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Surface finishing service

Over 20 different kinds of surface finishes for you.Make your part more corrosion resistant and aesthetical.
Home / All Sheet Metals

Precision machining meets personalization

We look forward to delivering high-quality products and professional services to meet your expectations and requirements.
NameToleranceApplicable materialApplicationAppearanceColor
Smooth MachiningSmooth MachiningMetalsremove burrClean and smooth without burrsNA
PolishingPolishingMetalsremove the veins of the metal surfacesmooth and shinyNA
BrushingBrushingMetalssurface defects are partially removeduniform bright striped surfaceNA
Shot BlastingShot BlastingMetalsremoves surface streaks and defectsmatt and roughNA
Powder CoatingPowder CoatingMetals、carbon fiberhide metal defectsmetal defects will be totally hidencustomizable
Spray PaintingSpray PaintingMetalspraying paint, pigment, or color to a solid surface as a colored protective layer/customizable
Black OxideBlack OxideSteel、Copper、magnesiumreduce the light reflection/black
PassivationPassivationaluminum、Copper、stainless steel、titaniumas the basic for paintingSmooth and uniform surfaceNA
ParkerisingParkerisingMetalspretreatment of painting to strengthen film adhesion/Grey or black
AnodizingAnodizingAluminum、Magnesium、Titaniumthe most widely used and most successful wear resistance surface finish technology of aluminum alloy/customizable
ElectroplatingElectroplatingMetalsimprove wear resistance, electrical conductivity, reflective property, corrosion resistance and aesthetics of the metal product/Depend on the material of layer
Electrophoresis DepositionElectrophoresis DepositionMetalsMore environmentally friendly than other coating technique/customizable
Baking finishBaking finishMetalsResistant to water, dust,grease and easy to clean/customizable
Thermal sprayingThermal sprayingMetalsAs protective or functional surface layer/Depend on the material of layer
Physical vapor depositionPhysical vapor depositionMetalsAs protective or functional surface layer/Depend on the material of layer
Antirust oil for electrostatic sprayingAntirust oil for electrostatic sprayingMetalsAntirust/NA
Cleaning servicesCleaning servicesMetalsRemove the carbonizing film and oil of the surface/NA

LML's portfolio of secondary operation

Secondary operation will improve aestheic or prevent injuries from sharp corner of the products.

Knurling

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

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Chamfering

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

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Grinding

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

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Heat Treatment

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

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welding

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

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riveting

After knurling, it can increase the sense of beauty of the part and make it easy to handle. It is often used for the outer surface processing of casing, hinge wrench and other parts

learn more

Cosmetic Finishes

Surface finishes can have either a functional or aesthetic intent. Finishes that cater to both aspects are classified as cosmetic finishes and are frequently employed for enhancing the appearance of different parts. The fabrication of these parts demands additional measures to minimize defects such as tool-induced marks and scratches.

Functional

There is no necessary to have aesthetic look.Machining veins will be seen

  • Smooth machining
  • Passivation
  • TYPE III andozied
  • Glossing
  • Brushing
  • Black oxide
  • Mechanical Polishing
  • Etching
  • Degreasing
  • Electroplating
  • Electrophoresis deposition

Matte

slogan:Removes surface streaks and defects, make surface matt and rough

  • Blasting
  • Acid pickling
  • Passivation
  • Parkerising

Functional

There is no necessary to have aesthetic look.Machining veins will be seen

  • Chemical or electrochemical polishing
  • Blasting+Anodizing
  • Glossing+Brushing
  • Glossing+Polish
  • Powder coating

Wide Array of Materials We Offer

Call on RapidDirect’s staff to recommend the right materials from our rich selection of metal and plastic materials with different colors, infill, and hardness. Every material we utilize comes from reputable suppliers and is thoroughly inspected to ensure they can be matched to various manufacturing styles, from plastic injection molding to sheet metal fabrication.

Competitive Prices

You are guaranteed 30% lower costs and competitive prices to help you settle your material and start your project.

Reliable supply chain

Apart from self-owned factory, we have thousands of suppliers to maintain a stable supply of materials.

Superior Quality

Each of our material bears certified material certification to guarantee excellent quality for your parts.

Professional Support

Creative engineers and technicians are happy to help and recommend the suitable material for you.

Introduction to the common process of cnc metal materials

We can generate instant machining quotes for 50+ metals and plastics.

Metal CNC services

LML provides the most advanced CNC metalworking services to ensure superior product quality and fast delivery. We have more than 60 metal milling machines and metal lathes that we can offer with the capacity and competitive prices. We accept small orders for CNC metal parts with a MOQ of 1 and can handle more complex CNC machining work, while we accept urgent orders. With LML, you can get the perfect products and thoughtful service you want, we are your friends in China.

Metal machining

Metal machining is the process of cutting down a raw piece of metal to create a desired shape or object. This process is done most accurately with a CNC (Computerized Numerical Control) machine, which can produce almost any three dimensional object designed via CAD (Computer Aided Design) software. Our network of machinists mainly uses 3- and 5- axis CNC machines for producing any metal parts that pass our online DFM checks. State-of-the-art metal CNC machines, like the ones we use, are able to cut complicated features on parts with great accuracy, while maintaining tight tolerances.

Metal CNC Milling

CNC milling removes materials from the workpiece to create custom-designed parts with flat surface using cutting tool or multi-point milling cutters.

WIth our 3-axis & 5-axis CNC milling services, you can get milled parts with tight tolerance up to 0.02mm (±0.0008 in.)

Metal CNC Turning

CNC turning shears materials from the ouside of a rod at incredible speeds using a spinning tool. At RapidDirect, we apply 50+ CNC lathes and CNC turning centers to create round or cylindrical turned parts with extreme precision that consistantly meet customers’ expectations.be higher.

Gallery of surface finishing part made by LML

The metal part can serve as functional or aesthetic purpose,and the way of usage will decide on the type of surface finish.

Defining an A and a B side

We can generate instant machining quotes for 50+ metals and plastics.

Surface finishing often leaves aesthetic defects on yourparts, such as hang marks for anodizing. Defining an Aand a B-side in your design will ensure that the most important areas of your part remain free of defects

In this image you can see how you can define an A-side and a B-side in your technical drawina:

A side: Indicates the most aesthetically importantsurface, typically the visible side of your product.

B side: Indicates the side that is not aesthetically important, typically the side hidden from visibility after assembly

For the primary surface (A-side) of your part, we guaranteedefect-free production. In contrast, secondary surfaces (B-side)may be machined with hanging marks and other minor defects. Bside surfaces, like the rest of your part, will be free of scratches.stains and blemishes.

Manufacturing vetted network of our service

We look forward to delivering high-quality products and professional services to meet your expectations and requirements.

Consistency requirements

Each part must be visually consistent across the same batch.meaning:

  • Same grit must be used across parts for sanding orbrushing
  • Brush marks must be in the same direction*
  • Color must be consistent to the same pantone when parts are placed next to each other
  • Gloss units must be consistent across the batch

* Manual brushing marks will be as unidirectional aspossible. Please note that for rounded geometries, brushingmarks may not be entirely unidirectional.*

Visual inspection conditions

The surface quality of every part must meet the followingconditions:

  • Distance: 50cm +10cm (19,7 in + 3,9 in) with a 10/10 vision(or corrected)
  • Incidence angle: Approximately 45 in all directions
  • Lighting conditions: 500-1000 Lux, color 3300-5300 Kelvin(neutral white)

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The metal part can serve as functional or aesthetic purpose,and the way of usage will decide on the type of surface finish.

FAQs

LML takes the stress out of manufacturing by guaranteeing the quality and consistency of every part. Each order is dimensionally and visually inspected by our in-house quality control team to make sure it meets the LML Standard. If you’re not satisfied with your order, we’ll remake your parts as fast as possible, free of charge, or refund you - whichever you prefer.
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    "5-Axis" generally refers to the ability of a CNC machine to move the tool in five directions, which belongs to a high precision production technology.
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    GALLERY OF CNC MACHINED PARTS
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    Cold Heading & Stamping Workshop

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