Aluminum EV Housings — Hole and Face Tooling that Holds Tolerance

EV aluminum housings combine soft, gummy stock with tight hole positions and large faces. A stable path is usually carbide drilling (often coolant-aware) → PCD reaming for critical bores, and PCD milling for faces, windows, and pockets. Match geometry to feature—don’t reuse one end-mill story for every wall. Start from the print: which holes are fit-critical, which faces are sealing/datum.

PCD Reamer Solid Carbide Drill Bits Request Engineering Quote Custom Tool RFQ

FEATURES

Housing features that drive tooling

Fit holes and bearing seats that sell position and diameter
Connector / sensor holes with depth and chip-exit constraints
Sealing and datum faces where flatness and finish matter
Thin walls and windows that punish chatter and uneven stock removal

This page owns the housing feature stack. For “why PCD on aluminum” geometry cues, see PCD for high-speed aluminum. For everyday boxes/brackets that are not EV housings, see General Mechanical.

HOLE STACK

Hole stack: drill → measure → PCD ream

Choose a solid carbide drill series for the pre-hole (coolant and depth ratio first).
Measure what the reamer will inherit—taper, walk, and chip packing kill finish reams.
Use a PCD reamer on tolerance/finish-critical bores; not every housing hole needs PCD.
When one station must replace two, evaluate a combination drill-ream path—only with a real process window.

FACES & POCKETS

Face & pocket milling with PCD

Faces, windows, and pockets need geometry matched to the feature—square, face, or helical styles each serve a different cut. Browse the PCD milling cutter hub for series direction; do not paste one end-mill recipe onto every wall thickness.

Sealing / datum faces — prioritize consistency and edge condition over one-pass bravado.
Windows / pockets — watch chip evacuation and thin-wall chatter.
Deep geometry compare lives on product series pages—not here.

CHIP & COOLANT

Chip, BUE, and coolant—practical notes

Aluminum BUE shows up as finish fade and diameter drift—edge condition and coolant matter as much as speed claims.
Through-coolant helps deep or blind features; flood alone is not always enough.
Cast skin and silicon content change wear—send alloy and process (HPDC etc.) with the RFQ.

TOOL MAP

Tool map for EV housings

Feature	Path	Product
Pre-hole / open hole	Carbide drill by depth & coolant	Solid Carbide Drill Bits
Critical bores	PCD ream after controlled pre-hole	PCD Reamer
Faces / pockets / windows	PCD milling by feature	PCD milling cutter
Fewer stations	Qualify combo drill-ream	Combination drill-reamer