Vesconite Guide 
Vesconite Specifications Sheet 
Vesconite Chemical Resistance Sheet
Vesconite Hilube Specification Sheet 
Vesconite Hilube Chemical Resistance Sheet
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:
Vesconite  5 x 10^{5} mm/mm/^{o}C (0.00005) 
Standard Nylon  9 x 10^{5} mm/mm/^{o}C (0.00009) 
Vescolene PP  18 x 10^{5} mm/mm/^{o}C (0.00018) 
Vescolene PE  20 x 10^{5} mm/mm/^{o}C (0.00020) 
Vescolene Ultra  20 x 10^{5} mm/mm/^{o}C (0.00020) 
Average PV Limits for Vesconite
LOAD (kg/sq cm) X SPEED (metres/min) limits. (P.V limits)
Average PV limits for Vesconite
Unlubricated  50  Lubricated Continuously  400 
Lubricated initially  100  Under Water operation  2000 
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.
Physical properties may be altered to some extent by processing conditions.
Density 
1.38 g.ml^{} 
Melting point 
260 ^{o}C 
Hardness (Shore D) 
84 
Tensile strength at yield (ASTM D638) 
65 MPa 
Tensile strength at break 
62 MPa 
Elongation at break 
26% 
Tangent modulus of elasticity (ASTM D790) 
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 D256) 
33 J.m^{} 
Notched impact strength IZOD 
16 J.m^{} 
Heat conductivity 
0.3 W.K^{}.m^{} 
Coefficient of linear thermal expansion 
6x10^{5 o}C^{} 
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 
0.120.20 
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 is unaffected for 1 week at 20°C 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 
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 o}C^{} 
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.
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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