HSD

Part Code: HSD

The HSD is a twin-disc tribometer designed to measure friction in non-conformal contacts at surface speeds up to 60 m/s.

  • 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.
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Key FeaturesSpecificationsAccessoriesIndustriesKnowledge

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
  • 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.
Technical Specifications
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

Automotive

  • Lubricity testing of diesel fuels and gasolines
  • Simulating transmission interactions – e.g. piston rings, cams, engine bearings
  • Characterising friction materials for clutch pads

Green Tribology

  • Lubricity testing of new biofuels
  • Developing environmentally acceptable lubricants (EALs)
  • Investigating high-speed traction phenomena in electric vehicles to improve operational efficiency
  • Recreating and analysing failure modes in wind power transmission systems

Industrial

  • Developing and optimising metal working fluid formulations
  • Analysing the interactions between seals and moving components
  • Designing advanced coatings to protect surfaces during operation

Lubricants

  • Developing and optimising lubricant formulations
  • Performance testing of industrial greases
  • Characterising additive performance
  • Validating computational friction and wear models

Powertrain

  • Simulating bearing surface interactions
  • Simulating gear tooth contact behaviour
  • Determining frictional losses within a system and performing efficiency calculations
  • Replicating real-world and extreme contact conditions

Transport

  • Lubricity testing of sustainable aviation fuels
  • Evaluating marine greases and lubricants
  • Developing specialist greases for the rail industry
  • Characterising atmospheric effects on friction and wear

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