Custom Machined Parts to Your Drawing
DEK makes custom machined parts to your drawing in 50+ metals and plastics, from one piece to 10,000+, held to ±0.005 mm. An engineer reviews every drawing and quotes within 6 hours.
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±0.005 mm
Metal Tolerance
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6 Hours
Engineer Quote
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1–10,000+
Pieces, No MOQ
Custom CNC Machining Services for Your Drawing
Custom machined parts are the brackets, shafts, housings, manifolds, pins, fixtures and knobs and handles a product or machine is built from. DEK machines them to your drawing in 50+ metals and plastics, from one piece to 10,000+, with no minimum order quantity.
This page covers the part itself: what we make, how a drawing becomes a delivered component and how to design it to machine cleanly. The processes behind it are on CNC machining services; gear machining and custom aluminum heat sinks have their own pages.
Why Buyers Move Their Custom Parts to DEK
2,300+ customers in North America, Europe and Australia have moved custom machining services to DEK for these reasons.
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Tolerance Since 2002
Founded in 2002 making mold core pins and guide bushes, where ±0.005 mm is the starting requirement, not an upgrade.
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Every Process In-House
Milling, turning, Swiss, EDM, grinding and finishing under one roof, so grinding and finishing are never sent out to other suppliers.
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Scales Past 50 Pieces
The same drawing moves from one prototype to 10,000+ pieces; archived programs, fixtures and inspection plans keep repeat orders identical.
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Audit-Ready Paperwork
ISO 9001:2015, ISO 13485 and AS9100D (TÜV): inspection records already exist in the format medical and aerospace buyers ask for.
Engineer-Reviewed DFM Included
An engineer checks every drawing by hand for thin walls, deep pockets, unreachable internal corners and tolerances that need grinding. You get the DFM notes before the price, not after.
Part Families, Materials & Tolerances
What we machine, which materials fit each part, the tolerances we hold and how quantities scale from one piece to production.
Custom Machined Parts vs. Single-Process Sourcing
A custom part is routed to whichever processes its features need, in one order. EDM handles hardened or sharp-cornered features.
| Criteria | This ProcessCustom Machined Parts | CNC Milling | CNC Turning | Grinding |
|---|---|---|---|---|
| Best for | Finished part to drawing | Pockets, 5-axis surfaces | Round parts | Fits and finishes |
| Variants | All processes routed | 3-, 4-, 5-axis | CNC or Swiss | Diameters and faces |
| Tolerance | ±0.005 mm metal | ±0.005 mm metal | ±0.003 mm Swiss features | ±0.002 mm |
| Surface finish | Ra 0.2–1.6 µm | Ra 0.8–1.6 µm | Ra 0.8–1.6 µm | Ra 0.2–0.4 µm |
| Choose when | One supplier, all steps | Multi-face features | Turned diameters | Bearing seats, press fits |
Custom Parts for Every Industry
Medical and aerospace buyers in North America, Europe and Australia get inspection paperwork in the format their audits ask for.
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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
Design Tips for Custom Machined Parts
Small changes at the drawing stage remove most of the cost and risk; our engineers raise each one in the DFM review.
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Internal Corner Radii
Specify a radius of at least one third of pocket depth (R10 or larger at 30 mm deep). Sharp internal corners require EDM.
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Wall Thickness
Keep metal walls at 0.8 mm or thicker and plastic walls at 1.5 mm or thicker; thinner walls deflect and lose tolerance.
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Thread Depth
Tapped depth beyond 2.5× nominal diameter adds cost, not strength; call out the minimum full-thread depth.
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Tolerance Where It Matters
Put ±0.005 mm on mating features and let ISO 2768-m cover the rest; blanket tolerance raises quotes.
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Standard Hole Sizes
Use drill and reamer diameters (Ø3 H7, Ø6 H7, Ø8 H7) rather than Ø6.2 or Ø7.9, plus standard threads.
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Feature Access
Design features to be reached from as few directions as possible; each extra setup adds time and a tolerance stack.
Feature Risks We Flag in DFM
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Text and Marking
Engraved text under 0.5 mm stroke width is slow to cut; laser marking is faster and clearer for part IDs.
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Cross-Drilled Ports
Manifold ports in 6061, 316 or brass need deburred intersections and a leak test, both planned in the quote.
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Hardened Mold Details
Mold components in H13, S7, D2 and 420 need hardness, EDM detail and ground fits; heat treatment comes first.
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Shaft Runout
Shafts in 1045, 4140, 17-4 PH and 316 depend on runout and keyways; bearing seats go to grinding.
Certified Quality on Every Part
Spectrometer-checked material, CMM first articles and outgoing inspection with photos.
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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
50+ Metals and Plastics, Finishes Included
Pick the metal, plastic and finish for your CNC parts; finishes and heat treatment are quoted with the machined part.
Surface Finishes
Engineering Plastics
Need a grade not listed here? Browse all CNC machining materials
View MaterialsHow to Order Custom Machined Parts
Frequently Asked Questions
Files, order quantities, lead times and tolerances for custom parts.
Request a Quote for Custom Machined Parts
Send your drawing with quantity, material and finish. DFM notes and a price come back within 6 hours, reviewed by an engineer, not an algorithm.
- Engineer-reviewed quote within 6 hours
- No MOQ, from one piece to 10,000+
- ±0.005 mm standard on metal parts
- First article measured on a CMM
- Shipped worldwide in 3–7 days
Ready to Scale Your Project?
Get started with a stable process and controlled quality. Let's discuss your project.
