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Precision Small Parts Machining

DEK delivers small parts machining for sub-25mm components and micro features, holding tolerances as tight as ±0.003 mm. No minimum order quantity, with every drawing reviewed by engineers.

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  • ±0.003 mm

    Sub-10mm Parts

  • 3 Days

    Prototype Lead

  • No MOQ

    Prototype to Batch

Micro CNC milling cutting tiny precision feature on small part
ISO Certified ISO 9001, ISO 13485, AS9100D
Finished micro machined small stainless steel parts on dark worktable

Small Parts Machining and Micromachining Services

Small parts here means anything from a compact bracket to a true micro component: sub-10mm bodies, walls under a millimeter, micro-bores and fit-critical features with no room for tool deflection or thermal drift. Medical, aerospace, electronics and robotics OEMs use it for parts general CNC shops can’t reliably hold.

DEK runs this work on high-speed-spindle milling centers and Swiss-type lathes, backed by in-house CMM inspection. Runout limits tighten as features shrink: runout negligible on a 10mm feature can consume the whole tolerance band on a 1mm one. See our micro CNC machining guide.

Why DEK for Small & Micro Parts

Micro geometry only stays in tolerance when the same process controls run on every job, not just the first article.

  • 20+ Years of Precision

    DEK has run precision machining for more than 20 years, building the process discipline that sub-10mm features demand.

  • 1.2M+ Critical Parts

    We produce over 1.2 million critical parts annually, so micro-tolerance controls are proven across volume, not on a single part.

  • 2,300+ OEM Clients

    More than 2,300 global OEM clients trust DEK with fine-feature parts for medical, aerospace, electronics and robotics programs.

  • 98.6%+ On-Time Delivery

    A 98.6%+ on-time delivery rate keeps prototype iterations and small-batch production runs on schedule.

Engineering Review Before Quoting

Send a STEP, IGES or PDF drawing with critical dimensions called out. DEK's engineering team flags any features that need special fixturing or Swiss turning before the quote is issued.

Micro-Precision Capabilities & Tolerances

From micro milling to Swiss-type turning and batch production, here is what DEK holds on small and micro-scale parts.

  • Micro Milling
  • Tolerances
  • Swiss Turning
  • Volumes
  • Quality

  • Micro CNC Machining Capabilities

    High-speed spindles handle micro milling and drilling on parts with sub-25mm envelopes down to sub-10mm components.

    • Sub-millimeter features and wall sections
    • High-speed spindles for micro milling and drilling
    • Tool runout limits tightened as features shrink
    • In-house CMM verification on every part
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    Parameter Specification
    Part envelope Sub-25mm to sub-10mm
    Minimum feature size Sub-millimeter
    Spindle type High-speed spindles
    Inspection In-house CMM, full traceability

  • Precision Micro Machining Tolerances

    Holding tolerance gets harder, not easier, as parts shrink; tolerance bands are set by part size and geometry.

    • ±0.003 mm on sub-10mm parts
    • ±0.005 mm on fit-critical assemblies
    • ±0.01 mm profile on 5-axis geometry
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    Parameter Specification
    Sub-10mm parts ±0.003 mm
    General CNC machining ±0.005 mm
    5-axis complex geometry ±0.01 mm profile control
    Fit-critical assemblies ±0.005 mm

  • Swiss-Type Turning for Micro Parts

    Swiss-type lathes support the workpiece close to the cutting point, reducing deflection on long, thin turned features.

    • Micro-diameter pins and small shafts
    • Micro bushings and connector bodies
    • No flex or chatter seen on a standard lathe
    Swiss Machining
    Parameter Specification
    Machine type Swiss-type lathes
    Typical parts Pins, bushings, small shafts
    Other turned parts Connector bodies
    Workpiece support Close to the cutting point

  • From Prototype to Small-Batch Production

    Five prototype pins and five hundred production pins go through the same qualification path, with no batch-size decision upfront.

    Small Batch Runs
    Parameter Specification
    Prototype lead time As fast as 3 days
    Minimum order quantity None
    Production lead time Confirmed per project
    Qualification path Same for 5 or 500 parts

  • Inspection Chain for Micro Tolerances

    On a sub-10mm feature, the inspection chain catches drift before it becomes scrap, not just at a final go/no-go check.

    • In-house CMM with full traceability documentation
    • SPC tracks dimensional drift over a run
    • CAPA root-cause fix on any nonconformance
    QC Equipment
    Parameter Specification
    IQC Incoming material check
    IPQC In-process monitoring
    FAI First pieces vs. drawing
    OQC Lot inspection before shipment
    SPC Dimensional drift tracking
    CAPA Root-cause corrective action

Small Parts Machining vs. Other CNC Processes

Choose small parts machining once part size drops below a few centimeters: tolerance stack, fixturing and cutting parameters all change at that scale.

Criteria This ProcessSmall Parts Machining General CNC Machining 5-Axis CNC Machining
Best for Fine-feature parts Routine brackets Complex geometry
Part size Sub-25mm to sub-10mm Above a few centimeters Multi-face parts
Typical tolerance ±0.003 mm (sub-10mm) ±0.005 mm ±0.01 mm profile
Key control Tool runout, thermal drift Standard tolerance stack Profile control

Industries Using Micro Precision

Medical devices, aerospace, semiconductor equipment, robotics and electronics OEMs rely on DEK for small, fit-critical components.

  • Aerospace

  • Medical

  • Automotive

  • Robotics

  • Semiconductor

  • Electronic

  • Telecom

  • Drone & UAV

  • Energy

  • Oil & Gas

  • Marine

  • Industrial Equipment

  • Construction

  • Agriculture

  • Consumer Products

  • Military & Defense

  • Mining

Typical Small Part Features We Machine

Micro geometry brings its own feature types, each with tighter limits on deflection, runout and finishing.

  • Micro-Bores

    Bores under a millimeter machined on high-speed spindles, then deburred chemically or manually when tools can't reach.

  • Thin Wall Sections

    Wall sections under a millimeter in alloys chosen to resist warping, with cutting parameters adapted to small parts.

  • Slender Turned Parts

    Micro-diameter small shafts and pins turned on Swiss-type lathes to avoid flex and chatter.

  • Fit-Critical Features

    Assembly features held to ±0.005 mm and verified on in-house CMM equipment with full traceability.

  • Connector Bodies & Shells

    Micro-turned brass and copper connector and electrical components for electronics and robotics assemblies.

  • Micro Medical Parts

    PEEK and PTFE micro medical and insulating parts where chemical resistance matters at small scale.

Micro-Scale Challenges We Handle

  • Tool Runout

    A runout negligible on a 10mm feature can consume the whole tolerance band on a 1mm one, so runout limits tighten as features shrink.

  • Tool Deflection

    Swiss-type lathes support the workpiece close to the cut, reducing the deflection that ruins tolerance on long, thin features.

  • Deburring Micro-Bores

    Bores below roughly 0.2mm need chemical or manual deburring, a step planned into the timeline.

  • Coating Thickness

    A coating negligible on a large bracket can close a micro-bore tolerance entirely, so finish selection is reviewed per feature.

Quality Built for Micro Tolerances

Every job runs through IQC, IPQC, FAI, OQC, SPC and CAPA under our certified system.

  • AS9100D and ISO 9001 certification logo
    AS9100D

    Aerospace Quality Management System

  • ISO 9001 certification logo
    ISO 9001:2015

    Quality Management Standard

  • ISO 13485 certification logo
    ISO 13485

    Medical Devices Quality Management

Materials & Finishes for Small Parts

DEK machines 50+ metals and engineering plastics, including PEEK and PTFE. These are the most common choices in micro work.

Metals

Surface Finishes

Need another alloy or finish? Ask our engineers about your part.

All Materials

How to Order Small Machined Parts

  • 1

    Send Your Drawing

    Upload a STEP or IGES file with a PDF drawing calling out critical dimensions.

  • 2

    Engineering Review

    Engineers flag features needing special fixturing or Swiss turning before quoting.

  • 3

    Confirm Order

    Quote, tolerances and delivery schedule are confirmed for your project.

  • 4

    Micro Machining

    Parts are milled on high-speed spindles or turned on Swiss-type lathes.

  • 5

    Inspection & Shipping

    CMM verification, traceability documentation and OQC before shipment.

Small Parts Machining FAQ

Answers on cost, lead time, feature size, inspection and files for micro parts.

How much does it cost to get small parts machined?
Cost depends on tolerance tightness, material, feature complexity and volume. A sub-10mm feature at ±0.003 mm costs more per part than a standard ±0.005 mm feature because it demands slower cuts, specialized fixturing and more inspection time. Contact DEK with your drawing for a part-specific quote.
What's the lead time for small parts machining?
Prototype parts ship in as fast as 3 days. Production lead times vary with quantity, tolerance and any finishing steps, so they are confirmed per project rather than quoted as a flat number.
What's the minimum feature size you can machine?
Features are commonly held to sub-millimeter dimensions, with tolerances down to ±0.003 mm on sub-10mm parts. Micro-bores below roughly 0.2mm require chemical or manual deburring, since mechanical tools can't physically reach them.
How do you verify tolerance on micro parts?
Every part is checked on in-house CMM equipment with full traceability documentation, following IQC, IPQC, FAI, OQC, SPC and CAPA quality stages, not just a final go/no-go check before shipment.
What file formats do you need to quote a small part?
Send a STEP or IGES file with a PDF drawing that calls out critical dimensions and tolerances. Flagging fit-critical or micro-scale features upfront lets engineering confirm fixturing and turning method before quoting.

Request a Quote for Small Parts Machining

Send a drawing or STEP file with critical dimensions called out. DEK’s engineers flag features needing special fixturing or Swiss turning before quoting.

  • Tolerances to ±0.003 mm on sub-10mm parts
  • Prototypes in as fast as 3 days
  • No minimum order quantity
  • In-house CMM inspection on every part
  • STEP, IGES or PDF drawings accepted
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