xaoyunyn High Speed Steel Center Drill Countersink Bit Set for Stable Machining of Metals,Alloys Wood

6pcs Combined Center Drill Countersink Bit Lathe Mill Tackle Tool Set Kit
Features:
and Resistance: Center drill bit is made of high-speed steel, with an extremely blade, low consumption and with resistance, wear resistance.
60° countersink angle suit all standard centers.
Wide Usages: Center drill bits can be used to make conical holes for lathe center in order to make starting point for standard drill, designed to the drill from walking, as well as for producing center holes in components or
Workpieces with requiring machining between centers.
Available for all Kinds of Materials: Metal, Alloy, Copper, Iron, Wood, Aluminum, and so.
Specification:
Each drill has double end and is ground with standard 60 degree angle
The set includes 1 each of the following sizes:
# 1 with 4mm body diameter & 1mm drill tip diameter
# with 4mm body diameter & 1.5mm drill tip diameter
# 3 with 5mm body diameter & 2mm drill tip diameter
# 4 with 6mm body diameter &.5mm drill tip diameter
# 5 with 8mm body diameter & 3mm drill tip diameter
# 6 with 12mm body diameter & 5mm drill tip diameter
Instructions:
Choose match type of center drill bits according to the hole type and the straight hole size of the machined parts.
The heat hardness of center drill bit is between 63-66HRC appropriate.
Wash the rust-proof grease before using the center drill bit, so as to avoid chip sticking the cutting.
The of work-piece should be to avoid center drill bit being damaged.
The center drill bit should achieve the required position accuracy before drilling.
Package Included:
1 set of 6pcs Center Dril