CNC Drilling Services
We provide high-precision CNC drilling for metals and plastics, holding tolerances to ±0.001″ from prototypes to production. ISO 9001:2015, AS9100D, and ISO 13485 certified, we machine complex parts with speed, accuracy, and consistent quality.
Xtproto CNC Drilling Services
We provide high-precision, fast-turn CNC drilling services for metal and plastic parts, holding tolerances to ±0.001″ and supporting micro to deep holes up to 100× diameter. Equipped with multi-axis drilling centers, multiple spindles, and diverse tooling options, we machine complex geometries in aluminum, steel, titanium, and engineering plastics for aerospace, automotive, and medical applications. From prototyping to high-volume production, our ISO 9001:2015, AS9100D, and ISO 13485–certified processes ensure repeatable quality and excellent surface finishes.
Types Of CNC Drilling
3-Axis CNC Drilling – Precision for Standard Parts
4-Axis CNC Drilling – Angled & Multi-Surface Holes
5-Axis CNC Drilling – Complex 3D Hole Machining
Our CNC Drilling Capabilities
We deliver high-precision CNC drilling solutions for metals and plastics, from micro holes to large diameters. Our advanced machines and experienced team ensure tight tolerances, consistent quality, and fast turnaround for prototypes and production runs across multiple industries.
CNC Drilling:Precision Hole Sizes & Types
From micro to deep holes, our CNC systems drill through, blind, threaded, countersunk, stepped, and angled holes with tight tolerances and consistent quality.
Hole Size Range
- Micro holes
- Standard diameter holes
- Large diameter holes
- Deep holes (up to 100× diameter)
- High aspect ratio holes
Hole Types
- Through holes
- Blind holes
- Tapped/threaded holes
- Counterbored holes
- Countersunk holes
- Stepped holes
- Reamed holes
- Alignment/dowel holes
- Cross holes
- Angled holes
CNC Drilling Tolerances & Precision
Xtproto delivers high-precision CNC drilling with tight tolerances and repeatable hole placement, ensuring accurate diameter, depth, and positioning for both prototypes and production parts. The following table summarizes our typical drilling precision and key characteristics:
| Hole Type | Tolerance & Positional Accuracy | Straightness / Repeatability & Notes |
| Standard Holes – general assemblies, prototypes, production parts | ±0.001″ (±0.025 mm), ±0.0005″ (±0.013 mm) | Consistent placement; high-precision reaming possible |
| Deep Holes – blind or deep holes | ±0.002″ (±0.05 mm), ±0.001″ (±0.025 mm) | Straightness up to 10× diameter; smooth surface achievable |
| Precision Holes – tight-fit or critical features | ±0.0005″ (±0.013 mm), ±0.0002″ (±0.005 mm) | Extreme repeatability; may require deburring or reaming |
Each hole is precisely controlled for diameter, depth, straightness, and repeatable positioning, ensuring high-quality CNC drilling across prototypes and high-volume production.
Materials We Work With
Xtproto’s CNC drilling supports a broad range of materials, from metals and plastics to composites, wood, and ceramics, delivering precise holes for prototypes and production parts across industries, with specialized processes for brittle or ultra-hard materials.
- Metals– Steel, Carbon Steel, Alloy Steel, Stainless Steel, Aluminum, Titanium, Brass, Copper, Magnesium; ideal for mechanical parts, automotive components, and housings. Uses HSS or carbide drills with optimized speed, feed, and cooling for maximum precision.
- Plastics– PMMA (Acrylic), PP, ABS, PVC, HDPE, PC, PTFE; suitable for insulation parts and protective casings. Sharp HSS or carbide drills, moderate spindle speed and feed, optional air or coolant to prevent melting.
- Composites– Carbon Fiber, Glass Fiber, Plywood; used in aerospace and specialty industrial applications. Precise drilling techniques prevent delamination and ensure clean holes.
- Wood– Hardwood, Softwood, MDF; for furniture and wood components. Standard wood drills with high spindle speed and low feed deliver clean, burr-free holes.
- Ceramics– Technical and advanced ceramics; precision-critical applications. Specialized drills ensure accuracy without cracking or chipping.
Xtproto Manufacturing Facility
Xtproto is a Shenzhen-based precision engineering company providing comprehensive CNC machining for global clients. Our factory is fully equipped with advanced CNC centers, traditional machine tools, and specialized drilling machines—vertical, turret, and radial—to handle simple to complex parts across metals and polymers.
Our experienced team operates automated production lines with tightly controlled workflows, ensuring every part meets high standards of accuracy and quality. From single-piece prototypes to small and mid-volume production runs (10–10,000 parts), we offer flexible, efficient, and cost-effective manufacturing solutions. Direct control of our processes reduces risk, improves supply chain reliability, and enables fast, scalable production without compromising quality.
Custom CNC Drilling Quality Assurance
At Xtproto, quality is at the heart of every custom CNC drilled part we produce. We rigorously inspect raw materials to meet ISO and RoHS standards, while our advanced CNC drilling machines are regularly calibrated for precision. During production, hole size, depth, angle, and position are continuously monitored. Finished parts undergo 100% inspection using CMMs and high-precision tools to ensure flawless dimensions, alignment, and surface quality.
Our quality assurance process meets ISO 9001:2015, AS9100D, and ISO 13485 standards, with full traceability. We provide material certificates (MTRs), first article inspection (FAI) reports, and CMM data sheets for complete transparency. Whether for aerospace, medical, or industrial applications, every custom drilled part from Xtproto delivers reliability and high performance.
CNC Drilling Parts
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From concept to production, we deliver precise, high-quality parts fast and reliably.
How Does CNC Drilling Work?
CNC drilling uses computer-controlled machines to create precise round holes in metals, plastics, wood, and other rigid materials. The operator uploads a CAD or CAM file with the hole size, depth, speed, and feed settings, then secures the material and installs the right drill bit. The spindle moves to drill each hole accurately, producing parts ready for screws, bolts, or custom specifications. Finished parts are inspected, packed, and shipped, while drill bits and equipment are routinely checked and maintained for reliability. Learn more about our CNC machining services.
Advantages Of Our CNC Drilling Services
Exceptional Accuracy
Our CNC drilling processes achieve tight tolerances and precise hole placement, helping customers improve part fit, reduce rework, and maintain high production efficiency. This level of accuracy supports demanding applications across aerospace, automotive, and medical industries.
High Versatility
Our CNC drilling machines support multiple tool types and sizes, allowing quick changes between drills, taps, and specialty tools. This flexibility enables us to handle a wide range of hole diameters, depths, and configurations without switching machines, reducing setup time and improving workflow efficiency.
Scalable from Prototype to Production
Whether you need a single prototype or thousands of parts, our CNC drilling services scale efficiently. The same precision and control apply at every production level, ensuring consistent results as quantities increase.
Consistent Repeatability
CNC-controlled drilling ensures that every hole is produced exactly as programmed. This repeatability is critical for custom and production machining, allowing us to deliver uniform results across batches with minimal variation and reliable quality control.
Efficient Production
Automated CNC drilling reduces manual intervention, shortens cycle times, and minimizes human error. This results in faster turnaround times while maintaining stable quality for both low- and high-volume orders.
CNC Drilling Surface Finishes & Post‑Processing
To ensure precision, durability, and ease of assembly, drilled parts often undergo additional surface treatments and post-processing steps, including protective coatings and treatments.
Deburring – Removes sharp edges and burrs left by drilling, making parts safer to handle and easier to assemble.
Chamfering – Creates a slight bevel at hole openings to guide fasteners and reduce stress concentrations.
Countersinking – Prepares holes for flat-head screws, ensuring flush installation.
Counterboring – Creates a recessed area for socket-head screws or bolts, improving fit and alignment.
Reaming – Refines hole diameter and surface finish, providing high precision and smoother internal walls.
Polishing / Smoothing – Enhances hole wall quality, reduces friction, and improves aesthetics.
Debris & Chip Removal – Ensures all metal chips and residue are cleared, preventing assembly issues or interference in moving parts.
Protective Coatings / Treatments – Optional processes like passivation or light coatings to improve corrosion resistance and part longevity.
FAQs
What is CNC Drilling?
What Materials Can CNC Drilling Handle?
How to Deal With Burrs?
Why Monitor Tool Wear?
How to Control CNC Drilling Costs?
Request Your Free CNC Machining Quote Today
After receiving your drawings, our engineers will analyze your custom CNC machining parts right away. We actively work with you to clarify all details before providing a quote that is both economical and accurate.