Precision Pulley and Idler-Lagging

Precision Pulley and Idler

Lagging

LAGGING FOR CONVEYOR PULLEYS
Precision® has complete in-house pulley lagging capabilities. Every step of the pulley manufacturing and lagging process is controlled internally which assures quality, prompt delivery, and competitive pricing of lagged pulleys. Available in a wide variety of styles and thickness, lagging is primarily used to improve traction capacity, resist abrasive conditions and extend pulley and belt life. The style of lagging is required is usually influenced by operating conditions.

HERRINGBONE GROOVE LAGGING (HBG)
The style of lagging is required is usually influenced by operating conditions. Herringbone is shown to the immediate left. This Tractor style grooving is where the points do not meet in the middle. This is normally used in drive pulleys, with the V pointing in the direction of rotation. (3/8" minimum thickness)

CHEVRON GROOVE LAGGING
Some prefer having the points meet, as done in Chevron, over HBG style shown above. This is also used primarily on drive pulleys. (3/8" minimum thickness)

DIAMOND GROOVE LAGGING
Diamond , or double HBG, or double chevron is primarily used for reversing conveyor drive pulleys. It is also often used for spare pulleys, when one doesn't know what the direction of rotation. (3/8" minimum thickness)

Cross Sectional View

ALIGNER GROOVE LAGGING
This is a "Lorig" (Lorig is a trademark of US Steel) style lagging. It is used on flat face pulleys, the lagging is machined flat, then grooves are machine in at an angle. This results in a training action. As the rubber is compressed by the belt, the lagging will deflect towards the center, helping to track the belt. As you can see in the cross sectional view. (3/4" normal thickness, )

CIRCUMFERENTIAL GROOVE LAGGING
This is used on non-drive pulleys for really wet applications, OR for cold temperatures, which allows the lagging to deflect, and keep material from building up on the lagging. (3/8" minimum thickness)

CERAMIC LAGGING
Ceramic lagging is rubber with ceramic tiles embedded into it. This makes for excellent traction, and abrasion resistance. This is used on larger drives.

CRAFT-LAG® REPLACEABLE LAGGING
Craft-Lag is bonded to rigid backing which is then formed to a specific diameter. Craft-Lag can be used with or without retainers and is ideal for mining, crushed stone, sand and gravel, cement, agriculture, food processing, coal mining, power plants, feed and grain, and general industry.

XHD FAS-LAG™ REPLACEABLE LAGGING ( upper right)
This easy to install wing pulley lagging system is designed for the Quarry Max Wing pulley. It is welded to the flat contact bar to provide additional traction, protection for the contact bar and protection for the mechanical splice. The lagging is 2" wide by 1" thick to provide extra life. The standard is black 60 durometer SBR.
FAS-LAG2™ REPLACEABLE LAGGING (middle)
This easy to install wing pulley lagging system is used for original equipment. The welded flat contact bar provides additional strength. And is designed to provide additional traction, protection for the contact bar and protection for the mechanical splice. The standard is black 60 durometer SBR.
FAS-LAG® REPLACEABLE LAGGING (lower left)
This easy to install wing pulley lagging system is used primarily for retrofit applications. It provides additional traction, protection for the contact bar and protection for the mechanical splice. While the standard is black 60 durometer SBR, it can be provided with other compounds and colors.

TUFF TOP LAGGING
Tuff Top is used for small diameter drive pulleys, where the wear is not a problem. It is created by lagging the pulley, but before the rubber is cured, a special mold is applied to the lagging to cause the grooves to be formed in the lagging, and it is cured with this form in place. It gives excellent traction, without cutting grooves. This makes it available on thin lagging, such as 1/4."

ROUGH TOP LAGGING
Rough Top is used for small diameter drive pulleys, where the wear is not a problem. It is created by lagging the pulley, but before the rubber is cured, a special mold is applied to the lagging to cause the grooves to be formed in the lagging, and it is cured with this form in place. It gives excellent traction, without cutting grooves. This makes it available on thin lagging, such as 1/4."

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	LAGGING FOR CONVEYOR PULLEYS Precision® has complete in-house pulley lagging capabilities. Every step of the pulley manufacturing and lagging process is controlled internally which assures quality, prompt delivery, and competitive pricing of lagged pulleys. Available in a wide variety of styles and thickness, lagging is primarily used to improve traction capacity, resist abrasive conditions and extend pulley and belt life. The style of lagging is required is usually influenced by operating conditions.
	HERRINGBONE GROOVE LAGGING (HBG) The style of lagging is required is usually influenced by operating conditions. Herringbone is shown to the immediate left. This Tractor style grooving is where the points do not meet in the middle. This is normally used in drive pulleys, with the V pointing in the direction of rotation. (3/8" minimum thickness)
	CHEVRON GROOVE LAGGING Some prefer having the points meet, as done in Chevron, over HBG style shown above. This is also used primarily on drive pulleys. (3/8" minimum thickness)
	DIAMOND GROOVE LAGGING Diamond , or double HBG, or double chevron is primarily used for reversing conveyor drive pulleys. It is also often used for spare pulleys, when one doesn't know what the direction of rotation. (3/8" minimum thickness)
Cross Sectional View	ALIGNER GROOVE LAGGING This is a "Lorig" (Lorig is a trademark of US Steel) style lagging. It is used on flat face pulleys, the lagging is machined flat, then grooves are machine in at an angle. This results in a training action. As the rubber is compressed by the belt, the lagging will deflect towards the center, helping to track the belt. As you can see in the cross sectional view. (3/4" normal thickness, )
	CIRCUMFERENTIAL GROOVE LAGGING This is used on non-drive pulleys for really wet applications, OR for cold temperatures, which allows the lagging to deflect, and keep material from building up on the lagging. (3/8" minimum thickness)
	CERAMIC LAGGING Ceramic lagging is rubber with ceramic tiles embedded into it. This makes for excellent traction, and abrasion resistance. This is used on larger drives.
	CRAFT-LAG® REPLACEABLE LAGGING Craft-Lag is bonded to rigid backing which is then formed to a specific diameter. Craft-Lag can be used with or without retainers and is ideal for mining, crushed stone, sand and gravel, cement, agriculture, food processing, coal mining, power plants, feed and grain, and general industry.
	XHD FAS-LAG™ REPLACEABLE LAGGING ( upper right) This easy to install wing pulley lagging system is designed for the Quarry Max Wing pulley. It is welded to the flat contact bar to provide additional traction, protection for the contact bar and protection for the mechanical splice. The lagging is 2" wide by 1" thick to provide extra life. The standard is black 60 durometer SBR. FAS-LAG2™ REPLACEABLE LAGGING (middle) This easy to install wing pulley lagging system is used for original equipment. The welded flat contact bar provides additional strength. And is designed to provide additional traction, protection for the contact bar and protection for the mechanical splice. The standard is black 60 durometer SBR. FAS-LAG® REPLACEABLE LAGGING (lower left) This easy to install wing pulley lagging system is used primarily for retrofit applications. It provides additional traction, protection for the contact bar and protection for the mechanical splice. While the standard is black 60 durometer SBR, it can be provided with other compounds and colors.
	TUFF TOP LAGGING Tuff Top is used for small diameter drive pulleys, where the wear is not a problem. It is created by lagging the pulley, but before the rubber is cured, a special mold is applied to the lagging to cause the grooves to be formed in the lagging, and it is cured with this form in place. It gives excellent traction, without cutting grooves. This makes it available on thin lagging, such as 1/4."
	ROUGH TOP LAGGING Rough Top is used for small diameter drive pulleys, where the wear is not a problem. It is created by lagging the pulley, but before the rubber is cured, a special mold is applied to the lagging to cause the grooves to be formed in the lagging, and it is cured with this form in place. It gives excellent traction, without cutting grooves. This makes it available on thin lagging, such as 1/4."