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ROSS Flexing Tester
Materials Testing Instrument

ROSS
Flex Testers

QM650R ROSS Flexing Tester

The QM650R ROSS flexing tester measures crack/cut-propagation resistance of footwear and polyurethane materials under repeated bending. Perforated standard specimens are cyclically bent at 100±5 cpm, and the number of bends until the cut propagates to 6 mm is recorded to quantitatively rate the material's bend-crack resistance.

100±5 cpm Flexing Rate
Up to 90° Bend Angle
Multi-Expansion Grips
Noise & Vibration Control
Optional -45~120°C Environmental Chamber
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✓ Free Installation & Commissioning ✓ 1-Year Full-Machine Warranty ✓ Exported to 90+ Countries Worldwide
100±5cpmFlexing Rate
Max 90°Bend Angle
ASTM D1052Applicable Standard
Certifications
CE UL ISO 9001 RoHS FCC
QM650R ROSS Flexing Tester

Key Product Features

ROSS-method repeated flexing of footwear/polyurethane; cut-propagation count

ROSS Method

Standard ROSS footwear flexing

Wide-Range Flexing

5±0.5 Hz (1.5 Hz at low temperature)

Expansion Grips

multi-expansion specimen grips

Vibration Damping

Noise & vibration control

Chamber Option

-45~120°C environmental chamber

ROSS Footwear Flexing
Cut/Crack-Propagation Test

The QM650R ROSS tester repeatedly bends footwear materials and standard polyurethane specimens, driving them through a reciprocating fold at up to 90° while observing slow cut propagation. The flexing rate is 100±5 cpm (about 5±0.5 Hz), with multi-expansion grips and noise/vibration control; an optional -45~120°C chamber evaluates low-temperature flexing.

From athletic soles to polyurethane shoe materials - footwear repeatedly folds during walking, and cuts slowly propagate into cracks. The ROSS method is the classic footwear flex-crack-propagation test, simulating real-wear folding; the low-temperature chamber evaluates winter cold resistance.

Built for footwear flex evaluation - 90° ROSS folding plus an optional low-temperature chamber, compliant with ASTM D1052.

  • ▪ROSS method · 90° fold + cut propagation
  • ▪ASTM D1052 · footwear standard
  • ▪100 cpm flexing rate · standard
  • ▪Optional -45~120°C chamber · low-temperature flexing
  • ▪Multi-expansion grips · fit specimens

Core Parameters

ROSS Flexing Tester
Bend AngleMax. 90°
Flexing Rate100 ± 5 cpm
Environmental Chamber-45~120°C (option)
Overall Dimensions600(W)×500(D)×600(H) mm
Product TypeROSS Flexing Tester

Product Highlights

  • 100±5 cpm Flexing Rate
  • Up to 90° Bend Angle
  • Multi-Expansion Grips
  • Noise & Vibration Control
  • Optional -45~120°C Environmental Chamber
  • 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

Sole MaterialsUpper MaterialsPolyurethane (PU)Footwear ComponentsElastomers
S

Applicable Standards

ASTM D1052
ASTM D638
ISO 527
GB/T 1040
ASTM D412
ASTM D882
ISO 37

Technical Specifications

QM650R Detailed Technical Specifications

ParameterQM650R
Product TypeROSS Flexing Tester
Bend AngleMax. 90°
Flexing Rate100 ± 5 cpm (5±0.5 Hz; 1.5±0.5 Hz at low temperature)
Gripsmulti-expansion specimen grips
Running CharacteristicsNoise & vibration control system
Environmental Chamber-45~120°C (option)
Applicable StandardsASTM D1052
Overall Dimensions600(W) × 500(D) × 600(H) mm
Power SupplyAC 220V 50/60Hz
Operating Environment10-35°C, ≤80%RH
Safety ProtectionOverload Protection / Emergency Stop

Glossary

ROSS Method
Repeated flexing and cut-propagation test for footwear materials
cpm
Reciprocating bends per minute
Cut Propagation
A pre-cut slowly lengthens with the number of bends
Multi-Expansion Grips
Expandable grips that fit footwear materials of different thickness
Environmental Chamber Option
-45~120°C evaluates low-temperature flex embrittlement

Max 90°

Large Bend Angle

100±5cpm

Stable Rate

6 mm Criterion

Cut-Propagation Count

Chamber Option

Low-Temp Flexing

Vibration Damping

Low Noise

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 QM650R ROSS flexing 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

Repeated flexing crack-propagation evaluation of footwear and polyurethane - authoritative research support for ROSS 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 QM650R

What does the QM650R mainly test? +

Measures the crack/cut-propagation resistance offootwear and polyurethane materials under repeated bending.

What is the bend angle and rate of the QM650R? +

Bend angle Max.90°, flexing rate 100±5cpm (1.5±0.5 Hz under low-temperature conditions).

How are results judged? +

The number of bends until the cut extends to 6mm is recorded as the bend-crack-resistance index.

How do the grips fit different footwear materials? +

Uses multi-expansion specimen grips that fit sole/upper materials of different thickness.

Which test standards are supported? +

Compliant with ASTM D1052 footwear ROSS flex test standards.

Can it do low-temperature flexing? +

An optional -45~120°C environmental chamber evaluates the material's flex embrittlement at low temperature.

What is the lead time for standard models? +

Standard-model lead time is 3-8 weeks; options such as the environmental chamber 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

90° Repeated Bending,Quantifying Footwear Cut Propagation

The QM650R ROSS flexing tester runs at 100±5 cpm with a 90° bend angle, recording the bends until the cut reaches 6 mm to evaluate crack resistance of footwear and polyurethane.

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