What is wheel gauge in railway?
The rail wheel profile gauge is a hand held instrument which measures the thickness of the wheel itself to ensure it is still within advised safety standards. Measuring wheel profile can be done by hand however, a wheel profile gauge is often more accurate and easy to use and highly efficient.
How thick is a train wheel?
The International Union of Railways has defined a standard wheel diameter of 920 mm (36 in), although smaller sizes are used in some rapid transit railway systems and on ro-ro carriages.
What is wheel profile?
The “wheel profile” refers to the thickness of the wheel, so, wheel profile measurement is the measurement of the thickness of the wheel. Over time the wear and tear on railway wheels can affect the quality of them and have an impact on the interaction between the wheels and the rails.
What is worn wheel profile?
Worn wheel profile is a special profile on wheel tyre derived out of standard wheel profile suitable to worn shape of rail head of which are of 80% track. This is to minimise the condemnation period to avoid frequent wheel changing, re profiling and enhance the life of the wheel.
What is J rim?
Inner width of wheel in inches (6 ½ x 25.4mm= 152.4mm). J. Indicates the shape of the wheel on the place where the tyre bead sits on the wheel. x. Indicates that the construction of the wheel is one-piece.
What is JJ tyre?
JJ refers to the contour of the bead seat on the wheel, essentially its shape ( “J” indicates the shape of the letter J).
What is the wheel gauge of LHB wheel?
Our Products
| Item | Weight Per piece (tonnes) | Wheel tread dia (mm) |
|---|---|---|
| EMU | 0.423 | 955 |
| Kolkata Metro | 0.342 | 780 |
| Narrow Gauge | 0.144 | 513 |
| LHB | 0.326 | 918 |
How much shelling on a wheel can be allowed?
Length of shelling mark has reached 40mm. Depth of Hollow tyre has reached to 3mm. It has been decided by Board (MRS) that Cast wheels will not be fitted on LHB stock, since non AC LHB trains are also planned to » run at speeds in excess of 110 kmph.
Why are train wheels angled?
These conical wheels can allow the train to slide sideways slightly to make up for the difference in distances between the two tracks. Thus, trains stay axled, with the wheels on both sides of the train rotating at the same speed, and are still able to go around curves.
Why are train wheels slanted?
To help the wheels stay on the track their shape is usually slightly conical. This means that the inside of the wheel has a larger circumference than the outside of the wheel. (They also have a flange, or raised edge, on the inner side to prevent the train from falling off the tracks.)