Centre drill (combined drill and countersink) with 60° straight conical form, double ended and cylindrical body, size BS6 with 1/4" drill diameter, a body diameter of 5/8" and an overall length of 3", according to BS 328 standard to produce form A centre holes, HSS and bright finish for machining free machining, plain carbon and alloy steel and grey cast-iron More information:  | | Coating name (Grade): | Bright | Surface treatement: | Original surface | Basic standard group (BSG): | BS 328 | Body material code (BMC): | HSS | Brand Name: | Dormer | Connection diameter - fractional inch (DCON MS): | 5/8 | Cutting diameter - fractional inch (DC): | 1/4 | Cutting diameter - inch (DC): | 0.25 inch | Hand (Cutting direction): | Right | Length chip flute - fractional inch (LCF): | 3/8 - 5/16 | Overall length - fractional inch (OAL): | 3" | Point Angle (SIG): | 120 ° | Step included angle (STA): | 60 ° | Usable length diameter ratio? (ULDR): | 1 XD | Ordering code ISO: | A225BS6 |
|