Chicago-Latrobe
Chicago-Latrobe 43619 19/64 in 135 Degree Heavy-Duty Jobber Length Drill Bit
High-speed steel 19/64 in jobber drill bit with 135-degree split point and TiCN coating for heavy-duty drilling
- TypeDrill Bits
- MaterialHAWA
- 19/64 inch fractional size matches precise hole requirements
- 135-degree split point starts cleanly without wandering
- High-speed steel with TiCN coating resists wear in tough materials
- Jobber length provides standard reach for general drilling tasks
- Decimal equivalent 0.2969 inch aids exact size identification
Chicago-Latrobe 43619 Jobber Drill Bit
The Chicago-Latrobe 43619 is a jobber length drill bit designed for general-purpose drilling tasks. It suits professionals and DIY users needing a reliable fractional-size bit for metal or wood applications.
135 Degree Split Point with TiCN Coating
The 135 degree split point angle enables self-centering starts and reduces walking on hard surfaces. A TiCN coating increases surface hardness and wear resistance compared to uncoated high speed steel.
19/64 Inch Diameter Decides Fit
The 19/64 inch diameter (decimal equivalent .2969) determines whether this bit matches the required hole size. Buyers needing a different fractional diameter must select another model.
Highlights
- 19/64 inch fractional size matches precise hole requirements
- 135-degree split point starts cleanly without wandering
- High-speed steel with TiCN coating resists wear in tough materials
- Jobber length provides standard reach for general drilling tasks
- Decimal equivalent 0.2969 inch aids exact size identification
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How often will the TiCN coating on this 19/64 in drill bit need replacement under heavy use?
The TiCN coating is a surface treatment that wears gradually; it cannot be reapplied, so the bit is replaced once the coating no longer protects the high-speed steel substrate.
What limits continuous drilling with the 135 degree split point on this 43619 bit?
The 135 degree split point reduces walking and thrust force, but the practical limit is chip evacuation in deep holes since the jobber length has no coolant holes.
How much heat does the high-speed steel body generate when running all day in steel?
High-speed steel retains hardness at elevated temperatures, and the TiCN coating lowers friction, but sustained heavy feed rates will still raise tip temperature enough to require periodic cooling pauses.
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