Chicago-Latrobe
Chicago-Latrobe 44969 135° Cobalt Jobber Drill Bit .4040
A 135-degree split-point cobalt jobber drill bit sized .4040 with TiAlN coating for reduced thrust and heat
- TypeDrill Bits
- MaterialHAWA
- 135° split point starts on contact without walking
- Cobalt steel with TiAlN coating resists heat and wear
- .4040 inch letter-size bit drills precise holes
- Jobber length gives standard reach for general use
- Non-coolant through design keeps setup simple
Chicago-Latrobe 44969 Cobalt Drill Bit
This Chicago-Latrobe 44969 drill bit is a jobber-length cutting tool made from cobalt steel with a TiAlN coating. It features a 135-degree split point designed for self-centering and reduced thrust during drilling operations. The bit measures .4040 inches in decimal equivalent, corresponding to letter size Y. It is a non-coolant-through accessory suited for general machine shop use.
Who This Suits And Who Should Look Elsewhere
Machinists drilling hard materials such as stainless steel or high-temperature alloys will benefit from the cobalt substrate and wear-resistant coating. The split point geometry helps prevent walking on curved surfaces. Builders needing coolant-through capability or a different point angle for specialised materials should look elsewhere. Buyers requiring a full set of incremental sizes must source additional bits separately.
Critical Specification .4040 Inch Diameter
The .4040 inch decimal diameter is the single specification that determines whether this bit fits the required hole size. This measurement corresponds directly to letter drill size Y and cannot be substituted for adjacent sizes. Verify the exact diameter against engineering drawings or tap charts before purchasing to ensure proper fit for threading or clearance applications.
Highlights
- 135° split point starts on contact without walking
- Cobalt steel with TiAlN coating resists heat and wear
- .4040 inch letter-size bit drills precise holes
- Jobber length gives standard reach for general use
- Non-coolant through design keeps setup simple
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Does the 135-degree split point on the 44969 cobalt bit reduce heat buildup when drilling steel all day?
The 135-degree split point is designed to start on contact and lower thrust, which helps control temperature during extended drilling in hard materials.
What size drill chuck is required to hold the .4040-inch shank of this jobber bit?
A standard three-jaw chuck that opens to at least .4040 inch will secure the straight shank of this jobber-length drill.
Will the TiAlN coating on this cobalt bit wear faster when used with an older, lower-RPM drill press?
The TiAlN coating resists wear at higher temperatures, so it actually benefits from the slower speeds and heavier feed an older drill press typically provides.
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