CYCLE TIME · AUTOMOTIVE & EV
Combination Drill–Ream — Fewer Stations When the Process Window is Real
A combination drill-ream tool can remove a tool change and shorten the hole cycle when material, preparation, and tolerance stack allow one qualified pass. It is not automatic savings: poor chip control or unclear tolerance ownership makes combo tools expensive scrap. Use this page to decide fit vs no-fit, then RFQ XRZ combination drill-reamers with the hole print attached.
FIT
Fit cases
- Stable aluminum / non-ferrous holes with clear Ø and tolerance ownership
- Machine rigidity and holder runout that can support a combined edge
- Chip exit that is planned—especially on through holes with known depth
NO-FIT
No-fit cases
- Wild casting variation that makes one-pass size unpredictable
- Ultra-tight unrelated datums that need separate process control
- Blind chip nightmares without a chip plan
Critical housing bores may still want a dedicated PCD reamer after a carbide drill—see Aluminum EV housings.
COMPARE
Combination vs separate drill + ream
| Combination drill-ream | Separate drill + ream | |
|---|---|---|
| Stations | One tool change removed when qualified | Two tools; clearer ownership of each cut |
| Risk | Scrap can erase cycle gain | More forgiving when variation is high |
| Best when | Stable Al window, clear tolerance | Tight control, ferrous, or messy chips |
QUALIFY
Qualification mindset
- Trial on representative stock—not a single lucky hole.
- Watch wear land and diameter drift; define change criteria before volume.
- We do not publish fake guaranteed life hours—life follows setup and material.
PRODUCT
Product CTA
Primary combination entry: Combination drill-reamer. Keep PCD Reamer and Solid Carbide Drill Bits as the separate-path defaults.
FAQ
Combination tools FAQ
Always faster than two tools?
Only if qualified; scrap wipes the gain.
Works in steel?
Discuss per print—do not assume.
Replace PCD reamer entirely?
Combo is a process choice; critical bores may still want dedicated reaming.
What to send?
Hole chart, material, volume, machine, and coolant.
Same scenario: Aluminum EV housings · Engine & transmission holes · PCD aluminum · ← Hub
RFQ
Attach the hole print—we’ll say fit or no-fit honestly
Quote combination drill-reamers when the window is real; otherwise keep drill + ream separate.
NEXT STEP — CORE TOOLS & RFQ
Specify the finished hole / face requirement, then choose the conversion path: