precision cnc machining service, custom machined components parts

What is our online precision CNC machining parts service?

VMT has 300 machine tools, the online precision cnc machining service provided has greatly shortened the production cycle and reduced the cost of parts, and quickly produced a large number of high-precision cnc turning and milling parts. We have a large number of customized processing partners, and have passed SGS on-site inspection, ISO9001: 2015 certification, IATF16949.VMT can use more than 40 metal materials to process parts, and detect the surface finish of the product and perform different surface treatments. Come and contact us for free samples and design analysis solutions and quotations.

Free project review

How do we start precision CNC machining parts service？

Our concept is to make the best custom CNC machining parts from the beginning!

Free evaluation of precision CNC machining

Propose your idea or 3D or CAD files, and we will start your project for free evaluation immediately. Our goal is to complete the quality and cost-effective plan for your parts within 30 minutes.
DFM analysis
Before custom machined components parts starting production, we will execute DFM analysis and develop a process control plan for all quality risk points. Our engineers will program based on DFM risk points, and then arrange tools and cutter to ensure the consistency of part quality.
Quality control

During the precision machined parts production process, our QC engineers will conduct patrol inspections based on the engineering drawings, and follow certain test methods and frequencies to ensure that the quality meets the requirements of the drawings (appearance, dimensions, tolerances).

The working principle of CNC machines

		Generally, the machine tool can be controlled according to numerical sequence commands to realize the automatic start and stop of the spindle, reverse rotation and speed change.
		It can automatically control the feed speed, direction and precision cnc machining route.
		It can select the tool and adjust the amount of cutting tool and the walking path according to the tool size, and can complete various auxiliary actions required in processing.
		The structure of CNC precision machining parts CNC lathe is also composed of headstock, tool post, feed transmission system and bed.
		The hydraulic system, cooling system, lubrication system and other parts are just the essential difference in structure between the feed system of the CNC lathe and the feed system of the horizontal lathe.

The classification and advantages-disadvantages of CNC machines, not all precision CNC machining parts are suitable for one type of CNC machine.

Machine type	Advantages and disadvantages	Applicable machining materials	Applicable to industry product representatives
3-axis drilling and tapping cnc milling	Because it is a linear track, the stroke speed is fast. If the tool change is a servo motor, the tool change time is fast.	Aluminum ,Copper	Mobile phone shell, electronic product shell, radiator
3-axis machining center	Because this is Hard track, it travels slowly and has a strong rigidity.	Stainless steel,Iron,Titanium alloy	Mould,Tools
3+2 cnc milling	The 4th axis is installed on the online track machine, which can process various 3-sided parts.	Aluminum ,Copper	Electronic cigarette parts, flashlight housing shell parts
High-speed multi-head cnc milling	It can be processed with multiple cutter heads simultaneously, and it is efficient and fast for precision cnc machining parts with a small amount of processing	Aluminum, copper, stainless steel	Electronic cigarette parts, Hand ornaments parts
5-axis CNC milling	For curved custom machined components parts, the processing speed is slow and the cost is high.	Aluminum. Copper, Stainless Steel,Iron	Engine impeller, difficult precision cnc machining parts

How to choose materials and compare with national standards of various countries, so as to find precision cnc machining parts suppliers, or to facilitate communication during design?

We have prepared 40 kinds of material inventory to ensure that customers' prototypes and small batch precision machining parts production are completed within 24 hours.Some of our materials are approved by IMDS.

Material properties	Material model	American Standard (ASTM)	German standard (DIN)	Japanese Standard (JIS)	Chinese Standard (GB)	British Standard（BS）
Aluminum	Aluminum6061	6061	AlMglSiCu	A6061	LD30	H20
	Aluminum7075	7075	AlZnMgCu1.5	A7075	LC9	L95
	Aluminum2014	2014	AlCuSiMg	A2014	LD10	2014
	Aluminum2024	2024	AlCuMg2	A2024	LY12	GB-24S
	Aluminum5052	5052	AlMglSi0.5	A5052	LD31	H19
	Aluminum6063	6063	ALMg2.5	A6063	LF2	NS4
	Aluminum1060	1060	-	A1060	L2	-
	Aluminum1070	1070	A199.7	A1070	L1	-
	Aluminum1080	1080	A199.8	A1080	LG1	1A
Stainless steel	Stainless steel 304L	304L	X2CrNi19-11	SUS304L	022Cr19Ni10	403S17
	Stainless steel 316L	316L	X7Cr14	SUS316L	022Cr17Ni12Mo2	416S21
	Stainless steel 301	301	X5CrNi17-7	SUS301	12Cr17Ni7	-
	Stainless steel 304	304	X5CrNi18-10	SUS304	06Cr19Ni10	-
	tainless steel 430	430	X6Cr17	SUS430	10Cr17	-
Brass	CuZn38Pb2	C37700	CuZn39Pb2	C3771	HPb59-1	CW612N
	CuZn39Pb3	C38500	CuZn39Pb3	C3603	HPb58	CW614N
	CuZn36Pb3	C38600	CuZn36Pb3	C3601	HPb63	CW603N
Copper		C10200	OF-Cu	C1020	T1	C101
Copper		C11000	SE-Cu	C1100	T1	C101
steel	Mild steel 1015	1015	C15	S15C	15	095M15
	Mild steel 1045	1045	C45	S45C	45	080M46
	Mild steel 1020	1020	C22	S20C	20	050A20
Titanium	Titanium Grade 1	GR1	-	TP270	TA1	-
	Titanium Grade 2	GR2	-	TP340	TA2	-
	Titanium Grade 4	GR4	-	TP550	TA4	-
Plastic	PTFE	PTFE	PTFE	PTFE	PTFE	PTFE
	PEEK	PEEK	PEEK	PEEK	PEEK	PEEK
	NYLON	NYLON	NYLON	NYLON	NYLON	NYLON

How does precision CNC Machining VMT guarantee surface machining accuracy requirements in production?

During the production process, we will implement the stricter standards than ISO Tolerances DIN ISO 2768-1 for the unrequired parts, and the CNC machining standard tolerances of our machines.

Nominal linear range tolerance (mm)	Linear dimensions DIN ISO 2768-F	Our metal parts	Our plastic parts
0.5 up to 3	±.0.05	±.0.02	±0.05
over 3 up to 6	±.0.05	±.0.03	±0.05
over 6 up to 30	±0.1	±0.05	±0.1
over 30 up to 120	±0.15	±0.05	±0.15
over 120 up to 400	±0.2	±0.1	±0.2
Nominal angle range tolerance (mm)	Linear dimensions DIN ISO 2768-F	Our metal parts	Our plastic parts
≦10	±1°	±1°	±1°
10~50	±0°30′	±0°30′	±0°30′
50~120	±0°20	±0°20	±0°20
120~400	±0°10	±0°10	±0°10

How do we make every precision CNC machined part have a consistent quality during the production process?

We have also reserved 40 kinds of material inventory to ensure that customers' hand molds and small batch custom machining parts production are completed within 24 hours Some of the materials we use for custom CNC machining parts are approved by IMDS.

Claim	Quality record
DFM identifies key dimensions	DFM report
Reduce customer drawing tolerances and issue in-plant engineering	Drawings
Identify key size	Procedur esheet
First article inspection before delivery	First record
Line inspection during production	Inspectio record
Process CPK control	SPC report
Sampling inspection of products in process	Shipmentin spection record
Shipment inspection	Full size report
Reliability test	Material proof
Environmental protection requirements guarantee	ROHS report

VMT provides a variety of surface treatment methods for precision CNC machining parts to choose, all appearances are implemented according to Apple appearance standards.

Part material	Surface treatment method	Principle details	Function and standard
Aluminum	Clean Anodized	Anodizing can enhance the wear and corrosion resistance of the surface of the precision CNC machining part, and increase the surface hardness.	Hardness can reach 5UM-60UM
	Color Anodized	Rich colors increase brand value	According to customer requirements, multi-color effects can be produced
	Powder Coating	Perform color matching according to Pantone and labor color card ral9016.	High temperature resistance, wear resistance and additional force
	Bead blasted	Guarantee the statistical precision CNC machining parts surface effect,Can be implemented in accordance with Apple's surface grade requirements.	According to SSPC—SP7 level execution
	Brushing	Use the surface to maintain uniform rules and beautiful lines.	Can reach between Ra1.2UM-Ra40UM
	Polishing	Use a grinding wheel or cloth wheel and wax to remove to maintain the surface finish.	Can reach between Ra1.2UM-Ra40UM
Stainless steel	Polishing	Use a grinding wheel or cloth wheel and wax to remove to maintain the surface finish.	Can reach between Ra0.6UM-Ra1.6UM
	Passivating Sandblasting	The effect of passivated fine sand, the surface has corrosion resistance.	According to SSPC—SP7 level execution
	PVD	CrN. TiN. TiAlCN. TiCN. TiAlN, etc. are plated on the surface to make the surface clear and beautiful.	Abrasion resistance, high cleanliness
Steel	Polishing	Use a grinding wheel or cloth wheel and wax to remove to maintain the surface finish.	Can reach between Ra0.6UM-Ra1.6UM
	Polishing, Plating Nickel/Chrome/Zinc	The process of using electrolysis to attach a metal film to the surface of metal or other materials to prevent metal oxidation (such as rust), improve wear resistance, electrical conductivity, light reflectivity, corrosion resistance (copper sulfate, etc.) and Enhance beauty and other functions.	According to ASTM B578-1987 (R2015) standard
	Heat treatment	Metal heat treatment is a process that heats, heats, and cools a metal precision CNC machining in a certain medium, and controls its performance by changing the surface or internal structure of the metal material.	According to the standard BAC5617 execution
	Powder coated	The spraying effect of powder spraying is in terms of mechanical strength, adhesion, corrosion resistance, aging resistance, etc.	Standard Guide for Testing Coating Powders and Powder Coatings in accordance with ASTM D 3451-2006
Brass	Plating Nickel	There are two processes of electroless nickel plating and electrolytic nickel plating, one is for conductive, the other is for decorative protection.	1. Improve anti-corrosion fatigue life. 2. Improve the service life of wear
	Chrome	The process of using electrolysis to attach a metal custom CNC machining parts film to the surface of a metal or other material.	Improve precision CNC machining parts wear resistance, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance aesthetics
	Zinc	The purpose of cold galvanizing is mainly to prevent rust, and hot galvanizing has high anti-corrosion and anti-rust effect.	ASTM B695-2000 and military C-81562 mechanical galvanizing technical standards
	PVD	Before the copper is used for PVD, we must first polish and chrome the copper, and then perform PVD, the effect is even more beautiful than the ordinary electroplated surface.	Wear-resistant, high clarity, can be made in a variety of colors

The difference between rapid prototype precision cnc machining parts and mass production, how to truly achieve the quality that meets the requirements while making the efficiency higher and faster and reducing the cost?

Processing properties	Prototype	(More than 500 pieces of MOQ) mass production	Required time
Review	Drawing/Material/Size	Drawing/Key size/Process breakdown	1 hour
DFM recognition	Structure optimization	Identify key dimensions, reference dimensions and speed adjustment recommendations for tool path layout	2 hour
Process selection		Drawings according to the process and description of key requirements	3 hour
Fixture	Optional sharing Fixture	Design a special fixture to optimize the clamping method	5 hour
Tool	Choose a sharing tool	Custom-made special tools	Synchronize for 10 hours
Polishing	Knife shape can be polished by hand	Basically do not consider polishing
Measuring tool	Basically there are standard measuring tools, increasing the measurement time	Customized special inspection tools	Synchronize for 5 hours
Packing and shipping	Use shared packaging first	Customized special packaging materials	Synchronize for 10 hours
Overview	Fast delivery, poor tolerance stability, and basic manual surface treatment	The efficiency should be more than 30% faster, and the surface texture is high

FAQ in CNC machining

1.Why is the surface of precision CNC machining turning parts uneven or not smooth?

The main reason is that in the finishing process, the performance of the cutting oil cannot meet the processing requirements. When the tool feed speed is too fast, the vibration caused by the rapid movement of the tool will easily leave an uneven track on the custom machined components parts surface. Sometimes the tool marks between two adjacent tool paths will have a certain difference, which is caused by the inconsistent cutting direction of the tool. To avoid this problem, you should use the full down milling method and use a special cutting oil.
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Why are the tool marks on the side of precision CNC finishing milling too obvious?

The main reason for this problem is improper selection of the position and parameter of the tool advancement and retreat. The milling methods provided by different processing software will be different, but the depth selection of the tool and the parameter selection of the tool will all be provided. In addition, when using non-special cutting oil, due to insufficient pressure and anti-wear properties, the oil film breaks instantaneously during the processing, causing scratches on the workpiece. If you want to avoid the above improvement problems, you can make relevant adjustments from four aspects. The first is to select the feed point correctly, the second is to add an overlap when cutting in the middle, the third is to use full-cut deep processing when finishing the side surface, and the fourth is to use special cutting oil.
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How to avoid tool change marks in the finishing milling process of precision machining parts?

When finishing milling on the bottom or side, tool marks often appear. Many times people think this is an inevitable mistake. In fact, it is completely avoidable. In order to solve this problem, in the processing of the workpiece, the finishing of the concave corner needs to be replaced with a small tool. Due to the force and swing during the custom machined components parts process, it is easy to produce tool marks at the corners.
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Why are there burrs or sharp edges on the precision cnc machining parts surface or sides after polishing?

To solve this problem, you need to pay great attention to the use of tools and use special tools to ensure sharp cuts. In addition, it is necessary to plan the tool path and increase the secondary finishing tool path. That is, the surface is processed first, then the side surface, and then the surface is processed to ensure that there are no burrs and sharp edges, which are useful for workpieces that cannot be polished.
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How to make special-shaped precision cnc machining parts to achieve finishing?

For the finishing of some special-shaped custom machined components parts, the software usually has fitting errors. Sometimes if the calculation error is too large, it will cause deformation of the parts and affect the appearance. To solve this problem, you need to start with software and control errors. This value is reasonable, and neither affects the calculation speed nor deforms the workpiece.
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How do we charge for our precision cnc machining? Choosing equipment suitable for product is the best way to ensure the quality and efficiency？

Machine photo	Machine model	Hourly charge USD
	CNC multi-head engraving machine	9USD
	3-axis drilling and tapping cnc milling	8USD
	3+2 cnc milling	8USD
	5-axis cnc milling	10USD

Why choose VMT precision CNC machining services?

All manufacturing processes are completed in-house, with its own machinery and equipment. The factory is equipped with precision-carved CNC, 3-axis CNC, 3+2 CNC, and 5-axis CNC.
Regarding the process, VMT has aluminum extrusion + CNC Machining, forging + CNC Machining, stamping, drawing, welding + CNC Machining to complete production. VMT is a parts supplier with the most complete equipment and technology for CNC Machining services in China!
Our online professional and high efficient team will server you with 24 hours.

Professional engineers review drawings online, and assist customers in optimizing engineering drawings for free, and participate in design suggestions and assistance.
Quotation completion time goal: within 30 minutes DFM and optimized engineering drawing goal within 2 hours.
Delivery time: the target of the prototype prototype of the urgent item is completed within 24 hours, and the target of mass production of the urgent item: 7 working days.