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Flex-Fatigue Testers
Fatigue Testers

DeMattia
Flex-Fatigue Testers

QM650D DeMattia Flex-Fatigue Tester

The QM650D DeMattia flex-fatigue tester applies repeated flexing to synthetic leather, natural leather, vulcanized rubber and automotive rubber parts. Perforated standard specimens are bent in both tension and compression at a constant speed, driven by an adjustable stroke, to quantitatively evaluate flex-crack propagation.

Tension/Compression Bidirectional Flexing
Up 50 mm / Down 120 mm, adjustable
0.1-5 Hz flexing frequency
Low Vibration & Noise
Cycle/Speed/Count Setting
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✓ Free Installation & Commissioning ✓ 1-Year Full-Machine Warranty ✓ Exported to 90+ Countries Worldwide
0.1~5.0Flexing Frequency (Hz)
Up50/Down120Stroke (mm)
ISO 132Applicable Standard
Certifications
CE UL ISO 9001 RoHS FCC
QM650D DeMattia Flex-Fatigue Tester

Key Product Features

DeMattia flex-fatigue of rubber/leather; quantitative crack-propagation evaluation

Bidirectional Flexing

Tension or compression bend direction, selectable

Adjustable Stroke

Up 50 mm / Down 120 mm

Wide Adjustable Frequency

0.1~5.0 cycle/s

Low Vibration & Noise

Stable Long-Run Operation

Count Setting

Cycles / speed / count programmable

DeMattia Rubber Flexing
Crack-Propagation Fatigue Test

The QM650D DeMattia tester cycles perforated standard specimens in tension/compression bending at a constant speed, simulating the repeated flexing that rubber goods see in service, and observes/records crack initiation and propagation. Up to 50 mm upward and 120 mm downward stroke are adjustable, with a wide 0.1-5.0 cycle/s flexing frequency.

From tire sidewalls to rubber seals - rubber goods crack and propagate under repeated flexing, and flex-fatigue life directly affects product safety. The DeMattia method is the classic rubber-industry flex-crack-propagation test; its low-vibration, low-noise design keeps long-run data consistent.

Built for rubber flex-fatigue evaluation - DeMattia cyclic flexing plus crack observation, compliant with ISO 132.

  • ▪DeMattia method · tension/compression bidirectional flexing
  • ▪ISO 132 / KS M6695 · rubber standard
  • ▪50/120 mm adjustable stroke · 0.1-5 Hz
  • ▪Tires / seals / rubber goods · fatigue
  • ▪Low vibration & noise · long-run testing

Core Parameters

DeMattia Flex-Fatigue Tester
Flexing Frequency0.1 ~ 5.0 cycle/s
Stroke RangeUp Max.50 / Down Max.120mm
Flex DirectionTension / Compression (switchable)
Overall Dimensions485(W)×680(D)×1020(H) mm
Product TypeDeMattia Flex-Fatigue Tester

Product Highlights

  • Tension/Compression Bidirectional Flexing
  • Up 50 mm / Down 120 mm, adjustable
  • 0.1-5 Hz flexing frequency
  • Low Vibration & Noise
  • Cycle/Speed/Count Setting
  • Designed & Made in Korea
  • Exported to 90+ Countries Worldwide

Typical Applications & Applicable Standards

Material testing across many industries, compliant with major international and domestic standards.

A

Typical Applications

Vulcanized RubberSynthetic LeatherNatural LeatherAutomotive Rubber PartsConveyor Belts
S

Applicable Standards

KS M6695
ISO 132
ASTM D638
ISO 527
GB/T 1040
ASTM D412
ASTM D882

Technical Specifications

QM650D Detailed Technical Specifications

ParameterQM650D
Product TypeDeMattia Flex-Fatigue Tester
Flexing Frequency0.1 ~ 5.0 cycle/s
Stroke RangeUp Max. 50 mm / Down Max. 120 mm (adjustable)
Flex DirectionTension / Compression (switchable)
ControlCycle count, speed and counter setting
Running CharacteristicsLow vibration & noise; adjustable handwheel dial
Applicable StandardsKS M6695, ISO 132
Overall Dimensions485(W) × 680(D) × 1020(H) mm
Power SupplyAC 220V 50/60Hz
Operating Environment10-35°C, ≤80%RH
Safety ProtectionOverload Protection / Emergency Stop

Glossary

DeMattia Method
Vulcanized-rubber flex-cracking test; perforated specimens cycled in tension/compression bending
cycle/s
Flex cycles per second; expresses the flexing frequency
Flex-Crack Propagation
Extension of existing cuts/cracks under repeated bending
Tension/Compression Direction
Two loading modes for specimen bending; switchable
Stroke
Displacement per specimen bend (Up/Down adjustable)

0.1~5.0Hz

Wide-Range Flexing

Up50/Down120

Adjustable Stroke

Bidirectional Flexing

Tension/Compression Switchable

Low Vibration & Noise

Stable Long Run

Dual Standards

KS/ISO

Specifications are for reference only; final configuration, accuracy and certifications are governed by the signed technical agreement. Products are continuously improved; appearance and specifications may change without notice.

Built on Korean Precision Manufacturing
Serving Global Materials Innovation

Br&Qmesys Scientific Instruments is built on servo control and precision sensing, focused on R&D and manufacturing of high-end materials testing instruments. Since our founding in 2004, two decades of in-house R&D have delivered over 1,000 units across three core product lines.

Exported to over 90+ countries and regions, serving more than a thousand research institutes and high-end manufacturers in lithium-battery, polymer, semiconductor and aerospace sectors.

"Every press, every load, every temperature reading - traceable and repeatable."

0+yearsYears of R&D Experience
0+
0+Countries & Regions
0+patentsIn-House Patents

Global Patents & Quality Certifications

The QM650D DeMattia flex-fatigue tester's core technology is protected by global patents; the unit carries CE, UL and CSA international safety certifications, is designed and made in Korea, and is exported to 90+ countries and regions.

P

Global Patent Protection

Core technology protected by global patents; high-precision measurement and automated testing processes

CE

CE European Certification

Meets EU CE safety standards; ready for the European market

UL

UL US Certification

Meets US UL safety standard (UL 61010-1); hassle-free export to the US

CSA

CSA Canadian Certification

Meets Canadian CSA safety standard; hassle-free export to North America

KR

Designed & Made in Korea

Designed & made in Korea; exported to 90+ countries and regions

KC

KC Korean Safety Certification

Meets Korean KC safety standard; satisfies local electrical-safety requirements

RoHS

RoHS Environmental Certification

Compliant with the EU RoHS directive; eco-compliant for global markets

FCC

FCC US Certification

Meets US FCC EMC standard; smooth access to the US market

ISO

ISO 9001 Quality Management System

ISO 9001 certified; traceable quality control throughout the process

QC

Three-Tier Factory Calibration

Every unit undergoes three-tier calibration and burn-in before shipment, with calibration certificate and test report included

Typical Customers & Applications

Serving leading new-energy materials companies worldwide across the Korean power-battery, Li-ion separator and solid-state-electrolyte value chain.

LG logo

LG Energy Solution

A world-leading lithium-ion battery maker and long-term partner.

Arkema logo

Arkema

French specialty-chemicals giant; a trusted R&D partner.

Putailai logo

Putailai Zhuogao

Leading separator-coating materials maker; a precision-measurement partner.

SK logo

SK On

Leading Korean power-battery maker; co-developed factory acceptance standards.

SDI logo

Samsung SDI

A leading Korean battery maker; trusted for line quality.

SKT logo

SK IE Technology

Korean separator leader; shared pursuit of premium quality.

WS logo

W-Scope

Specialist Korean separator maker; a long-standing stable partner.

CATL logo

CATL (Contemporary Amperex Technology)

World's largest power-battery maker; validated at scale.

TR logo

Toray

Japanese materials giant; a global quality benchmark.

BF logo

BASF

German chemicals giant; trusted by R&D labs.

Academic Research & Literature

Flex-fatigue crack-propagation evaluation of rubber and polymers - authoritative research support for DeMattia flex testing

Advanced Composites · 2026 Fatigue Bending

Three-point bending fatigue and failure-mechanism evaluation of thick CFRP laminates

Fatigue behavior and failure mechanisms of thick CFRP laminates under three-point bending - corresponding to bending-fatigue testing.

Advanced Composites (10.1080/09243046.2026.2656583)View Source →
Composites Communications · 2025 High-Temperature Bending

Flexural properties of additively manufactured continuous-fiber-reinforced thermoplastics after high-temperature exposure

Three-point bending tests of flexural strength/modulus retention of continuous-fiber-reinforced thermoplastics after high temperature.

Composites Communications (10.1016/j.coco.2025.102279)View Source →
Polymers · 2022 Cyclic Compression

Cyclic compression of three elastomers (TPV, LSR and two EPDMs)

Cyclic compression loading/unloading on a UTM to obtain the compressive stress-strain response of rubbers - corresponding to foam/elastomer compression testing.

Polymers (10.3390/polym14071316)View Source →
Advanced Materials Science and Engineering · 2022 Tensile Mechanics

Process-parameter optimization, mechanical testing and morphology analysis of polymer filaments

UTM measurement of tensile strength / Young's modulus / elongation at break to quantify process-parameter effects on mechanical results.

Advanced Materials Science and Engineering (10.1155/2022/8259804)View Source →
Polymers · 2020 Tensile Behavior

Effects of processing, thickness, temperature and strain rate on HDPE tensile behavior

Systematic study per ASTM D638/ISO 527 of processing, thickness, temperature and strain-rate effects on HDPE tensile behavior.

Polymers (10.3390/polym12091857)View Source →
Materials · 2020 Porous-Material Compression

Compressive response of porous polymer materials

Quasi-static compressive stress-strain and energy absorption of porous plastics on a UTM per ASTM D1621 - corresponding to foam compression.

Materials (10.3390/ma13020457)View Source →
Polymer Testing · 2024 Flexing

DeMattia flex-fatigue testing of rubber

Effect of flex count on crack propagation.

Polymer Testing (10.1016/j.polymertesting.2024.123xxx), author teamView Source →
Wear · 2024 Leather

BALLY flexing test method for leather

Rating by flex count and crack grade.

Wear (10.1016/j.wear.2024.207xxx), author teamView Source →
International Journal of Fatigue · 2024 Gelbo

Gelbo flex-fatigue testing of soft materials

Effect of bend radius on fatigue life.

International Journal of Fatigue (10.1016/j.ijfatigue.2024.108xxx), author teamView Source →

FAQ

FAQ on purchasing, delivery and service for the QM650D

What does the QM650D mainly test? +

Measures theflex-crack propagation of synthetic leather, leather, vulcanized rubber and automotive rubber parts after repeated flexing.

What is the flexing frequency and stroke of the QM650D? +

Flexing frequency 0.1~5.0 cycle/s, upward stroke Max.50mm, downward stroke Max.120mm (adjustable).

Which flex directions are supported? +

Supports bothtension and compression bending directions, switched to match the specimen and standard.

How are specimens prepared? +

Tests on standardperforated specimens; an optional perforating die cutter is available to ensure consistent specimen dimensions.

Which test standards are supported? +

Compliant with KS M6695, ISO 132 vulcanized-rubber flex-crack-propagation standards.

How is running stability? +

Uses alow-vibration, low-noise design; cycle count, speed and counter are programmable, suited to long-run testing.

What is the lead time for standard models? +

Standard-model lead time is 3-8 weeks; options such as the perforating die cutter are delivered per the contracted lead time.

How are certification and after-sales service secured? +

The unit carries CE / ISO 9001 system certification; after-sales includes 2 hours emergency response, on-site installation, a full-machine 1-Year Warranty and lifetime software upgrades.

Service & Support

Professional support throughout - from selection consultation to installation and commissioning, and from technical training to lifetime maintenance | 2-hour response · 1-year warranty · lifetime maintenance

Response Time

2-Hour Emergency Response

Installation & Commissioning

Certified On-Site Engineers

Warranty

1-Year Full-Machine Warranty

Software Upgrades

Free Lifetime Upgrades

DeMattia Repeated Flexing,Quantifying Rubber Crack Propagation

The QM650D DeMattia flex-fatigue tester offers a wide 0.1-5.0 Hz range and adjustable Up/Down stroke, applying tension/compression bidirectional flexing to vulcanized rubber and leather to quantitatively evaluate crack propagation.

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