Link RB Rockwell Hardness Tester
| Brand | HOYTOM |
|---|---|
| Origin | Spain |
| Model | Link RB |
| Test Height | 170 mm |
| Compliance | EN ISO 6508, ASTM E18, EN ISO 6506, ASTM E10 |
| Optional Accessories | HOYTOM LHB Digital Brinell Impression Measurement System, USB Digital Microscope (20×/30×/40×), Integrated Data Logging Software |
Overview
The Link RB Rockwell Hardness Tester is a precision-engineered mechanical hardness testing instrument designed and manufactured by HOYTOM in Spain. It operates on the fundamental principle of Rockwell hardness measurement—applying a minor preliminary load followed by a major load using standardized indenter types (diamond cone for HRC/HRB scales or hardened steel ball for HRB/HRF), then measuring the permanent depth deformation under the major load. This method delivers rapid, repeatable, and operator-independent hardness values across metallic materials, heat-treated components, and surface-hardened layers. The Link RB complies fully with international standards including EN ISO 6508-1:2016 and ASTM E18-22 for Rockwell testing, as well as EN ISO 6506-1 and ASTM E10 for Brinell hardness verification when used with optional accessories. Its robust cast-iron frame, precision-ground anvil assembly, and calibrated load application system ensure long-term stability and metrological traceability.
Key Features
- Maximum test height of 170 mm—enabling evaluation of medium-height workpieces such as forged shafts, bearing housings, and machined structural parts.
- Mechanical lever-based load application system with dual-scale capability (Rockwell B and C scales standard; additional scales available via optional indenters).
- Integrated analog dial indicator with parallax-free scale reading and fine-focus adjustment for consistent indentation depth assessment.
- Standardized indenter holder compatible with 120° diamond cone (1.588 mm diameter) and 1/16″ hardened steel ball per ISO 6508 requirements.
- Sturdy base plate with T-slots for secure fixture mounting and repeatable sample positioning.
- Optional HOYTOM LHB Digital Brinell Impression Measurement System—fully portable, USB-powered, and software-integrated for automated Brinell impression analysis.
Sample Compatibility & Compliance
The Link RB accommodates flat, cylindrical, and irregularly shaped specimens within its 170 mm vertical clearance and 200 mm × 200 mm stage area. It supports common industrial materials including carbon steels, alloy steels, aluminum alloys, copper, brass, and cast iron. All hardness readings are traceable to national metrology institutes through HOYTOM’s factory calibration certificates, aligned with ISO/IEC 17025–accredited procedures. The instrument satisfies essential requirements for quality control laboratories operating under ISO 9001, IATF 16949, and aerospace AS9100 frameworks. When configured with the LHB system, Brinell measurements comply with EN ISO 6506-1:2014 and ASTM E10-23, including automatic diameter detection, statistical reporting (mean, SD, CV%), and audit-ready data export.
Software & Data Management
While the base Link RB model operates without embedded electronics, the optional LHB digital measurement suite includes dedicated Windows-compatible software supporting USB 2.0 connectivity to laptops or tablets. The software captures high-resolution images via integrated CMOS sensors, performs sub-pixel edge detection on Brinell impressions, and calculates hardness values using standard formulas (HBW = 0.102 × F / A). All raw images, measurement logs, operator IDs, timestamps, and calibration records are stored in an encrypted local SQLite database. Export formats include CSV, PDF reports (with customizable templates), and XML for integration into LIMS or MES platforms. Audit trail functionality meets FDA 21 CFR Part 11 requirements when deployed with user authentication and electronic signature modules.
Applications
- Quality assurance of heat-treated gears, crankshafts, and camshafts in automotive manufacturing.
- Incoming material inspection for raw stock compliance against supplier specifications (e.g., AISI 4140 annealed vs. quenched & tempered).
- Process validation of case-hardening, nitriding, and induction hardening treatments.
- Routine hardness mapping across weld zones and HAZ (heat-affected zones) in pressure vessel fabrication.
- Research-grade hardness profiling in metallurgical laboratories requiring correlation between microstructure and bulk mechanical response.
- Calibration verification of portable hardness testers using reference blocks certified per ISO 6508-2.
FAQ
Does the Link RB support both Rockwell and Brinell testing natively?
No—the Link RB is a dedicated Rockwell hardness tester. Brinell measurement requires the optional HOYTOM LHB digital system, which functions as a standalone optical module mounted on the same test stand.
Is the instrument supplied with certified reference hardness blocks?
Yes—each unit ships with a set of three NIST-traceable Rockwell reference blocks (HRC 20, 40, 60), individually certified per ISO 6508-2 and accompanied by valid calibration certificates.
Can test data be exported to Excel or ERP systems?
Yes—LHB software exports measurement results in CSV format, enabling direct import into Excel, SAP QM, or Oracle Quality modules. Custom API integration is available upon request.
What maintenance is required for long-term accuracy?
Annual recalibration by an ISO/IEC 17025-accredited laboratory is recommended. Routine checks include indenter geometry verification, anvil flatness assessment, and load verification using deadweight standards.
Is technical support available outside Spain?
Yes—HOYTOM provides global technical assistance via authorized distributors, including remote diagnostics, application engineering consultation, and on-site service contracts.
