Product Description

Product Description


Company Profile
HangZhou CZPT Metallic Products is a producing business located in HangZhou, China, specializing in the metal fabrication OEM creation of trailer chassis, and road basic safety tools VMS VSLS ARROW-BOARD sequence goods welding and assembly. We are dedicated to manufacturing large precision, compliant items in metal, aluminum, stainless steel, and so forth.

We are happy of production correct items for customers. Over the many years, we have learned, invested, and grown. These days, we have superb engineer & RD staff specifically on drawings, entire line of devices and stringent top quality-control method to make our task precise and qualified.

*Even now provide trailer components for abroad marketplaces.
*We provide flexible metallic fabrication capabilities with products for simple to complex work in modest or large portions.
*We do multiple inspections just before loading container, compliant with ISO9001-2015 standards.
*Rich encounter in trailer chassis, steel frame, road traffic equipment OEM, aluminum box and other custom-made assignments.

Our manufacturing unit is located close to to ZheJiang . Gratification from customers is the motivation for us keeping work. Welcome your pay a visit to and hunting forward to functioning with you!

R&D and QC Teams


As a foreign cooperative manufacturing facility, sturdy complex study and growth capabilities and good quality inspection are our 2 main benefits.

one. Finding out the drawings meticulously, and striving to reduce the tolerance of the goods.
2. Putting ahead realistic tips for clients to assist them decrease the charges, in accordance to the true production and assembly.
three. Good quality control is carried out in every single step of manufacturing, and individual responsibility system is applied to ensure that there are no faulty goods.

* We have ISO9001:2015 top quality administration program.
* Our manufacturing facility has been audited and accepted by AWS.
* Our objective is to supply benefit-included merchandise for our consumers.

Production Potential


As a factory, Zhuoyue Metallic Goods Co., Ltd. is outfitted with Laser-cutting Equipment, CNC Bending Equipment, CNC Milling Devices, and Welding Robots to satisfy the requirements of reducing the tolerance. In addition, we have potent R&D and QC teams, and also professional welders, seasoned polished workers and assemblers.





Production Approach


Powder Coated Treatmen                            Zinc Plated Treatment                           Hot-dipped Galvanization

Consumer Images







Packaging & Cargo


1. In accordance to the quantity of the order, we will decide on the acceptable packing method.
two. All the supplies comply with export transportation standards.
three. Striving to preserve the price for buyers on the premise of guaranteeing transportation security.



one. Are you a investing organization or company?
We are a steel fabrication manufacturing facility largely manufacturing trailer chassis body and OEM trailer equipment, and also a buying and selling business providing rubber mats for Japanese market.
2. What is your sample plan?
We can source the sample according to your paper. Usually, for the common kind, the sample is cost-free of demand even though the FREIGHT Accumulate. For the OEM sample, the sample expense will be refunded soon after the order confirmation.
three. What is your time period of payment?
T/T thirty% as deposit, and 70% just before shipping. We will present you the pictures of the merchandise and packages just before you pay out the equilibrium.
4. What is your term of shipping and delivery?
5. How long is your supply time?
Generally, it is 5-ten times if the goods are in stock, or it is about 15-thirty times. The particular shipping and delivery time is dependent on the
objects and the amount of your buy.
6. What is your phrase of packing?
Generally, we pack little goods in cartons, and in metal pallet for huge components. We can pack the goods in your branded boxes right after getting your authorization letters.
7. Do you test all your items prior to shipping?
Of course, we have one hundred% examination just before shipping and delivery. You can receive goods with the factory inspection report.
8. How do you make our organization lengthy-expression and very good relationship?
We respect every client, and hold good top quality and aggressive price tag to ensure our customers’ rewards.

Types of Splines

There are four types of splines: Involute, Parallel key, helical, and ball. Learn about their characteristics. And, if you’re not sure what they are, you can always request a quotation. These splines are commonly used for building special machinery, repair jobs, and other applications. The CZPT Manufacturing Company manufactures these shafts. It is a specialty manufacturer and we welcome your business.

Involute splines

The involute spline provides a more rigid and durable structure, and is available in a variety of diameters and spline counts. Generally, steel, carbon steel, or titanium are used as raw materials. Other materials, such as carbon fiber, may be suitable. However, titanium can be difficult to produce, so some manufacturers make splines using other constituents.
When splines are used in shafts, they prevent parts from separating during operation. These features make them an ideal choice for securing mechanical assemblies. Splines with inward-curving grooves do not have sharp corners and are therefore less likely to break or separate while they are in operation. These properties help them to withstand high-speed operations, such as braking, accelerating, and reversing.
A male spline is fitted with an externally-oriented face, and a female spline is inserted through the center. The teeth of the male spline typically have chamfered tips to provide clearance with the transition area. The radii and width of the teeth of a male spline are typically larger than those of a female spline. These specifications are specified in ANSI or DIN design manuals.
The effective tooth thickness of a spline depends on the involute profile error and the lead error. Also, the spacing of the spline teeth and keyways can affect the effective tooth thickness. Involute splines in a splined shaft are designed so that at least 25 percent of the spline teeth engage during coupling, which results in a uniform distribution of load and wear on the spline.

Parallel key splines

A parallel splined shaft has a helix of equal-sized grooves around its circumference. These grooves are generally parallel or involute. Splines minimize stress concentrations in stationary joints and allow linear and rotary motion. Splines may be cut or cold-rolled. Cold-rolled splines have more strength than cut spines and are often used in applications that require high strength, accuracy, and a smooth surface.
A parallel key splined shaft features grooves and keys that are parallel to the axis of the shaft. This design is best suited for applications where load bearing is a primary concern and a smooth motion is needed. A parallel key splined shaft can be made from alloy steels, which are iron-based alloys that may also contain chromium, nickel, molybdenum, copper, or other alloying materials.
A splined shaft can be used to transmit torque and provide anti-rotation when operating as a linear guide. These shafts have square profiles that match up with grooves in a mating piece and transmit torque and rotation. They can also be easily changed in length, and are commonly used in aerospace. Its reliability and fatigue life make it an excellent choice for many applications.
The main difference between a parallel key splined shaft and a keyed shaft is that the former offers more flexibility. They lack slots, which reduce torque-transmitting capacity. Splines offer equal load distribution along the gear teeth, which translates into a longer fatigue life for the shaft. In agricultural applications, shaft life is essential. Agricultural equipment, for example, requires the ability to function at high speeds for extended periods of time.

Involute helical splines

Involute splines are a common design for splined shafts. They are the most commonly used type of splined shaft and feature equal spacing among their teeth. The teeth of this design are also shorter than those of the parallel spline shaft, reducing stress concentration. These splines can be used to transmit power to floating or permanently fixed gears, and reduce stress concentrations in the stationary joint. Involute splines are the most common type of splined shaft, and are widely used for a variety of applications in automotive, machine tools, and more.
Involute helical spline shafts are ideal for applications involving axial motion and rotation. They allow for face coupling engagement and disengagement. This design also allows for a larger diameter than a parallel spline shaft. The result is a highly efficient gearbox. Besides being durable, splines can also be used for other applications involving torque and energy transfer.
A new statistical model can be used to determine the number of teeth that engage for a given load. These splines are characterized by a tight fit at the major diameters, thereby transferring concentricity from the shaft to the female spline. A male spline has chamfered tips for clearance with the transition area. ANSI and DIN design manuals specify the different classes of fit.
The design of involute helical splines is similar to that of gears, and their ridges or teeth are matched with the corresponding grooves in a mating piece. It enables torque and rotation to be transferred to a mate piece while maintaining alignment of the two components. Different types of splines are used in different applications. Different splines can have different levels of tooth height.

Involute ball splines

When splines are used, they allow the shaft and hub to engage evenly over the shaft’s entire circumference. Because the teeth are evenly spaced, the load that they can transfer is uniform and their position is always the same regardless of shaft length. Whether the shaft is used to transmit torque or to transmit power, splines are a great choice. They provide maximum strength and allow for linear or rotary motion.
There are three basic types of splines: helical, crown, and ball. Crown splines feature equally spaced grooves. Crown splines feature involute sides and parallel sides. Helical splines use involute teeth and are often used in small diameter shafts. Ball splines contain a ball bearing inside the splined shaft to facilitate rotary motion and minimize stress concentration in stationary joints.
The two types of splines are classified under the ANSI classes of fit. Fillet root splines have teeth that mesh along the longitudinal axis of rotation. Flat root splines have similar teeth, but are intended to optimize strength for short-term use. Both types of splines are important for ensuring the shaft aligns properly and is not misaligned.
The friction coefficient of the hub is a complex process. When the hub is off-center, the center moves in predictable but irregular motion. Moreover, when the shaft is centered, the center may oscillate between being centered and being off-center. To compensate for this, the torque must be adequate to keep the shaft in its axis during all rotation angles. While straight-sided splines provide similar centering, they have lower misalignment load factors.

Keyed shafts

Essentially, splined shafts have teeth or ridges that fit together to transfer torque. Because splines are not as tall as involute gears, they offer uniform torque transfer. Additionally, they provide the opportunity for torque and rotational changes and improve wear resistance. In addition to their durability, splined shafts are popular in the aerospace industry and provide increased reliability and fatigue life.
Keyed shafts are available in different materials, lengths, and diameters. When used in high-power drive applications, they offer higher torque and rotational speeds. The higher torque they produce helps them deliver power to the gearbox. However, they are not as durable as splined shafts, which is why the latter is usually preferred in these applications. And while they’re more expensive, they’re equally effective when it comes to torque delivery.
Parallel keyed shafts have separate profiles and ridges and are used in applications requiring accuracy and precision. Keyed shafts with rolled splines are 35% stronger than cut splines and are used where precision is essential. These splines also have a smooth finish, which can make them a good choice for precision applications. They also work well with gears and other mechanical systems that require accurate torque transfer.
Carbon steel is another material used for splined shafts. Carbon steel is known for its malleability, and its shallow carbon content helps create reliable motion. However, if you’re looking for something more durable, consider ferrous steel. This type contains metals such as nickel, chromium, and molybdenum. And it’s important to remember that carbon steel is not the only material to consider.