CNC Drilling

Process Principle & Advantages

CNC drilling is controlled by a G-code program that positions the spindle and feeds the drill at defined depths, speeds, and feed rates. Compared to manual drilling, this delivers hole location accuracy to ±0.01 mm and consistent depth control on blind holes — neither achievable by hand. For fixture plates, structural frames, and engine blocks, CNC drilling is the only practical way to hold position and size tolerances across dozens to hundreds of features on a single part.

Machining Capabilities & Equipment

Position Accuracy

±0.01 mm (standard) | ±0.005 mm (precision fixture plates)
Hole Diameter Range

Ø0.5 mm – Ø100 mm (larger via boring)
Thread Range

M2 to M64 (metric) | #2-56 to 2.5"-4 (UNC/UNF)
Surface Roughness (Reamed)

Ra 0.8 – 1.6 μm
Typical Lead Time

Samples: 3–7 days | Production: 7–20 days

CNC Milling Factory

Established	2000
Number of Machines	70+
Location	Zhongshan

CNC Turning Factory

Established	2000
Number of Machines	30+
Location	Zhongshan

Die Casting Factory

Established	2010
Number of Machines	10+
Location	Zhongshan

Injection Molding Factory

Established	2008
Number of Machines	20+
Location	Zhongshan

Forging Factory

Established	2014
Number of Machines	10+
Location	Zhongshan

Typical Part Categories

Structural Plates & Frames

Fixture plates, base frames, and machine beds with dense fastener hole patterns

Engine & Transmission Components

Oil passages, bolt flanges, precision bearing-seat bores

Electronic Enclosures & Heat Sinks

Mounting holes, connector cutouts, vent hole arrays in aluminum enclosures

Tolerance & Quality Control

Our quality system is run by an experienced QC team that tracks each job through four checkpoints: incoming material inspection, first-article confirmation (FAI), in-process sampling, and final outgoing inspection (OQC). Nothing ships without passing all four.

On the measurement side, we run CMM coordinate measurement, hardness testing, surface roughness gauging, and optical projection — and we issue dimensional reports, CMM reports, and full-inspection records on request.

Tolerances are held to ±0.005–0.01 mm across standard CNC work; tighter specs can be discussed at the quoting stage. We also support customer-defined acceptance criteria and can build a custom inspection plan around your drawings.

How a Drilling Project Works

Drawing Submission

Upload 2D drawings with hole callouts (diameter, depth, thread spec, position tolerance) and 3D model. Flag any deep-hole features or tight position requirements for early engineering review.

Tooling & Process Plan

We select drill type, tooling (HSS, carbide, TiAlN-coated), coolant strategy, and G-code canned cycles based on material and hole specifications.

First Article

Run first-off part, measure all hole positions with CMM, check thread gauges, confirm depths and surface condition.

Production Run

Execute in batch with in-process sampling at defined intervals.

Final Inspection

Full CMM for critical parts; attribute gauging for threaded holes (go/no-go); visual inspection for burrs and surface condition.

Packaging & Delivery

Thread-protected and cleaned; parts shipped in appropriate packaging to prevent hole damage in transit.

Why Choose Us

Excellent Service Support
Advanced Equipment & Quality Control
Flexible Machining Capability
Customization & Engineering Support

Excellent Service Support

We run a tight ship from first contact to final delivery — 24-hour quoting, transparent communication, and a dedicated project contact for every order.

24-hour quotation turnaround / rapid prototyping

Rush-order support for time-sensitive projects

Non-conformance resolved with corrective action and re-make at no surprise cost

Advanced Equipment & Quality Control

Our facility carries 100+ precision machines and a full suite of metrology equipment.

100+ machines — annual output exceeding 10 million parts

Precision ±0.005 mm, CMM full inspection on critical features

IQC → FAI → IPQC → OQC — every step documented and traceable

Flexible Machining Capability

Multi-process integration means one supplier for the whole part — machining, finishing, and assembly under one roof.

CNC turning, milling, 5-axis, grinding, EDM, drilling, forging, casting, sheet metal

Component assembly and multi-part coordination supported

Metals, engineering plastics, and composites — 52+ material options

Customization & Engineering Support

OEM and ODM both welcome. We work from drawings, samples, or rough concepts.

DFM analysis and structural improvement suggestions before cutting starts

Custom packaging and surface treatment specified per customer requirement

NDA available — design confidentiality strictly maintained

FAQ

Can you drill and tap in the same job?

Yes — drilling and tapping in a single setup is standard for us. We drill to the correct tap drill size, then tap in the same CNC program without re-clamping, which keeps hole position and thread alignment accurate.
How accurate is CNC drilling for hole position?

Standard CNC drilling holds hole position to ±0.01 mm. For high-density fixture plates and precision assemblies where multiple holes must align, we can run jig boring cycles to ±0.005 mm. Share your drawing and we'll flag if any features need special treatment.
Do you have experience drilling stainless steel?

Yes, and it's one of the materials where the right process parameters really matter. Stainless work-hardens quickly when the feed rate is too slow or the tool is even slightly worn. We use sharp carbide drills, adequate feed rates, and through-coolant where possible to avoid this. 304 and 316 are daily materials for us.
What's the smallest hole diameter you can drill?

With standard CNC equipment we drill to Ø0.5 mm reliably. For Ø0.3 mm and below, we use dedicated micro-drilling spindles under CNC control — these require stable fixturing and low run-out. EDM drilling is an alternative for very small holes in hardened materials.

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