TOP OF RAIL FRICTION MODIFIER PRODUCTS
TOR-H2OX (Hybrid) is ideal for railways looking for the benefits of both water-based and traditional synthetic-based friction modifiers. This hybrid top of rail friction modifier provides exceptional fuel savings, reduces noise, and extends wheel and rail life. TOR-H2OX (Hybrid) is a non-cavitating material that has a 4-6 mile (6-10km) carry down distance that maintains traction and breaking performance, that allows the grease dispensing units to be spaced approximately 8 miles (13km) apart in bi-directional traffic, requiring fewer trackside units. This friction modifier can also be used with any trackside top of rail friction management equipment.
Water Base Benefits:
Increased Carry Down:
Find out more about TracShield, the patented trackside friction management system for top of rail friction modifiers, delivering enhanced performance and accuracy.
Download our Rail Friction Management Solutions Brochure
Our range of Rail friction management solutions includes Ecolabel accredited curved rail grease, top of rail friction modifiers, gauge face greases, lubricants for infrastructure and application equipment.
Explore our full range of high-performance rail lubricants and trackside application equipment in our Rail Friction Management Solutions brochure.
GAUGE FACE GREASES AND TOP OF RAIL FRICTION MODIFIERS:
WHY IT IS ESSENTIAL GAUGE FACE LUBRICANTS DO NOT MIGRATE TO THE RAIL CROWN
Gauge face lubricants are used to reduce wear by lowering friction at the active interface between the wheel flange and gauge face of curved rails. Top of Rail (ToR) friction modifiers are used to control friction between the wheel tread and rail crown (or rail head), to reduce curving forces and associated wear, damage and noise. However, if gauge face lubricant migrates to the top of rail and contaminates the running band on the rail crown, this will result in a lowered coefficient of friction and could prevent the safe braking of vehicles.
HOW DOES A GAUGE FACE LUBRICANT WORK?
As well as reducing wear at the gauge face, gauge corner and wheel flange, gauge face greases also help prevent damage due to Rolling Contact Fatigue, reduce the flanging noise that occurs when a train passes through a curve and, perhaps most importantly, reduce the risk of derailment. The result is greatly improved rail and wheel life, and major cost savings for Train Operators and Infrastructure Managers.
A curved rail grease is therefore designed to deliver low friction levels, typically with a coefficient of friction less than 0.1, over as great a length of track as possible (known as carry-down). This type of lubricant must also be able to perform in a wide range of operating temperatures and challenging weather conditions.
WHAT DOES AN EFFECTIVE TOR FRICTION MODIFIER DO?
An effective ToR Friction Modifier will maintain the coefficient of friction between the rail crown and wheel tread at an optimum level that reduces friction compared to a dry rail, and also reduces steering forces and rail wear. By doing so the friction modifier can also significantly reduce the “wheel squeal” commonly heard in tight curves, as well as certain types of rail damage such as Low Rail Corrugation. A further benefit can be reduced energy consumption and improved fuel economy.
AVOIDING CROSS CONTAMINATION
The benefits of using gauge face greases and ToR friction modifiers are similar, with both providing wear protection, noise mitigation and extending rail and wheel life. There are, however, distinct differences in the intended coefficient of friction for each.
Gauge face greases are designed to lower the coefficient of friction and should be aiming to achieve a level of no more than 0.15, and typically 0.1 or less. ToR friction modifiers are required to control the coefficient of friction and should maintain a coefficient of friction of around 0.30 – 0.35, but ideally no lower than 0.25.
If a gauge face grease migrates to, and contaminates the rail crown or ToR friction modifier, this can reduce the coefficient of friction to a point where a vehicle’s ability to brake safely may be compromised. The use of high quality and correctly installed application equipment is therefore vital for the safe and effective use of gauge face lubricants.
FIND OUT MORE
If you would like to know more about lubricant and friction modifier compatibility, and associated application equipment, or have any specific queries then email our technical engineers and our technical engineers will discuss your lubrication requirements with you.
DID YOU KNOW?
USING TOR H20X YOU CAN APPLY UP TO 50% LESS THAN CONVENTIONAL FRICTION MODIFIERS
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GaugeShield® from Loram is an intelligent trackside gauge face lubrication system that senses the passing of train wheels over the systems durable sensors and automatically dispenses a controlled quantity of grease to the gauge face of the rail. The GaugeShield® gauge face application system creates a smooth interaction between the gauge face of the rail and the wheel flange to improve steering and to reduce noise.