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MODEL FR-7225

RTM FRICTION TESTERROTATIONAL TRACTION MEASURING SYSTEMUESHIMA SEISAKUSHO CO., LTD.

Features■ Friction tests at Dry, Wet, and Ice conditions canbe performed with one set of equipment.
■ Traction (Acceleration, Braking) test changing
slip ratio during 1 test can be performed.
■ Friction force (Rolling Resistance) Measurement
at free rolling conditions can be performed.
■ Max. 30deg. slip angle can be applied between
the sample and the test road. (Automaticsetting)
RTM FRICTION TESTER（MODEL FR-7225）

Outline
The RTM Friction Tester enables the evaluation offriction characteristics of tire tread compound on amaterial testing basis, and can be tested in Dry,Wet, and Ice conditions on the ring-shaped roadsurface. The test is performed by pressing thespecimen on a constantly rotating ring-shaped
wheel at free rolling conditions, or with a slip ratio
applied in the 0 to +/- 95% range and measuring
the friction force. Also, max. 30deg. slip angle canbe applied to the specimen against its tangentialline.

■ Specimen taken from actual tire tread can beglued on the sample for testing.
■ Chamber and water temperature can becontrolled individually.
■ Ice road surface can be made in the testchamber.

Test Conditions■ Road condition (Dry, Wet, Ice)
■ Slip ratio (the road speed as the reference)■ Load■ Speed■ Temperature (chamber and water)

Software Functions

Applications■ Test condition setup and test start command■ Traction (Acceleration, Braking）Measurement■ Rolling Resistance Measurement■ Cornering Force Measurement■ Making a µ-S curve by data acquisition■ Making a Torque-Time curve by a free-rolling test■ Making a Fy-Time curve by a free-rolling test
■ Making a µ-Time curve in a constant slip ratio test

Temperature Sensor

Road Ring for Dry/WetSample

Sample Unit

Cleaning Brush

Brushing Unit

Road Ring for Ice
Machining Cutter

Ice Road Preparation

Software

μ-S test setup screen

μ-S Curve (Same Compound)Free rolling setup screen

Pre-test screenµ-S Curve (Different Compounds)
Smoothing screenSpecifications
FR-7225

ＭＯＤＥＬName
SampleRoad
Road surface
Road speed
Sample speed
Torque detection
Slip angle
Slip ratio
Load detection
Lateral force detectionLoading section
Test chamber temp.
Road temp.
Water temp.
Surface temp.
Refrigeration
Compressed air
Power supply
Water
Service Condition
Dimensions, Weight

RTM Friction Tester
Columnar shape Dia.80mm, W16mm
Sheet shape
W10mm x L300mm x T2mm（to glue actual tread onto testsample）
Thickness: 30mm, Width: 50mm, dia. of the road center: 700mm (outer dia.:750mm)
Safety walk, Ice
4 - 400r/min (Approx. 0.5 - 50km/h)
35 - 3500r/min (Approx. 0.5 - 50km/h)
25Nm capacity torque meter (Dry/Wet), 2Nm (Ice), measurement error: ±1%FSTo be replaced to each of the rotating parts, depending on road conditions±30deg. against road surface tangential line (automatic setting)
0 - ±95% automatic setting (25km/h max. for negative slip ratio)
Load cell capacity 200N, measurement accuracy: ±1%FS
100N capacity load cell (Dry/Wet), 50N(Ice), Accuracy±1%FS
To be replaced to each of the rotating parts, depending on road conditions
Feedback control with air servo with the load range of 20 - 150N (50N or more±1%FS)-10°C - +60±2°C
No temperature control (Surface temperature is monitored.)
5°C - 40°C (around the valve) for Wet
Measured with non-contact surface temperature sensors (sample and road)with defrosting device (Temperature changes when defrosting)
0.5MPa - 0.8MPa dry clean air, to be connected with φ8 one-touch connector
3 Phs. 200V 50A 50Hz/60Hz terminal connection
Tap water (20A): 5L/min (for Wet/Ice),
Chiller water for refrigerator (20A)：30L/min(25°C or below)
Road drain (25A), Chiller water drain (20A)(1) Temp: 5 – 40°C
(2) Humidity: 35 - 80%RHDimensions 1400（W）×1800（D）×1760（H）mm, Weight Approx. 1,400kg

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UESHIMA SEISAKUSHO CO.,LTD.
＜Manufacturer＞

U E S H I M A S E I S A K U S H O C O . , LT D .
6-5-22 Yaho, Kunitachi-shi, Tokyo 186-0011, Japan
TEL.81-42-572-1397 FAX.81-42-573-1520

https://www.ueshima-seisakusho.co.jp* Please be noted that the contents in this brochure may change without prior notice due to the improvement of the equipment.

027-468262-13