Item # 4281, Gemini Woven Non-Asbestos Material On The Rowland Company

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	Item # 4281, Gemini Woven Non-Asbestos Material

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Gemini woven is a non-asbestos woven product for heavy-duty industrial applications. It exhibits nearly constant friction level up to 500 ºF. It also shows full recovery by 400 ºF. Gemini can be used on wet/ dry band brakes for industrial use where medium to high friction is required. The product is available in roll form, flat sheet, and custom shapes.

Unit of Measure: Imperial Metric Both

Mechanical Properties · Frictional Properties · Characteristics · Note

Mechanical Properties

Specific Gravity (SAE J380)		1.12

Minimum Tensile Strength (ASTM D638)		1500 psi

Frictional Properties

Normal Coefficient of Friction (SAE J661)		0.51

Hot Coefficient of Friction (SAE J661)		0.44

Maximum Wear Rate (SAE J661)		0.005 in³/hp-hr

Friction Code		GF

Maximum Operating Rubbing Speed Limits		5000 ft/min

Maximum Operating Pressure Limits		200 psi

Drum Temperature for Constant Operation		550 ºF

Characteristics

High Static friction
Uniform friction
Non-ferrous metallic
Immediate and complete recovery
Good wear rate

Note

For Normal and Hot Coefficient of Friction (SAE J661):
Friction values shown are for guide purposes only since values deviate with changes in temperature, pressure and speed. Practical design should include a 25 to 50 percent safety factor.

For Maximum Operating Rubbing Speed and Pressure Limits:
Rubbing speed, drum temperature, and pressure are directly related. Changing any one value will change the others. The values shown represent typical conditions, but are not the ultimate limits of the material.

For Drum Temperature for Constant Operation:
Rubbing speed, drum temperature, and pressure are directly related. Changing any one value will change the others. The values shown represent typical conditions, but are not the ultimate limits of the material.

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	· Torque Curves for Gemini Woven Non-Asbestos Material

Item # 4281, Gemini Woven Non-Asbestos Material

Specific Gravity (SAE J380)

Minimum Tensile Strength (ASTM D638)

Normal Coefficient of Friction (SAE J661)

Hot Coefficient of Friction (SAE J661)

Maximum Wear Rate (SAE J661)

Friction Code

Maximum Operating Rubbing Speed Limits

Maximum Operating Pressure Limits

Drum Temperature for Constant Operation