Tag Archives: gearbox extruder

China Co Rotating Twin Screw Extruder Gearbox For Extrusion Machine differential gearbox

Relevant Industries: Manufacturing Plant
Gearing Arrangement: Helical
Output Torque: 2*176
Enter Velocity: 1500
Output Speed: five hundred
Bearings: NSK, SKF, and so forth brand name
Reduction radio: 3:1
Lube oil pump: Tube type
Gear: 20CrNi2MoA or 20CrMnMo
Skeleton oil seal: ZheJiang hansheng and many others Well-known brand
Warranty: 1 yr
Bundle: Picket scenario
Coloration: Customise
Item identify: Gear Box
Certification: CE
Packaging Specifics: wooden scenario packing
Port: ZheJiang Port

Co Rotating Twin Screw Extruder Gearbox For Extrusion Machine
Solution Parameters

Model Screw Main Diameter (D/mm) Screw Slight Diameter(d/mm) D/d Middle distance(mm)
KTE-twenty 21.7 14 one.fifty five 18
KTE-25 twenty five 16.one one.fifty five 21.two
KTE-35 35.6 23.six 1.51 thirty
KTE-fifty 50.five 32.five one.fifty five forty two
KTE-52 51.4 33.eight 1.fifty two forty three
KTE-60 fifty nine.six 43.five 1.37 fifty two
KTE-65 sixty two.four 40.4 1.fifty four 52
KTE-sixty eight sixty nine 49 one.four 60
KTE-70 70.6 47.4 one.49 sixty
KTE-seventy five seventy one 47 1.fifty one 60
KTE-ninety five ninety three sixty one 1.51 78

Organization Profile

Packaging Delivery
A:The place is our manufacturing unit?We are in No.eleven,boai street,lukou avenue, Best Sponsor Listing Bellow Coulings Versatile Couplings Servo Motor Coupling Shaft Coupling Stainless Metal 30-320 Nm Sharpening jiangning district,HangZhou city,ZheJiang porvince,chinaB:How to get to our manufacturing facility?(1)You can get to the lukou airport straight,then, ARA Collection Aluminium Helical Bevel Planetary Velocity Reducer Transmission Gearboxes connecting us and we will choose you up by auto(2)You can get the teach to HangZhou south station,then,getting the subway to get to xingyulunan station,we will select you up by automobileC:Why select us?(1)We have total method of planning of extrusion products(2)We can privide thre ideal extrusion administration solutions and extrusion equipment(3)We could make you in a foremost place in the sectorD:What’s the payment method?L/C,T/T, 7 to 1 ratio gearbox in helical chopping gears Western unionE:Can you see the operating equipment in our factory?Sure.Prior to creating your choice buying the tools or not,you can bringsome substance listed here to test-operate the gearF:How extended of the guarantee time?Our warranty period is 1 year
Contact Us

What Is a Gearbox?

A gearbox is the mechanical system of an automobile that allows a vehicle to change gear smoothly. This arrangement of gears is highly complex, which helps to provide a smooth gear change. In this article, we will explore some of the different types of gearboxes, including the Epicyclic gearbox, the Coaxial helical gearbox, and the Extruder helical gearing. These are three of the most common types of gearboxes used in automobiles.


Gearboxes help drivers choose the appropriate gear for the conditions. A lower gear produces the least speed, while a higher gear gives the maximum torque. The number of gears used in a gearbox varies to meet different demands on the road and load. Short gearing provides maximum torque, while tall gearing offers higher top speeds. These features combine to improve the driveability of a vehicle. But what is a gearbox?
The gearbox has a slew of components, including the bearings and seals. Among these components is the gearbox, which is subjected to wear and tear due to metal-to-metal contact. As a result, gearboxes require close monitoring. Various tests are used to assess the condition of gears, such as corrosion and wear. Proactive tests emphasize wear, contamination, and oil condition. However, there are also proactive tests, such as the ferrous density test and the AN test, which monitor additive depletion and abnormal wear.
The separating force is a key factor for the design of a gearbox. The primary radial measurement point should be oriented to monitor normal forces. The secondary measurement point should be located in the opposite direction of rotation from the primary radial measurement point. The separating force generated by a helical gear set is called tangential force. The primary and secondary radial measurement points should be positioned so as to provide information about both normal and tangential forces.
Manual gearboxes are often manual. The driver can control the synchromesh by using a selector rod. This rod moves the synchromesh to engage the gear. Reverse gears are not synchromesh because they are used only when the vehicle is at a standstill. In older cars, the first gear often lacked synchromesh due to cost or lack of torque. Drivers could still use first gear with a double-declutch.

Coaxial helical gearbox

The R series rigid tooth flank helical gearbox features high versatility and good combination. They have a wide range of motor power and allow for fine classification of transmission ratios. The R series gearbox has several advantages, including high efficiency, long service life, and low vibration. This series of gearbox can be combined with a wide range of reducers and variators. Its size and high performance makes it an ideal choice for applications that require maximum torque and load transfer.
The main feature of a helical gearbox is that it presents a fixed velocity ratio, even if the center gaps are not perfectly set. This is sometimes referred to as the fundamental rule of gearing. A helical gearbox is similar to paper spur gears in terms of radial pitch, since the shafts in the helical gearbox cross at an angle. The center gap of a helical gearbox is the same for both the left and right-handed counterparts.
The EP Series is another popular model of a Coaxial helical gearbox. This series has high torque and a maximum reduction ratio of 25.6:1. It is an ideal choice for the plastic industry, and CZPT offers an extensive range of models. Their center distance ranges from 112 mm to 450 mm. The EP Series has several models with different center distances. In addition to high torque and efficiency, this gearbox has low noise and vibration, and it is easy to assemble and disassemble.
Another type of Coaxial helical gearboxes is the planetary gearbox. They have a high efficiency and power density. Unlike coaxial helical gearboxes, planetary gearboxes have an axis on the same direction as the output shaft. They are easy to integrate into existing drive trains. In addition, they are compact and easy to integrate with existing drive trains. For servo applications, they are another great choice.

Epicyclic gearbox

An epicyclic gearbox is a type of automatic gearbox used to drive cars. Its primary advantage is its compact design, and it is more reliable and efficient than manual gearboxes. It is comprised of a sun gear and two planetary gears, encased in a ring gear called the Annulus. This system is useful for drivers who need to shift gears frequently, as they will become tired if the gears are suddenly changed.
An epicyclic gearbox consists of three different types of gears: ring gear, sun gear, and annular ring gear. The ring gear is the outermost gear and has angular-cut teeth on its inner surface. It is used in conjunction with planetary gears to provide high-speed ratios to vehicles. The sun gear also reverses the direction of the output shaft. This helps reduce transmission error.
An epicyclic gearbox uses multiple planets to transfer power between the planets. This type of gearbox is lightweight and features a high power density. This gearbox has several benefits over a standard single-stage parallel axis gearbox, including multiple load paths, unequal load sharing, and phased meshing. Furthermore, epicyclic gearboxes require more complex transmission error optimisation than their counterparts, including more than one stage.
The objective of epicyclic gearbox research is to provide the lowest transmission error possible. The process includes an initial design and detailed specification. The system is defined by its load spectrum and required ratio. Deflections of the elastic mesh are calculated to understand their strength and how much energy the system can handle. Finally, micro-geometric corrections minimize transmission error. These improvements are crucial to the overall efficiency of an epicyclic gearbox.

Extruder helical gearing

The helix in an extruder helical gearing is fixed at an angle, enabling more interaction with the shaft in the same direction as it moves. As a result, the shaft and the bearing are in constant contact for a long period of time. Typically, extruder helical gearing is used in applications where there is low excitement, such as steel, rolling mills, conveyors, and the oil industry. The bevel gear train also plays a role in these applications.
The CZPT AEX extruder drive gear is specifically developed for this specific application. The gears are compact and lightweight and offer exceptional power density and a long service life. These extruder gears are highly reliable, and they can be used in a wide range of applications, including rubber processing, food production, and recycling plants. CZPT offers both standard and custom gearing for your extruder.
Another advantage of helical gearing is its versatility. Since the helical gearing teeth are inclined at a specific angle, they can be adjusted to meet the specific needs of a given application. These gears also have the advantage of eliminating noise and shock from straight teeth. Unlike other gearing types, they are able to achieve a wide range of loads, from small to large. These helical gears are very durable and are the best option for high-load applications.
In addition to this, asymmetric helical gears have increased flexibility, while asymmetrical helical gears have lower flexural stiffness. The ratio of teeth to the shaft has a positive effect on the strength of the gear. Furthermore, asymmetrical helical gears are easier to manufacture. But before you purchase your next extruder gear, make sure you know what you’re getting into.

1 speed gearbox

CZPT Group Components produces the one speed gearbox. It has the potential to make cars more efficient and environmentally friendly. The gear ratio of a car’s drivetrain is crucial for reaching maximum power and speed. Typically, a one-speed gearbox delivers a maximum of 200 hp. But the speed at which a car can reach this power must be high to get the full benefit from the electric motor. So, how can a one-speed gearbox improve the speed and torque of a car?
A one-speed gearbox is a mechanical device used to switch between second and third gears. It can include multiple gear sets, such as a shared middle gear for switching between second and third gears. It can also have an intermediate gear set that represents a switchable gear in both partial transmissions. The invention also includes a mechanism that makes it easier to change gears. The patent claims are detailed below. A typical one-speed gearbox may include two parts.
Generally, a one-speed gearbox will have up to seven forward gears, with each of these corresponding to a different speed. A one-speed gearbox can have five different gear sets and five different gear levels. It can have synchronized gear sets or last-shelf gear sets. In either case, the gears are arranged in a way that maximizes their efficiency. If the gears are placed on opposite sides of a car, the transmission may be a two-speed one.
CZPT Transmission specializes in the production of high-speed gearboxes. The company’s Milltronics HBM110XT gearbox machine is the perfect tool for this job. This machine has a large working table and a heavy-duty load capacity, making it a versatile option for many kinds of applications. There are also a wide variety of CZPT gearboxes for the automotive industry.

China Co Rotating Twin Screw Extruder Gearbox For Extrusion Machine     differential gearbox	China Co Rotating Twin Screw Extruder Gearbox For Extrusion Machine     differential gearbox
editor by czh2023-02-17

China Hardened Tooth Surface Extruder Three-Step for Machinery Helical Gear Box with Good Price electric motor helical gearbox

Product Description

Hardened Tooth Area Extruder Three-Phase for Machinery helical gear box with Excellent Price

Transient Introduction         .

one. CZPT sequence reduction gearbox is a transmission portion that possesses substantial precision

difficult gear surface area and thrust  block created for plastic screw extruder. 

two.The design of product adapts all kinds of norm specified in ZBJ19009-88/it attributes

that equipment and axis elements are produced of high strength alloy steel.                                     

3.The gear is processes by carburization, quenching and tooth grinding process. 

4.The precision of gear is grade 6 specified in GB1009588.

five.The hardness of gear surface is HRC54~sixty two. At front end of hollow input axis 

there is large specification thrust bearing that will bear axial thrust force while 

the screw is working.

6.The complete machine features compact, high in bearing capacity, stable in 

transmission, low noise, high efficiency, etc.

Applicable scope
       Various plastic rubber market

  • The input rotation of primary mover shall be ≤1500rpm
  • The peripheral speed of equipment generate shall be≤20m/s
  • The operating ambient temperature shall be inside -40°C~45°C. Per heat the lubricating oil to over 0°C when the ambient temperature is under 0°C.
  • Rotation is accessible equally forwards and backwards.

Technical parameters


Top quality Control
High quality:Insist on Improvement,Try for CZPT With the growth of tools production indurstry,buyer never satirsfy with the recent quality of our goods,on the opposite,wcreate the value of top quality.
Quality plan:to enhance the general amount in the discipline of electricity transmission  
High quality See:Ongoing Improvement , pursuit of excellence
Quality Philosophy:Top quality generates benefit

three. Incoming Good quality Management
To build the AQL acceptable level of incoming materials handle, to supply the content for the entire inspection, sampling, immunity. On the acceptance of qualified products to warehousing, substandard products to get return, check out, rework, rework inspection dependable for monitoring bad, to check the provider to take corrective steps to avoid recurrence.

four. Approach High quality Manage
The manufacturing web site of the 1st assessment, inspection and ultimate inspection, sampling in accordance to the specifications of some tasks, judging the good quality alter craze found irregular phenomenon of production, and supervise the creation office to improve, get rid of the abnormal phenomenon or condition

five. FQC(Closing QC)
Following the production section will total the product, stand in the customer’s placement on the concluded product good quality verification, in order to make certain the top quality of client anticipations and demands.

6. OQC(Outgoing QC)
Soon after the product sample inspection to determine the certified, making it possible for storage, but when the finished item from the warehouse prior to the formal shipping of the items, there is a check out, this is known as the shipment inspection.Check out content:In the warehouse storage and transfer status to verify, even though confirming the shipping and delivery of the solution is a solution inspection to establish the certified




1. How to choose a gearbox which fulfills our prerequisite?

You can refer to our catalogue to decide on the gearbox or we can assist to pick when you supply

the technical data of essential output torque, output speed and motor parameter and so forth.


2. What information shall we give ahead of putting a obtain get?

a) Sort of the gearbox, ratio, enter and output variety, input flange, mounting position, and motor informationetc.

b) Housing color.

c) Obtain quantity.

d) Other particular demands.


3. What industries are your gearboxes becoming used?

Our gearboxes are broadly employed in the locations of textile, foodstuff processing, beverage, chemical market,

escalator,computerized storage equipment, metallurgy, tabacco, environmental protection, logistics and and so forth.


4. Doyou promote motors?

We have stable motor suppliers who have been coperating with us for a long-time. They can supply motors

with higher quality.  


US $199-3,000
/ Piece
1 Piece

(Min. Order)


Application: Machinery
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Layout: Coaxial
Gear Shape: Conical – Cylindrical Gear
Step: Three-Step


US $199-3,000
/ Piece
1 Piece

(Min. Order)


Application: Machinery
Hardness: Hardened Tooth Surface
Installation: Horizontal Type
Layout: Coaxial
Gear Shape: Conical – Cylindrical Gear
Step: Three-Step



Helical Gearbox

Using a helical gearbox can greatly improve the accuracy of a machine and reduce the effects of vibration and shaft axis impact. A gearbox is a circular machine part that has teeth that mesh with other teeth. The teeth are cut or inserted and are designed to transmit speed and torque.helical gearbox


Among the many types of gearboxes, the helical gearbox is the most commonly used gearbox. This is because the helical gearbox has a sliding contact. The contact between two gear teeth begins at the beginning of one tooth and progresses to line contact as the gear rotates.
Helical gears are cylindrical gears with teeth cut at an angle to the axis. This angle enables helical gears to capture the velocity reversal at the pitch line due to the sliding friction. This leads to a much smoother motion and less wear. Moreover, the helical gearbox is more durable and quieter than other gearboxes.
Helical gears are divided into two categories. The first group comprises of crossed-axis helical gears, commonly used in automobile engine distributor/oil pump shafts. The second group comprises of zero-helix-angle gears, which do not produce axial forces. However, they do create heat, which causes loss of efficiency.
The helical gearbox configuration is often confounded, which results in higher working costs. In addition, the helical gearbox configuration does not have the same torque/$ ratio as zero-helix angle planetary gears.
When designing gears, it is important to consider the effects of gear sliding. Sliding can lead to friction, which can cause loss of power transmission. It also leads to uneven load distribution, which decreases the loadability of the helical planetary gearbox.
In addition, the mesh stiffness of helical gears is commonly ignored by researchers. An analytical model for the mesh stiffness of helical gears has been proposed.

Axial thrust forces

Several options are available for axial thrust forces in helical gearboxes. The most obvious is to use a double helical gear to offset the force component. Another option is to use a thrust bearing with a lower load carrying capacity. This becomes a sacrificial component.
In order to transmit a force, it must be distributed along the contact line. This force is the sum of tangential, radial and axial force components. All these components must be transferred from the source to the output. This is a complex process that involves the use of gears.
The axial force component must be transferred through the gears. The resultant force is then divided into orthogonal components and divided into the thrust directions. The radial force component is from the contact point to the driven gear center.
The axial force component is also determined by the size of the gear’s pitch diameter. A larger pitch diameter results in a greater bearing moment. Similarly, a larger gear ratio will produce a higher torque transmission.
It should be noted that the axial force component is only a small part of the total force. The normal force is distributed along the contact line.
The double helical gear is also not a perfect duplicate of the herringbone gear. It has two equal halves. It is used interchangeably with the herringbone gear. It also has the same helix angle.helical gearbox

Reduced impact on the shaft axis

Increasing the helix angle of a gear pair will reduce resonance effects on the shaft axis of a helical gearbox. However, this will not reduce the overall vibration in the gearbox. In fact, it will increase the vibration. This can lead to serious fatigue faults in the drive train.
This is because the helix angle has an effect on the contact line between two teeth. As the helix angle increases, the length of the contact line decreases. In addition, it has an effect on the normal force and curvature radii of the teeth. The pressure angle also affects the curvature radii.
Helical gears have several advantages over spur gears. These advantages include: lower vibration, NVH (noise, vibration and harshness) characteristics, and smooth operation under heavy loads. They also have better torque capability. However, they produce higher friction. They also require unique approaches to control their thrust forces.
The first step in reducing resonance effects is to regulate the meshing frequency of the helical gear stage. This can be done by varying the shift factors in the gear. If the shift factors are too large, then the gear will experience resonance effects. The helix angle is also affected by the gear’s shift factors. It is therefore important to control the gear’s geometry in order to reduce the resonance effects.
Next, the effects of the web structure and rim thickness on the root stress of the gear are examined. These are measured by strain gage. The results indicate that the maximum root stress is obtained when the worst meshing position is reached.

Quieter operation

Compared to spur gears, helical gears are much quieter in operation. This is due to their larger teeth. Aside from this, they have a higher load-carrying capacity. They also run smoother and have a higher speed capability. Helical gears are also a good substitute for spur gears.
The most significant parameter relating to noise reduction is the gear contact ratio. It ranges from below 1 to more than 10 and is determined by the number of teeth intersecting a parallel shaft line at the pith circle. It is also a good indicator of the level of noise reduction that helical gears provide.
In addition, helical gears have a lower impulse flexure than spur gears. This is because the contact point slides along the helical surface of each tooth. This also adds internal damping to the gear system.
While helical gears are less noisy than spur gears, they do have a high level of wear and tear. This can affect the performance of the gear. However, it is possible to improve the smoothness of the tooth surface by grinding. In addition, running the gears in oil can also help improve the smoothness of the tooth surface.
There are many industries that use helical gears. For example, the automotive industry uses them in their transmissions. They also are used in the agricultural industry. They are often used in heavy trucks.
Helical gears are also known to generate less heat and are quieter than other gears. They can also deliver parallel power transfers between parallel or non-parallel shafts.

Improved accuracy

Increasing the accuracy of a helical gearbox is the key to its operation and reliability. The accuracy of the gearbox is dependent on several features. Among the most important are the profile and lead. Moreover, the power requirements of a gear drive should be taken into consideration.
The profile is the most sensitive feature of a helical gear. If the profile is not symmetric, the gear will run with a noisy spur gear. In addition, the profile is also the most sensitive to lead.
A helical gearbox plays a key role in the power transmission of industrial applications. However, the heavy duty operating conditions make it susceptible to a variety of faults.
A helical gearbox’s performance depends on the accuracy of the individual gears. This is accomplished by minimizing the backlash. A common way to reduce backlash is to approach all target positions from a common direction. This approach also reduces transmission noise.
The accuracy of a helical gearbox can be improved by using a flexible electronic gearbox. This can reduce the degree of twist. Moreover, it can increase the accuracy of gear machining.
A helical gearbox with an electronic gearbox can increase the accuracy of twist compensation. It can also improve the linkage between B-axis, C-axis, and Z-axis. Moreover, the electronic gearbox will ensure the linkage relationship between Y-axis, Z-axis, and C-axis.
The accuracy of a helical Gearbox can be improved by calculating the position error of the gear train. Pitch deviation and helix angle deviation are two types of position error.helical gearbox

Reduced vibration

Using helical gearboxes can reduce vibration and noise. These gears are used in a variety of applications, including automotive transmissions. Moreover, these gears are quiet enough to operate in noise-sensitive applications.
Using CZPT software, three different gearbox housing designs are compared. The external dimensions and mass of each design are kept constant, but different quantities of longitudinal and transverse stiffeners are employed. The resulting models are then compared to experimental results. In addition, the free vibration response of these models is analyzed. The results are shown in Fig. 5.
In terms of noise reduction, the cellular model produces the lowest sound pressure level. However, the cross model produces the higher sound level. The cellular model also produces better peak to peak results.
The input-stage gear pair is the power source of the output-stage gear pair. The output-stage gear pair’s vibration is also studied. This includes a phase diagram and a frequency-domain diagram. The influence of the driving torque and the pinion’s velocity on the vibration is studied in a numerical manner. The time evolution of the normal force and the lubricant stiffness is also studied.
The input-stage pinion modification reduces the input-stage gear pair’s vibration. This reduction is achieved by adding dual bearing support to the input shaft.
China Hardened Tooth Surface Extruder Three-Step for Machinery Helical Gear Box with Good Price     electric motor helical gearboxChina Hardened Tooth Surface Extruder Three-Step for Machinery Helical Gear Box with Good Price     electric motor helical gearbox
editor by czh 2022-12-31

China OEM Hard Tooth Surface Zlyj Screw Plastic Toy Extruder Gearbox Gear Unit near me shop

Product Description

Single Screw Parallel Shaft Reducer for Plastic Extruder (JHM/ ZLYJ/ ZSYJ)

PTT extruder gearboxes have 2 popular collection for 2 varieties screw extruders:
ZLYJ/ZSYJ Series Extruder Gear Units for Solitary Screw Extruders
SZ Sequence Extruder Gear Models for Conical Twin Screw Extruders
For parameters of SZ sequence gearbox and other extruder gearboxes applications, make sure you seek the advice of our product sales representatives and engineers.
1. Housing: Cast Iron or Metal Plate Welding
two. Gear Set: Hardened Helical Gear Pairs, Carburizing, Quenching, Grinding, Equipment Hardness HRC54-sixty two
three. Enter Configurations:
Keyed Sound Shaft Enter
4. Output Configurations:
Hollow Shaft Output
1. Substantial strength alloy steel gears and shafts, durable and wearable
two. Hollow output shaft built-in with sturdy thrust bearings to face up to axial pressure of the screw
three. Massive load capacity, outstanding functionality for screw extruders purposes
four. Higher performance, high reliability, long provider lifestyle, reduced sounds
5. CZPT global manufacturers of bearings and oil seals (ZheJiang NAK Oil Seals)

Plastic Extruders
Rubber Extruders
Single Screw Extruders (ZLYJ/ZSYJ Series Extruder Gearbox)
Conical Twin Screw Extruders (SZ Sequence Extruder Gearbox)
Set up:
Horizontal Mounted
Vertical Mounted
Oil Dip and Splash Lubrication
Compelled Lubrication (Additional Oil Pump)
Normal Cooling
Auxiliary CZPT Units

Q:Are you trading business or manufacturer?
A: We are maker with over 20 years’ expertise.

Q: How extended is your supply time?
A: Typically it is in 10 times if the items are in inventory, for merchandise created as for every buy, it is within 35 days following confirmation of get.

Q: How lengthy ought to I wait for the feedback after I send out the enquiry?
A: Typically within 12 hours.

Q: What information need to I give you to verify the solution?
A: Design/Size, Transmission Ratio, Speed, Shaft directions & Buy amount etc.

Q: Hong lengthy is your merchandise guarantee?
A: We offer you twelve months warranty from departure day of the products.

Q: What is your payment conditions? T/T 100% in CZPT for quantity considerably less than USD10000.-, 30% T/T in CZPT , equilibrium prior to shipment for amount above USD10000.

If you have any other questions, remember to feel free to contact us below:

HOW TO Speak to US?
Deliver your Inquiry Information in the Beneath, click on “Ship” Now!

EP’s racks change rotational motion to linear motion when utilised with spur gears. It is designed to work with our stock fourteen 1/2° and 20° PA spur gears. It can be modified for certain applications, this kind of as drilling and tapping mounting holes, chopping to specific lengths, or matching the finishes of two-piece racks to develop continuous lengths more time than inventory.
A rack is a part of a cylindrical disk with an infinite radius, the surface area of which is reduce with involute enamel. The racks are specifically mated to spur gears with the very same module, pressure angle, and desired encounter width. EP delivers racks in a range of supplies, configurations, modules, and lengths. A unique attribute of our racks is that most of them arrive with concluded goods. This sort of generation makes it possible for numerous racks to be linked conclude to conclude to make a ongoing length of racks. Many of our choices permit for secondary operations this kind of as shortening lengths, introducing threaded holes, or implementing heat treatment method. Our goods also include products that have completed some of these secondary operations.

China OEM Hard Tooth Surface Zlyj Screw Plastic Toy Extruder Gearbox Gear Unit     near me shop