CNC Milling

Professional CNC milling services for demanding industries

Comprehensive CNC machining for demanding clients

ZDANMILL offers comprehensive CNC milling services for metals and plastics based in Poznań. We carry out milling projects from individual prototypes to production series for the automotive, machinery, electronics, and other industrial sectors. Modern CNC machines and an experienced team of operators guarantee machining precision of up to ±0.01mm.

What is CNC milling?

CNC milling is a cutting method in which material is removed by a rotating multi-edge tool - a milling cutter. Unlike turning, where the workpiece rotates, in milling the workpiece is stationary or moves linearly, while the milling cutter performs the rotary motion.

Key features of CNC milling:

  • Tool rotates at high speed (thousands of RPM)
  • Workpiece moves in 3, 4, or 5 axes
  • Ability to create complex spatial shapes
  • High precision and dimensional repeatability
  • Process automation according to programmed G-code

Milling of aluminum and aluminum alloys

Aluminum is the most frequently milled metal due to its excellent machinability, low density, and good mechanical properties.

Aluminum alloys we mill:

  • Al 2024, 7075 – high strength (aviation, sports, automotive)
  • Al 6082, 6060 – universal structural applications
  • Al 5083, 5754 – corrosion resistance (marine industry)

Applications of aluminum milling:

  • Electronic device housings
  • Radiators with cooling fins
  • Gearbox housings for automotive
  • Frames and structures of lightweight machines
  • Flanges and adapters
  • Prototypes and concept models

Advantages of aluminum milling:

  • Very good machinability (high cutting speeds)
  • Possibility of thin walls (even 0.5mm)
  • Excellent surface quality
  • Possibility of anodizing after machining

Precision: Tolerances up to ±0.01mm, roughness Ra 0.8-3.2 µm

Milling of structural and alloy steel

Structural steel is the basic material for machine parts requiring high strength and rigidity.

Steel grades we mill:

  • C45, C45E – most popular steel for mechanical elements
  • 42CrMo4, 41Cr4 – alloy steel for loaded components
  • S235, S355 – structural steel for frames and structures
  • 18HGT – steel for carburizing and hardening

Applications:

  • Bearing and gearbox housings
  • Machine mounting plates
  • Connection flanges
  • Welded frames and structures (milling after welding)
  • Gears (milling before hardening)

Challenges in steel milling:

  • Higher cutting force (slower speeds than aluminum)
  • Greater tool wear
  • Need for intensive cooling

Precision: Tolerances up to ±0.02mm, possibility of more precise machining after heat treatment

Milling of stainless and acid-resistant steel

Stainless steel requires specialized knowledge due to its tendency to harden and more difficult machinability.

Stainless steel grades:

  • 304 (1.4301) – universal stainless steel, low carbon
  • 316 (1.4401) – acid-resistant steel with molybdenum (aggressive environments)
  • 303 (1.4305) – free-cutting steel, better machinability

Applications:

  • Equipment for food industry
  • Chemical and petrochemical apparatus
  • Components for marine industry
  • Medical device elements
  • Installation fittings

Specifics of stainless steel milling:

  • Low cutting speeds
  • High cutting forces (tool edge)
  • Tendency to work hardening
  • Requires experienced operator
  • Intensive cooling

Precision: Tolerances up to ±0.02mm

Milling of tool steel

Tool steel is used for production of injection molds, dies, and other production tools.

Tool steel grades:

  • NC6 (1.2714), NC10 (1.2738) – injection molds
  • K340 (1.2601) – blanking dies, punches
  • HS6-5-2 (1.3343) – high-speed steel

Typical process:

  • Milling in softened state (before hardening)
  • Heat treatment (hardening at client’s or partner’s)
  • Finishing grinding (optionally at our facility)

Applications:

  • Injection molds for plastics
  • Blanking and stamping dies
  • Punches, blanking tools
  • Tools for plastic forming

Precision: ±0.02-0.03mm before hardening, ±0.005-0.01mm after grinding

Milling of brass, copper, bronze

Non-ferrous metals with excellent electrical and thermal conductivity.

Applications:

  • Electrical terminals and connectors
  • Installation fittings (valves, fittings)
  • Decorative elements
  • Sliding components (bronze)
  • Radiators and heat exchangers (copper)

Advantages of brass milling:

  • Very good machinability
  • Excellent surface quality
  • Possibility of polishing
  • Fast machining

Milling of plastics (polymers)

Plastics require specialized knowledge of machining parameters and material properties.

Engineering plastics:

  • Polyamide PA6, PA66 – gears, guides, bearings
  • Polyoxymethylene POM-C – best dimensional stability
  • Polycarbonate PC – high impact resistance, possibility of transparent elements
  • Polyethylene PE-HD, PE-UHMW – very low friction

Specialty plastics:

  • PEEK – high operating temperature (up to 260°C), aviation/medical industry
  • PTFE (Teflon) – lowest friction coefficient, chemical resistance
  • PVC – rigidity, atmospheric resistance

Challenges in polymer milling:

  • Low melting temperature (risk of local melting)
  • Tendency to deform
  • Proper selection of cutting speed
  • Minimal clamping forces (soft material)
  • Special tools (sharp angles, minimal friction)

Applications:

  • Gears and transmissions (PA, POM)
  • Sliding bearings (PTFE, POM)
  • Gaskets and seals (PE, PTFE)
  • Elements for food industry (PE, PP)
  • Electrical insulators (PC, PEEK)
  • Medical components (PEEK)

Precision: Tolerances up to ±0.05mm (depending on material and size)

Our offer

Send inquiry

📧 Email: biuro@zdanmill.pl

📞 Telephone: +48 693 672 266

✅ Quote within 24h

✅ Free consultation

✅ 10+ years of experience

Face milling

Machining of flat surfaces to achieve required dimensions and roughness.

Applications:

  • Mounting plates
  • Structural bases
  • Contact surfaces for gaskets
  • Bearing surfaces

Tolerances: ±0.02-0.05mm, roughness Ra 1.6-6.3 µm

Contour milling

Creating 2D and 3D shapes according to designed contour.

Applications:

  • Housings with complex shapes
  • Injection molds
  • Decorative elements
  • Concept prototypes

Capabilities: Any curves, arcs, splines according to CAD model

Pocket milling

Recesses in material of various shapes and depths.

Applications:

  • Spaces for electronic components
  • Mounting pockets
  • Chambers in housings
  • Element weight reduction

Geometries: Rectangular, circular, irregular according to design

Slot and keyway milling

Narrow cutouts of various cross-sectional shapes.

Applications:

  • Slots for feather keys
  • Keyways for wedges
  • Slots for retaining rings
  • Cooling channels

Types: Straight, shaped, spiral, threaded grooves

Drilling and boring of holes

Machining of holes of various diameters and tolerances.

Capabilities:

  • Drilling holes Ø1-50mm
  • Boring to tolerances H7, H8
  • Countersinking for screw heads
  • Conical center drilling

Hole tolerances: Up to ±0.01mm for precision diameters

CNC threading

Cutting internal and external threads.

Capabilities:

  • Metric threads M3-M30
  • Imperial threads
  • Special threads according to standards
  • Multi-start threads

Precision: Tolerance class 6H (standard)

Industries we serve

Automotive

Milling of components for the automotive industry requires the highest precision and repeatability.

Projects:

  • Transmission and gearbox housings
  • Flanges and adapters for exhaust systems
  • Sensor and actuator housings
  • Precision sleeves for steering systems
  • Suspension elements
  • Prototypes of new components

Materials: Aluminum 6082, 7075, structural steels, PA6 Series: From prototypes to series of 1000+ pieces

Production of spare parts and components for industrial machines.

Projects:

  • Bearing housings and guides
  • Mounting plates for modules
  • Industrial automation elements
  • Flanges and mechanical connections
  • Gearbox and motor housings

Materials: Structural steels C45, S235, aluminum, cast iron Features: High strength requirements, assembly accuracy

Precision housings and mounting elements for electronic devices.

Projects:

  • Housings for measuring instruments and controllers
  • Aluminum radiators with cooling fins
  • PCB mounting plates
  • EMI shielding elements
  • Operator fronts and panels

Materials: Anodized aluminum, transparent PC, steels Features: Aesthetic finish, assembly precision, possibility of engraving labels

Stainless steel elements for production lines compliant with hygiene standards.

Projects:

  • Sleeves and guides for packaging machines
  • Elements of mixers and homogenizers
  • Components of dosing pumps
  • Sensor and detector housings

Materials: Stainless steel 304, 316L (material certificates) Features: Surface treatment for passivation, no bacterial retention

Precision machining for medical and dental industry.

Projects:

  • Diagnostic equipment components
  • Medical device housings
  • Surgical tools (semi-finished products)
  • Implant elements (prototype machining)

Materials: Titanium Grade 5, surgical steel, medical PEEK Features: Highest precision, possibility of documentation (protocols, certificates)

Technical capabilities

Machining dimensions

Maximum area: 600 x 400 x 300 mm
Min dimensions: from 5 x 5 mm

Dimensional tolerances

Standard: ±0.05 mm
Precision: ±0.02 mm
Maximum precision: ±0.01 mm (for critical dimensions)

Surface roughness

After rough milling: Ra 6.3-12.5 µm
After finish milling: Ra 1.6-3.2 µm
After precision milling: Ra 0.8-1.6 µm
After polishing: Ra < 0.4 µm (for aluminum)

*HSM (High Speed Machining)

Production series

Unit production: 1-5 pieces (prototypes, spare parts)
Small series: 10-100 pieces
Medium series: 100-1000 pieces
Large series: over 1000 pieces (with price negotiation)