8..2mm Twist Drill High Speed Steel Bit HSS-4241 for Steel, Aluminum Alloy 1pcs

Description:

Material : High Speed Steel 4241

Type : N Type 118 degree

Bit Diameter : 8.2mm/0.32"

Cutting Edge Length : 78mm/3.07"

Total Length : 117mm/4.61"

Weight: 31g

Main color: Silver

HRC: 62-63

Package Content: 1pcs x Twist Drill Bit.

How to Use Twist Drill Bits

• Ensure the left and right cutting edges of the drill are symmetrical when drilling.
• Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit.