Twin Roller Tester
TwinRoller-3000

Traction, Roller Contact Fatigue, Wear,
Pure Rolling, Pure Sliding, Combo Rolling Sliding

Research and Quality Control

Automation and Analysis• ElastohydrodynamicIntroduction

lubrication

Independent Control of Both Rotations
Servo-controlled high torque, precise rotation motors• Gear lubricants,
Wide Load Range - Nano and Micromaterials• Surface treatments• Hydraulic fluids• PittingLoad cells with forces from 1 N to 8000 N

In-line 3D Optical Inspection
Generate sub-nm 3D images of the surface during the test

• Rail friction

Environmental Control• Rolling mill• Sliding-rolling contact

Control temperature with high-resolution controllers• Traction coefficient

Custom Sample Holders• Traction fluids

Unique design to allows for wide sample sizes

Active Feedback Loop Control

Two Independently Controlled High Speed Rollers
Several In-line Sensors to Monitor Real Time Surface Interactions

FBEC
DFA

Page 2Rtec-Instruments’ TwinRoller-3000
is an ideal twin roller machine tostudy traction, wear, and rolling
contact fatigue under various
combinations of rolling andsliding. The tester comprises
two high torque independently
controlled servo motors with anopen platform architecture thatallows easy access. Force is applied
using electro-servo drives. The
tests are done under controlledenvironmental conditions andrun dry and lubricated setups.
Lubricants can be contained in acontainer or circulated during thetest. Fully automated test programs
and advanced controllers allow
high repeatability and precision
measurements.

APlatform

B

Torque Sensor

CRollers

DMotorE

Force Sensors

F

EnvironmentalControl

The HFRR tester comes with closedloop active feedback controls overmany parameters. The rotation
speed is controlled using servocontrolled
feedback,allowing
constant or changing RPM testing.
The applied force is controlledduring the test using electro-servo
drives. The force is measured using
high-precision force sensors withnegligible drift while operating atconstant or linear changing force
profiles. The tester comes withseveral environmental control
options. The advanced temperature
controller allows temperature
measurement at multiple points
simultaneously.

Accurate determination offailure events

The tester can accommodate
various in-line monitoring sensors
to quantify real-time surface

dynamics. A few commonly usedsensors are:a) Torque Sensor - Patented highresolution in-line dynamic torquesensor to monitor change in
generated frictional forces.
b) Acoustic Emission - Widefrequency sensors to detect crack
initiation points during the test.

2 Rollers During A Test

Ease of use and automation

The instrument comes standard
with a powerful set of software,including tester control, postanalysis, and imaging. Each test
can be controlled by a series ofcommand blocks forming a protocol
or “recipe.” The data can be export
into many formats, including ASCII
format.
The software allows the user tostop the test using logic based on
signals from several in-line sensors.
For example, the user can put thestop test condition as - “Whenfriction increases by 30% or when
the acoustic sensor shows a failure
initiation signal, stop the test”. Thiscondition allows the user to doa post-analysis of the sample themoment failure starts to happen.
The TwinRoller-3000 has advanced
high speed, low noise, fast feedback,multiple channels, and the highest
data acquisition rate (200 kHz)
controllers.

Data Showing
Friction vs. Sliding
Rolling Ratio

Top View of theTwinRoller-3000

Applications

Broad testing conditions allow
the TwinRoller-3000 to be used
across several applications such as
automotive, aerospace, lubricant,railways, coatings, EV vehicles,motors, turbines, and much more.

Software Interface
Page 3

Platform Specification
Loading Stage•Motion resolution: 0.1 µm•Maximum speed: 1 mm/s

Load•Max load: 5000 N / 8000 N*

Computer console•Latest Windows OS•LCD monitor•16 bit data acquisition*Higher ranges available												Additional Sensors•Acoustic emission•Eddy current•In-line Wear
•Potentiostat

Rotary Drive

Facilities Requirement•Power Requirements:
220 / 380 / 480 VAC

Environmental•-35 °C to 150 °C•Dry or with liquids•Pure rolling•Pure sliding•0-200% Sliding/rolling ratio•Standard torque 60 Nm*•Standard speeds up to 3000/6000 RPM*
•30 to 60 mm diameter*																																						Rtec-Instruments OfficeRtec-Instruments Inc
USA
1810 Oakland Road, Ste B
San Jose, CA, 95131, USA +1 408 708 9226
info@rtec-instruments.com

Rtec-Instruments, CN
China
2nd Floor, Building 3, 69 Olympic St
Jianye District, Nanjing, China, 210019
 +86 25 83210072, +86 18013892749
info@rtec-instruments.cn

Rtec-Instruments SAEurope
Rue Galilée 6,
1400 Yverdon-les-Bains, Switzerland
 +41 24 552 02 60
info.eu@rtec-instruments.com

Rtec-Instruments, JPJapan
Tokatsu Techno Plaza, Rm 409
5-4-6 Kashiwanoha, Kashiwa-shi,
Chiba, Japan, 227-0882
 +81 50 5896 9916
info.jp@rtec-instruments.com

www.rtec-instruments.com

TwinRoller-3000-2023-A-02A-EN

2023 Rtec-Instruments Product Catalogue.
All rights reserved.
All specifications are typical and subject to change without notice.

Agent / distributor