and clay-based formulations under elevated thermal stress.
• Accelerated aging studies to predict service life in electric motor bearings, wind turbine pitch mechanisms, and off-highway equipment chassis points.
• Supporting API RP 541 and ISO 12922 lubricant specification development through repeatable mechanical shear input.
• Root-cause analysis of grease softening or oil bleed following field failures, correlating lab-scale roller degradation with rheological and microstructural characterization (e.g., FTIR, DSC, or optical microscopy).

FAQ

What standards does the RST-T200-P4 fully support?
ASTM D1831 and SH/T 0122 are natively implemented; instrument geometry, thermal accuracy, and rotational fidelity meet all mandatory clauses and annexes of both methods.
Is calibration documentation provided with shipment?
Yes—each unit ships with a factory-issued calibration certificate covering temperature uniformity, roller speed accuracy, and mass verification, traceable to national metrology institutes.
Can the instrument be integrated into a centralized lab network?
With the optional RS485 interface and compatible software, it supports Modbus RTU protocol for integration into existing laboratory automation frameworks.
What maintenance intervals are recommended?
Roller surface inspection and cleaning every 500 test cycles; motor lubrication and belt tension verification annually; full sensor recalibration recommended every 12 months or per ISO/IEC 17025 internal schedule.
Are sample cups and rollers supplied as consumables?
Standard aluminum sample cups and AISI 52100 steel rollers are included; additional roller sets (stainless, coated) and cup kits are available as configurable accessories.