Precision CNC Machining
CNC Machining Services for Metal and Plastic Parts
Get custom CNC-machined metal and plastic parts, from rapid prototypes to mass production. Equipped with 100+ CNC machines, Weldo provides precision milling and turning backed by experienced engineers and strict quality control.
- 3-, 4-, and 5-axis CNC machining
- Tolerances as tight as ±0.0002 inch
- 50+ surface finish options
- ISO 9001:2015 certified
Core Machining Processes
CNC Milling and Turning for Different Part Geometries
Part geometry determines the machining method: milling suits prismatic and multi-sided parts, while turning is best for rotational components.
01 / CNC Milling
CNC Milling for Multi-Sided Parts
CNC milling produces flat or angled faces, pockets, slots, hole patterns, and contours. Accurate datum planning keeps multi-sided features aligned.
- Pockets, slots, hole patterns, and 3D contours
- Datum-controlled features across multiple faces
- Housings, brackets, plates, and manifolds
02 / CNC Turning
CNC Turning for Rotational Parts
CNC turning accurately produces diameters, bores, shoulders, grooves, tapers, and threads on cylindrical parts such as bushings, sleeves, shafts, and pins.
- External and internal diameter machining
- Bores, shoulders, grooves, tapers, and threads
- Bushings, sleeves, shafts, and precision pins
Integrated Machining Capabilities
Supporting Processes for Complex CNC Parts
When milling or turning alone cannot complete a part, multi-axis machining, Wire EDM, and precision grinding handle complex features and critical finishing within one coordinated workflow.
01 / Multi-Axis CNC
Multi-Axis CNC Machining
Multiple faces and compound angles can be machined in fewer setups, helping preserve datum relationships and reduce repositioning error.
Explore CNC Milling
02 / Wire EDM
Wire EDM Machining
Wire EDM cuts narrow slots, sharp internal profiles, and hardened conductive materials where conventional cutting tools have limited access.
Explore Wire EDM
03 / Precision Grinding
Precision Grinding
Grinding refines critical diameters and flat surfaces after machining or heat treatment for tighter size control and smoother finishes.
Explore Precision GrindingIn-House Manufacturing
Inside Weldo’s CNC Machining Facility
Weldo provides 3-, 4-, and 5-axis CNC machining and Wire EDM for complex metal and plastic parts. In-house programming and inspection ensure consistent quality from prototype to production.
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5-Axis CNC Machining
4-Axis CNC Machining
CNC Programming & Setup
Wire EDM Machining
CNC Machining Common Materials
WELDO provides precision CNC machining services for materials ranging from common aluminum, stainless steel, alloys, and copper to plastics such as ABS and PC etc.
Metal cnc material type:
Aluminum
It features low density and a hard texture, yet the material itself is relatively pliable. Highly corrosion-resistant, it is widely utilized in the fields of aerospace, biomimetic skeletal structures, and automotive component manufacturing.
Color : Silver.
Types : Aluminum 6061、7075、2024、5052、6063 and MIC-6.
Surface finish : Polishing, Brushing, Sandblasting, Chrome Plating, Anodizing, Electroplating, Powder Coating, Laser Etching.
Delivery time : 1-5 days.
Stainless steel
Corrosion-resistant, smooth, and easy to clean, used in kitchen, medical, construction, and automotive parts.
Color : Silver.
Types : Stainless steel 304/316/201/202/430/444/410/420/440c/2205/2507/17-4ph/17-7ph.
Surface finish : Polishing, Brushing, Sandblasting, Electroplating, Spraying, PVD (Physical Vapor Deposition), Passivation, Pickling, Coloring.
Delivery time : 2-5 days.
Copper
Possesses electrical conductivity, tensile ductility, and antimicrobial properties, primarily used for processing into crafts, decorative items, and medical equipment.
Color :Orange,yellow.
Types : copper H59/H62/Hpb59-1/C36000/HAI77-2/HSN62-1/HPb/HMn/HAl/HSn/HNi.
Surface finish : Passivation, Electroplating, Chemical Plating, Shot Peening, Sandblasting, Chemical Film Treatment, Polishing, Bright Cleaning.
Delivery time : 1-5 days.
Bronze
Bronze is a corrosion-resistant copper alloy with good fluidity and varying color by composition. It’s used for parts like bearings, gears, and marine components.
Color : gold/brown.
Types : Tin bronze, aluminum bronze, beryllium bronze, silicon bronze, manganese bronze.
Surface finish : Sandblasting, polishing, knurling, grinding, passivation, chemical film coating, impregnation coloring, brush/spray coloring, electroplating, anodizing, powder coating, brushing.
Delivery time : 1-5 days.
Steel
Iron-based alloy with Cr, Ni, and Mn, offering adjustable properties via heat treatment. Used for bolts, shafts, gears, cutting tools, and engine components.
Color : Silver .
Types : Steel S20C,S45C,S50C,SK85,SK95,40Cr,4140,4130,H13,D2,W1,A2,D2,M2,SKD11,ASP-23,S136.
Surface finish :Sandblasting, Mirror Finish, PVD Coating, Brushed Finish, Spray Coating, Electroplating.
Delivery time : 1-5 days
Magnesium
Lightweight and possesses low hardness, excellent thermal conductivity, and causes minimal tool wear. Its strength surpasses that of aluminum alloys and steel, and its damping capacity—1.5 times that of aluminum—enables it to effectively absorb vibrations and noise. Suited for use in aerospace and automotive components.
Color : Silver.
Types : Magnesium alloy AZ91D/AM60B/AM50A/AS41B/ZK60/MB8/AZ31/WE43/ZE41/LA141/LZ91.
Surface finish : Chemical conversion coating, anodizing, nickel plating, electroplating, composite coating, spray painting, powder coating, electrophoretic coating.
Delivery time : 1-5 days.
Plastic cnc material type:
ABS
Color : Beige,black.
Types : General-purpose, flame-retardant, heat-resistant, high-impact-resistant, transparent (MBS), filled modified, alloyed, functionalized ABS.
Surface finish :Spray coating, electroplating, screen printing, laser engraving, hot stamping, vacuum coating, transfer printing, sandblasting.
Delivery time : 1-5 days.
PVC
PVC is a robust, dense material characterized by excellent tensile strength and moderate elongation. Due to its resistance to chemical corrosion and aging, it is an ideal choice for corrosive environments.
Color : White,Beige,black.
Types : Rigid PVC and Flexible PVC.
Surface finish : Painting and plating, polishing, sanding
Delivery time : 1-5 days.
POM
Color : white,black,blue,yellow,etc.
Types : POM-H, POM-C.
Surface finish : Polishing, sandblasting, chemical polishing, laser polishing, anodizing/painting.
Delivery time : 1-5 days.
PTFE
PTFE offers ultra-low friction, strong chemical resistance, and excellent insulation, ideal for seals, gaskets, and bushings.
Color : White, natural, black, filled or custom-colored.
Types : Virgin PTFE，Glass-filled PTFE，Carbon-filled PTFE，Bronze-filled PTFE，Modified PTFE
Surface finish : Machining finish, polishing, texturing, coating, engraving, anti-static treatment.
Delivery time : 1-5 days.
PMMA
Color : clear,white,black,colored.
Types : General-purpose / Impact-resistant / Heat-resistant / Pearlescent.
Surface finish : Polishing, enhanced coating, sandblasting for texture, printing for coloring, anti-scratch and anti-fingerprint treatments.
Delivery time : 1-5 days.
PC
High-performance thermoplastic with excellent toughness, rigidity, and insulation—lightweight and ideal for CNC-machined electronic components.
Color : white or black.
Types : General Machinable/Flame Retardant/Reinforced/Blended PC.
Surface finish : Polishing, Hardening, Spraying, Laser Engraving, Electroplating, Hot Stamping.
Delivery time : 1-5 days.
FR4
FR4 is a glass-fiber epoxy laminate with high strength, excellent insulation, and stable performance. It’s widely used for structural and insulating parts like spacers, brackets, and mounting plates.
Color : Yellow, green, black, white, natural
Types : Standard FR4 / High-Tg FR4 / Halogen-free FR4
Surface finish : Machining finish, polishing, sandblasting, coating, painting, laser marking
Delivery time : 1–5 days
PA
Color : Colored.
Types : PA6, PA66, PA6T, PA9T.
Surface finish :Mechanical grinding, acid/alkali etching, hydrolysis technology, coating.
Delivery time : 1-5 days.
PE
Color : black,white,colored.
Types : LDPE, HDPE, UHMWPE, PEX, PEX-A, PEX-B.
Surface finish :Polishing, sandblasting, coating, etching.
Delivery time : 1-5 days.
PEEK
PEEK is a high-strength, high-temperature engineering plastic with low friction and excellent chemical resistance. It is widely used in aerospace components, high-heat parts, and medical devices.
Color : Beige,black.
Types : CF-PEEK, GF-PEEK, PEEK with carbon black/ceramic/PTFE/graphite fillers.
Surface finish :Sandblasting, polishing, metal coating, polymer coating.
Delivery time : 1-5 days.
PP
PP is a semi-crystalline thermoplastic with good flow, requiring temperature control during CNC machining. It’s widely used for containers, connectors, and structural parts.
Color : black,white,colored.
Types : PP-H, PP-B, PP-R, HIPP.
Surface finish :Polishing, Sandblasting, Coating.
Delivery time : 1-5 days.
HDPE
Color : black,white.
Types : HI-HDPE, UV-HDPE, UHMWPE, Carbon Black-Filled HDPE.
Surface finish :Polishing, Sandblasting, Coating.
Delivery time : 1-5 days.
HIPS
HIPS is a rubber-modified thermoplastic with high impact resistance, easy processing, and low cost. It is widely used in housings, packaging, automotive interiors, and lightweight structural applications.
Color : black.
Types : Impact-resistant HIPS, Brominated flame-retardant HIPS, Glass-fiber reinforced HIPS.
Surface finish :Polishing ，Sandblasting ，Coating.
Delivery time : 1-5 days.
Surface finish for CNC machining parts
Over the past 14 years, we have selected and briefly outlined more than 10 surface finished for various precision machined parts.
Machined finish
The prototype processed by the machine tool retains traces of tool machining.
Anodizing
Polish
Sand blasting
Uses high-pressure abrasives to create a clean, rough, matte surface finish.
Brushed finish
Powder coating
Uses electrostatic and heat curing to form a dense layer, improving corrosion resistance on parts.
Electroplating finish
Deposits a metal layer to improve corrosion and wear resistance.
Black oxidize
Forms a low-cost, anti-reflective coating on metal surfaces via simple chemical oxidation.
CNC Machining Capabilities
Weldo provides CNC milling and turning for metal and plastic parts, with tolerances down to ±0.002 mm on selected features.
Standard Tolerance
Typically ±0.05 mm
Precision Tolerance
Down to ±0.002 mm For selected critical features
Minimum Wall Thickness
0.5 mm for metals
1.0 mm for plastics
CNC Milling Capacity
3000 × 1600 × 1000 mm
CNC Turning Capacity
Up to Ø200 × 1000 mm
Inspection Methods
CMM, height gauge, micrometer and profile projector
Quality Control for Precision CNC Parts
Dimensional and material inspections are performed throughout production to ensure every CNC-machined part meets drawing requirements.
Weldo cnc machining solutions
Whether your CNC precision machining project production quantity is 1 or dozens or hundreds of batches, Weldo’s processing team can flexibly schedule your project and deliver it on schedule.
Small-batch production
Lead time : 5-15 business days
Capability : 100-1000 units
Meet your precision machining requirements
Finally, full-scale production
Lead time : 2- 5 weeks
Capability : above 1000 units
Consistent quality and high cost performance
CNC Machining for Industry-Specific Parts
Weldo machines precision parts for aerospace, medical, automotive, mining, and consumer electronics applications.
Aerospace
Lightweight brackets, housings, and structural parts with tight datum control.
Medical Equipment
Instrument parts, fixtures, and housings with clean, precise finishes.
Automotive
Housings, mounts, shafts, and connectors for prototypes and production.
Mining Equipment
Wear-resistant bushings, shafts, couplings, and heavy-duty parts.
Consumer Electronics
Enclosures, heat sinks, frames, and precision internal parts.
Why You Can Trust Weldo Machining
Experienced engineering, documented quality control, and scalable production support help reduce sourcing risks from prototype to volume manufacturing.
ISO 9001:2015 Quality System
Documented inspection procedures support consistent dimensional and production quality.
14+ Years of Machining Experience
Custom metal and plastic parts have been manufactured since 2012.
Engineering and DFM Review
Drawings, materials, tolerances, and critical features are reviewed before production.
Prototype-to-Production Support
Machining and inspection plans support prototypes, small batches, and volume orders.
Get Your Quote
Do not hesitate,feel free to contact with us for more details and quote
CNC machining FAQ
What tolerances and surface finishes can CNC machining achieve?
Typical tolerances are around ±0.05 mm, while precision machining can reach ±0.01 mm or tighter with proper process control and inspection. Surface finish is commonly Ra 1.6–3.2 μm, and can be improved further through finishing passes or post-processing. Actual capability depends on material, geometry, fixturing, and measurement method.
What factors mainly affect CNC machining cost?
Cost is driven by material, machining time, part complexity (multi-side features, deep cavities, thin walls), fixturing and tooling needs, tool wear, tolerance and inspection requirements (such as CMM reports), surface treatments, and order quantity. Good DFM can often reduce both cost and lead time.
What should be considered when moving from prototyping to production?
Lock in material grade and condition, datums and CTQs, the machining route (rough/finish strategy and allowances), inspection standards and frequency, and revision/traceability requirements early. Validating assembly fit and process stability during prototyping helps reduce rework risk in production.
What information should I provide for an accurate quote?
Provide 2D drawings (tolerances/GD&T/surface requirements), a 3D model (STEP preferred), quantity and lead time, CTQ notes, and whether you need inspection documents (FAI, CMM, material certs). If the part involves welding, corrosive media, or temperature limits, include that in the RFQ.