Vesco Plastics Australia Pty Ltd Phone : +61 (03) 9796 4098
3 Carl Court, Hallam, Victoria 3803
Fax: +61 (03) 9796 4180
robert@vesco.com.au

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Specifications

Vesconite Guide - Vesconite Specifications Sheet - Vesconite Chemical Resistance Sheet
Vesconite Hilube Specification Sheet - Vesconite Hilube Chemical Resistance Sheet

Vesconite Guide

LOAD (k /sq cm) x SPEED (metres/min) LIMITS (P.V LIMITS)

Temperature Limits

  • Do not use Vesconite over 100c
  • Do not use Vesconite in steam or boiling water
  • Over 80c load limits reduce by half

Machining Information

Turning

  • Clamp carefully to avoid cracking and distortion due to excessive pressure
  • Allow the part to coom before final precision turning
  • Use cutting speeds of about 400 metres/minute
  • Rate of feed 0.1 to 0.2mm per revolution
  • Use an end relief and rake angle of 5o
Sawing

  • Use tooth pitch 2 to 3 mm
  • Use speed 250 metres/minute
Drilling

  • Use pilot holes when drilling holes over 20mm diameter
  • Use cutting speeds of 15 metres/minute
  • Avoid excessive pressures, overheating or clogging of hole with cuttings
  • Thermal Expansion Clearance Loss

    When a bush is confined in a housing the clearance will decrease with a rise in temperature. Loss of clearance (CL) is given by:

    A simplified method of calculation being :

    Where E = coefficient of expansion, and T = Temperature change above ambient, based on 10mm wall thickness

    Material Coefficient of thermal expansion as follows:
    Vesconite5 x 10-5 mm/mm/oC (0.00005)
    Standard Nylon9 x 10-5 mm/mm/oC (0.00009)
    Vescolene PP18 x 10-5 mm/mm/oC (0.00018)
    Vescolene PE20 x 10-5 mm/mm/oC (0.00020)
    Vescolene Ultra20 x 10-5 mm/mm/oC (0.00020)

    Average PV Limits for Vesconite

    LOAD (kg/sq cm) X SPEED (metres/min) limits. (P.V limits)

    Average PV limits for Vesconite

    Unlubricated50Lubricated Continuously400
    Lubricated initially100Under Water operation2000


    Example Assume Total Load on Bush - 200kg
    Assume Shaft - 100rpm

    Average PV Limits for Vesconite

    PROJECTED BEARING AREA: ABCD

    IS 2.5cm x 1.5cm = 3.75cm

    SPEED = RPM x CIRCUMFERENCE (METRES)
    = 100 x 0.015 (METRES) x 3.14 (PYE)
    = 4.7 METRES/MIN P.V = LOAD x SPEED = 53.3 x 4.7 = 250

    From the P.V Table Vesconite would be suitable provided there is continuous lubrication.

    Interference/Running Clearances

    • For press fit use an interference ranging from 0.05 for thick walled bushes, increasing to 0.2mm for thin walled bushes.
    • Note: If bore cannot be machined after bush is pressed into housing, add interference to running clearance when machining bore.
    • Allow a basic running clearance 0.05mm to which must be added 0.015mm for every mm single wall thickness.
    • High speeds and hot running clearances must be doubled.

    Vesconite - Specifications

    Physical properties may be altered to some extent by processing conditions.

    Density 1.38 g.ml
    Melting point 260 oC
    Hardness (Shore D) 84
    Tensile strength at yield (ASTM D-638) 65 MPa
    Tensile strength at break 62 MPa
    Elongation at break 26%
    Tangent modulus of elasticity (ASTM D-790) 3400 MPa
    Flexural yield strength 120 MPa
    Deflection temperature at 1.85MPa 93 C
    Modulus of elasticity under compression 2290 MPa
    Compression strength at yield 98 MPa
    Shear strength 49 MPa
    Notched impact strength charpy (ASTM D-256) 33 J.m
    Notched impact strength IZOD 16 J.m
    Heat conductivity 0.3 W.K.m
    Coefficient of linear thermal expansion 6x10-5 oC
    Maximum moisture absorption in water at 20C 0.5%
    Equilibrium moisture absorption in air (50% RH, 23C) 0.2%
    Dynamic unlubricated friction coefficient on steel 0.12-0.20
    Dielectric strength 14 kV.mm
    Gamma ray resistance 50% loss of properties 100 Mrads

    The above data should be taken for indicative purposes. Physical properties maybe altered to some extent by processing conditions.

    Vesconite - Chemical Resistance

    Vesconite is unaffected for 1 week at 20C by:

    30% Sulphuric Acid Ethanol, Methanol
    40% Nitric Acid Freon 11
    Concentrated Hydrochloric Acid Butane and Heptane
    1% Sodium Hydroxide Mineral oils
    10% Sodium Chloride Transformer oil
    20% Sodium Carbonate Brake fluid
    10% Sodium  Hypochlorite  Paraffin
    30% Hydrogen Peroxide High octane petrol

    Vesconite Hilube - Specifications

    Density 1.38 g.ml
    Melting point 260 C
    Hardness (Shore D) 82
    Tensile strength at yield (D638) 66 MPa
    Tensile strength at break 65 MPa
    Elongation at break 58%
    Tangent modulus of elasticity (D790) 3726 MPa
    Flexural yield strength 113 MPa
    Deflection temperature at 1.85 MPa 117 C
    Modulus of elasticity under compression  2206 MPa
    Compression strength at yield 99 MPa
    Shear strength 49.4 MPa
    Notched impact strength charpy (D256) 26 J.m
    Notched impact strength IZOD 30 J.m
    Heat conductivity 0.3 W.K.m
    Coefficient of linear thermal expansion 6x10-5  oC
    Maximum moisture absorption in water at 20 C 0.5%
    Equilibrium moisture absorption in air (50% RH, 23 C) 0.2%
    Dynamic unlubricated friction coefficient on steel.  0.10
    (test at 8 MPa, 0.8 m.min,PV=6.4 MPa.m.min)  
    Static friction coefficient on polished steel (no lubrication) 0.09
    Dielectric strength 14 kV.mm
    Gamma ray resistance 50% loss of properties 100 Mrads

    The above data should be taken for indicative purposes. Physical properties may be altered to some extent by processing conditions.

    Vesconite Hilube - Chemical Resistance

    30% Sulphuric Acid Ethanol, Methanol
    40% Nitric Acid Freon 11
    Concentrated Hydrochloric Acid Butane and Heptane
    1% Sodium Hydroxide Mineral oils
    10% Sodium Chloride Transformer oil
    20% Sodium Carbonate Brake fluid
    10% Sodium Hypochlorite Paraffin
    30% Hydrogen Peroxide High octane petrol

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