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"A-Block" Woven Brake Lining Material
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Gemini Woven Oilfield Non-Asbestos Material
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Green Gripper Woven (GGW) Non-Asbestos Material
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Gemini Woven Non-Asbestos Material
Description N/A The woven "A-Block" material is a premium non-asbestos brake lining developed especially for oil field use on draw-works, well servicing and drilling rigs. Extensive field evaluations confirm that this product provides outstanding performance in this demanding application area. It exhibits smooth, long lasting trouble-free service with excellent burnishing or bedding-in properties with reduced abrasion for increased rim life. This premium performance material is available in the form of custom sized slabs or rolls. N/A Gemini woven oilfield 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 Woven Oilfield can be used on wet/ dry band brakes for industrial use where medium to high friction is required. N/A GGW is a non-asbestos woven product for heavy-duty industrial applications. Notable on the test curve are the consistent friction levels and the excellent fade resistance. Recovery is immediate and complete. GGW exhibits high friction under a wide range of temperatures. GGW 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. N/A 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.
Specific Gravity (SAE J380) N/A 1.23 N/A 1.02 N/A 1.31 N/A 1.12
Gogan Hardness (SAE J379A) N/A
Minimum Tensile Strength (ASTM D638) N/A 2500 psi N/A 1500 psi N/A 15000 psi N/A 1500 psi
Minimum Compression Strength N/A
Normal Coefficient of Friction (SAE J661) N/A 0.50 N/A 0.54 N/A 0.55 N/A 0.51
Hot Coefficient of Friction (SAE J661) N/A 0.41 N/A 0.44 N/A 0.44 N/A 0.44
Maximum Wear Rate (SAE J661) N/A 0.006 in³/hp-hr N/A 0.005 in³/hp-hr N/A 0.005 in³/hp-hr N/A 0.005 in³/hp-hr
Friction Code N/A GF
Maximum Operating Rubbing Speed Limits N/A 5000 ft/min
Maximum Operating Pressure Limits N/A 200 psi
Drum Temperature for Constant Operation N/A 550 ºF N/A 500 ºF N/A 550 ºF N/A 550 ºF
Characteristics N/A
  • Excellent burnishing property
  • Uniform friction
  • Non-abrasive
  • Premium life characteristics
  • High tensile strength
 		N/A
  • High Static friction
  • Uniform friction
  • Non-ferrous metallic
  • Immediate and complete recovery
  • Good wear rate
 		N/A
  • High Static friction
  • Uniform friction
  • Non-ferrous metallic
  • Immediate and complete recovery
  • Good wear rate
 		N/A
  • High Static friction
  • Uniform friction
  • Non-ferrous metallic
  • Immediate and complete recovery
  • Good wear rate
Note N/A 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.