ISHIHASHI SEIKO 精密軸承鑽頭 20.0 x 1/2（JD 型號 13）JMA20.0X12 JMA20.0X12

Feature

• With Triangle Slip Prevention Shank: Triangle firmly stops on the three-claw chuck, and non-slip (idling prevention) is perfect.
• Sharpness/Quickness No. 1.
• Sharp Cutting Blade: With ISF's unique thinning, it has excellent centripetal properties without requiring a punch, more than twice the speed of normal work, and outstanding sharpness and durability.
• Strong Helix Groove and Stiffness: The high helix with a twist angle of 40° is extremely strong and can be cut lightly even with stainless steel.
• 1/2 large axis type.

Specifications

• Shaft diameter (mm): 13.0
• Diameter (mm): 20.0
• Total length (mm): 140
• Groove Length (mm): 85