Drawing No. | Type of Clip | Approx. Weight of Clip (kg) | Toe Load Range (kg) | Toe Load Deflection (mm) | Remarks | |
---|---|---|---|---|---|---|
RDSO/T-1892 | ERC Round Toe | 1.0 | 645-800 | 11.4 | ||
RDSO/T-3700 | ERC Flat Toe | 1.0 | 645-800 | 11.4 | ||
RDSO/T-3701 | ERC MK-III Flat Toe | 0.910 | 850-1100 | 13.5 | ||
RDSO/T-3721 | ERC MK-II Flat Toe | 0.60 | 700-900 | 11.2 | ||
RDSO/T-5919 | ERC MK-V | 1.080 | 1200-1500 | 13.5 | ||
RDSO/T-8258 | ERC J-Clip | 1.000 | 650 | 8.5 | ||
RDSO/T-6254 | Anti-Theft ERC | 0.937 | 850-1100 | 13.5 |
One of the critical parameter determining the in-service performance of ERC is its’ Toe Load and therefore, toe load
measurement at the prescribed frequency is a part of maintenance regime of these fittings.
The mechanical toe load measuring device consists of a pre-calibrated helical spring having a steel pointer attached
to a lever arrangement through a link hanger for gripping elastic rail clip. When the spring is compressed by turning a
rotating handle at the top of the device, the toe of the clip gets pulled up and compression of the spring causes a
pointer to indicate displacement on a graduated scale. The Toe load (in Kg) exerted by the spring on the toe of the
clip is measured by multiplying the displacement of the pointer and the spring constant. The device is supported on
three legs, two resting on the sleeper and one on the rail head.
The Electronic toe load measuring device has a load cell of 2000 kg capacity and an LCD panel integrated with suitable
electronic circuitry. This device has got a lever arrangement attached to it in order to grip the toe of an elastic
rail clip. When the load cell is compressed by turning a rotating handle, the elastic rail clip gets pulled up.
The force applied on load cell is converted into load (in kg.) and displayed directly on LCD.