Specification Brand : HHIP BulletPoint1 : Cutter diameter is 2-1/2"; Arbor hole is 1" BulletPoint2 : For spur gears with 14.5 degrees & 20 degrees BulletPoint3 : Involute gear cutters make it possible to machine gears on your CNC or manual mill; The gear cutter is made into the involute profile which transfers it's shape to your gear blank allowing it to run with other gears; The gear cutter needs to be matched to your gear specifications including diametral pitch or module, pressure angle and the number of teeth it will cut BulletPoint4 : The profile of all involute spur gears changes slightly as the tooth count changes and so the profile of the gear cutter changes as well BulletPoint5 : Cutters are numbered from #1-#8 depending on how many teeth it will cut Color : sliver CutType : Center Cutting EndCutType : Flat End ExternallyAssignedProductIdentifier1 : 769053110424 ExternallyAssignedProductIdentifier2 : 0769053110424 FinishType : Finish IncludedComponents : Degree Gear Cutter ItemName : HHIP 2040-1674 16P #7 20 Degree Gear Cutter ItemPackageDimensions_Height : 9.1 centimeters ItemPackageDimensions_Length : 2.1 centimeters ItemPackageDimensions_Width : 7.5 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : involute-gear-cutters Manufacturer : HHIP Material : High Speed Steel ModelNumber : 2040-1674 NumberOfBoxes : 1 NumberOfCuttingEdges : 14 NumberOfFlutes : 14 NumberOfItems : 1 PackageLevel : unit PartNumber : 2040-1674 ProductDescription : Specification: Item Type: Straight Tooth Milling Cutter Material: High Speed Steel Specification: 63 x 12 Diameter: Approx. 63mm / 2.48in Tooth Width: Approx. 12mm / 0.47in Inner Diameter: Approx. 22mm / 0.87in Number of Teeth: 14