Precision CNC Boring Services
DEK's CNC boring services enlarge pre-drilled holes to ±0.005mm with smooth, aligned bores. Engineer-reviewed quotes within 6 hours, from one prototype to volume runs.
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±0.005mm
Bore Tolerance
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6 hours
Quote Turnaround
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2300+
Engineer Clients
Precision Boring for Precision-Fit Components
CNC boring enlarges and finishes holes that already exist, whether drilled or cast. Unlike CNC drilling, which creates a new hole, boring corrects diameter, roundness, alignment and surface finish so shafts, bearings and fasteners fit as designed.
Our modern CNC boring mills handle both small precision parts and large, heavy-duty components, from custom prototypes to large-scale production. Typical jobs include engine blocks, gear housings, hydraulic components and machine frames, all inspected in-house.
Why Engineers Choose DEK for Boring
Engineer-reviewed pricing, no order limits and multi-axis equipment: what sets DEK apart on bored parts.
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Engineer-Reviewed Quotes
Mechanical engineers with 10+ years of experience review every drawing, including heat treatment and tight tolerance needs, and quote within 6 hours.
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No Order Limits
No minimum quantity on CNC boring orders. A one-off prototype and a full production run get the same level of quality and precision.
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Tight Tolerance Boring
Tolerances up to ±0.005mm for flawless hole alignment and diameter control, essential in automotive and aerospace parts where slight deviations cause failure.
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Cost-Effective Setups
Optimized machine setups and streamlined processes reduce waste and machining time, and our in-house expertise passes those savings directly to you.
In-House Quality Inspection
Strict quality control runs during production, followed by final inspection with high-accuracy inspection tools. Every job runs through our ISO 9001:2015 quality system, and parts ship with identification labels.
Boring Capabilities, Materials & Finishes
From tight tolerance bores to complex internal geometries, here is what our boring cells deliver in metals and engineering plastics.
CNC Boring vs. Drilling and Manual Machining
Choose boring when an existing hole must reach exact size, roundness and alignment. Compare the steps in our drilling vs boring vs reaming guide.
| Criteria | This ProcessCNC Boring | CNC Drilling | Manual Machining |
|---|---|---|---|
| Role | Enlarges existing holes | Creates new holes | Hand-controlled cutting |
| Final hole quality | Exact diameter, smooth bore | May need refining | Less consistent |
| Tolerance | Up to ±0.005mm | Refined by boring | Operator dependent |
| Large, heavy parts | Suited | n/a | Not practical |
| Rework | Significantly reduced | n/a | Manual rework |
| Choose when | Fit and alignment are critical | A new hole is needed | n/a |
Industries That Rely on Bored Parts
Automotive, aerospace, energy and heavy machinery programs send us bores where fit, alignment and long-term reliability are critical.
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Aerospace
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Medical
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Automotive
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Robotics
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Semiconductor
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Electronic
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Telecom
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Drone & UAV
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Energy
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Oil & Gas
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Marine
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Industrial Equipment
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Construction
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Agriculture
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Consumer Products
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Military & Defense
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Mining
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AerospaceNon-flight-critical brackets, cabin hardware and fittings under AS9100D, in 7075 aluminum, Ti-6Al-4V and Inconel 718, with FAI.Learn More -
MedicalInstrument shafts, handles and cannulas in 316L stainless, titanium and PEEK under ISO 13485, with lot traceability as standard.Learn More -
AutomotivePrototype and low-to-mid-volume sensor housings, valve bodies and shafts in aluminum, 4140 and 4340 alloy steel, stainless and brass.Learn More -
RoboticsJoint housings, harmonic drive flanges and gripper fingers in aluminum and hardened steel, with 5-axis milling in one setup.Learn More -
SemiconductorChamber components, wafer handling fixtures and vacuum flanges in 6061 aluminum, 316L, PEEK and Kovar, with burr-free edges.Learn More -
ElectronicConnector bodies, heat sinks, RF shields and precision pins in aluminum, brass and copper, held to ±0.01 mm on contact features.Learn More -
TelecomWaveguide components, filter housings and RF enclosures in aluminum and copper alloys, with silver or nickel plating for conductivity.Learn More -
Drone & UAVMotor mounts, gimbal frames and landing gear fittings in 7075 aluminum, titanium and magnesium to cut weight without losing stiffness.Learn More -
EnergyBattery end plates, busbars, inverter housings and fuel-cell fittings in aluminum, copper and stainless, machined flat and burr-free.Learn More -
Oil & GasValve components, manifold blocks, downhole tool parts and flanges in 4140, 17-4 PH, duplex 2205 and Inconel, with hardness specs.Learn More -
MarinePropeller shafts, pump parts and deck hardware in 316 stainless, bronze and aluminum bronze, chosen first for corrosion resistance.Learn More -
Industrial EquipmentGripper plates, linear guide mounts, cam followers and machine frames in aluminum and steel, with fixtures kept on file for repeats.Learn More -
ConstructionStructural brackets, anchoring hardware and hydraulic fittings in mild steel, alloy steel and aluminum, zinc plated or powder coated.Learn More -
AgricultureGearbox housings, shafts, sprayer nozzle bodies and sensor mounts in cast iron, steel and stainless for abrasion and moisture.Learn More -
Consumer ProductsKnobs, handles, enclosure parts and audio hardware where the machined surface shows, anodized, bead blasted or polished to sample.Learn More -
Military & DefenseOptical mounts, enclosures and accessory rails in aluminum, steel and titanium, with material certification and FAI reports.Learn More -
MiningWear plates, bushings, crusher components and hydraulic fittings in hardened alloy steel, bronze and stainless for dust and vibration.Learn More
Bore Features & Challenges We Solve
From engine blocks to underwater fittings, these are the bore types and problems our engineers solve on CNC boring jobs.
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Deep-Hole Boring
Deep bores produced on advanced multi-axis equipment, a feature standard machining can't achieve with the same accuracy.
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Angled Bores
Angled bores within complex internal geometries, machined on advanced multi-axis machining equipment.
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Multi-Surface Alignment
Bores aligned across several surfaces so shafts and bearings fit as designed, key for gear housings and machine frames.
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Large & Heavy-Duty Parts
Large castings and heavy components bored with accurate hole dimensions and consistent surface quality.
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Small Precision Parts
Small precision components bored with the same repeatability, from connectors and fittings to surgical implants.
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Refining Drilled & Cast Holes
Holes that are out of round, rough or out of tolerance are corrected to exact diameter and depth for mating shafts and fasteners.
Common Challenges We Handle
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Soft, Heat-Sensitive Copper
Copper's softness and thermal sensitivity require careful machining; we deliver clean, accurate bores for electrical contacts, bus bars and heat sinks.
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Plastic Deformation
Nylon needs careful handling during boring to prevent deformation; PEEK is bored with minimal distortion and smooth internal finishes.
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Tough-to-Machine Grades
Stainless steel and titanium bored to tight tolerances on machines that minimize tool wear, for pump housings, valves and aircraft components.
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Heat-Treated Parts
Deformation after heat treatment and grinding after heat treatment are reviewed by our engineers at quote stage, so pricing reflects the real process.
Certified, Measured, Documented
Every boring job runs through the same certified quality system, through final inspection.
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AS9100DAerospace Quality Management System
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ISO 9001:2015Quality Management Standard
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ISO 13485Medical Devices Quality Management
Materials and Finishes for CNC Boring
Metals and engineering plastics bored to tight tolerances, with post-machining finishes for wear, corrosion and appearance.
Surface Finishes
Engineering Plastics
Need a material not listed here? Ask our engineers
All MaterialsHow to Order CNC Bored Parts
Get a Quote for CNC Boring Services
Metal or plastic, simple or complex: send your drawings and get an accurate, engineer-reviewed quote within 6 hours. No minimum order quantity.
- Tolerances up to ±0.005mm
- Engineers with 10+ years of experience
- One-off prototypes to full production
- In-house quality inspection
- Anodizing, plating and powder coating
Ready to Scale Your Project?
Get started with a stable process and controlled quality. Let's discuss your project.
