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CNC Machining

CAPABILITIES

Quality CNC Machining Services

We provide rapid machining, small-batch machining, and high-volume production, with Long Shen managing every step of the process. Simply upload your CAD file to receive pricing, lead times, and design-for-manufacturability feedback for your custom CNC parts. Our advanced CNC machining services cater to both metals and plastics, offering flexible production and shipping options to suit your budget and development needs.

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  • ISO 9001 certified, AS 9100 /ISO 13485 Compliant
  • 45+ Certified Materials, 13+ Finishing Options
  • NADCAP, and NABL approved manufacturing partners.
  • Hand Metrology, Laser & CMM Inspections
  • Hardware Installation & Mechanical Assembly

Our CNC Machining Process

Multi Jet Fusion (MJF)

Accelerate time to market with production-grade 3D printing.

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Fused Deposition Modeling (FDM)

Low cost process for early state prototypes.

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Digital Light Synthesis (DLS)

Production speed and repeatability for end-use

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Post Processing

Finishing Options for CNC Machining

NameApplicable MaterialsColorsCan Be Applied with
AlodineAluminumClear, goldMedia Blasting, Tumbling, Type II Anodizing* Type III Anodizing with PTFE*
AnodizingAluminumClear, black, grey, red, blue, goldMedia Blasting, Tumbling, Alodine*
Black OxideSteel, Stainless SteelBlackMedia Blasting, Tumbling, Passivation
Electroless Nickel PlatingAluminum, Steel, Stainless Steel—Media Blasting, Tumbling
ElectropolishingSteel, Stainless Steel——
Hand PolishingAcrylic—Enhanced Cosmetic Appearance
Media BlastingAluminum, Steel, Stainless Steel, Brass, Bronze, Copper—All post processes, except Electropolish and Powder Coat
Nickel PlatingAluminum, Steel, Stainless Steel—Media Blasting, Tumbling
PassivationSteel, Stainless Steel—Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting
Powder CoatingAluminum, Steel, Stainless SteelBlack (20% or 90% gloss), White (20% or 90% gloss)—
TumblingAluminum, Steel, Stainless Steel, Brass, Bronze, Copper—All post processes, except Electropolish and Powder Coat
Vapor PolishingCNC Polycarbonate (Clear, Black)—Enhanced Cosmetic Appearance, Near Optically Clear Applications
Zinc PlatingSteel, Stainless SteelClear (light blue coating). Black (glossy black coating).Media Blasting, Tumbling, Passivation

Materials we use for CNC Machining

A2 Tool Steel

A2 Tool Steel has excellent wear resistance and toughness, commonly used to make fixtures, tools, tool holders, gauges, and punches.

Mill Lead Time:
As fast as 7 days
Finishing Options:
Media Blasting, Vibratory Tumbling, Black Oxide, Powdercoating

ABS (Acrylonitrile Butadiene Styrene) is an affordable thermoplastic that has become popular for pre-injection molding prototypes. It is a versatile material known for its strength, durability, and resistance to impact and heat. ABS plastic is widely used in the automotive and consumer electronics industries due to its excellent mechanical properties and ease of processing. Additionally, it can be easily modified with other additives to enhance specific properties such as flame retardancy or UV resistance.

Mill Lead Time:
As fast as 3 days
Colors:
Black, neutral matte finish

Acrylic is a durable plastic material that is resistant to scratches, making it an ideal choice for various applications such as tanks, panels, and optical displays. It is also lightweight and shatter-resistant, which makes it a popular alternative to glass. Acrylic is known for its clarity and transparency, making it a great option for applications where optical performance is important. Additionally, it can be easily fabricated into different shapes and sizes, allowing for a wide range of design possibilities.

Mill Lead Time:
As fast as 3 days
Colors:
Optically clear, opaque

Aluminum is a lightweight and highly versatile material that is widely used in various industries. It offers a unique combination of properties including high strength-to-weight ratio, excellent corrosion resistance, malleability, and good thermal and electrical conductivity. These characteristics make aluminum an ideal choice for applications where weight reduction, durability, and efficient heat transfer are important factors, like engine blocks, heat exchangers, and other transportation components.

Mill Lead Time: As fast as 3 days
Alloys: 6061-T6, 7075-T6, 7050, 2024, 5052, 6063, MIC6
Finishing Options:
Alodine, Anodizing Types II, III, III + PTFE, ENP, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing.

360 Brass (free-machining brass) is a versatile material for various industries. Common applications include gears, lock components, pipe fittings, and decorative parts. It has excellent machinability and can be easily fabricated into different shapes and sizes. It boasts high corrosion resistance and good electrical conductivity, making it an ideal choice for electrical components and marine applications.

Mill Lead Time:
As fast as 5 days
Finishing  Options:
Media blasting

932 Bearing Bronze is a reliable and robust, providing excellent wear and corrosion resistance due to its tin, iron, and zinc content. It’s a great choice for applications requiring good wear and corrosion resistance. This alloy is commonly used in applications that require high strength, low friction, and resistance to wear and tear. Because of its strength and durability, it is an ideal choice for bearings, bushings, thrust washers, valve components, and other parts subjected to heavy loads or harsh environments.

Mill Lead Time:
As fast as 5 days
Finish Options:
Available as-machined, media blasted, or hand-polished

Cast Iron is a material known for its durability and wear resistance, making it an excellent choice for absorbing vibrations. It is commonly used in various industrial applications such as gears, bases, pulleys, and bushings. Due to its ability to withstand high levels of stress and pressure, cast iron is often preferred over other materials in heavy-duty machinery and equipment. Its unique properties make it a reliable option for industries that require stable and long-lasting components.

Mill Lead Time:
As fast as 7 days
Finish Options:
Media blasting, Tumbling

Copper

Copper 101 and 110 have unmatched thermal and electrical conductivity, which makes them a popular choice for bus bars, wire connectors, and other electrical applications like parts for power transmission and distribution systems. Copper alloys 101 and 110 also offer incredible durability, corrosion resistance, and ease of fabrication. Commonly used in high-performance electrical components such as transformers, generators, motors, and switchgear.

Mill Lead Time:
As fast as 3 days
Finishing Options:
Available as-machined, media blasted, or hand-polished
 
Alloys:
101, 110

Delrin

Delrin (acetal) is a plastic with low friction and high stiffness. Delrin has exceptional dimensional accuracy, making it an ideal choice for applications where precision is critical. It also has relatively high toughness which makes it resistant to impact and wear. Delrin’s minimal elongation means it can maintain its shape under stress without significant deformation. Delrin is commonly used in a variety of industries such as automotive, aerospace, and consumer goods.

Mill Lead Time:
As fast as 3 days
Colors:
White, black, brown
 
Grades:
150, AF (13% PTFE Filled), 30% Glass Filled

Garolite G-10

Garolite G-10 is a high-pressure laminate material composed of layers of woven fiberglass cloth impregnated with epoxy resin. It is a strong and rigid material that exhibits excellent electrical insulation properties, along with water resistance. Garolite G-10 is known for its high mechanical strength and dimensional stability. It is commonly used in insulating components, circuit boards, and other electrical components. G-10 is a composite material with a low coefficient of thermal expansion.

Mill Lead Time:
As fast as 7 days
Colors:
Green, yellow

HDPE

High-density polyethylene (HDPE) is a versatile thermoplastic known for its durability, chemical resistance, impact resistance, structural integrity, and low moisture absorption. It is commonly used in packaging, construction, and automotive manufacturing industries. Other applications include plugs and seals. It is also an excellent electrical insulator.

Mill Lead Time:
As fast as 3 days
Colors:
White, black

Invar

Invar is a Ni-Fe alloy with high dimensional accuracy and excellent thermal dimensional stability. It is commonly used in industries such as aerospace, electronics, and precision engineering. Common applications include precision instruments and devices where temperature-dimensional changes are undesirable. It is ideal for components such as clock pendulums, bi-metallic strips, and measuring instruments. In the aerospace industry, Invar is used in satellite structures, antennas, and optical systems.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 7 days
Finishing Options:
Vibratory Tumbling, Media Blasting, Powdercoating
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Kovar

Kovar is a Ni-Fe-Co alloy known for its excellent thermal expansion properties and dimensional stability. It is commonly used for electronics, telecommunications, and aerospace components, such as hermetic seals for devices like vacuum tubes and transistors, telecommunications equipment, and turbine blades. Its ability to nearly match the coefficient of thermal expansion of glass enables airtight sealing, preventing moisture or contaminants from damaging sensitive electronic components.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 7 days
Finishing Options:
Vibratory Tumbling, Media Blasting, Powdercoating
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Magnesium

Magnesium has an excellent strength-to-weight ratio. It is widely used in industries such as automotive, aerospace, and electronics. Common applications include lightweight components that help improve fuel efficiency and reduce emissions, aircraft structures and components, engine blocks, transmission cases, and wheels. The high strength allows weight savings without losing performance or safety. Its low density makes it highly desirable for reducing weight in airplanes and spacecraft.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 10 days
Finishing Options:
Vibratory Tumbling, Media Blasting, Powder Coating
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Nylon

Nylon is thermoplastic with high strength, wear resistance, excellent sound/vibration dampening, and low friction coefficient. It is commonly used in engineering and manufacturing processes. Common applications include gears, bearings, and bushings. Two of the most notable use cases for Nylon are in medical devices and electronics insulation, notably screws and spacers for panel mounted circuit boards.

Mill Lead Time:
As fast as 3 days

PEEK

PEEK, (polyether ether ketone) is a thermoplastic widely used in industries such as aerospace, automotive, and electronics. PEEK has high strength, stiffness, toughness, chemical, biocompatibility, and thermal resistance. Due to its , PEEK is also suitable for use in harsh environments where other materials may fail. Common applications include aircraft structures, electronic components that require high temperature resistance, and medical and dental components (including implantables).

Mill Lead Time:
As fast as 3 days
Colors:
Opaque beige
 
Grades:
Standard PEEK, 30% Glass Filled

Polycarbonate

Polycarbonate is a durable and transparent thermoplastic with good electrical insulation, heat resistance, impact resistance, clarity, flame retardancy, and scratch resistance. Common applications include safety glasses, protective shields, electrical enclosures, connectors, and insulators. It is one of the most commonly utilized plastics in manufacturing.

Mill Lead Time:
As fast as 3 days
Colors:
Clear, black and glossy

Polypropylene

Polypropylene (PP) is a thermoplastic that has a high melting point, high strength-to-weight ratio, and excellent chemical resistance, durability, reliability, moisture resistance, and fatigue strength. Common applications include laboratory equipment, medical devices, food processing equipment, consumer goods, aircraft interior components, ducting, housings, automotive bumpers, fuel tanks, and battery cases.

Mill Lead Time:
As fast as 3 days
Colors:
White (semi-clear or opaque)

PPS

Polyphenylene Sulfide (PPS) is a thermoplastic with exceptional chemical resistance, thermal stability, high-temperature resistance, chemical resistance, dimensional stability, and electrical insulation. Common applications include automotive components, electrical connectors, and industrial equipment, such as fuel systems, turbine blades, brake pads, bearings, gears, switches, and engine components. PPS parts remain durable and reliable even in harsh environments.

Mill Lead Time:
As fast as 7 days
Colors:
Natural (off-white)

PTFE

PTFE (Teflon™, polytetrafluoroethylene) has low friction nonstick properties, excellent chemical resistance, high temperature resistance, and electrical insulating properties. It is commonly utilized in low-friction applications such as bearings, seals, gaskets, bearing, and washers. It is also good for parts that require insulating properties.

Mill Lead Time:
As fast as 3 days
Colors:
Black, white (opaque)

PVC

PVC (Polyvinyl chloride) is a plastic with high durability and versatility, excellent chemical and UV and corrosion resistance. Common applications include pipes, fittings, electrical enclosures, tubing, automotive interior, and commercial building components. It is cost-effective and lightweight, with a long lifespan.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 5 days
Finishing Options:
Available as-machined
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Stainless Steel

Stainless Steel is a popular and highly versatile material known for its exceptional strength, and durability, along with high temperature, and corrosion resistance. It is widely used in industries such as construction, automotive, aerospace, and manufacturing, with applications ranging from heat exchangers, industrial ovens, exhaust systems, construction equipment, heavy machinery, engine components, fasteners, turbine blades, tanks, pumps, valves, orthopedic implants, and medical equipment.

Mill Lead Time:
As fast as 7 days
Finishing Options:
Black Oxide, Electropolishing, ENP, Media Blasting, Nickel Plating, Passivation, Powder Coating, Tumble Polishing, Zinc Plating, Vibratory Tumbling
 
Alloys:
303, 304L, 316L, 410, 416, 440C, 17-4PH, Nitronic 60

Steel

Fictiv offers a wide range of steel options to meet the demands of various applications. Alloy and carbon steel are particularly useful for creating fixtures, mounting plates, draft shafts, axles, torsion bars, gears, bolts, studs, shafts, and structural components. High-quality steel materials provide excellent strength and durability, making them ideal for demanding industrial applications.

Mill Lead Time:
As fast as 7 days
Alloys:
4140, 4130, A514, 4340
Carbon Steel Types:
1018 Low Carbon, 1045 Carbon, Zinc-Galvanized Low-Carbon
Finishing Options:
Black Oxide, ENP, Electropolishing, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing, Zinc Plating, Vibratory Tumbling

Titanium

Titanium is lightweight, strong, biocompatible, and highly resistant to corrosion. It has a high strength-to-weight ratio and excellent temperature resistance. It is commonly used in industries such as aerospace and medical devices. It’s also used for parts like engine components, landing gear, structural elements, medical implants, and prosthetics. Other common use cases include aerospace fasteners, turbine blades, sports equipment, and marine applications.

Mill Lead Time:
As fast as 7 days
Finishing options:
Media Blasting, Vibratory Tumbling, Passivation, Powdercoating
 
Grade:
Titanium Grade 5

Torlon

Torlon is a thermoplastic with exceptional mechanical strength, heat resistance, and chemical resistance and reliable performance under extreme conditions. It’s an ideal choice for applications in industries such as aerospace, automotive, and oil and gas. Additionally, Torlon has excellent chemical resistance, making it suitable for use in harsh environments where exposure to chemicals and solvents is common.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 7 days
Finishing Options:
Available as-machined
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

UHMW

Ultra-High-Molecular-Weight Polyethylene (UHMW) has high abrasion resistance, great durability, excellent wear resistance, low friction coefficient, and excellent impact strength. UHMW is also lightweight, self-lubricating, and has good chemical resistance. Common applications include gears, bearings, liners, conveyors, food processing, agriculture, and automotive components. Another advantage of UHMW is its ability to absorb shock.

Mill Lead Time:
As fast as 3 days
Colors:
White, black

Ultem

ULTEM is a thermoplastic with exceptional strength, stiffness, durability, environmental resistance, heat resistance, low flammability, and excellent electrical insulation capabilities. Common applications include electronic components/connectors, industrial equipment, surgical instruments, aerospace engine components, and medical devices. In addition to its mechanical properties, ULTEM exhibits excellent chemical resistance, making it suitable for corrosive environments.

Mill Lead Time:
As fast as 7 days
Colors:
Naturally translucent amber color, frosted when machined

Zinc

Zinc is a versatile metal with excellent heat resistance, durability, strength, electrical conductivity, thermal conductivity, machinability, and corrosion resistance. Common applications include automotive parts such as gears, bushings, and bearings. Additional applications include door and window hardware, locks, and hinges, as well as electrical connectors and switches. It is also ideal for applications involving moisture exposure or other harsh environments.

Processes:
CNC Mill
CNC Lathe
Mill Lead Time:
As fast as 7 days
Finishing Options:
Vibratory Tumbling, Media Blasting, Powder Coating
Tolerance:
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium

Precision Machining Tolerance

Metals, PEEK, And ULTEM with DrawingOther Plastics
with Drawing		No Drawing
Linear Dimension+/- 0.01 mm

+/- 0.0003 inch		+/- 0.05 mm

+/- 0.002 inch		ISO 2768 Medium
Hole Diameters
(Not Reamed)		+/- 0.008 mm

+/- 0.0003 inch		+/- 0.05 mm

+/- 0.002 inch		ISO 2768 Medium
Shaft Diameters+/- 0.004 mm

+/- 0.00016 inch		+/- 0.05 mm

+/- 0.002 inch		ISO 2768 Medium

CNC Machining FAQs

At Long Shen, we offer various lead times to fit your budget and project schedule, delivering CNC parts in as little as three days.
Our CNC machines can achieve precision tolerances as tight as +/- 0.0002 inches.
We offer instant quotes for a range of materials, which you can view here. If you don't see the material you need, you can request a custom material through our RFQ process.
At Long Shen, fast delivery is our norm. We provide different lead times and pricing to meet your needs. For urgent delivery requests, please contact your sales representative to see if we can expedite your order.
Yes, Long Shen excels at handling complex geometries and 2D drawings. Our platform supports 2D drawing uploads, generates 2D drawings, and our quoting engine analyzes the drawings for configuration details and special requirements.

HEADQUARTERS

Hong Kong

RM 2902, 29/F
Ho King Commercial Centre
2-16 Fa Yuen Street
Hong Kong

NORTH AMERICA

Montreal, Canada

1275 Av. des Canadiens-de-Montréal,
Montreal, Quebec, Canada
H3B 0G4

FACTORIES

CHINA

Xiegang County,
Dongguan, Guangdong
China

Panyu District,
Guangzhou, Guangdong
China

DWK Industrial Park,
Taian, Shandong
China

contact (at) longshengoods.com

+1 866-807-0431

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