In general, computer numerical control milling machine (CNC) machining is a deductive manufacturing technique that programs 3-axis linkage, complex to 5-axis linkage, drives milling cutters to remove layers from solid blocks called blanks to produce finished parts. CNC milling is one of the main types of CNC machining, which uses cutting tools that rotate at a speed of several thousand to tens of thousands of revolutions per minute (RPM) to precisely remove materials to obtain parts with complex surfaces. In addition to milling, CNC machining is also equipped with drills, boring tools, thread cutters and other tools to complete different part features at once. CNC machining produces parts based on a computer-aided design (CAD) model that is sent to a CNC machine through computer-aided manufacturing (CAM) software.
CNC Machining centers developed from CNC milling machines. The biggest difference compare to CNC milling machines is that the machining center has the ability to automatically exchange machining tools, by installing tools for different purposes on the tool magazine, the machining tools on the spindle can be changed through the automatic tool changing device in a single clamping device to achieve a variety of machining functions.
CNC Milling Finish
Process
Roughness Ra(um)
Cylindrical milling cutter milling (rough)
12.5~3.2
Cylindrical milling cutter (fine)
3.2~0.8
Cylindrical milling cutter (precision)
0.8~0.4
Cylindrical milling cutter (rough)
12.5~3.2
Cylindrical milling cutter milling (fine)
3.2~0.8
Cylindrical milling cutter milling (precision)
0.8~0.4
Cutter milling (fine)
12.5~3.2
End milling cutter (rough)
3.2~0.4
End milling cutter (precision)
0.8~0.2
High speed milling (rough)
1.6~0.8
High speed milling (fine)
0.4~0.2
CNC milling centers and high-Precision Machining centers. Ordinary machining center, resolution of 1μm, maximum feed speed of 15 ~ 25m / min, positioning accuracy of about 0μm. High-precision machining center, resolution of 0.1μm, maximum feed speed of 15 ~ 100m / min, positioning accuracy of about 2μm. Between 2 and 10 μm, with a ± 5 μm more, can be called precision grade. FCE equipped with different grade and different size CNC milling center. Take in to account into both economic and quality in parallel.
Post-processing is the final step in the CNC machining process. In a quick guide, we offer a lot of surface treatments to complete your final parts and get them to meet strict specific requirements. It should be noted that in CNC machining, post-processing is in optional, as the quality of the machined parts is already very high.
The anodizing process allows the part to obtain excellent corrosion resistance, increasing the hardness and wear resistance of the surface. Anodizing is also the most common pre-painting treatment, which can help the painted surface to obtain good adhesion. We typically apply two types of anodizing in our production: Type II, corrosion resistant; Type III is thicker, adding a layer of wear resistance. Both anodizing processes can achieve a variety of color effects.
Grinding polish, it offers the fastest turnaround parts and does not require post-processing. The surface finish of the grinding part is equivalent to 125 um in Ra, and the requirements can be increased to 63, 32 or 16 um Ra. Minor tool marks may still be visible on the last part.
Powder Coating is thermoplastic powder spraying directly on the processed part. The sprayed parts are then baked in an oven to form a durable, abrasion- and corrosion-resistant plastic coating. In the powder coating process, its color, brightness, surface roughness can be customized.
Shot peening is the high-speed spraying of beads of different hardnesses and sizes onto the surface of the part. To get different textures and brightness of the surface. Since the surface has been hit by similar forging beads, the hardness and wear resistance of the surface have also been enhanced.
CNC machining is a universal machining process, especially parts that can be cut and machined can be achieved through CNC, from simple shape shapes to complex curved structures. However, as with every manufacturing technique, CNC machining has some design limitations. We break them down as follows to ensure that your products are optimally designed to better fit the CNC machining process.
When designing parts, the size of each part is different according to the application environment, working conditions, etc., and the requirements for the machining accuracy of the workpiece are also different. Although CNC machining can achieve very high machining accuracy, we should also be aware that demanding machining accuracy and accuracy (strict product tolerances) usually mean Longer production times and higher costs. If a specific tolerance is not specified in the product design, we recommend choosing at the following levels.
Permissible deviations in mm for ranges in nominal lengths
Tolerance Class Designation(Description)
fine
medium
coarse
very coarse
0.5 up to 3
±0.05
±0.1
±0.2
--
over 3 up to 6
±0.05
±0.1
±0.3
±0.5
over 6 up to 30
±0.1
±0.2
±0.5
±1.0
over30up to 120
±0.15
±0.3
±0.8
±1.5
over120upto400
±0.2
±0.5
±1.2
±2.5
over 400up to 1000
±0.3
±0.8
±2.0
±4.0
over 1000up to 2000
±0.5
±1.2
±3.0
±6.0
over 2000 up to 4000
--
±2.0
±4.0
±8.0
The highest precision of our equipment is 0.001, and the recommended most precise machining requirements do not exceed +/-0.005mm
All internal vertical edges of our products need to have rounded corners instead of right angles. This is because the tools used in CNC milling are cylindrical, which means they cannot produce inner right-angled edges. The fillet required by this process is called the inner corner fillet. When designing parts, the larger the inner corner fillet, the more efficient the production process. Because of the larger fillets, larger diameter milling cutters can be used to increase milling speed, and fewer swaps can be made to improve accuracy.
Undercut cannot be machined with standard milling cutters, so the use of retract slots for parts should be avoided when designing CNC machined parts. In particular, for non-standard inner contour shapes, customized machining tools are required, which will greatly increase processing time and costs. Secondly, if undercut can not be avoided, due to the limited length of cnc tools, the undercut can not be too deep. If they are too deep or the location is difficult to reach, they will not be able to be produced because the CNC tool cannot reach the machining location.
CNC machining requires your part design to meet minimum wall thickness requirements. In general, it is recommended to choose the thickest possible and avoid very thin or characteristic walls. This is because CNC tools processing thin-walled parts will cause vibration deformation, which may cause interruptions or damage, and the size is out of specification. The standard minimum wall thickness for CNC machined metals is 0.030" (0.76 mm) and for plastics is 0.060" (1.5 mm).
When designing parts, it is useful to choose the largest possible thread size because smaller taps have a higher risk of breaking during production. If possible, avoid using deep hole threads as they lead to higher production costs, especially when custom tools are required.
In principle, materials with high hardness are easier to process because better processing accuracy can be obtained, but they are limited by the hardness of processing tools, so the hardness of the generally recommended parts is 8 ~ 60HRC, and for metal materials, the hardness is greater than stainless steel Followed by cast iron, followed by copper, and finally aluminum, while the processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials. Fast production time.
Although CNC can process thermoplastics, the material properties of polymers still have many difficulties for CNC processing. First, due to poor thermal conductivity, many thermoplastics melt or bend when in contact with CNC milling machines or drill bits. Secondly, the processing of plastics, because the hardness is low, the size accuracy caused by the knife during product clamping and processing is not high. For those parts that do not have special requirements for the strength and hardness of the metal, thermoplastics can provide a cheaper alternative.
Simplifying product design while taking into account functionality usually saves production time and reduces production costs. Because the manufacture of complex structures and surfaces often requires complex longer passes, more layering to obtain the same fine contour quality. This means higher production costs.
Using the same milling machine machining features, larger and same internal fillets, can reduce the number of tools used to reduce machining time. For example, if a workpiece needs a 10mm end face milling cutter to process some features, it also needs a spherical milling cutter to process a curved surface, and a 2mm milling cutter to process a fine groove, which will require repeated tool changes and reduce the machining efficiency
The choice of raw material for machining can have a significant impact on production time and costs for CNC machining. If possible, choose a material with good processability, such as brass or aluminum. For those applications that do not require metal hardness and strength, CNC machining of engineering plastics like PMMA and ABS also helps to reduce costs because the material blank is cheaper, and the processing efficiency is higher.
Higher tolerances and thinner wall thicknesses also increase THE CORRESPONDING CNC machining costs, as it takes time to achieve higher precision cutting. If your product or component can accept a larger size range, choose a lower tolerance to reduce production time and costs. The same is true for wall thickness: a larger wall thickness margin should be chosen.
Surface treatment is often the final stage of the CNC machining process, which can also affect the cost of your entire project. Choosing less surface treatment for your part or product can lead to better time and cost efficiency. FCE can recommend to you how to optimize the surface treatment to balance the conflict between cost and quality according to your final needs.
FCE facilities are equipped with the most advanced and highest precision 3, 4 and 5-axis CNC machines, which allows us to complete your order in record time
1. 15+ year work experience engineers
2. Fastest 5 days delivery
3. Prototypes can be machined as quickly as 1 day.
4. More than 200 metals and plastics material available in stock
5. Tolerances as low as +-0.005mm
6. ISO 9001: 2015 certified factory
7. 40+ CNC machines
8. 50,000+ machined parts per month
We cooperated with many world top 500 companies and awarded good responds always.
Rubber Moulding,Custom Rubber Molding,Rubber Moulding Products,Custom Molded Rubber Products Suzhou FCE precision electronics Co., LTD , https://www.fukeyifcesz.com
Parts,Precision part,Machining Parts with more than 13 years experience.
Customize available when get drawing or sample.
Â
1.customized CNC Machining partÂ
2.OEM & ODM by customer designÂ
3. Good appearance workingÂ
4. Complex CNC Parts
Â
1.OEM & ODM by customer design
2.Product picture shown here just for reference, we never sell them to other customers
3.Custom-made according to customer's drawings
4. Factory custom manufacture hight precision turning part
Â
Â
Â
Material Steel, Zinc, Alunumin, Brass.Stainless steel.
Surface treatment
Nickel plating. Zinc plating, Chrome plating, Oxidation. Anodization
Tolerance
+/-0.01mm or +/- 0.0004"
Thread Standard
NPT,BSP(G),M, GHT,UN,NPSM,BSPT(Tr),NPTF... Â Â
Quality control
100% inspection on critical dimensions
Inspection equipment
Three axis meansuring machine for X.Y.Z. Projection meter.
Production output
100000.000 pieces/ month
Productin range
Part ID from 2-500mm with tolerance +/-0.01mm                   Â
Experience
13 years of professional  OEM service
Supply chain process
PPAP
Ability
To develop hundreds of new parts annually. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
 Packaging
 Standard export carton with palletized
 Lead time
35 days regularlyÂ
 Term of Payment
 T/T. L/C or Customer's request
 
ABOUTÂ US:
A&T Industry is a contract manufacture and exporter of quality sand castings,
investment castings, lost foam castings, hot forgings, cold forgings, stampings,Â
machined parts, injectionmolded plastics parts, etc.
We are a dedicated team of customer focused industry professionals withÂ
extensive experience in manufacturing,  materials engineering,Â
quality assurance, logistics management  and inventory control.
We utilize our experience and sources advantage to provide our customersÂ
with cost effective and value based solutions to meet their engineering andÂ
design needs while exceeding their quality and procurement requirements.
A&T Industry is located in Qingdao, a major seaport, Olympic Host City andÂ
industrial center of China.Â
Assurance,
 100% quality manufacturing.
 We guarantee that our products meet your supplied specifications
Â
Extremely competitive pricing
 Delivery to your port or front door
 4 ---- 8 week lead times
 We handle all paperwork
 Partial container orders
 Flexible payment options
 Unique tooling options
 Full range of packaging options from bulk to retail ready
Â
Complete testing services available
FAQs
1. Where is your location?
We are located in Qingdao City of China and are closed to Airport. It takes 30minuts by car from Liuting
Airport our company.
2. How long has the company been established?
AT INDUSTRY was established in 2009. There is 6 years exporting experiences.
3. How many employees do you have?
Administration / sales   4
Engineering / design as our partner    8
Production as our partners 120
Quality assurance / inspection  10
4. Which countries do you export to?
U.S.A, Germany, France, Italy, UK, Brazil, Middle east of Asia, Thailand,Â
5. What proportion of your goods are exported?
100% of our production are exported to all over the world.
6. How long does it take to receive samples?
a) Pattern:30-45days after orderÂ
b) Sample:30days after pattern finishing.
c) The lead time is the general production period and does not include the transportation time.
7. New product development process
Got tooling order and sample order with 50% deposit---Hold a meeting with the relation dept. to ensure
the developing schedule---Design pattern, fixture and gauge and making them in our house---mold steel
buying---Machining---Inspection---Send out the sample with initial inspection report.
8. How long is the manufacturing lead time?
Mass Production:Â 90days after sample approval by yours.
The lead time is the general production period including the transportation time.
We could make some special production arrangement effectively if customer has urgent need.
9. What basis can we buy goods?
We generally offer customers prices FOB& CIF (Carriage, Insurance & Freight). The CIF includes the
freight cost to your nominated sea port.
We do provide clearance of goods which needs to be handled by a local freight forwarder.
All local costs and taxes are the responsibility of the buyer. We are happy to offer advisement on shipping
if required.Â
10. What are the payment terms?
Payment terms are negotiable and will improve for long term customers.
During the initial stages, we request 50% of tooling fee in advance with the balance payable on
acceptance of samples.
Production orders can be negotiable. We prefer 50% deposit and the balance by T/T before sails. But
sometimes T/T 30 days after sails would also acceptable.Â
11. Which currency can we buy in?
We can deal in USD / Euro currency / GBP.
12. How long does it take to ship goods from China by sea?
It takes about 5 weeks to European ports plus 1 week customs clearance, so you can get the container
within 6 to 7 weeks. It takes about 2 weeks to east coast and 3 weeks to west coast US ports. All sea
goods are shipped from Qingdao Port.Â
13. How long does it take to ship goods from China by air?
It takes about 7 days to all major destinations.Â
14. Can we visit the factory to conduct an audit?
Yes, you are welcome to visit our partner factory by prior agreement.Â
15. How do we retain client confidentiality?
We are happy to sign Confidentiality Agreements with customers and will honor them.
16. Which languages do we do business in?
Although we do business with many countries around the world, we can only communicate effectively in
Chinese English.
All information supplied should therefore be supplied in this form.Â
17. Is there a minimum volume of business required to conduct international purchasing?
There are no minimum volumes, but the prices of the goods, plus the fixed costs of importing makes it
more economical to buy in high volumes. All potential customers will be assessed on an individual basis
to determine if it appears a viable option for all parties to develop a relationship.Â
18. What type of parts you are specialized in?
Our business contains two areas,Â
one is for construction precast including lifting system, rigging hardware metal parts.Â
Â
Another is customized metal business of quality sand castings,
investment castings, lost foam castings, hot forgings, cold forgings, stampings,
machined parts, injectionmolded plastics parts, etc.Â
19. Which kind of equipments do you have?
Forging friction press 160Ton, 300Ton, 630Ton, 1200Ton
Casting furnace of 200kg, 500kg,1000kgs, 2000kgs
Press of 63ton, 120tons
CNC Machining center
CNC Vertical Lathe
CNC Lathe center
Boring machine
Drilling machine
Â
A&T Industry is a contract manufacture and exporter of high customized  forging parts,Aluminum
Parts,Precision part,Machining Parts with more than 13 years experience.
Customize available when get drawing or sample.
Â
1.customized cnc machining partÂ
2.OEM & ODM by customer designÂ
3. Good appearance workingÂ
4. Complex CNC Parts
Â
1.OEM & ODM by customer design
2.Product picture shown here just for reference, we never sell them to other customers
3.Custom-made according to customer's drawings
4. Factory custom manufacture hight precision turning part
Â
Â
Â
Material Steel, Zinc, Alunumin, Brass.Stainless steel.
Surface treatment
Nickel plating. Zinc plating, Chrome plating, Oxidation. Anodization
Tolerance
+/-0.01mm or +/- 0.0004"
Thread Standard
NPT,BSP(G),M, GHT,UN,NPSM,BSPT(Tr),NPTF... Â Â
Quality control
100% inspection on critical dimensions
Inspection equipment
Three axis meansuring machine for X.Y.Z. Projection meter.
Production output
100000.000 pieces/ month
Productin range
Part ID from 2-500mm with tolerance +/-0.01mm                   Â
Experience
13 years of professional  OEM service
Supply chain process
PPAP
Ability
To develop hundreds of new parts annually. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
 Packaging
 Standard export carton with palletized
 Lead time
35 days regularlyÂ
 Term of Payment
 T/T. L/C or Customer's request
Â
ABOUTÂ US:
A&T Industry is a contract manufacture and exporter of quality sand castings,
investment castings, lost foam castings, hot forgings, cold forgings, stampings,Â
machined parts, injectionmolded plastics parts, etc.
We are a dedicated team of customer focused industry professionals withÂ
extensive experience in manufacturing,  materials engineering,Â
quality assurance, logistics management  and inventory control.
We utilize our experience and sources advantage to provide our customersÂ
with cost effective and value based solutions to meet their engineering andÂ
design needs while exceeding their quality and procurement requirements.
A&T Industry is located in Qingdao, a major seaport, Olympic Host City andÂ
industrial center of China.Â
Assurance,
 100% quality manufacturing.
 We guarantee that our products meet your supplied specifications
Â
Extremely competitive pricing
 Delivery to your port or front door
 4 ---- 8 week lead times
 We handle all paperwork
 Partial container orders
 Flexible payment options
 Unique tooling options
 Full range of packaging options from bulk to retail ready
Â
Complete testing services available
FAQs
1. Where is your location?
We are located in Qingdao City of China and are closed to Airport. It takes 30minuts by car from Liuting
Airport our company.
2. How long has the company been established?
AT INDUSTRY was established in 2009. There is 6 years exporting experiences.
3. How many employees do you have?
Administration / sales   4
Engineering / design as our partner    8
Production as our partners 120
Quality assurance / inspection  10
4. Which countries do you export to?
U.S.A, Germany, France, Italy, UK, Brazil, Middle east of Asia, Thailand,Â
5. What proportion of your goods are exported?
100% of our production are exported to all over the world.
6. How long does it take to receive samples?
a) Pattern:30-45days after orderÂ
b) Sample:30days after pattern finishing.
c) The lead time is the general production period and does not include the transportation time.
7. New product development process
Got tooling order and sample order with 50% deposit---Hold a meeting with the relation dept. to ensure
the developing schedule---Design pattern, fixture and gauge and making them in our house---mold steel
buying---Machining---Inspection---Send out the sample with initial inspection report.
8. How long is the manufacturing lead time?
Mass Production:Â 90days after sample approval by yours.
The lead time is the general production period including the transportation time.
We could make some special production arrangement effectively if customer has urgent need.
9. What basis can we buy goods?
We generally offer customers prices FOB& CIF (Carriage, Insurance & Freight). The CIF includes the
freight cost to your nominated sea port.
We do provide clearance of goods which needs to be handled by a local freight forwarder.
All local costs and taxes are the responsibility of the buyer. We are happy to offer advisement on shipping
if required.Â
10. What are the payment terms?
Payment terms are negotiable and will improve for long term customers.
During the initial stages, we request 50% of tooling fee in advance with the balance payable on
acceptance of samples.
Production orders can be negotiable. We prefer 50% deposit and the balance by T/T before sails. But
sometimes T/T 30 days after sails would also acceptable.Â
11. Which currency can we buy in?
We can deal in USD / Euro currency / GBP.
12. How long does it take to ship goods from China by sea?
It takes about 5 weeks to European ports plus 1 week customs clearance, so you can get the container
within 6 to 7 weeks. It takes about 2 weeks to east coast and 3 weeks to west coast US ports. All sea
goods are shipped from Qingdao Port.Â
13. How long does it take to ship goods from China by air?
It takes about 7 days to all major destinations.Â
14. Can we visit the factory to conduct an audit?
Yes, you are welcome to visit our partner factory by prior agreement.Â
15. How do we retain client confidentiality?
We are happy to sign Confidentiality Agreements with customers and will honor them.
16. Which languages do we do business in?
Although we do business with many countries around the world, we can only communicate effectively in
Chinese English.
All information supplied should therefore be supplied in this form.Â
17. Is there a minimum volume of business required to conduct international purchasing?
There are no minimum volumes, but the prices of the goods, plus the fixed costs of importing makes it
more economical to buy in high volumes. All potential customers will be assessed on an individual basis
to determine if it appears a viable option for all parties to develop a relationship.Â
18. What type of parts you are specialized in?
Our business contains two areas,Â
one is for construction precast including lifting system, rigging hardware metal parts.Â
Â
Another is customized metal business of quality sand castings,
investment castings, lost foam castings, hot forgings, cold forgings, stampings,
machined parts, injectionmolded plastics parts, etc.Â
19. Which kind of equipments do you have?
Forging friction press 160Ton, 300Ton, 630Ton, 1200Ton
Casting furnace of 200kg, 500kg,1000kgs, 2000kgs
Press of 63ton, 120tons
CNC Machining center
CNC Vertical Lathe
CNC Lathe center
Boring machine
Drilling machine
Â
What is Precision CNC Milling
CNC milling accuracy
CNC Finishing surface treatment
Anodized
Polishing
Powder coatings
Shot blasting
Design of CNC machining
General Tolerance
Interior angle
Undercut
Chamber wall thickness
Thread
Metal
Polymer
Cost optimization of machined products
Simplify product design
Reduce cutter changes
Proper material selection
Tolerance and wall thickness
Choice of surface treatment
FCE Machining services
ISO9001 CNC Machinery Part, Machine Spare Parts Aluminum Parts
Model NO.: customized
Package: Within Wooden Crate
Surface Condition: Sand Blasting
Original: China
Trade Mark: at OEM ODM
Production Capability: 30,000 PCS / Month
Shipping Port: Qingdao
Trademark: AT
Transport Package: Wooden Box
Specification: CE SGS ISO
Origin: China
HS Code: 84485900
Model NO.: customized
Package: Within Wooden Crate
Surface Condition: Sand Blasting
Original: China
Trade Mark: at OEM ODM
Production Capability: 30,000 PCS / Month
Shipping Port: Qingdao
Trademark: AT
Transport Package: Wooden Box
Specification: CE SGS ISO
Origin: China
HS Code: 84485900
A&T Industry is a contract manufacture and exporter of high customized  forging parts,Aluminum