Product Detail
Micro Carbide Drills for Small Holes
Confirm diameter, L/D, workpiece material, guidance/coolant, and runout limits, then send a drawing for micro carbide drill RFQ.
Micro drilling · solid carbide
Micro Carbide Drills for Small Holes
Confirm diameter, L/D, workpiece material, guidance/coolant, and runout limits, then send a drawing for micro carbide drill RFQ.
- Confirm diameter and L/D before locking flute length or shank
- Match workpiece material to guidance, chip exit, and coolant path
- Review clamping runout and inspection method before production RFQ
Diameter and L/D come first
Lock finished hole diameter (or drill diameter) and required depth or L/D before flute length or shank. Unconfirmed stock diameters are not listed as standard range, blank cells mean to your drawing.
- Diameter Finished hole or drill Ø. Match print tolerance, do not round to a “close” catalog row.
- L/D or depth Depth relative to diameter drives flute length, peck strategy, and coolant path.
- Guidance Bushing, pilot, or free entry, state which applies on the RFQ.
- Related hubs Broader drills on carbide drill bits and solid carbide drill; process context on small-diameter holemaking.
Workpiece material
Material class changes chip behavior and heat. Do not claim one micro drill suits every alloy.
Aluminum / copper / soft alloys
Chip packing and built-up edge dominate. Prefer clear chip exit and confirm coolant or MQL on the print.
Steels & stainless
State hardness / condition and whether the cut is continuous or interrupted. Runout and peck strategy matter more as L/D grows.
Hardened or abrasive stock
Send hardness and duty description. Quotation follows engineering review, not a published universal hardness limit.
Guidance, chip evacuation, and coolant
Treat guidance, chip exit, and coolant as review conditions, not optional footnotes.
| Input | Why it matters | If unknown |
|---|---|---|
| Guidance / bushing | Controls entry walk on small Ø | State free entry vs bushing · to your drawing |
| Chip evacuation | Deep L/D packs chips; peck may be required | Note depth, peck plan, and flute style if known |
| Coolant path | Flood vs through-tool vs MQL changes heat and chip exit | Coolant type + available pressure if known |
| Machine / spindle | Speed and rigidity limits interact with L/D | Spindle type and max RPM if known |
Clamping runout and inspection
Micro drills fail early when tip TIR is ignored. Holder type and inspection method belong on the RFQ.
What to decide here vs later
Here: diameter, L/D, material, coolant path, and holder type.
Later (engineering): exact series, flute geometry, and supply confirmation.
Browse related drills on products or open the RFQ form when the print is ready.
Custom and RFQ
Upload a hole section when possible. Engineering confirms diameter, L/D, and runout assumptions before locking a series. Unconfirmed stock codes are not listed as standard range.
- Known series + print: send both for cross-check and supply confirmation.
- Only a workpiece print: send material, hole Ø/depth, coolant path, and holder type for preliminary selection.
- Quotation timing: after complete drawing information, quotation typically takes 1–2 working days (quotation only, not production lead time).
Selection guide
One row per task. Empty numeric cells mean confirm from drawing, not zero.
| Task | Diameter | L/D | Material | Coolant / guidance | Next |
|---|---|---|---|---|---|
| Shallow small hole | to your drawing | Low · to your drawing | Alloy / condition | Flood or MQL · confirm | RFQ |
| Deeper micro hole | to your drawing | High · to your drawing | Alloy / condition | Through-tool preferred · confirm | RFQ |
| Sticky non-ferrous | to your drawing | to your drawing | Al / Cu / soft alloy | Chip exit critical · confirm | RFQ |
| Hard / abrasive | to your drawing | to your drawing | Hardened / abrasive | Runout + coolant review | RFQ |
Blank cells are intentional. Unconfirmed series dimensions are not shown as “standard range.”
Micro carbide drill FAQ
Answers state decision conditions and next steps. They do not replace application approval.
What diameter and L/D should I send?
Send finished hole diameter (or drill diameter), required depth or L/D, material, and whether peck or continuous feed is planned. Blank catalog cells mean confirm from drawing, not a published universal range.
Do micro carbide drills need special coolant?
Often yes for deeper L/D. State coolant type (flood / through-tool / MQL) and available pressure if known. Guidance and chip exit dominate over brand claims.
How do I check clamping runout?
State holder type (collet / shrink / hydraulic), target TIR at the tip if known, and inspection method. Unverified runout claims are not published as stock specs.
Why is there no public stock list or price?
HENTRY quotes from application data and approved supply scope. Unconfirmed series rows are not shown as standard range. Quotation typically follows within 1–2 working days after complete drawing information.
Send a Micro Drill Drawing
Page N006 · Product Micro Carbide Drills for Small Holes. Required: email, product or task, requirement description. Optional: drawing upload, company, material, sizes, machine, quantity. "Model uncertain" is allowed.
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