Precision Twist Drill R89CO Type D Heavy Duty Jobber Length Drill, NO 52, 1-7/8 in L, 135 deg, HSS-Co, Bronze Oxide

• Cobalt base material with bronze oxide for wear resistance and lubricity
• Gold oxide, retains cutting fluid and helps prevent chip to tool welding
• 135 deg split point angles are self-centering, reduce walking, good for hard material and reduce pressure on cutting edges
• Jobber length drill bits are the most common length drill bit, suitable for a wide range of applications
• Cobalt is harder than high speed steel and provides better wear resistance
• It is commonly used on high tensile alloys
• Spiral flutes are constructed of a higher flute angle to remove chips easier
• No coolant channel

Precision Twist Drill Jobber Length Drill| Type D Heavy Duty| Series: R89CO| NO 52| 1-7/8 in Overall Length| 3XD Cutting Depth| 2 Flutes| Spiral Flute| 7/16 in Flute Length| 0.0635 in Shank| Straight Shank| 135 deg Point| Self-Centering Split Point| Right Hand Cutting| HSS-E Cutting Edge| HSS-Co| Bronze Oxide| Applicable Materials: Hardened| Tempered Alloy Steel| Nodular Graphite Malleable Cast Iron| Titanium and Alloyed Nickel