Welcome: PengYu Precision Industry Co.,LTD.

CNC Turning Service

China high-quality precision CNC turning services you can trust. Competitive pricing and fast lead times.

Over 50 Certified Materials
±0.005mm Tight Tolerance
Custom Finishes
Lead times from 7 days

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Expert CNC Turning Services From China


Are you looking for a reliable, quick-turn supplier of CNC-turned parts? 


PY-precision is a leading manufacturer of CNC-turned parts delivering excellent quality flexibly. Our highly skilled engineers, designers, and procurement teams ensure our services are provided on time and within budget. Our state-of-the-art CNC turning centers & lathes, combined with various finishing options, make us the perfect choice for your precision manufacturing requirements, from prototyping to production runs. 

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Why Order CNC Turned Parts From Us


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Rapid Turnaround

We’re committed to reducing friction at every stage, so you can be as delighted with the speed of your CNC Turned parts’ arrival as you are with their exceptional quality. Order now to receive your parts in as little as 5 days!

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A Wide Variety Of Materials

We offer over 60 production-grade materials including metal, plastic, and ceramic, and take great care to ensure the right material is used for every part.

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High Accuracy

Our standard CNC tolerance is +/- 0.127mm, and when you use our tolerance configurator, you can expect precision machining to be +/- 0.005mm.

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Perfect Finish

We offer high-quality finishing processes for most CNC Turned parts; including anodizing, polishing and plating, heat treatment, powder coating, and more.


Our Maximum capabilities for CNC turning


Part size limitationsMetric units
Imperial units
Maximum part diameter508 mm20 inch
Maximum part length1066.8 mm42 inch
Maximum swing over the carriage355.6 mm14 inch
Maximum spindle through-hole50.8 mm2 inch




CNC Turning General Tolearances


From intricate medical and aerospace designs to complex industrial parts, our ISO 9001-certified company creates precision components with the highest level of accuracy.

 We utilize CNC turning lathes for complex machining projects requiring tight tolerance specifications up to ±0.005” – as close as a few thousandths of an inch! 

Our standards for metals follow ISO 2768-m while plastics adhere to requirements set by ISO 2768-c. 


                                                                                   Type
                                                               Tolerance
Linear Dimension

+/- 0.025 mm

+/- 0.001 inch

Hole Diameters (not reamed)

+/- 0.025 mm

+/- 0.001 inch

Shaft Diameters

+/- 0.025 mm

+/- 0.001 inch

Part Size Limit

950 * 550 * 480 mm

37.0 * 21.5 * 18.5 inch


CNC Turning Design Guidelines

Our CNC machining experts have carefully compiled the ideal characteristics for creating precision components. 

This table shows what works best, and also presents any technical limits to keep in mind during production.



Feature
Recommended SizeFeasible size
Min. Feature SizeØ 2.5 mmØ 0.5 mm
Internal EdgesR 8 mmR 0.25 mm
Minimum Wall Thickness

0.8 mm (for metals)

1.5 mm (for plastics)

0.5 mm (for metals)

1.0 mm (for plastics)

Holes

Diameter:standard drill bit sizes

Depth: 4 x diameter

Diameter: Ø 0.5 mm

Depth: 10 x diameter

Threads

Size: M6 or larger

Length: 3 x diameter

Size: M2



Materials For CNC Machining Parts

We offers a wide variety of materials for custom CNC machining,  plastic, and metal, including but not limited to:


MaterilPhotoAlloysFinishing Options:
Aluminum21.png6061-T6, 7075-T6, 2024, 5052, 6060, 5083, 2017, 6082 Alodine,  Anodizing Types II, III, III + PTFE, ENP, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing
Stainless Steel22.pngSS303, Stainless Steel 304/304L, Stainless Steel 316/316L, Stainless Steel 17-4, Stainless Steel 416, etc.As machined, Bead Blasted, Polishing, Decorative Chrome Plating, Powder Coat, Nickel Plating, Gold Plating, Silver Plating
Alloy Steel23.pngAISI 1215, AISI 4140, AISI 4340, AISI 8620, AISI 4130Polishing, Plating, Painting, Powder Coating and etc.
Tool Steel24.pngA2 Tool Steel, D2 Tool Steel, O1 Tool Steel, S7 Tool Steel, M2 Tool SteelBead/Sand Blast, Polishing, Plating, Painting, Powder Coating, Heat Treatment and etc.
Brass25.pngC360, C260 Nickel Plating, Bead Blasted, Gold Plating, Silver Plating
Copper1.pngC10100, C11000, C12200, C14500, C17200 Plating, Polishing
Titanium27.pngTi-6Al-4V, Ti-6Al-2Sn-4Zr-2Mo, Ti-3Al-2.5VPolishing, Anodizing, Sandblasting, Chemical etching, Laser engraving and etc


CNC Plastics


Material
PhotoColor
Grade
POM (Delrin/Acetal)12.pngWhite, black, brownPOM-C, POM-H, UV stabilized POM, Food-Grade POM
PMMA (Acrylic)13.pngTransparencyExtruded PMMA, Cast PMMA, Impact-Modified PMMA, UV-Stabilized PMMA, Heat-Resistant PMMA
PEEK14.pngBeige with no transparencyUnfilled PEEK, 30% glass-fiber reinforced PEEK, 30% carbon-fiber-reinforced PEEK, Bearing Grade PEEK
ABS15.pngABS is naturally opaque and comes in a range of colors including black, white, and grayGeneral purpose ABS, Flame retardant ABS, High impact ABS, Heat-resistant ABS
Nylon (PA)16.pngNylon is often used in its natural off-white or slightly yellowish colorNylon 6, Nylon 6/6, Nylon 11, Nylon 12
PTFE (Teflon)19.pngThe color of PTFE is typically white or off-white
PVC17.pngclear or opaqueUPVC, PPVC, CPVC
PEI (Ultem)18.pngAmber or brownish colorUnfilled PEI, Glass-Filled PEI, Carbon-Filled PEI, Ultem PEI


Surface Finishes for CNC Machined Parts


We offers a wide selection of surface finishes to improve the surface qualities of CNC-turned parts. 

The surface finishes applied after machining can change the appearance, surface roughness, hardness, and chemical resistance of the produced parts.




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As machined (Ra 3.2μm / Ra 126μin)

This finishing option with the shortest turnaround time. Parts have visible tool marks and potentially sharp edges and burrs, which can be removed upon request

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Smooth machining (Ra 1.6μm / Ra 63μin)

Smooth machining is similar to a ‘As machined’ finish, but with less visible machine marks. Parts are machined at a lower feed rate, with no hand polishing.

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Polishing (Ra 0.8μm / Ra 32μin or better)

Polishing is the process of creating a smooth and shiny surface by rubbing it or by applying a chemical treatment.

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Bead Blasting

Machined parts are bead blasted with glass beads which results in a uniform grainy texture and reduced machining marks.




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Tumbled

It is a process that tumbles vibrating media on machined parts to remove sharp edges and burrs.

Tumbling can be used to remove machine marks from exterior surfaces

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Bead blasted + Anodizing type II

The parts are bead blasted to #120 grit before being anodized type II—ideal for increasing the aluminum part’s corrosion resistance and cosmetic effects. 


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Bead blasted + Anodized type III (Hardcoat)

The parts are bead blasted to #120 grit before being anodized type III. Type III (Hard Coat) is thicker and adds a wear-resistant layer to Type II’s corrosion resistance, suitable for functional applications.

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Black Oxide

Black oxide is a conversion coating that is used on steels to improve corrosion resistance and minimize light reflection.


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Powder Coated

This is a finish of applying powdered paint to the components and then baking it in an oven, which results in a stronger, more wear- and corrosion-resistant layer that is more durable than traditional painting methods. 

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Chromate Conversion Coating

Chromate conversion coating is used to improve the corrosion resistance of aluminum and aluminum alloys while keeping their conductive properties. It is also applied as a base layer prior to priming and painting parts

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Plating

Include Nickel Plating, Silver Plating, Gold Plating, Zinc Plating, Chrome Plating, Tin Plating and etc, it is ideal to reduce corrosion, improve the appearance and function of solderability and electrical conductivity.

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DLC (Diamond-Like Carbon) Coating

DLC (Diamond-Like Carbon) coating is a hard, wear-resistant coating made of a carbon-rich material that exhibits some of the properties of diamonds

Other surface finishes are also available. Learn more about our metal and plastic surface finishing capabilities here.


Gallery Of CNC Turning And Lathe Parts


We machine rapid prototypes and low & large-volume production orders for customers in multiple industries: 

medical devices, aerospace, automotive, defense, electronics, hardware startups, industrial automation, machinery, marine and robotics, and many more.




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Brass swiss screw maching service 

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SS304 SWISS LATHE MACHINED

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AISI303 SWISS PRECISE PARTS AS MACHINED

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AL5083 SWISS CNC MACHINED SMALL PARTS





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