Product Description

Angular Contact Ball Bearings QJ313Q1/S0 71905CTA QJF228M QJ1034N2Q1/S0 QJ314M 71906CTA QJF236M QJ1036M QJ315M/C9 71907CTA for High Frequency Electric Motor

Bearing Description

Introduction to angular contact ball bearing

1) Angular contact ball bearing is especially suitable to be subjected to the combination of radial and axial load compared with other types of ball bearings. The bigger the contact angle is, the higher axial load withstanding ability it has.

2) The high precision and high speed angular contact ball bearings usually adopts 15°angle.

3)The angular contact ball bearing could be divided into 2 types according to the quantity of roller rows, that are single row and double rows angular contact ball bearings.

4) Conventionally, there are 3 assembly ways for the angular contact bearings, back to back type(i.e 7000/DB) ,face to face type(i.e 70000DF) and series assembly type(i.e 70000/DT).

5) Applications such as lathe main axle, high frequency motor, food machinery,oil pump, fan and blower, and others are recommended to use the angular contact ball bearings, either single row or double rows type.

Bearing Specification

Specification for 7200/7300 series Single Row Angular Contact Ball Bearings

Single Row Angular Contact Ball Bearing						Single Row Angular Contact Ball Bearing(Sealed)
Boundary Dimension(mm)					Bearing No.	Basic load rating		Speed rating		Weight
d	D	B	B1	r(min)		dynamic(Cr)	static(Cor)	(grease)	(oil)	kg
10	30	9	0.6	0.3	7200B	4900	2480	15000	22000	0.03
10	30	9	0.6	0.3	7200B 2RS	4900	2480	15000		0.03
12	32	10	0.6	0.3	7201B	6200	2900	14500	20000	0.035
12	32	10	0.6	0.3	7201B 2RS	6200	2900	14500		0.035
12	37	12	0.6	0.3	7301B	8400	3500	13500	18700	0.06
15	35	11	0.6	0.3	7202B	7300	3700	13500	17800	0.043
15	35	11	0.6	0.3	7202B 2RS	7300	3700	13500		0.043
15	42	13	1	0.6	7302B	10500	5200	11900	16000	0.08
17	40	12	0.6	0.3	7203B	8700	4800	11900	16000	0.062
17	40	12	0.6	0.3	7203B 2RS	8700	4800	11900		0.062
17	47	14	1	0.6	7303B	12400	7040	11000	15000	0.11
17	47	14	1	0.6	7303B 2RS	12400	7040	11000		0.11
20	47	14	1	0.6	7204B	12000	6900	11000	15000	0.11
20	47	14	1	0.6	7204B 2RS	12000	6900	11000		0.11
20	52	15	1	0.6	7304B	15200	8400	9300	12700	0.14
20	52	15	1	0.6	7304B 2RS	15200	8400	9300		0.14
25	52	15	1	0.6	7205B	13900	8300	8000	11900	0.13
25	52	15	1	0.6	7205B 2RS	13900	8300	8000		0.13
25	62	17	1.1	0.6	7305B	23000	13300	7200	15710	0.3
25	62	17	1.1	0.6	7305B 2RS	23000	13300	7200		0.3
30	62	16	1	0.6	7206B	18000	12000	7200	15710	0.21
30	62	16	1	0.6	7206B 2RS	18000	12000	7200		0.21
30	72	19	1.1	0.6	7306B	27200	16800	6300	8500	0.37
35	72	17	1.1	0.6	7207B	23700	16500	6300	8500	0.3
35	80	21	1.5	0.6	7307B	33600	21500	5900	8000	0.51
40	80	18	1.1	0.6	7208B	30900	20600	5600	7600	0.39
40	90	23	1.5	0.6	7308B	40600	26800	5300	7200	0.67
45	85	19	1.1	0.6	7209B	31600	23000	5300	8100	0.44
45	100	25	1.5	0.6	7309B	52300	35000	5100	7200	0.9
50	90	20	1.1	0.6	7210B	33000	25500	4700	6300	0.49
50	110	27	2	0.6	7310B	60000	42200	4200	5600	1.15
55	100	21	1.5	0.6	7211B	40600	31600	4500	5900	0.65
55	120	29	2	1	7311B	69300	49700	3800	5100	1.45
60	110	22	1.5	0.6	7212B	49200	39100	4000	5300	0.84
65	120	23	1.5	0.6	7213B	55000	46800	3600	4700	1.05

Bearing Detailed Pictures

Angular Contact Ball Bearing 7014AC P6 Manufactured by CZPT Bearing

About ZheJiang CZPT Bearing

Guomai Bearing Factory Introduction

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 m²,7000 m² 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 OM 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.

Workshop

Guomai Featured Bearings

Featured Bearings

International Trade Show

Exhibition

Reasons to Choose Us ?

Reasons to choose CZPT Bearings as your Chinese Good Performance Angular Contact Ball Bearing partner

1. Bearing designing: Guomai 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.

Packaging & Shipping

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

Applications of Spline Couplings

A spline coupling is a highly effective means of connecting 2 or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.

Optimal design

The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.

Characteristics

An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is 1 of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.

Applications

Spline couplings are a type of mechanical joint that connects 2 rotating shafts. Its 2 parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on 1 side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.

Predictability

Spindle couplings are used in rotating machinery to connect 2 shafts. They are composed of 2 parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is 1 X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between 2 spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.