Wear-Bands, or bearings, have an incredibly important role in providing stability between the piston and the cylinder bore.
Wear bands are typically cut in 3 ways for ease of installation. Butt cut, angle cut (seen in picture), or step cut.
The cross sectional geometry of the wear band has impact on the stability, lubrication, pressure and cost of the wear bands.
Pneumatic wear bands, or bearings, provide critical stability to both piston and rod sealing systems. The primary role of wear bands is to prevent metal on metal contact between the two mating systems within the cylinder. However, additional functionality includes limiting friction.
The cross sectional geometry of the bearings is of critical importance and must be matched to the sealing application. New materials have increased friction limiting properties. A range of plastics, thermoplastics, various PTFE blends, and newly developed fabric reinforced materials can be customized by Gallagher engineers for your application.
Mouse over the above images to learn more about these products. Consult a Gallagher Engineer with specific application questions.