SNAP-BACK® WING PULLEYS Solve Tough Maintenance Problems Economically
	Utilizing the same basic frame as the Turn Clean™ the patented VAN GORP® SNAP-BACK® Pulley eliminates virtually every maintenance problem on conveyor systems handling wet, sticky or abrasive materials. Its exclusive design allows the pulley to automatically clean itself by reducing build-up, belt wear and eventually maintenance and downtime problems. Here’s how it works:
High tensile strength rubber or Urethane lagging, encased in a steel jacket, displaces upon belt contact. When belt contact is broken, the rubber actually “snaps back” to its original height. Ideal in snub and bend applications where the pulley comes into contact with the belt’s carrying side.
This unique feature assures minimum belt wear and maximum cleaning efficiency for years of maintenance-free service. Lagging can be easily and economically changed in the field by merely installing a new channeled rubber insert within the heavy-duty, 7-gauge steel jacket channel.

Physical properties of Rubber and Urethane Lagging
RUBBER COMPOUND SM-1191		POLYURETHANE COMPOUND 7560
SM-1191 rubber is the workhorse among synthetics, accounting for a large percentage of all man-made rubbers. Most economical and performs ideally on the vast majority of conveyor pulleys. MAJOR ADVANTAGES Outstanding resilience properties of SM-1191 rubber produces a unique self-cleaning action during on-and-off contact with a conveyor belt. Good abrasion resistance, wear and tensile properties. Resilience about the same as natural rubber. Abrasion resistance is one of the remarkable properties of most rubbers. The SM rubber compounded for VAN GORP is designed for abrasion resistance and extended service throughout a wide range of temperatures. Historical choice for most applications. Physical properties of Compound SM 1191 (ASTM Standards) Durometer Hardness............................65 Tensile Strength (psi)........................3000 Elongation (min pct)............................500 Heat Age (hrs at 158° F).......................70 Compression Set (22 hrs at 158° F)..............................50% Temperature Service Range (degrees F)...............minus 40 to plus 212 Load at 20% Maximum Deformation (psi)...............................50%		Polyurethane is a remarkable elastomer with unusually high physical properties. MAJOR ADVANTAGES High abrasion and oil resistance, tear strength and tensile strength. Good elongation, excellent shock absorption with a wide range of flexibility and elasticity. Good solvent resistance and resistance to oxygen and ozone. Polyurethane has a most useful combination of hardness with elasticity, as demonstrated by mallets that will drive nails but not mar a desk surface. These same characteristics make Polyurethane most desirable as lagging material for wing pulleys subjected to highly abrasive materials. Physical properties of Compound 7560 (ASTM Standards) Durometer Hardness............................85 Tensile Strength (psi)........................6000 Elongation (min pct)............................850 Weather Resistance................................Excellent Compression Set (22 hrs at 158° F)..............................15% Temperature Service Range (degrees F)...............minus 90 to plus 212
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