The 1209 series pneumatic cone clutch offers 10 times the heat dissapation as the 1309 series cone clutches with up to 1600 BTU/hour at 1800 RPMs. 

• 1-, 1-1/8-, 1-1/4-, and 1-3/8-inch bore sizes (25.4, 28.6, 31.8 and 34.9 mm)
• High torque with no slippage
• Fast response based on low air consumption