Part machining services include prototype machining and machining threads.

Modern manufacturing requires three basic processing capabilities: high-precision parts processing, rapid prototyping services, and special processing threads for assembly of key components.

Difference between External and Internal Threads

Let's quickly understand this basic difference. External threads are usually found on screws and bolts, while internal threads are found in components you design and manufacture. Internal threads achieve connections by locking external threads (such as screws and bolts).

In your technical drawings, it is important to know how to recognize the difference between external and internal threads.

What are the main parameters for indicating threads?

Thread profile: Common thread profiles include United Nations (UNC) and Metric (M), etc.

Thread type: In different thread series, you will encounter multiple thread types, such as UNC and UNF for unified threads, and M and MJ for metric threads.

Nominal diameter/major diameter/thread size: These terms are used to indicate the size of the thread, specifically the major diameter of the thread.

Pitch: The distance a point moves in one rotation along the axis.

Depth: The depth of the thread cut into the hole, which can be a through hole or a blind hole.

Allowances: The allowable tolerance range of thread fit.

Class fit/tolerance/allowance: Defines the tolerance range of thread size, including major diameter, minor diameter and pitch diameter, as well as internal or external threaded components.

We recommend using standard drill bit sizes, as custom tooling costs considerably and increases production time.

What are blind and through holes?

When cutting threads, an important consideration is whether you need to drill a blind hole or a through hole. A blind hole is a hole that does not pass through the entire part, so its depth is clearly specified. In contrast, a through hole is a hole that penetrates the surface of the component and has a depth equal to the thickness of the wall it passes through.

​FAQ:

Q: Are you a trading company or manufacturer?
A: We are a factory.

Q: How can I obtain a quotation?
A: To receive a quotation, please send us drawings in formats such as IGS, DWG, STEP, etc., along with a detailed PDF. If you have any specific requirements, please include them in the request, and we will provide professional advice for your reference.

Q: What if I don't have a drawing?
A: In such cases, you can provide us with samples or drawings. Rest assured, we will ensure the safety and confidentiality of any provided drawings.

Q: What is your delivery time?
A: Normally, it takes 7-14 days for the parts to be ready. We have systems in place to ensure timely delivery.

Q: How do you ship the products? What are the packing details?
A: For small quantity orders, we have partnerships with courier services like TNT, FEDEX, UPS, etc. For larger quantities, air or sea shipment options are available. We have standard packing details, but if you have any specific requirements, we are willing to assist you.

Q: Do you provide samples? Is there an extra charge?
A: Yes, we can provide samples, but there may be an extra charge for them.

Q: What are your payment terms? How can I make the payment?
A: Our payment terms are 50% T/T (bank transfer) in advance, with the balance payment due before shipment. If you have any other questions, please feel free to contact us.

Shenzhen Hongsinn Precision Co., Ltd is a professional custom precision machining parts manufacturer. Hongsinn was established in 2010 and located in Shenzhen a famous manufacturing city in China .

We own multiple CNC 4-axis and 5-axis machining centers, turn-milling combination NC machines, gantry grinding and milling machines, wire cutting and other equipments. inspecting instruments include Zeiss CMM Measuring Machine,and Mitutoyo CMM Measuring Machine , Keyence automatic image detector, USA made analyzer, surface roughness meter, etc. With a high passionate Manufacturing and quality controling team , we can process all kinds of parts by various materials ( mild steel, aluminum alloy, stainless steel, all plastic ,special die steel, brass, bronze, copper, titamiun alloy, magnesium alloys,composite material, Hitachi Daido special steel, resin materials, etc.) efficiently.Factory is in famous machining industrial town where has complete  heat treatment and coating supply chain and enable us to handle all kinds of hardness and hardness depth requirements prodcuts , also various coating like all color anodize, chrome plating,electroless nickel plating,zinc plating,black oxide,PVC,TiN ,nitride etc.

Hongsinn is certified ISO9001:2015 license. We prioritize quality in every aspect of our production process. We adhere to strict quality control procrdure and implement advanced quality management policy to ensure that every part meets customer requirements. 

Shortest lead time to 3 days to catch customer project schedule requirements and let customer keep competitive in  their market.We are able to provide customers with excellent service and maintain open lines of communication with our clients throughout the manufacturing process.

MOQ 1 pc  and flexible capacity, no order too small or too big for us.

We always aim at to maxmize customer profitability,Offer extremely competitive price, to be customers' most reliable long-term partner.