Product Description

Fast production Custom manufacturing brass medical device parts CNC Machined CZPT knurling copper bronze threaded brass hose fitting

 

Click here and specify your inquiry, contact us to get an online quote now!

 

How to get a quote?

 

1. First: Email us and offer your 3D drawing/2D drawing to us to quote.
2. Second: Let us know the required material, surface finish and special tolerance requirements, quantity information, we’ll arrange for our engineer to review your drawings and quote soon!

 

Note: Workable 3D Drawing Formats: STEP/IGS/X_T/STL/SOLIDWORKS etc, 2D Drawing with PDF will do.

Project Support: Free Sample Offered Before Production starts

Examples projects

What we can offer

 

Advantages	»Free sample offered before production »Good machining quality and warm service »Reasonable Pricing and outstanding quality provided »Competitive shipping cost service with discount sometimes »MOQ 1PCS and small quantity order accepted, mass production supported »Professional engineering service when any modification required »Any turnkey assembly or customized package requirements, we’ll meet your demands!
Equipment	»20 sets of CNC turning machines; »30 sets of the most technologically advanced machining CNC milling machines; »25 sets of Multi-Spindle Japan Precision Swiss CNC lathes
RFQ	Customer Inquiry →Engineering Communication →Cost Analysis →Sales Analysis →Quote to Customer » 1-3 Work Days Only » Submit RFQ with complete commercial terms
Sample Making	Sample Order → Engineering Review → Sample Plan to Customer → Sample Status Tracking → Submit Samples with Doc. » Sample L/T: 1 week » Continuous Sample Status Tracking » Complete Documents for sample approval
Order Management	CRM System → Open Order Confirm → Logistic Arrangement. » Production L/T: 2-4 wks » Weekly Open Order Confirm » Preferred 3PL Service to Customers
Quality Control	Certificates: RoHS, ISO9001:2008, SGS. IQC → IPQC → OQC/FQC → Quality Complain Feedback → Audit & Training. » Plant Audit and Qualified by world famous company » Strict Quality Management Procedure with Traceability
Application	»Aerospace »Automotive »Lighting fittings »Motorbike »PhotoGear »EDC Tools » Marine »Office equipment »Home appliance »Medical equipment »Telecommunication »Electrical & Electronics »Fire detection system, etc.

Production information

1). Material Capabilities: Following GB, DIN, and ISO and applying good quality homemade and import materials, we have already provided single/assembly products for international customers mainly from the USA and Europe, etc.

Stainless Steel	SS201, SS301, SS303, SS304, SS316, SS416 etc.
Steel	Mild steel, Carbon steel, 4140, 4340, Q235, Q345B, 20#, 45#, etc.
Brass	HPb63, HPb62, HPb61, HPb59, H59, H62, H68, H80 etc.
Copper	C11000, C12000, C12000 C36000 etc.
Aluminum	AL6061, Al6063, AL6082, AL7075, AL5052, A380 etc.
Iron	A36, 45#, 1213, 12L14, 1215 etc.
Plastic	ABS, PC, PE, POM, Delrin, Nylon, PP, PEI, Peek etc.

2). Quality control:
*We have specialized QC testers to check the quality of the products according to different customers’ requirements. Usually, it’s a random inspection, and we also offer 100% inspection at a reasonable price if required.
*We have IQC to check the dimensions and surface of the incoming material
*We have PQC to inspect full-course during the manufacturing processing
*We have FQC to inspect all the anodizing/plating and other finishes’ products from our supplier and proceed with the professional quality and appearance inspection before shipping.

3).Surface Finish: sandblasted/normal and hard anodized finish/polish/coating/polish/passivation/plating/brush/heat treatment/fine glass beads/grounding/tumbled finish , etc. More detailed information for different material parts is below,

Aluminum parts	Brushing Polishing Clear Anodized Color Anodized Sandblast Anodized Chemical Film
Stainless Steel parts	Polishing Passivated Sandblasting Plating
Steel Parts	Zinc plating Oxide Black Nickel plating Chrome plating Carburized Heat treatment Powder Coated
Plastic Parts	Chrome plating Polishing

4). Payment terms: T/T payment. The Sample order is paid by full payment; Mass production with order amount exceeding can be paid a 50% deposit before production, and balance paid before shipping.

5). Production schedule: Usually, it takes 5~10 working days for sample production; 15~20 working days for mass production days, it depends on your design, simple parts can be produced quickly, the complicated design parts would take us more machining time.

6). Machining capability: 30 sets of the most technologically advanced machining CNC milling machines, 20 sets of CNC turning machines, 25 sets of Multi-Spindle Japan Precision Swiss CNC lathes, and 4 sets of 2D &3D CMM (image measuring instrument) quality control equipment 3 QC staff, enabling CNC Manufacturing to deliver precise parts within the tightest of tolerances, ensuring the highest quality results to meet different
customers’ requirements.

7). Tolerance: +/- 0.02mm (for Metal shaft), +/-0.03mm ( for plastic), for special tolerance requirements, please point them out in the email, we will Check if it’s feasible to make it after studying it.

8). Packing & Shipping way:

1. Packing Detail: Each product is packed with plastic preservative, EPE, foam plastic bag, Carton outside, wood case or iron case or as per the customer’s special requirement. Besides, the custom package takes a week to prepare in advance.

2. Delivery Detail: the fast International Shipping time takes 3 ~5 working days by DHL/UPS/FedEx, slow shipping time takes 7~ 8 working days by DHL/UPS/FedEx/TNT, etc.

3. Shipping options:
1) 0-100kg: express&air freight priority,
2) >100kg: sea freight priority,
3) As per customized specifications

About us

Full-service precision CNC machining services for prototypes and short and low to high production runs. Capabilities are CNC milled and turned metal parts and assemblies. Materials worked with include aluminum, brass, copper, stainless, steel, iron, other precious metals, and other plastic materials. Lead times are 2 to 3 weeks for prototypes and 4 to 6 weeks for production runs. Emergency and rush services are available. Industries served include aircraft and aerospace, consumer electronics, automotive, machinery fittings, audio equipment, EDC tools, computer, and Secondary processes such as anodizing, sandblasting, blackening, grinding, honing, heat treating, powder coating, passivation, polishing, plating, and brushing are also provided.

We put high attention and effort into all of the work that we do. Every part that comes off our machines is an extension of us. We take great pride in bringing machining CZPT to our customers. The amazing quality parts we machined here will be your best choice to find a supplier!

 

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Screw Shaft Features Explained

When choosing the screw shaft for your application, you should consider the features of the screws: threads, lead, pitch, helix angle, and more. You may be wondering what these features mean and how they affect the screw’s performance. This article explains the differences between these factors. The following are the features that affect the performance of screws and their properties. You can use these to make an informed decision and purchase the right screw. You can learn more about these features by reading the following articles.

Threads

The major diameter of a screw thread is the larger of the 2 extreme diameters. The major diameter of a screw is also known as the outside diameter. This dimension can’t be directly measured, but can be determined by measuring the distance between adjacent sides of the thread. In addition, the mean area of a screw thread is known as the pitch. The diameter of the thread and pitch line are directly proportional to the overall size of the screw.
The threads are classified by the diameter and pitch. The major diameter of a screw shaft has the largest number of threads; the smaller diameter is called the minor diameter. The thread angle, also known as the helix angle, is measured perpendicular to the axis of the screw. The major diameter is the largest part of the screw; the minor diameter is the lower end of the screw. The thread angle is the half distance between the major and minor diameters. The minor diameter is the outer surface of the screw, while the top surface corresponds to the major diameter.
The pitch is measured at the crest of a thread. In other words, a 16-pitch thread has a diameter of 1 sixteenth of the screw shaft’s diameter. The actual diameter is 0.03125 inches. Moreover, a large number of manufacturers use this measurement to determine the thread pitch. The pitch diameter is a critical factor in successful mating of male and female threads. So, when determining the pitch diameter, you need to check the thread pitch plate of a screw.

Lead

In screw shaft applications, a solid, corrosion-resistant material is an important requirement. Lead screws are a robust choice, which ensure shaft direction accuracy. This material is widely used in lathes and measuring instruments. They have black oxide coatings and are suited for environments where rusting is not acceptable. These screws are also relatively inexpensive. Here are some advantages of lead screws. They are highly durable, cost-effective, and offer high reliability.
A lead screw system may have multiple starts, or threads that run parallel to each other. The lead is the distance the nut travels along the shaft during a single revolution. The smaller the lead, the tighter the thread. The lead can also be expressed as the pitch, which is the distance between adjacent thread crests or troughs. A lead screw has a smaller pitch than a nut, and the smaller the lead, the greater its linear speed.
When choosing lead screws, the critical speed is the maximum number of revolutions per minute. This is determined by the minor diameter of the shaft and its length. The critical speed should never be exceeded or the lead will become distorted or cracked. The recommended operational speed is around 80 percent of the evaluated critical speed. Moreover, the lead screw must be properly aligned to avoid excessive vibrations. In addition, the screw pitch must be within the design tolerance of the shaft.

Pitch

The pitch of a screw shaft can be viewed as the distance between the crest of a thread and the surface where the threads meet. In mathematics, the pitch is equivalent to the length of 1 wavelength. The pitch of a screw shaft also relates to the diameter of the threads. In the following, the pitch of a screw is explained. It is important to note that the pitch of a screw is not a metric measurement. In the following, we will define the 2 terms and discuss how they relate to 1 another.
A screw’s pitch is not the same in all countries. The United Kingdom, Canada, and the United States have standardized screw threads according to the UN system. Therefore, there is a need to specify the pitch of a screw shaft when a screw is being manufactured. The standardization of pitch and diameter has also reduced the cost of screw manufacturing. Nevertheless, screw threads are still expensive. The United Kingdom, Canada, and the United States have introduced a system for the calculation of screw pitch.
The pitch of a lead screw is the same as that of a lead screw. The diameter is 0.25 inches and the circumference is 0.79 inches. When calculating the mechanical advantage of a screw, divide the diameter by its pitch. The larger the pitch, the more threads the screw has, increasing its critical speed and stiffness. The pitch of a screw shaft is also proportional to the number of starts in the shaft.

Helix angle

The helix angle of a screw shaft is the angle formed between the circumference of the cylinder and its helix. Both of these angles must be equal to 90 degrees. The larger the lead angle, the smaller the helix angle. Some reference materials refer to angle B as the helix angle. However, the actual angle is derived from calculating the screw geometry. Read on for more information. Listed below are some of the differences between helix angles and lead angles.
High helix screws have a long lead. This length reduces the number of effective turns of the screw. Because of this, fine pitch screws are usually used for small movements. A typical example is a 16-mm x 5-inch screw. Another example of a fine pitch screw is a 12x2mm screw. It is used for small moves. This type of screw has a lower lead angle than a high-helix screw.
A screw’s helix angle refers to the relative angle of the flight of the helix to the plane of the screw axis. While screw helix angles are not often altered from the standard square pitch, they can have an effect on processing. Changing the helix angle is more common in two-stage screws, special mixing screws, and metering screws. When a screw is designed for this function, it should be able to handle the materials it is made of.

Size

The diameter of a screw is its diameter, measured from the head to the shaft. Screw diameters are standardized by the American Society of Mechanical Engineers. The diameters of screws range from 3/50 inches to 16 inches, and more recently, fractions of an inch have been added. However, shaft diameters may vary depending on the job, so it is important to know the right size for the job. The size chart below shows the common sizes for screws.
Screws are generally referred to by their gauge, which is the major diameter. Screws with a major diameter less than a quarter of an inch are usually labeled as #0 to #14 and larger screws are labeled as sizes in fractions of an inch. There are also decimal equivalents of each screw size. These measurements will help you choose the correct size for your project. The screws with the smaller diameters were not tested.
In the previous section, we described the different shaft sizes and their specifications. These screw sizes are usually indicated by fractions of an inch, followed by a number of threads per inch. For example, a ten-inch screw has a shaft size of 2” with a thread pitch of 1/4″, and it has a diameter of 2 inches. This screw is welded to a two-inch Sch. 40 pipe. Alternatively, it can be welded to a 9-inch O.A.L. pipe.

Shape

Screws come in a wide variety of sizes and shapes, from the size of a quarter to the diameter of a U.S. quarter. Screws’ main function is to hold objects together and to translate torque into linear force. The shape of a screw shaft, if it is round, is the primary characteristic used to define its use. The following chart shows how the screw shaft differs from a quarter:
The shape of a screw shaft is determined by 2 features: its major diameter, or distance from the outer edge of the thread on 1 side to the inner smooth surface of the shaft. These are generally 2 to 16 millimeters in diameter. Screw shafts can have either a fully threaded shank or a half-threaded shank, with the latter providing better stability. Regardless of whether the screw shaft is round or domed, it is important to understand the different characteristics of a screw before attempting to install it into a project.
The screw shaft’s diameter is also important to its application. The ball circle diameter refers to the distance between the center of 2 opposite balls in contact with the grooves. The root diameter, on the other hand, refers to the distance between the bottommost grooves of the screw shaft. These are the 2 main measurements that define the screw’s overall size. Pitch and nominal diameter are important measurements for a screw’s performance in a particular application.

Lubrication

In most cases, lubrication of a screw shaft is accomplished with grease. Grease is made up of mineral or synthetic oil, thickening agent, and additives. The thickening agent can be a variety of different substances, including lithium, bentonite, aluminum, and barium complexes. A common classification for lubricating grease is NLGI Grade. While this may not be necessary when specifying the type of grease to use for a particular application, it is a useful qualitative measure.
When selecting a lubricant for a screw shaft, the operating temperature and the speed of the shaft determine the type of oil to use. Too much oil can result in heat buildup, while too little can lead to excessive wear and friction. The proper lubrication of a screw shaft directly affects the temperature rise of a ball screw, and the life of the assembly. To ensure the proper lubrication, follow the guidelines below.
Ideally, a low lubrication level is appropriate for medium-sized feed stuff factories. High lubrication level is appropriate for larger feed stuff factories. However, in low-speed applications, the lubrication level should be sufficiently high to ensure that the screws run freely. This is the only way to reduce friction and ensure the longest life possible. Lubrication of screw shafts is an important consideration for any screw.