HSD

Main product features

Surface speeds up to 60 m/s.

Independently driven discs to achieve slide roll ratios (SRR’s) between -10000 and +10000 %.

Load between 10 and 90 N achieving 1.3 GPa max. Hertz pressure with standard specimens.

Traction measurement using a calibrated load cell with mN precision.

Micron-precise wear measurement.

A temperature-controlled stainless steel fluid bath with embedded heaters (ambient to 150°C) and cooling channels (for use with optional external cooler).

Temperature measurement by two PT100 platinum resistance thermometers with sub-0.1°C resolution, allowing control of lubricant or chamber temperature.

Real-time monitoring of vibration.

Fully automated operation via the HSD PC software

Fully electrically isolated shafts and out-of-the-box support for the optional EC System accessory.

Optional SLIM system for in-situ tribofilm measurement.

External cooler option for below-ambient testing, and/or to remove heat at high speeds.

The HSD is a twin-disc instrument designed for high-speed testing of friction and wear in non-conformal contacts. It reaches surface speeds up to 60 m/s and offers full control over load, slide-roll ratio, and temperature. With continuous wear monitoring, high-resolution traction measurement, and a configurable five-port test chamber, the HSD enables precise emulation of demanding applications such as EV transmissions and high-speed rotating machinery. It provides a platform for the development, validation, and characterisation of lubricants, additives, and materials under extreme operating conditions.

Applications

Lubricant evaluation for EV transmissions, turbines, and high-speed spindles
Fundamental research into high-shear effects on friction and tribofilm growth
Validation of thermal elastohydrodynamic lubrication (EHL) models
Testing alternative lubricants such as emulsions and water-based fluids
Studying starvation, lubricant delivery, and foaming in high-speed contacts

Speed	0.5 - 62.5 m/s (60 m/s max at 8% SRR)
Slide/Roll Ratio	0 % to ± 10000 %
Load	10N - 90 N (up to 50 N stationary reverse load against SLIM mapper window)
Contact Pressures	Up to 1.3 GPa (standard 10 mm crown steel-on-steel) or 2.0 GPa (3 mm crown steel-on-steel)
Temperature Range	Ambient to 150 °C (below ambient with optional oil cooler)
Test Sample Volume	30 ml (chamber volume 100 ml)
Power Supply	100-240 VAC, 50-60 Hz
Dimensions (h x w x d)	415 mm x 420 mm x 612 mm
Weight	45 kg

Main product features

Applications

HSD Key Performance Specifications

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