FAQ for CNC Machining Parts

FAQ

Q: I am designing a new product that requires CNC machining to create a prototype and final product. How do I select the most suitable material for CNC machining for my project?

A:At JST Industry, we understand that choosing the right CNC machining material is critical to product design. You should first consider the scenario in which your product will be used, including the required mechanical properties, temperature resistance, corrosion resistance, and cost-effectiveness. We offer a wide range of material options including, but not limited to, aluminum alloys, stainless steel, brass, various alloys, and many plastics. Our team of experts can assist you by selecting the most appropriate material for your specific needs and provide expert design optimization advice to ensure an efficient and cost-effective CNC machining process.

Q: I would like to know how the selection of different materials in CNC machining process affects the final machining cost?

A: At JST Industry, we recognize that material selection has a significant impact on CNC machining costs. The type of material, difficulty of machining, and market availability all affect its price. For example, steel is widely used due to its lower cost, while titanium alloys and certain advanced alloys are more expensive due to their higher material cost and machining difficulty. In addition, the machinability of the material also affects the cost, e.g. aluminum alloys are usually less expensive due to their ease of machining. Our quoting system takes all of these factors into account to ensure you get the most accurate cost estimate.

Q: What are some design practices that can help me reduce machining costs when designing CNC machined parts?

A: JST Industry, with years of industry experience, offers the following design optimization suggestions to reduce CNC machining costs:

Consider non-functional internal right angles in the design and change them to R angles to reduce clearance costs.

Reduce the number of bone positions on the part to minimize machining time and complexity.

Increase wall thickness where appropriate to minimize the risk of deformation of the part during machining.

Use standard hole sizes and threads whenever possible to simplify the machining process.

Work with our engineers to select economically sound material and finish options.

Mark only the tolerances that are necessary and most important to the design to avoid unnecessary accuracy requirements.

Q: I have stringent requirements for accuracy in my products, what tolerances can be achieved with CNC machining and how does this affect the quality of the final product?

A: At JST Industry, our CNC machining services are capable of meeting extremely high tolerances, often to ±0.01mm, thanks to our advanced machining equipment and strict quality control processes. This high-precision machining capability ensures consistency and reliability of parts, which is especially important for assemblies that require high-precision fit. Our quality assurance system includes multiple inspections and calibrations to ensure that each part conforms to the customer’s design drawings and tolerances, thus guaranteeing the quality of the final product.

Q: I am concerned that the surface of a CNC machined part may have burrs or be uneven. How can I ensure that the surface of the machined part is of the desired quality?

A: JST Industry utilizes a range of advanced machining technologies and stringent post-processing procedures to ensure the surface quality of CNC machined parts. Our operators perform careful deburring after

machining, including hand trimming and machine finishing, to ensure that all parts have a smooth, angular-free surface. In addition, we use precision measuring tools to check the dimensions of the parts several times to ensure that the dimensional accuracy meets the tolerance requirements. Depending on the needs of our customers, we also offer a variety of surface treatment services, such as anodizing, plating, powder coating and painting, to further enhance the appearance quality and corrosion resistance of the parts. Through these measures, we are ble to ensure that the surface quality of each part meets or exceeds our customers’ expectations.

Q: What is the definition of CNC precision machining?

A: CNC Precision Machining is a process that utilizes Computer Numerical Control (CNC) technology to machine precision parts. Through pre-programmed instructions, CNC machines are able to automatically perform complex machining operations to achieve precise control of part size, shape and surface quality.

Q: What are the advantages of CNC precision machining?

A: CNC precision machining offers several advantages, including high accuracy, efficiency and flexibility. The use of CNC technology enables precision machining of a wide range of parts with complex shapes, thereby improving productivity and quality.

Q: Which industries are suitable for CNC precision machining?

A: CNC precision machining is used in a wide range of industries, such as aerospace, automotive manufacturing, medical devices and electronics. Whether the material is metal, plastic or ceramic, it can be processed by CNC Precision Machining.

Q: What is the machining capability of CNC Precision Machining?

A: CNC Precision Machining has the ability to machine parts of various shapes and sizes, often with machining accuracies of ±0.01 millimeters or higher. The machining capability is mainly affected by the type and specification of CNC machine tools and the design of the machining process.

Q: What is the cost of CNC precision machining?

A: The cost of CNC precision machining is affected by a variety of factors, including part complexity, material selection, and machining process. Overall, CNC Precision Machining can be slightly more expensive than traditional machining methods, but can result in higher machining accuracy and quality.

Q: How to choose the right CNC precision machining service provider?

A: Selecting a suitable CNC precision machining service provider requires consideration of a number of factors, including technical strength, equipment capability, quality control system, lead time and service responsiveness. It is recommended to conduct sufficient market research and supplier evaluation, and select vendors with good reputation and professional services for cooperation.

Q: What is the capability of JST's CNC milling services and how accurate can they be?

A: With advanced CNC milling equipment and an experienced technical team, JST is able to provide a wide range of CNC milling services covering the machining of parts in a variety of materials and complexity.

Our CNC milling service capabilities can meet our customers’ needs for high-precision parts, typically with an accuracy of ±0.01 millimeters and beyond.

Q: What is JST's CNC milling service process?

A: Our CNC milling service process usually includes the following steps:

Customer Requirement Confirmation: Communicate fully with the customer to understand their needs, requirements and special requirements.

Part design and analysis: According to the drawings or samples provided by the customer, carry out part design and process analysis to determine the best machining plan.

Tool selection and process planning: select suitable tools and machining process, develop machining program and process flow.

CNC milling processing: use advanced CNC milling equipment for parts processing to ensure machining accuracy and surface quality.

Quality Inspection and Packaging: Conduct quality inspection on the machined parts to ensure that they meet the customer’s requirements, and then package and deliver them.

Q: How does JST's CNC milling service inspect and control quality?

A: We adopt a strict quality control system and advanced testing equipment to ensure that the quality of our CNC milling services is controllable.

The quality inspection means include but not limited to CMM, height gauge, white light interferometer and so on.

During the machining process, we conduct regular self-inspections and mutual inspections, as well as online monitoring of critical dimensions and surface quality.

Our quality control team oversees and manages the entire machining process to ensure consistent and reliable part machining quality.

Q: What are the machining techniques/processes of CNC Turning Service?

A: Turning : This is one of the most basic machining techniques of CNC Turning Services. The workpiece is turned and cut with a cutting tool to give it symmetry in the axial direction. Turning can be used to make a variety of shapes including shafts, tubes and face parts.

Drilling : CNC lathes can be used to create holes in workpieces, from simple piercing to deep hole drilling for different parts.

Boring : Boring is a method used to machine internal diameters for the precise machining of large diameter holes and cylindrical holes.

Threading: The use of a threading tool to cut threads in a workpiece for use with bolts and nuts.

Facing : The cutting of the end face of a workpiece to make it flat and ensure the accuracy and parallelism of the end face.

Gear Cutting: CNC lathes can also be used to manufacture rotating parts such as gears to meet the needs of various transmission systems.

Q: What types of parts are suitable for CNC Turning services?

A: Shaft Parts: Such as mechanical shafts, bushings, bearing housings, and other rotating parts that often need to be machined on a center axis.

Pipe fittings: These include pipe fittings, pipe connections, etc. These parts are usually machined on both the outside and inside diameters.

Threaded parts: such as nuts, bolts, screws, etc. These parts usually require machining on the outer diameter and threads.

End face parts: such as cover plates, gaskets and other parts that require a flat surface, these parts usually require end face machining to ensure their accuracy and surface quality.

Gear parts: These include various types of gears, which often require gear machining to ensure the accuracy and efficiency of their gear train.

Q: What equipment is required for CNC Turning services?

A: CNC Lathe: As the core equipment of the CNC Turning service, CNC lathes are capable of rotating workpieces and machining them with cutting tools, featuring high precision and efficiency.

Automatic feed mechanism: The automatic feed mechanism is used to control the relative motion of the workpiece and cutting tool to automate and precisely control the machining process.

Cutting tools: CNC Turning service requires the use of various cutting tools, such as turning tools, drills, boring tools, etc., to meet the needs of different parts processing.

Clamps and fixtures: These are used to clamp and hold workpieces to ensure stability and precision in the machining process, while minimizing workpiece deformation and vibration.

CNC control system: CNC control system is used to control the movement and machining parameters of the CNC lathe, including speed, feed, tool path, etc. to ensure the accuracy and efficiency of the machining process.

Q: Do you have reference customers?

A: Yes, we have been appointed as the supplier of Parker(USA) since 2012. “Supply the top quality custom parts” is our management philosophy, ON TIME and EVERYTIME.

Q: Do you have experience of doing business with overseas customers?

A: Yes, we have over 10 years exporting experience and 95% of our products were exported to overseas market. We specialized in the high quality OEM CNC machining parts, we are familiar with the standard of ANSI, DIN, ISO, BS, JIS, etc..

Q: Which countries have you exported?

A: The US, Canada, Germany, Switzerland, Ireland, UK, Italy, Australia, New Zealand, .

Do you provide samples?

Yes, we can provide the first article of inspection (FAI) service.

How long will it take to quote the RFQs?

Normally, it will take 1-3 days.

How long is your delivery time?

Normally, the samples delivery is 10 days and the lead time for the official order is about 30 days.

Are you a trading company or a manufacturer?

Manufacturer, most of the metal parts and plastic parts were made in our own factories.

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