External-Coolant / Solid Carbide Drills
Rigid drilling with coolant delivered from outside the tool.
View tool range →Holemaking · Depth, entry and coolant
Carbide Drills
Compare solid carbide, coolant-through, spot, step and long-reach drills, alongside existing modular and flat-bottom drilling ranges.
Drill selection starts with the hole rather than the coating. Specify diameter, depth, entry surface and whether the hole is blind or through. Then compare external-coolant, internal-coolant, spot, step and modular options against the material and machine.
Production holes Stepped features Deep or obstructed access
Explore the family
Carbide Drills range
Compare the feature each tool solves, then open the relevant range for application and ordering details.
DLC-Coated Drills for Aluminum
Coating and geometry selection for drilling aluminum alloys.
KY TOOLS range illustration. The exact tool geometry and coating are confirmed with your specification.
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Custom Solid Carbide Step Drills
Multiple hole diameters or a hole and chamfer in one tool.
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Long-Reach Carbide Drills
Drilling where fixtures, part features or hole depth require extended reach.
KY TOOLS range illustration. The exact tool geometry and coating are confirmed with your specification.
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Application guide
Where carbide drills fit.
Use the part feature and its acceptance requirements to narrow the tool choice.
Production holes
Review repeatability requirements and the planned downstream finishing process.
Stepped features
Dimension the axial relationship between the hole, counterbore and chamfer.
Deep or obstructed access
Separate hole depth from the extra length needed to clear fixtures.
Application & selection
Describe the hole before choosing the drill.
Use the drawing and actual machining conditions to define a configuration for this tool family.
Depth and bottom geometry
Give the required cylindrical depth separately from the total drilled depth. Identify blind and through holes and mark any bottom-shape requirement. Point geometry and bottom clearance can affect whether the usable hole meets the drawing.
Entry and exit surfaces
Show angled faces, cross holes and interrupted exits. Include any pilot or spot operation already planned. Entry preparation should be reviewed with the chosen drill geometry rather than assumed necessary or suitable for every tool.
Coolant delivery
State whether coolant is available through the spindle and tool, or only externally. Include machine limitations and hole access. An internal-coolant drill requires a compatible supply arrangement; its presence in the catalog does not establish compatibility with every machine.
Hole versus assembly reach
Separate the drilled depth from extra length required to clear fixtures or adjacent geometry. Provide the holder envelope and a section of the setup. A long assembly should solve a demonstrated access need.
Application & selection
Compare drill structures by the feature they solve.
Use the drawing and actual machining conditions to define a configuration for this tool family.
Solid and modular drills
Compare the required diameter, depth and production setup before choosing a solid or replaceable-tip system. Include holder and interface requirements for modular options. A change in tool structure should be reviewed against the existing machine and process.
Step and flat-bottom features
Dimension each diameter, axial step and bottom requirement. State whether the tool enters solid material or follows an existing hole. This distinguishes a combined stepped operation from finishing an already prepared feature.
Hole acceptance
Identify whether size, position, finish or a downstream operation controls the result. If reaming or another finishing step follows, include its stock requirement. The drill request should explain what must be left for the next tool.
Selection & configuration
Define the details that change the tool.
Choose the drill from hole depth-to-diameter ratio, entry and exit geometry, workpiece material and coolant access. Deep holes need a validated chip evacuation and entry strategy.
| Decision | What to specify | Why it matters |
|---|---|---|
| Hole geometry | Diameter, depth and entry/exit conditions | Cross holes and inclined surfaces can change the process review. |
| Coolant | Delivery, pressure and filtration | The available system must match the selected drill construction. |
| Final requirement | Size tolerance and surface finish | Some holes require a separate reaming or finishing operation. |
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Build your configuration brief
Include these details so the tool dimensions and application can be reviewed together.
- Hole diameter and depth
- Through or blind hole
- Material
- Tolerance
- Coolant pressure
- Entry condition
From drawing to inspection
Agree on what needs to be measured.
A tool specification should describe both the cutting geometry and the acceptance requirements. Mark critical dimensions on the drawing and discuss how they will be checked before ordering.
- Geometry reviewConfirm the profile, working length, access and critical dimensions.
- Inspection requirementsSpecify dimensional or profile checks and any reporting requirements.
- Application verificationAgree on sample evaluation where a new material, geometry or process needs a trial.
Selection questions
Before you order.
Practical answers for carbide drills.
Do I need an internal-coolant drill for every hole?
Not necessarily. Compare hole depth, chip evacuation, material and the coolant system available. An internal passage is useful only when the holder and machine can supply the intended delivery.
What should I include when requesting carbide drills?
Hole diameter and depth; through or blind hole; material; tolerance; coolant pressure; entry condition. Add the quantity and delivery destination. A drawing or marked part section helps identify critical dimensions and clearance constraints.
How are dimensions and delivery confirmed?
The quotation and agreed drawing define the tool configuration, inspection scope, quantity and delivery schedule. Reference images show the tool family; use the confirmed specification for ordering.
Start with your application
Request carbide drills.
Send your drawing or machining requirement. Your selected tool category and a checklist will be carried into the inquiry form.