High Frequency Fretting Rig
HFRR

Fretting, Wear, Linear Friction
Lubricity of Oils, Grease, and Additives

Next Generation HFRR

Introduction

ASTM, ISO, DIN Compliant• Lubricity

Rtec-Instruments’ benchtop highfrequency reciprocating tester tests
the lubricity of diesel fuels andscreens the lubrication performanceof engine oils, additives, and more.

Closed-loop Downforce Control

Real-time measurement and control of downforce. Programmableconstant, linear, or step force profiles.

• Wear• Linear Friction

Closed-loop Environmental Control• Fretting

Humidity, temperature & inert gas for real-life simulation.

High Reliability - Flexure Design

Voice coil-based flexural suspension design without any bearings.

The Smallest Controllable Stroke - 10 µm to 2.8 mm, up
to 200 Hz
Real-time stroke, frequency monitoring, and correction using LVDT.

This next-generation HFRR testingmachine uses programmable force
control (no dead weights). Its uniqueflexure-based design, rigid platform,
in-line friction monitoring at highfrequencies, and fully automated test
programs provide high repeatabilityand precision measurements.

Down Force

The applied force is measured
and controlled in real-time using
a servo-controlled motor. The
real-time force control allows it toperform tests in constant, linear, orstep force profiles. Hence, it can run
both standard and non-standard
tests with ease.

Precise Waveform Control

ABCEDPage 2HF

GA

Enclosure

B

Downforce Control

C

Position Control

D

EnvironmentalControl

E

Voice Coil

FFriction
Measurement

G

Addition In-lineSensors

H

Liquid Containers,
Sample Holder

Without the friction of rolling orbearings, the flexure-based designwith a voice coil actuator provides
the control required for the mostsensitive tests. In addition, thetester uses the most accurate andprecise displacement control in themarket with a 1 nm resolution andmicron level of accuracy.

Accurate Determination
Failure EventsofThe tester has advanced dual piezo
sensors to measure high-frequency
real-time friction. Coupled within-line acoustic emission and anelectrical contact resistance sensor,
the FFT-M accurately determines
failure events during the test.

Standard Compliance

The tester comes with certified
standard oil samples, balls, and disks.

Software

The FFT-M has a Windows-based
computer and an operation anddata analysis software package. The
operation software is a recipe-based
software that allows it to run standard
or previously created standard
programs with a click of a button.
The software provides change force,
temperature, frequency, stroke,time, cycles, and humidity during
each step. It also allows the user todefine endpoints based on several
in-line data that are monitored. The
software provides simple standard
or advanced complex test methods.
The analysis package comes withvisualization and statistical dataanalysis. Multiple files and reports
can be opened for easy comparison.
Data can be stored in binary or ASCIIformat.

3D Wear Scar MarkHigh Frequency Data

Environmental Control

The tester has several environmental
control options, including a closedloop humidity control that uses ahumidifier to reach 5 to 95% RH. In
addition, several temperature ranges
for heating and cooling are available.

Front View of the FFT-M

Applications

Broad testing conditions allow theHFRR Tester to be used acrossseveral applications, such as
automotive, aerospace, lubricant,railways, coatings, turbines, EVvehicles, motors, turbines, and muchmore.

Software Interface

Page 3

Platform Specification
PlatformActuators

Standard Samples•6 mm balls•10 mm diameter disks•More options availableSensors

Computer console•Control Software and Data
Analysis Software•Windows 10 Operating System•Monitor, keyboard, mouse•Benchtop FFT-M HFRR
•Up to 20 N force (more optionsavailable)•Enclosure•Displacement 10 µm - 2.8 mm•Resolution: 0.1 µm•Oscillation frequency: up to 200 Hz

Standards Conforms To•Piezo Friction Sensor•D6079•ASTMD7688•CEC F-06-A-96•ISO 12156-1•IP450•BS-EC590•Many MoreEnvironmental•Up to -35 °C, 180 °C, 400 °C•Humidity controller 5 to 95% RH*Standard reference oils (high andlow viscosity) and disk provided forcalibration.

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

HFRR-FFT-M-2023-A-02A-EN

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

Agent / distributor