Description

• 5 Piece HSS Centre Drill Set
• Bright Finish HSS Centre Drill 118 / 60 Set
• Centre Drills are used with a lathe to centre drill stock for mounting in the lathe.
• They are designed to drill a small diameter pilot hole followed by a 60 countersink which provides a bearing surface for the 60 point of the lathe centre.
• Centre drills are also used extensively with milling machines to accurately start holes.
• The hole locations can be dialled in using the milling machine’s calibrated hand wheels.
• The hole is then started using the centre drill.
• The large diameter shank on the centre drill holds the drill point right on centre.
• Once the hole is started, the centre drill is replaced with a drill of the desired diameter and the finished hole is then drilled.