Reasons to Choose Us ?

——Why Choose Us?——
Reasons to choose CZPT Bearings as your auto bearings partner

1. Bearing designing: CZPT has our own bearing R&D team and adopts Germany technology. This enables us to provide OEM and ODM service to you.
2. Production process: We strictly follow the 5S production process and acquired ISO9001:2008 quality management system certificate. Besides, we introduced from abroad world famous brands lathes and heat treatment equipment, this enables us to provide high precision bearings with similar quality to world famous brands such as SK F,TIMKEN,NSK,NTN,KOYO,NACHI and so on.
3. Materials: To ensure the high quality of bearings, we use high carbon chrome bearing steel which provides high rigidity, and high resistance to CZPT wear to produce the bearings. Low carbon cold rolled steel and low carbon stainless steel is also used according to customers’ requirements.
4. Quality inspection: All bearings will be strictly tested before packing. We have CZPT talysurf, hardness meter,clearance detector,vibration(speed) measuring instrument,roundness instrument to guarantee all bearings are qualified with the standards.
5. Lubricants: Suitable lubricants are used to protect the bearings from oxidation or corrosion of parts thus enable our bearings with longer lifetime, low noise and better high temperature performance. Selection of lubricants is generally governed by the bearing application. Right choice of high quality lubricants could prevent metal to metal contact and conduct heat away from the bearings.
6. Packing: Guomai bearings pay attention to every detail in the bearing production process. We adopt plastic bag, Kraft paper, thick paper box and cartons to protect the bearings from unexpectable damage during the transportation and warehouse stock.
7. Factory direct marketing: We are the factory and not the distributor or trading agent, so we could provide the same quality with competitive price.

Workshop with Advanced Automatic Bearings Assembly Lines

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Exhibition

About ZheJiang CZPT Bearing

About Us–ZheJiang CZPT Bearings

ZheJiang CZPT Bearing Co.,Ltd(hereinafter referred to as Guomai) was established in 1999, with more than 20 years of bearing research and manufacturing experience. The factory covers an area of 16000 square meters,7000 of which is manufacturing area and the other is office and warehouse. CZPT has large stock for normally used bearing models and this enables us to deliver the bearing to customers within the shortest time.

There are total 160 staffs, 6 automatic bearing assembly lines,116 CNC machines and 22 sets of precise inspection instruments. We not only have our own R&D team but also cooperate with ZheJiang University of Science and Technology, HangZhou Bearing Research Institute to develop new bearing designing and manufacturing technology.

In addition to conventional bearings, CZPT also provides OEM and ODM service to our respectable customers to meet their individual requirements.We introduced advanced milling, turning machines, heat treatment equipment and bearing testing machines to guarantee the quality of the bearings because we know “Quality is the life of Guomai” .Now our top products include taper roller bearing, angular contact ball bearing, deep groove bearing ,spherical bearing and cylindrical roller bearing with P5, P4 accuracy grade.

After so many years of developing, CZPT has built up an excellent sales network within China. Our 2 bearing brands “CVZ” and “Bentu” are well known and have high reputation within the industrial equipment and components field. Moreover, with confidence of our bearing quality, we started to export our bearings 4 years ago. Customers from Europe, North America, Middle East, Southeast Asia and Africa have enjoyed the happiness our bearings brought to them.

Guomai Bearing always upholds “WIN-WIN” spirit and believes in “Details determine success” philosophy, and keep improving bearing quality in the past 20 years. Some series of our bearings have similar quality with SK F, NSK, Timken, NACHI, KOYO, CZPT and other world famous brands but with lower price.

Looking to the future, CZPT will insist on the technology innovation and processing levels to provide the most appropriate bearing products and service to our customers.

Bearing web page description and models may be limited, please contact us for more information.

Guomai Featured Bearings

Guomai’s Major Bearings

Packaging & Shipping

Guomai Bearings, Turn Together with the World and You!!!

DAC25525716 DAC25520037 DAC27600050 DAC28580042 DAC28610042 DAC30600037 DAC30600337 DAC30640042 DAC30630342 DAC30650571 DAC34620037 DAC34640034 DAC34640037 DAC34660037 DAC34680037 DAC34680042 DAC35640037 DAC35650035 DAC35660032 DAC35660033 DAC35660037 DAC35680037 DAC35685713/30 DAC35725718 DAC35720033 DAC35720034 DAC35725713/31 DAC3572571 DAC35720045 DAC35800045 DAC45830045 DAC45840039 DAC45840041/39 DAC458500302 DAC45850041 DAC47810053 DAC48890044/42 DAC49880046
 

How to tell if your driveshaft needs replacing

What is the cause of the unbalanced drive shaft? Unstable U-joint? Your car may make clicking noises while driving. If you can hear it from both sides, it might be time to hand it over to the mechanic. If you’re not sure, read on to learn more. Fortunately, there are many ways to tell if your driveshaft needs replacing.

unbalanced

An unbalanced driveshaft can be the source of strange noises and vibrations in your vehicle. To fix this problem, you should contact a professional. You can try a number of things to fix it, including welding and adjusting the weight. The following are the most common methods. In addition to the methods above, you can use standardized weights to balance the driveshaft. These standardized weights are attached to the shaft by welders.
An unbalanced drive shaft typically produces lateral vibrations per revolution. This type of vibration is usually caused by a damaged shaft, missing counterweights, or a foreign object stuck on the drive shaft. On the other hand, torsional vibrations occur twice per revolution, and they are caused by shaft phase shifts. Finally, critical speed vibration occurs when the RPM of the drive shaft exceeds its rated capacity. If you suspect a driveshaft problem, check the following:
Manually adjusting the imbalance of a drive shaft is not the easiest task. To avoid the difficulty of manual balancing, you can choose to use standardized weights. These weights are fixed on the outer circumference of the drive shaft. The operator can manually position the weight on the shaft with special tools, or use a robot. However, manual balancers have many disadvantages.

unstable

When the angular velocity of the output shaft is not constant, it is unstable. The angular velocity of the output shaft is 0.004 at ph = 29.5 and 1.9 at t = 1.9. The angular velocity of the intermediate shaft is not a problem. But when it’s unstable, the torque applied to it is too much for the machine. It might be a good idea to check the tension on the shaft.
An unstable drive shaft can cause a lot of noise and mechanical vibration. It can lead to premature shaft fatigue failure. CZPT studies the effect of shaft vibration on the rotor bearing system. They investigated the effect of flex coupling misalignment on the vibration of the rotor bearing system. They assume that the vibrational response has 2 components: x and y. However, this approach has limited application in many situations.
Experimental results show that the presence of cracks in the output shaft may mask the unbalanced excitation characteristics. For example, the presence of superharmonic peaks on the spectrum is characteristic of cracks. The presence of cracks in the output shaft masks unbalanced excitation characteristics that cannot be detected in the transient response of the input shaft. Figure 8 shows that the frequency of the rotor increases at critical speed and decreases as the shaft passes the natural frequency.

Unreliable

If you’re having trouble driving your car, chances are you’ve run into an unreliable driveshaft. This type of drivetrain can cause the wheels to stick or not turn at all, and also limit the overall control of the car. Whatever the reason, these issues should be resolved as soon as possible. Here are some symptoms to look for when diagnosing a driveshaft fault. Let’s take a closer look.
The first symptom you may notice is an unreliable drive shaft. You may feel vibrations, or hear noises under the vehicle. Depending on the cause, it could be a broken joint or a broken shaft. The good news is that driveshaft repairs are generally relatively inexpensive and take less time than a complete drivetrain replacement. If you’re not sure what to do, CZPT has a guide to replacing the U-connector.
One of the most common signs of an unreliable driveshaft is clanging and vibration. These sounds can be caused by worn bushings, loose U-joints, or damaged center bearings. This can cause severe vibration and noise. You can also feel these vibrations through the steering wheel or the floor. An unreliable driveshaft is a symptom of a bigger problem.

Unreliable U-joints

A car with an unreliable U-joint on the drive shaft can be dangerous. A bad u-joint can prevent the vehicle from driving properly and may even cause you trouble. Unreliable u-joints are cheap to replace and you should try getting parts from quality manufacturers. Unreliable U-joints can cause the car to vibrate in the chassis or gear lever. This is a sure sign that your car has been neglected in maintenance.
Replacing a U-joint is not a complicated task, but it requires special tools and a lot of elbow grease. If you don’t have the right tools, or you’re unfamiliar with mechanical terminology, it’s best to seek the help of a mechanic. A professional mechanic will be able to accurately assess the problem and propose an appropriate solution. But if you don’t feel confident enough, you can replace your own U-connector by following a few simple steps.
To ensure the vehicle’s driveshaft is not damaged, check the U-joint for wear and lubrication. If the U-joint is worn, the metal parts are likely to rub against each other, causing wear. The sooner a problem is diagnosed, the faster it can be resolved. Also, the longer you wait, the more you lose on repairs.

damaged drive shaft

The driveshaft is the part of the vehicle that connects the wheels. If the driveshaft is damaged, the wheels may stop turning and the vehicle may slow down or stop moving completely. It bears the weight of the car itself as well as the load on the road. So even a slight bend or break in the drive shaft can have dire consequences. Even a piece of loose metal can become a lethal missile if dropped from a vehicle.
If you hear a screeching noise or growl from your vehicle when shifting gears, your driveshaft may be damaged. When this happens, damage to the u-joint and excessive slack in the drive shaft can result. These conditions can further damage the drivetrain, including the front half. You should replace the driveshaft as soon as you notice any symptoms. After replacing the driveshaft, you can start looking for signs of wear.
A knocking sound is a sign of damage to the drive shaft. If you hear this sound while driving, it may be due to worn couplings, damaged propshaft bearings, or damaged U-joints. In some cases, the knocking noise can even be caused by a damaged U-joint. When this happens, you may need to replace the entire driveshaft, requiring a new one.

Maintenance fees

The cost of repairing a driveshaft varies widely, depending on the type and cause of the problem. A new driveshaft costs between $300 and $1,300, including labor. Repairing a damaged driveshaft can cost anywhere from $200 to $300, depending on the time required and the type of parts required. Symptoms of a damaged driveshaft include unresponsiveness, vibration, chassis noise and a stationary car.
The first thing to consider when estimating the cost of repairing a driveshaft is the type of vehicle you have. Some vehicles have more than one, and the parts used to make them may not be compatible with other cars. Even if the same car has 2 driveshafts, the damaged ones will cost more. Fortunately, many auto repair shops offer free quotes to repair damaged driveshafts, but be aware that such work can be complicated and expensive.