---
title: Twin Disk - Roller on Roller Tribometer
---

[![Ducom - Logo - Full - Vector (90 Gray and Light Blue-Inverted) - PNG](https://www.ducom.com/hs-fs/hubfs/DUCOM/Logos/Ducom%20Logos/Ducom%20-%20Logo%20-%20Full%20-%20Vector%20(90%20Gray%20and%20Light%20Blue-Inverted)%20-%20PNG.png?width=925&height=246&name=Ducom%20-%20Logo%20-%20Full%20-%20Vector%20(90%20Gray%20and%20Light%20Blue-Inverted)%20-%20PNG.png "Ducom - Logo - Full - Vector (90 Gray and Light Blue-Inverted) - PNG")](https://www.ducom.com?hsLang=en)

- Products
- Services
- Resources 
    - [Blog](https://blog.ducom.com)
    - [Tribology Discussions](https://lp.ducom.com/tribology-discussions)
- Company 
    - [About Us](https://www.ducom.com/about-ducom-instruments)
    - [Locations](https://www.ducom.com/company-contact-us)
    - Support 
          - [After Sales Support](https://www.ducom.com/support)
          - [Instrument Service Plans](https://www.ducom.com/instrument-service-plan)

#### General Tribology

- [Universal Tester - UNITEST](https://www.ducom.com/universal-tester-unitest)
- [Multi Capability Tribometer - POD 4.0](https://www.ducom.com/multi-capability-tribometer-pin/ball-on-disk)
- [Vacuum Tribometer - VT 3.0](https://www.ducom.com/vacuum-tribometer)
- [Abrasion Tester - Dry and Slurry](https://www.ducom.com/abrasion-tester)
- [Erosion Tester - Air Jet](https://www.ducom.com/air-jet-erosion-tester)
- [Erosion Tester - Slurry Jet](https://www.ducom.com/slurry-jet-erosion-tester)
- [Erosion Tester - Water Droplet](https://www.ducom.com/water-droplet-erosion-tester)
- [Twin Disk Tribometer](https://www.ducom.com/twin-disk-roller-on-roller-tribometer)
- [BioTribometer](https://www.ducom.com/biotribometer)

#### Lubricant Tribology

- [Four Ball Tester (Desktop)](https://www.ducom.com/four-ball-tester-fbt-3)
- [Four Ball Tester (Standard)](https://www.ducom.com/four-ball-tester-tr-30-series)
- [High Frequency Reciprocating Rig (HFRR)](https://www.ducom.com/high-frequency-reciprocating-rig-hfrr)
- [KRL Shear Stability Tester](https://www.ducom.com/krl-shear-stability-tester)
- [Low Temperature Torque Tester](https://www.ducom.com/low-temperature-torque-tester)

#### Petroleum Testers

- [Flash Point Tester - Pensky Martens](https://www.ducom.com/pensky-martens-flash-point-tester)
- [Flash Point Tester - Abel](https://www.ducom.com/abel-flash-point-tester)
- [Flash Point Tester - Cleveland](https://www.ducom.com/cleveland-flash-point-tester)
- [Freezing Point Tester](https://www.ducom.com/freezing-point-tester)
- [Cloud Point Tester](https://www.ducom.com/cloud-and-pour-point-tester)
- [Pour Point Tester](https://www.ducom.com/pour-point-tester)
- [Roll Stability Tester](https://www.ducom.com/roll-stability-tester)
- [Noack Volatility Test Apparatus](https://www.ducom.com/noack-volatility-tester)
- [BOCLE - ATF Fuel Lubricity Tester](https://www.ducom.com/product-ball-on-cylinder-lubricity-evaluator-bocle)
- [Shear Stability Tester (Diesel Injector)](https://www.ducom.com/product-shear-stability-tester-diesel-injector)

#### See our full range of products

[![Explore All Our Products](https://no-cache.hubspot.com/cta/default/5735947/8c0055af-2ff0-4aad-aa83-42dcde0c56f4.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/8c0055af-2ff0-4aad-aa83-42dcde0c56f4)

#### MOOHA - Digital Lab Assistant

MOOHA is an A.I. enabled digital lab assistant that can assist you with automatically logging data, maintaining an audit trail, performing statistical analysis and accessing data and instrument health and status instantly via a secure encrypted interface.

[![Learn more about MOOHA](https://no-cache.hubspot.com/cta/default/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46)

#### Ducom Test Lab

The Ducom Test Lab can be an extension of your quality or R&D department. Our experienced and knowledgeable application scientists and lab technicians can help you with finding the right test methods, designing test programs and delivering results. 

[![Contract Test Lab](https://no-cache.hubspot.com/cta/default/5735947/17c38921-6c5f-4d81-bd5d-e810fb2b1b68.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/17c38921-6c5f-4d81-bd5d-e810fb2b1b68)

#### Knowledge

- [Blog](https://blog.ducom.com)
- [E-Books](https://www.ducom.com/e-books)

#### Events

- [WEBINAR | Tribology Discussions](https://lp.ducom.com/tribology-discussions)
- [Conferences and Tradeshows](https://www.ducom.com/conferences-and-tradeshows)

#### Company

- [About Us](https://www.ducom.com/about-ducom-instruments)
- [Locations](https://www.ducom.com/company-contact-us)

#### Work with us

- [Job Openings](https://www.ducom.com/careers)
- [Become a sales partner](https://lp.ducom.com/distributor-training)

#### After Sales Support

- [Get Support](https://www.ducom.com/support)
- [Instrument Service Plans](https://www.ducom.com/instrument-service-plan)

[![Ducom - Logo - Full - Vector (90 Gray and Light Blue-Inverted)](https://www.ducom.com/hs-fs/hubfs/DUCOM/Logos/Ducom%20Logos/Ducom%20-%20Logo%20-%20Full%20-%20Vector%20(90%20Gray%20and%20Light%20Blue-Inverted).png?width=564&height=150&name=Ducom%20-%20Logo%20-%20Full%20-%20Vector%20(90%20Gray%20and%20Light%20Blue-Inverted).png "Ducom - Logo - Full - Vector (90 Gray and Light Blue-Inverted)")](https://www.ducom.com/www.ducom.com?hsLang=en)

- Products
- Services
- Resources 
    - [Blog](https://blog.ducom.com)
    - [Tribology Discussions](https://lp.ducom.com/tribology-discussions)
- Company 
    - [About Us](https://www.ducom.com/about-ducom-instruments)
    - [Locations](https://www.ducom.com/company-contact-us)
    - Support 
          - [After Sales Support](https://www.ducom.com/support)
          - [Instrument Service Plans](https://www.ducom.com/instrument-service-plan)

#### General Tribology

- [Universal Tester - UNITEST](https://www.ducom.com/universal-tester-unitest)
- [Multi Capability Tribometer - POD 4.0](https://www.ducom.com/multi-capability-tribometer-pin/ball-on-disk)
- [Vacuum Tribometer - VT 3.0](https://www.ducom.com/vacuum-tribometer)
- [Abrasion Tester - Dry and Slurry](https://www.ducom.com/abrasion-tester)
- [Erosion Tester - Air Jet](https://www.ducom.com/air-jet-erosion-tester)
- [Erosion Tester - Slurry Jet](https://www.ducom.com/slurry-jet-erosion-tester)
- [Erosion Tester - Water Droplet](https://www.ducom.com/water-droplet-erosion-tester)
- [Twin Disk Tribometer](https://www.ducom.com/twin-disk-roller-on-roller-tribometer)
- [BioTribometer](https://www.ducom.com/biotribometer)

#### Lubricant Tribology

- [Four Ball Tester (Desktop)](https://www.ducom.com/four-ball-tester-fbt-3)
- [Four Ball Tester (Standard)](https://www.ducom.com/four-ball-tester-tr-30-series)
- [High Frequency Reciprocating Rig (HFRR)](https://www.ducom.com/high-frequency-reciprocating-rig-hfrr)
- [KRL Shear Stability Tester](https://www.ducom.com/krl-shear-stability-tester)
- [Low Temperature Torque Tester](https://www.ducom.com/low-temperature-torque-tester)

#### Petroleum Testers

- [Flash Point Tester - Pensky Martens](https://www.ducom.com/pensky-martens-flash-point-tester)
- [Flash Point Tester - Abel](https://www.ducom.com/abel-flash-point-tester)
- [Flash Point Tester - Cleveland](https://www.ducom.com/cleveland-flash-point-tester)
- [Freezing Point Tester](https://www.ducom.com/freezing-point-tester)
- [Cloud Point Tester](https://www.ducom.com/cloud-and-pour-point-tester)
- [Pour Point Tester](https://www.ducom.com/pour-point-tester)
- [Roll Stability Tester](https://www.ducom.com/roll-stability-tester)
- [Noack Volatility Test Apparatus](https://www.ducom.com/noack-volatility-tester)
- [BOCLE - ATF Fuel Lubricity Tester](https://www.ducom.com/product-ball-on-cylinder-lubricity-evaluator-bocle)
- [Shear Stability Tester (Diesel Injector)](https://www.ducom.com/product-shear-stability-tester-diesel-injector)

#### See our full range of products

[![Explore All Our Products](https://no-cache.hubspot.com/cta/default/5735947/8c0055af-2ff0-4aad-aa83-42dcde0c56f4.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/8c0055af-2ff0-4aad-aa83-42dcde0c56f4)

#### MOOHA - Digital Lab Assistant

MOOHA is an A.I. enabled digital lab assistant that can assist you with automatically logging data, maintaining an audit trail, performing statistical analysis and accessing data and instrument health and status instantly via a secure encrypted interface.

[![Learn more about MOOHA](https://no-cache.hubspot.com/cta/default/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46)

#### Ducom Test Lab

The Ducom Test Lab can be an extension of your quality or R&D department. Our experienced and knowledgeable application scientists and lab technicians can help you with finding the right test methods, designing test programs and delivering results. 

[![Contract Test Lab](https://no-cache.hubspot.com/cta/default/5735947/17c38921-6c5f-4d81-bd5d-e810fb2b1b68.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/17c38921-6c5f-4d81-bd5d-e810fb2b1b68)

#### Knowledge

- [Blog](https://blog.ducom.com)
- [E-Books](https://www.ducom.com/e-books)

#### Events

- [WEBINAR | Tribology Discussions](https://lp.ducom.com/tribology-discussions)
- [Conferences and Tradeshows](https://www.ducom.com/conferences-and-tradeshows)

#### Company

- [About Us](https://www.ducom.com/about-ducom-instruments)
- [Locations](https://www.ducom.com/company-contact-us)

#### Work with us

- [Careers](https://ducom.freshteam.com/jobs)
- [Become a sales partner](https://lp.ducom.com/distributor-training)

#### After Sales Support

- [Get Support](https://www.ducom.com/support)
- [Instrument Service Plans](https://www.ducom.com/instrument-service-plan)

Search

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# ROLLER ON ROLLER TRIBOMETER

#### Roller on roller with pure sliding to rolling contact stress, block on roller, pin on roller and ball on roller configurations on a single platform.

[![Contact Us](https://no-cache.hubspot.com/cta/default/5735947/ae754668-c424-4626-b943-daa047ad5c97.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/ae754668-c424-4626-b943-daa047ad5c97)

![Roller on Roller - Slide and Roll - GIF](https://www.ducom.com/hs-fs/hubfs/DUCOM/Products/Roller%20on%20Roller/Videos%20and%20Images/Roller%20on%20Roller%20-%20Slide%20and%20Roll%20-%20GIF.gif?width=600&height=336&name=Roller%20on%20Roller%20-%20Slide%20and%20Roll%20-%20GIF.gif "Roller on Roller - Slide and Roll - GIF")

## Servo Controlled Roll and Slide

The powerful and accurate servo controlled speed and load control

- [About](https://www.ducom.com/twin-disk-roller-on-roller-tribometer#tab1)
- [Specifications](https://www.ducom.com/twin-disk-roller-on-roller-tribometer#tab2)
- [Contact Geometries](https://www.ducom.com/twin-disk-roller-on-roller-tribometer#tab3)
- [Applications](https://www.ducom.com/twin-disk-roller-on-roller-tribometer#tab4)

## About the Roller on Roller Tribometer

Roller on roller features independently driven twin disc configuration offering rolling-sliding contacts with a wide range of contact pressures.

The roller on roller set up is widely accepted as a reliable precursor to FZG tests.

Being modular, multiple contact configurations like block on ring, ball on ring, conformal contacts are also possible, making it a truly multifunctional tribometer that can be used for evaluating materials and lubricants used in rolling element bearings, gears and rail-wheel applications.

## Technical Specifications

- Upper specimen: Roller: 47 mm in diameter, 10 mm wide (flat and crowned roller). Test block: 6.35 x 6.35 x 6.35 mm
- Lower specimen: Roller: 47 mm in diameter, 10 mm wide (flat roller)
- Speed: 2 to 2000 rpm
- Normal load: 0.1 to 8 kN (automatic loading)
- Temperature: Up to 120 °C (lubricated conditions). Up to 700 °C (dry conditions)

## Variable Contact Geometries

Multifunctional system capable of changing the test configuration from line contact (roller on roller) to area (pin on roller or block on roller) or point (ball on roller) contact. Along with the ease of operation, it helps to achieve high throughput research.

![Roller on Roller - Contact Geometries - Illustration](https://www.ducom.com/hs-fs/hubfs/Roller%20on%20Roller%20-%20Contact%20Geometries%20-%20Illustration.png?width=480&name=Roller%20on%20Roller%20-%20Contact%20Geometries%20-%20Illustration.png)

 

## Application Examples

- Screening of lubricants for high load power transmission systems at different slip ratios (i.e. gear oils).
- Investigate the tribological behavior of lubricants and steel interaction up to 120°C.
- Study the role of material structure in its friction and wear resistance behavior.
- Rolling contact fatigue behavior of materials used in bearings and railway wheels. Read more about [**White Etching Layer: A Risk For High Speed Railways and Urban Metros.**](https://blog.ducom.com/twindisk-railways?hsLang=en)
- High-temperature tribology (up to 700°C) of materials used in metal forming.

## Product Features

## UNMATCHED SPEED CONTROL

The speed of each roller is controlled independently of each other using two servo motors. Therefore, variable slide to roll ratio (0 to 200%) can be achieved by setting different spindle speeds for two rollers. The motion direction can be set to clockwise or counterclockwise to simulate lubricant entrainment and reverse entrainment (starvation) conditions.

![Roller on Roller - Slide and Roll - GIF](https://www.ducom.com/hubfs/DUCOM/Products/Roller%20on%20Roller/Videos%20and%20Images/Roller%20on%20Roller%20-%20Slide%20and%20Roll%20-%20GIF.gif)

![Roller on Roller - Friction - GIF](https://www.ducom.com/hubfs/DUCOM/Products/Roller%20on%20Roller/Videos%20and%20Images/Roller%20on%20Roller%20-%20Friction%20-%20GIF.gif)

## FRICTION TORQUE AND LINEAR WEAR SENSORS

Friction torque is generated during the motion of the rollers in contact. This friction torque is acquired by a torque sensor. Linear displacement of the rollers due to creep and wear is measured using a linear variable differential transducer (LVDT) fixed to the stationary block on the top spindle assembly.

## AUTOMATIC LOADING

The twin disc tribometer comprised of two parallel spindles where each spindle is driven by a variable speed motor, automated loading unit, heating unit, friction torque sensor and linear wear sensor. 

The servo controlled loading system provides a wide range of contact pressures and flexibility of continuous, ramped and custom load profiles. 

![RoR_Load GIF](https://www.ducom.com/hubfs/DUCOM/Products/Roller%20on%20Roller/Videos%20and%20Images/RoR_Load%20GIF.gif)

![Roller on Roller - In Testing - GIF](https://www.ducom.com/hubfs/DUCOM/Products/Roller%20on%20Roller/Videos%20and%20Images/Roller%20on%20Roller%20-%20In%20Testing%20-%20GIF.gif)

## Temperature Measurement and Control

The experiments can be conducted in lubricated or dry conditions. Temperature in the oil cup is managed using embedded heaters and temperature sensors. In the case of dry test conditions, a high temperature module is available as an option for higher temperatures.

![Compatible With Mooha - Icon - White](https://www.ducom.com/hubfs/DUCOM/Products/Mooha%204.0/Videos%20and%20Images/Compatible%20With%20Mooha%20-%20Icon%20-%20White.png)

Industry 4.0 Ready

A.I Power Lab Assistant

## MOOHA - THE DIGITAL ASSISTANT FOR YOUR LAB

MOOHA is an A.I. enabled digital assistant that can be used together with, or in place of your Laboratory Information Management System (LIMS). It has powerful device management, reporting, statistics and support functionalities.

[![Learn more about MOOHA](https://no-cache.hubspot.com/cta/default/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46.png)](https://cta-redirect.hubspot.com/cta/redirect/5735947/78fb441a-de0c-4a9e-bf49-85bbcd080e46)

**Questions? **

Our experienced and knowledgeable staff can help you.

 

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### Ducom Instruments

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