Chicago-Latrobe
Chicago-Latrobe 43620 135 Degree Heavy-Duty Jobber Length Drill Bit
A 5/16 inch jobber-length drill bit with a 135-degree split point made from high-speed steel with TiCN coating
- TypeDrill Bits
- MaterialHAWA
- 135-degree split point starts holes cleanly without walking
- 5/16 inch high-speed steel body resists heat during heavy use
- TiCN coating extends cutting life in tough materials
- Jobber length design reaches standard drilling depths easily
- Decimal equivalent .3125 matches precise fractional specifications
Chicago-Latrobe 43620 5/16 in Drill Bit
This Chicago-Latrobe 43620 jobber-length drill bit has a 5/16 in diameter and a 135 degree split point. It is made from high-speed steel with a TiCN coating for wear resistance. The fractional-inch sizing suits general-purpose drilling in metal and plastic. The 0.3125 decimal equivalent matches standard tooling requirements.
Metalworkers needing a 135 degree split point
This bit suits machinists and fabricators who require a self-centering point for accurate hole starts in ferrous and non-ferrous materials. The TiCN coating extends life in repetitive production drilling. Builders who need coolant-through capability or a different point angle should look at alternative designs.
135 degree split point geometry
The 135 degree split point reduces thrust force and prevents walking on hard surfaces. This geometry is the critical specification that determines whether the bit matches the application. Verify the point angle against your process requirements before ordering.
Highlights
- 135-degree split point starts holes cleanly without walking
- 5/16 inch high-speed steel body resists heat during heavy use
- TiCN coating extends cutting life in tough materials
- Jobber length design reaches standard drilling depths easily
- Decimal equivalent .3125 matches precise fractional specifications
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What does the 135-degree point angle mean when I start drilling?
The 135-degree split point reduces walking and starts the cut quickly on hard materials, so the bit centres itself without a centre punch.
How does the TiCN coating affect cutting performance and tool life?
TiCN increases surface hardness and heat resistance, allowing higher cutting speeds and longer edge life in steel and stainless compared with uncoated high-speed steel.
Will the 5/16-inch shank fit my standard drill chuck?
Yes, the jobber-length bit has a straight 5/16-inch shank that fits any three-jaw chuck rated for that capacity or larger.
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