Traction Rolling Stock - Indian Railways Institute of Electrical ...
Traction Rolling Stock - Indian Railways Institute of Electrical ...
Traction Rolling Stock - Indian Railways Institute of Electrical ...
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4. WHEELS<br />
4.0 INTRODUCTION<br />
Some locos are provided with renewable steel tyres and have tyres as per specification<br />
IRS-R15-64-oil quenched with tensile strength <strong>of</strong> 100-110 kg/mm². Other locos are provided with<br />
solid wheel disc conforming to specifications IRS M2-65 and IS 1030-1962.<br />
After assembly wheels are inspected for diameter and pr<strong>of</strong>ile.<br />
4.1 DIAMETER<br />
The diameter <strong>of</strong> new wheel disc <strong>of</strong> WAG5, WAM4, WAP type locomotives is<br />
1090mm. The condemning diameter is 1016mm. In a locomotive following maximum<br />
variations are permitted in diameter <strong>of</strong> two wheels:<br />
New In service<br />
a) On the same axle 0.5 mm 1.5 mm<br />
b) On two axles <strong>of</strong> same bogie 2.0 mm 5.0 mm<br />
c) On two axles <strong>of</strong> different bogies <strong>of</strong> same loco 15.0 mm 20.0 mm<br />
New<br />
In service<br />
4.2: PROFILE (Ref. Fig 4.2)<br />
Variation in pr<strong>of</strong>ile <strong>of</strong> the wheel takes place due to root wear and flange wear. Both<br />
these wear is checked with condemning gauge. The permissible maximum clearance from the<br />
gauge is<br />
Root wear (checked at position Y)<br />
6 mm<br />
Flange wear (checked at position X)<br />
3 mm
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