Brass CNC Turned Milled Parts Machining Services Customizable

The key advantages and disadvantages of CNC technology are summarised below:

• CNC machining offers excellent accuracy and repeatability and can produce parts with very tight tolerances, making it ideal for high-end applications.
• CNC materials have excellent and fully-isotropic physical properties and are suitable for most engineering applications.
• CNC is the most cost-effective manufacturing process for producing low-to-medium numbers of metal parts (from one-off prototypes, up to 50000 units)
• Due to the subtractive nature of CNC machining, specific geometries are either very costly or impossible to manufacture.
• The start-up cost of CNC machining is high compared to 3D printing, so CNC is less suited for low-cost prototyping (for example, comparing metal and plastic).

The lead times of CNC machining (10 days) are longer than the lead times of 3D printing (2-5 days), as CNC machines are not as widely available since they require expert knowledge to operate.

HOW TO IMPROVE YOUR CAD DESIGNS FOR CNC MACHINING

CNC Design Rules and Tips

When designing 3D CAD parts that are going to be CNC programmed using CAM software, a few rules or pointers can be followed to allow the part to be machined on a CNC machine.

For example, one needs to remember that the cutting tool used is round, so you cannot have square corners in some places, so one needs to be aware of the cutting tools used.

Here are some rules to follow when designing for CNC machining to prevent the CNC programmer from redesigning your part when they are doing the programming.

1. Maximum part size

• CNC milling 1500x800x800mm
• CNC turning Ø800x1000mm

Maximum part size depends on your machine size; giant machines can produce parts bigger than 2mx0.8mx1m, five-axis CNC machines have a smaller volume.

2. Take note of wall thickness.

• Metals: Minimum 0.8mm Plastics: Minimum 1.5mm
• Absolute minimum 0.6mm

Thin walls on a part allow for more opportunity to break, no matter what the material. Wall thickness is proportional to the stiffness of the material, so thinner wall thickness leads to vibrations when machining. As a guideline, keep this in mind: for metals, try not to go below 0.8mm, and plastics not less than 1.5mm. Try to design your part from sheet metal instead or use another manufacturing method if required.

3. Height of tall features

• Typically Maximum: 4 x part length

Vibration becomes a problem when machining tall features. Try to work by the ratio of max height is 4 x the length to minimize machine vibrations.

4. Try not to use too many tolerances in your design.

• Standard: ±0.125mm
• Minimum: ±0.001mm

Tolerances are necessary for a design; excess tolerancing only increases machining time and cost. Tight tolerances should only be specified where essential and should keep with the CNC machines tolerance ability. Some standard tolerance to stick by for most CNC machines is ±0.125mm, whereas down to ±0.001mm is feasible. Tolerances should be defined on all critical features.

5. Holes should have accurate length to width ratios.

• Maximum: Hole length = 4x Hole diameter

Try to work with the ratio hole diameter is less than 4 x the length of the hole. If the hole is too deep, this results in the tool deflecting and makes it difficult to remove the chips, leading to tool fracture. An example is a hole 10mm wide that should not be more than 40 mm deep. Deeper holes need to be machined with larger diameter cutting tools; bear this in mind.

6. Limit thread length

• Maximum thread length=3 x hole diameter
• Recommended: M6 or higher
• Smallest: around M2

Strong threads are formed in the first few turns, so long threads are pretty unnecessary; as a rule of thumb, try to design your thread three times longer than the hole diameter. Choose larger threads if possible; they are easier to machine.

Advantages Of Precision CNC Machining

• Fast and repeatable for low volume manufacturing
• CNC prototypes deliver on precise and high tolerance specifications
• Wide range of production and rapid prototype manufacturing materials
• Rapid machining offers great surface finishing

Quality inspection:

Zero defect rate target, automatic inspection equipment;

One-stop customized manufacturer accept all kinds of materials;

About WINS TECH LIMITED:

· March, 2012: WINS TECH LIMITED Set Up

· October, 2014: ISO9001 Certificate

· September, 2017: WINS TECH LIMITED HongKong branch office Set Up

· December, 2017:start to expand overseas markets

· May, 2019: 2 automatic production lines set up, 4 production lines in total, factory production capacity over 1 million

· May, 2020: ISO14001 Certificate

· September, 2021: IATF16949 Certificate

· 2022~ : to be continue

Certifications

Wins tech limited guarantees the quality of your machined parts with our ISO 9001:2015, ISO 14001, and IATF16949 certified quality management system, ITAR registration, and options to add inspections, hardware traceability, material certifications, and CoCs. We accept technical drawings and have support teams to ensure you get quality CNC machined parts on time.

High speed fabrication and prototyping!
We accept OEM and ODM, customizable!
We warmly welcome clients from all over the world to come to our factory for visit and cooperation!

FAQ:

1. What is your MOQ?
Normally we do not have MOQ requested , we provide high speed fabrication and prototype service.

2. Can you offer free sample?
Yes, we can provide free samples.

3. What is your delivery time?
We will deliver in 1~5 work days