Technical Information and Test Results for Fenner Precision StretchBands

ATM and Self-Service

ContentsTypical Physical Properties, General Manufacturing Range, and Tolerances

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Available Materials 5Testing Capabilities 6Coefficient of Friction and Electrical Conductivity 7Fenner Precision StretchBand Tension during Accelerated Life Testing

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Tension Decay Comparison 9Long Term Tension Decay Comparison 10Comparison of Tension at Different Temperatures 11Installed Tension Properties at Various Temperatures 12Comparison of Tension at Different Humidities 13Summary of Results 14

25 years’ experience in the ATM and paper propulsion industries.

UL Approved.

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Typical Physical Properties, General Manufacturing Range, and Tolerances

Belt sizes from 10mm to 300mm wide, and 75mm to 1500mm long.

General thickness tolerance of ± 0.15mm on press moulded belts, and ± 0.1mm on ground/linished belts.

Installed load of nominal 1N/mm2 of belt cross section.

Width tolerance normally ± 0.5mm.

Available with impression or ground finish.

Available on a Dual Durometer construction.

Available with tracking ribs or perforations.

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All of our CSM rubber and EPDM materials are anti-static.

Material EPDM CSM RubberEP24 EP35 EP10 H6

Hardness (Shore A) 65 70 75 65 ±5

Tensile Strength (Mpa) 8 10 10 14 (min.)

10% Modulus (Mpa) 0.7 1.0 1.1 0.5 - 1.0

Tear Strength (N/mm) 15 10 15 5 (min.)

Specific Gravity (g/cm3) 1.12 1.18 1.16 1.22 ±0.02

Elongation at Break (%) 300 200 220 300 (min.)

Electrical Conductivity (Ω)

106 - 108 106 - 108 106 - 108 106 - 108

RoHS Compliant ✓ ✓ ✓ ✓

UL94 HB Approved (1mm minimum thickness)

✓ ✓ ✓ X

Available Materials

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Testing Capabilities

Fenner Precision owns a well-equipped testing laboratory that can simulate the environment of an ATM. Our on-site laboratory includes facilities for:

Rheology testingHardness testingTensile testing

We are also able to simulate an extended belt life cycle with our environmentally controlled dynamic testing chamber. This chamber has a temperature range of -400C to +700C.

The pulley setup from our long term StretchBand testing equipment. It simulates the convoluted path a belt may take in a cash machine. An eccentric pulley replicates a stack of notes passing through.

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Coefficient of Friction and Electrical Conductivity

Results of testing a Fenner Precision StretchBand and a competitor’s belt.

Belt Typical Belt Face Coefficient of FrictionFenner Precision 0.65mm Seamless Elastic EPDM Belt

Impression 1.07

Plain 1.07Competitor 0.65mm Seamless Elastic PU Belt

Manufactured (Gloss) 0.48Ground (Matte) 1.02

Belt Typical Belt Face Electrical Conductivity (MΩ)Fenner Precision 0.65mm Seamless Elastic EPDM Belt

Impression 0.28

Plain 0.29Through 0.27

Competitor 0.65mm Seamless Elastic PU Belt

Manufactured (Gloss) 0.48

Ground (Matte) 726

Through 1000

Electrical Conductivity

Coefficient of Friction

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Fenner Precision StretchBand Tension during Accelerated Life Testing

Installed Tension v. Running Time (as years)

Testing of Fenner Precision’s 1.0mm seamless elastic EPDM StretchBands.

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Tension Decay ComparisonA comparison between Fenner Precision’s seamless elastic EPDM StretchBands and competitors’ seamless elastic PU belts.

Tension Decay after 12 hours at 230C, 50%RH, No Motion

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Long Term Tension Decay Comparison

Tension Decay after 3 months (-400C to +500C)

A comparison between Fenner Precision’s seamless elastic EPDM StretchBands and a competitors’ seamless elastic PU belts.

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Comparison of Tension at Different Temperatures

Installed Tension v. Temperature (-100C to +200C)

As the temperature varies so does the

tension on the competitor’s belt,

whereas the Fenner Precision StretchBand

tension remains relatively constant.

Excessive tension variation can lead to slipping and tracking

issues.

A comparison between Fenner Precision’s 1.0mm seamless elastic EPDM StretchBands and a competitor’s 1.0mm seamless elastic PU belts.

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Installed Tension Properties at Various Temperatures

Installed Tension v. Temperature (-400C to +400C)

The Fenner Precision 0.65mm StretchBand remains stable over

a wider range of temperatures than

the competitor’s 0.65mm belt.

A comparison between Fenner Precision’s 0.65mm seamless elastic EPDM StretchBands and a competitor’s 0.65mm seamless elastic PU belts.

Belt tracked off pulley

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Comparison of Tension at Different Humidities

Installed Tension v. Relative Humidity (50% to 100%)

As the humidity varies so does the tension on the competitor’s belt, whereas the Fenner

Precision StretchBand tension remains

relatively constant.Excessive tension

variation can lead to slipping and tracking

issues.

A comparison between Fenner Precision’s 1.0mm seamless elastic EPDM StretchBands and a competitor’s 1.0mm seamless elastic PU belts.

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Improved tension characteristics across a wide range of temperatures and humidities when compared to competitors’ polyurethane belts.

Fenner Precision EPDM StretchBands operate between -200C and +500C. At -100C the flexibility of the competitor’s belts was poor.

Enhanced tracking capabilities compared to competitors’ polyurethane belts.

Fenner Precision StretchBands don’t require tensioners; enabling simpler, more cost-effective design systems.

Property Fenner Precision 0.65mm Seamless Elastic EPDM StretchBands

Competitor 0.65mm Seamless Elastic Reinforced PU Belts

Installed Tension Decay = =Working Temperature Range + -Coefficient of Friction + -Electrical Conductivity + -

Key: + Superior to competitor; - Inferior to competitor; = Comparable to competitor

Summary of Results

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Each Fenner Precision StretchBand is thoroughly checked by our dedicated quality assurance team.

For more information, contact:

Fenner Precisioninfo@fennerprecision.comTel: +44 (0)1522 551010Fax: +44 (0)1522 511252

www.fennerprecision.com

ISO 9001 2008Made in England