TopGroove™ Catalogue Numbering System TopGroove Boring Bar Identification System A25RNNTOR2 A 25 R N N T O R 2 Bar Bar Bar Insert Insert Insert Rake Hand Insert Type Diameter Length Holding Shape Location Angle of Tool Size Method Steel with N— End mount W1 coolant TopGroove A E Right hand R Side mount Bar diameter S Left hand L Dia. insert size W1 1 3,54mm 2 3,81mm 3 5,35mm Metric Bars 4 6,40mm M 150mm 5 9,65mm Q 180mm 6 9,73mm R 200mm 8 11,13mm S 250mm T 300mm U 350mm widia.com E77