Specification Brand : Boston Gear BulletPoint1 : Transmits torque between parallel shafts to provide rotational power to another part of a motorized system BulletPoint2 : Pressure angle of 14.5 degrees for a higher contact ratio between gears, resulting in quieter operation than larger pressure angles BulletPoint3 : Diametral pitch of 12 for applications requiring a balance between transferring torque and controlling changes in speed and direction of rotation with precision BulletPoint4 : Cast iron for compressive strength and resistance to wear Color : One Color ExternallyAssignedProductIdentifier : 9345664742660 ExternallyAssignedProductIdentifier1 : 781711103043 ExternallyAssignedProductIdentifier2 : 0781711103043 ItemName : Boston Gear ND144 Spur Gear, 14.5 Pressure Angle, Cast Iron, Inch, 12 Pitch, 0.875" Bore, 12.167" OD, 0.750" Face Width, 144 Teeth ItemPackageDimensions_Height : 12.192 centimeters ItemPackageDimensions_Length : 31.496 centimeters ItemPackageDimensions_Width : 32.004 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : spur-gears Manufacturer : Boston Gear Material : Cast Iron ModelNumber : NL22B NumberOfItems : 1 NumberOfTeeth : 144 PartNumber : ND144 ProductDescription : 1. The tooth surface has been treated with high temperature, high hardness, consistent pitch size, smooth operation. 2. CNC machining, seamless matching synchronous belt. 3. Transmission buffer is more stable, lightweight and assured, with cushioning and damping ability, low noise. Model: 04C Sprocket Wheel Tooth Pitch: 6.35mm Bore: 6/8/10/12/15mm Surface treatment: Blackening Material: 45 Steel ProductSiteLaunchDate : 2011-03-10T08:00:01.000Z Size : 8mm Style : Classic UnitCount : 1