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Constant Speed Friction Tester for Clutch & Brake linings

Model: UT1054BC, JIS D4411, JIS D4311, SAE J661

Constant Speed Friction Tester is mainly used to determine the friction properties of slide rails and specific metals at approximate PV values. In addition, the machine can also be used to evaluate the friction and wear performance of lubricants, metals, plastics, coatings, rubber, ceramics and other materials under the condition of high linear speed. 


This Constant Speed Friction & wear testing machine is mainly used for testing the friction coefficient and wear rate of friction materials such as asbestos, powder metallurgy, and non-asbestos materials. 

Applicable standards:JIS D4411, JIS D4311, SAE J661. GB/T 5763-2008 Brake linings for automobiles; GB/T 5764-2011 Clutch facings for automobiles; GB/T 11834-2011 Asbestos friction pads for industrial machinery; QC/Y 227.1-2009 Test methods for friction performance of motorcycle and moped brake pads.

General Introduction

UT1054BC Constant Speed Friction Tester is mainly used to determine the friction properties of slide rails and specific metals at approximate PV values. In addition, the machine can also be used to evaluate the friction and wear performance of lubricants, metals, plastics, coatings, rubber, ceramics and other materials under the condition of high linear speed. 


This Constant Speed Friction & wear testing machine is mainly used for testing the friction coefficient and wear rate of friction materials such as asbestos, powder metallurgy, and non-asbestos materials. 

Applicable standards: JIS D4411, JIS D4311, SAE J661. GB/T 5763-2008 Brake linings for automobiles; GB/T 5764-2011 Clutch facings for automobiles; GB/T 11834-2011 Asbestos friction pads for industrial machinery; QC/Y 227.1-2009 Test methods for friction performance of motorcycle and moped brake pads.


Specifically used for comprehensive friction performance testing of automotive brake pads, clutch facings, motorcycle brake pads, construction machinery/petroleum rig brake blocks, and various asbestos-free/semi-metallic/ceramic friction materials, it serves as a core instrument for quality inspection of friction materials at the factory, raw material acceptance, new material formula development, third-party testing agencies, and university material laboratories.

The equipment relies on a fixed-speed disc-block friction structure to simulate the constant-speed friction conditions of friction pairs during vehicle braking and clutch engagement/disengagement. It accurately measures four key indicators: friction coefficient over different temperature ranges, high-temperature thermal fade performance, friction recovery during cooling, and volume/mass wear rates. The testing data can be directly used for national standard product inspections, issuance of factory certificates of conformity, and foreign trade inspections. It is an essential quality control device for domestic friction products manufacturers, following the classic national standard constant-speed test method, with a decades-long leading position in industry universality and recognition.
Constant Speed Friction Tester for Clutch

The machine consists of five major units: the main mechanical unit, mass lever loading mechanism, temperature-controlled heating-fan and water cooling system, high-precision signal acquisition module, and computer control software. With integrated electromechanical design, intelligent operation, and fully automated data acquisition, it avoids manual reading errors and provides excellent test repeatability.


Key Features

  • Features
  • Working principle (process)
  • Test Procedure
  • Standard
  • Applications

** Computer-controlled, automatically measures friction force and rotation speed, automatically calculates friction coefficient and wear rate;
** Test temperature is precisely controlled automatically by computer;
** English operating interface; Automatically draws curves and prints test results in both Chinese and English.

** Using the national standard classic lever weight loading structure, the load is precisely calibrated by the gravity of standard weights, avoiding the pressure drift problem of hydraulic/pneumatic loading. It has high loading accuracy and does not require calibration for long-term use. Equipped with a full set of standard weights, it can quickly switch between various test pressures to meet the national standard test load requirements for friction pads of different vehicle models.

** Intelligent full closed-loop temperature control, accurately simulating high and low temperature braking conditions

** The body is durable and easy to maintain, suitable for harsh workshop conditions

- The main machine frame is made of thickened cast iron in one piece, shockproof and vibration-resistant, and does not deform during long-term continuous 24-hour mass production tests;

- Friction chambers and water-cooled parts are fully nickel-plated to prevent rust, suitable for high-temperature steam and dusty workshop environments;


The basic structure and main parameters of this model are specified by JIS D4411, JIS D4311. An AC motor drives a vertical shaft through a V-belt, with a disc mounted on the upper end of the shaft, the upper surface of which serves as the friction surface. 


The specimen is clamped on the loading arm, and the lever applies a load downward through the vertical shaft, with the load amount determined by weights. The computer controls the entire test process.

Using the specified HT250 gray cast iron friction disc (Brinell hardness 180~220HB) as the driving disc, it rotates at a constant speed according to the standard; the brake pad/clutch sample to be tested (standard sample 25×25mm) is fixed at the end of the loading cantilever, and the standard normal pressure is applied using standard weights with lever amplification, with the sample end surface pressed against the rotating friction disc surface to form a friction pair.

1. The electric heating system performs stepwise heating of the friction disc (room temperature to 350°C), collecting friction force at each temperature point;

2. The high-precision force sensor captures friction resistance in real time, and the system automatically calculates friction coefficient = friction force / normal load;

3. After the high-temperature stage, start air cooling and water cooling, and retest the low-temperature friction recovery coefficient;

4. Measure the sample thickness/weight difference before and after the test, and the software automatically calculates the wear rate;

5. Automatically generate a full set of report data including **friction coefficient vs. temperature, friction force vs. time, and temperature rise curves.

JIS D4411: Brake linings for automobiles

JIS D4311: Clutch facings for automobiles

SAE J661: Brake Lining Quality Test Procedure

GB/T 5763-2008 Brake linings for automobiles; 

GB/T 5764-2011 Clutch facings for automobiles; 

GB/T 11834-2011 Asbestos friction pads for industrial machinery; 

QC/Y 227.1-2009 Test methods for friction performance of motorcycle and moped brake pads.

1. Manufacturing Enterprises (Main Purchasing Customers)

1) Automobile Brake Pad Factories: Incoming material inspection of raw materials (friction powder, fiber, resin) for passenger car/commercial vehicle disc/drum brake pads, ceramic brake pads, semi-metallic brake pads; in-process inspection of semi-finished products; full inspection of finished products before leaving the factory;

2) Clutch Disc Manufacturers: R&D and quality inspection of dry clutch discs, agricultural machinery/engineering machinery clutch friction discs;

3) Motorcycle Parts Enterprises: Production quality control of motorcycle brake pads, electric vehicle brake shoes, disc brake pads;

4) Heavy Industry/Petroleum Parts Factories: Performance verification of mining winch brake blocks, oil rig brake shoes, engineering machinery brake friction pads.


2. Third-Party Testing & Research Units

1) Quality Inspection Institutes, Third-Party Material Testing Laboratories: National standard testing of friction products commissioned by customers, issuing authoritative testing reports;

2) Universities, New Material Research Institutes: Comparative experiments for R&D of asbestos-free friction materials, new environmentally friendly friction formulas, research testing for projects.


3. Vehicle OEM Factories

Incoming inspection of OEM parts: random inspection of brake pads and clutch discs, controlling the quality of supplier products, avoiding the risk of brake failure after assembly.

Main Technical Specification

TemperatureTemperature control range 0~350℃, measurement accuracy 1℃, measurement error 5℃.
Friction ForceMeasurement range 0~2000N, measurement accuracy 1.0N, measurement error 10.0N.
Friction Disc Speed480~500 r/min, measurement accuracy 1 revolution, measurement error 1 revolution.
PowerMain unit 7.5 kW, heating tube 4.5 kW, fan 120 W,
total power: 12.12 kW.
Friction DiscMaterial is gray cast iron HT-250, Brinell hardness 185~215 HB, pearlitic structure.
SampleArea 25 mm × 25 mm, thickness 5~7 mm, 2 pieces.
Friction RadiusR=150mm Normal Pressure: 0.49 MPa, 0.98 MPa
Loading Weights1.25 kg × 1 piece, 2.5 kg × 3 pieces
DimensionsMain unit 1400 × 900 × 1200 mm
Control cabinet 500 × 300 × 800 mm
Weight1000 kg
Main Control Components

Computer DELL mainstream configuration

Printer: Color inkjet printer (to be purchased separately by the operator)

Sensor Components: Force sensor — range 0~200 kg, class 0.05, nonlinearity error 0.05% F.S.

Thermocouple — 0~400℃, type E
Proximity switch — E4-D5NK


Standard

SAE J661 Brake Lining Quality Test Procedure (Chase Test)

SAE J661 core purpose is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings under controlled, repeatable conditions. It formulates a unified laboratory test method to evaluate the safety performance, friction properties and wear behaviors of brake linings. The test results serve as core evidence for in-factory quality control of brake lining manufacturers and incoming quality inspection for buyers of brake linings. It is also commonly known as the Chase Test in the friction material industry.

Frequently Asked Questions

FAQ

Q1: Can this equipment only perform standard speed tests?  

A: The standard configuration executes the GB/T 5763/GB/T 5764 standard speed testing scheme. The software allows customization of heating programs, rotation speed, and load, enabling in-house non-standard tests as needed.  


Q2: Is sample cutting troublesome?  

A: You only need to cut 25×25mm small squares from finished friction pads. With a small cutting mold provided, samples can be quickly prepared without processing large parts.  


Q3: Does the equipment require professional lab personnel to operate?  

A: The software has a built-in one-key national standard test program. Ordinary quality inspectors can become proficient within one day, and data is automatically generated without manual calculation.  


Q4: Can it test asbestos-free, ceramic, and semi-metallic friction pads of all materials?  

A: It is fully compatible; all mainstream organic-based friction materials and powder metallurgy brake pads on the market can be tested normally. 


Q5: What's after-Sales Service?

1. The entire machine is guaranteed for 12 months, and the core motor, sensors, and temperature control module are guaranteed for 2 years;

2. Free on-site installation and commissioning, on-site operator training (software operation and national standard testing method instruction);

3. Lifetime remote technical support, free software upgrades, and continuous availability of spare parts.

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Beijing United Test Co., Ltd.