Warranty Period: 3 Years
Support Customization: Oem, Odm
Species: Twist Drill Bit
Application: Metal Drilling
Surface Treatment: Other
Productivity: 100000 Set Per Month
Transportation: Ocean,Land,Air,Express
Supply Ability: 100000 Set Per Month
Payment Type: L/C
Standard Twist Drill Angle Twist the basic Angle that twist drills includes vertex Angle, horizontal edge bevel Angle, before horn and hind horn 4 parts. 1. The apex Angle The Angle between two cutting edges of twist drill is called vertex Angle. Angle is generally 118°, drilling soft materials can be smaller, drilling hard materials can be larger. 2. Bevel of the edge The Angle between the horizontal edge and the main cutting edge is called the apex Angle and is usually 55*. The bevel Angle of the edge varies with the Angle after grinding. After the Angle is large, the bevel Angle of the cutting edge becomes longer, and the circumferential force increases when drilling. If the rear Angle is small, the reverse is true. 3. The anterior horn Generally -30*~30*, the largest at the outer edge, near the center of the bit into a negative rake Angle. Twist drill helix Angle is bigger, front Angle is bigger also. 4, after Angle The twist drill's back Angle also varies, with the smallest at the outer edge and the largest at the center of the Drill Bit. The value ranges from 8* to 12*.
Cobalt steel bits last longer, cut faster than high speed steel
29 fractional sizes: 1/16 in. to 1/2 in. by 64ths
26 letter sizes: A-Z
60 numbered wire gauges:1 to 60
Metal storage case
Retains hardness at temperatures up to 1000°
Model NO. GMDB001
Product Categories : Drill Bit > Twist Drill Bit
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