An RFQ that only says “carbide drill Ø6” forces the factory to guess L/D, coolant path, and scrap mode—so the quote round dies in clarification emails.
This page is the solid carbide drill field template—sibling to the PCD reamer RFQ checklist. Put the create-hole facts on one sheet so Cost per Good Part is discussable, then submit Custom Cutting Tool RFQ. Series choice stays in Choose Carbide Drill Series by Material; selection worksheets stay in Precision Holemaking Selection Guide.
Hole job fields (not diameter alone)
Diameter alone is not a job. Send enough that L/D and chip exit are real:
- Nominal diameter and any create-only tolerance band
- Depth and full-diameter depth (so L/D is measured, not guessed)
- Through vs blind; bottom clearance if blind
- Cross-holes, angled entry, interrupted cuts
- Entry/exit condition (pilot, cast skin, breakout support)
Multi-diameter create? Note steps early—step carbide drill may be in scope, but still attach the full drawing.
Material and condition
Name exact grade and condition. Add hardness (HRC/HB) when the part is hardened or “hard” is vague. For stainless, flag work-hardening risk; for hardened steel, treat hardness as a gate—not a coating slogan.
- Stainless playbook: Carbide Drilling Stainless: Work-Hardening Playbook
- Hardness window: Carbide Drills in Hardened Steel
- Series framing: Choose Carbide Drill Series by Material · hub Solid Carbide Drills
Mark unknown honestly (hardness, Si% on Al create holes) rather than inventing a number to force a quote.
Machine, holder, stickout, runout
List spindle interface, holder type, overhang/stickout, and measured assembled runout when you have it. Uneven edge load from runout often looks like “wrong diameter” or random breakage—setup first: Fix Stickout and Runout Before You Change Drill Geometry. Geometry vocabulary only after setup is stated: Solid Carbide Drill Geometry.
Coolant and chip reality
State flood vs through-coolant capability. Write pressure unknown when you do not have a bar reading—do not invent one. Note packing, burnt chips, or wall scratches.
- Packing checklist: Carbide Drill Chip Packing Checklist
- Deep L/D / peck: Deep-Hole Carbide Drilling
- Through-coolant when flood fails: Through-Coolant Carbide Drilling · product through-coolant carbide drill
If coolant path and chip notes are already clear, attach the drawing now for an engineering screen—you do not need every optional field filled to start.
Failure mode, volume, Cost per Good Part → RFQ
Name the scrap mode that drives the ask:
- Breakage — Why Solid Carbide Drills Break
- Oversize / taper — Oversized Holes with a New Carbide Drill
- Glaze / burn / packing
Add annual/batch volume, holes per part, and regrind/reorder intent if known. Incomplete packets do not create a faster price—they create low-confidence quotes and revision loops. Complete packet → Cost per Good Part talk without fake Nx → Custom Cutting Tool RFQ · product Solid Carbide Drill.
Distributors attaching plant data: Distributor Cutting Tool Program.
Frequently Asked Questions
### Is a photo of the broken drill enough without a drawing?
Useful evidence, not a substitute. Attach the drawing (or model) plus depth, blind/through, and scrap mode.
What if coolant pressure is unknown?
Write pressure unknown, state flood vs through-coolant hardware, and describe chip behavior. Do not invent a bar number to “complete” the form.
Do I need hardness for stainless or hardened-steel RFQs?
Yes when the grade is hard or “hardened” is claimed—scale (HRC/HB) plus where measured. Stainless still needs exact grade even if hardness is soft-annealed.
How is this different from the PCD reamer RFQ checklist?
This sheet is for create-hole drills (depth, chip exit, coolant to the tip). The reamer RFQ checklist owns finish-bore fields (allowance, Si% for PCD finish, size/finish acceptance).
Next step
Fill the fields above, attach the drawing, and request an engineering review—quote quality tracks input quality.