Product Description

Detailed Parameters

 

Double Row Angular Contact Ball Bearing
Bearing No.			dxDxB (mm)			Weight(kg)
3310	3310 ZZ	3310 2RS	50	110	44.4	1.810

Ball Bearings and Applications

Ball Bearings:
1. Deep Groove Ball Bearing
2. Self-Aligning Ball Bearing
3. Angular Contact Ball Bearing
4. Thrust Ball Bearing

Applications:
1. Electric motors
2. Elevators
3. Conveyor systems
4. Agriculture industry
5. Steering applications
6. Industrial pumps and drive cars
7. Pulp and paper industry
8. Industrial gearboxes
9. Trucks, trailers and buses

Specifications of Angular Contact Ball Bearing

Double Row Angular Contact Ball Bearing
Bearing No.			dxDxB (mm)			Weight(kg)	Bearing No.			dxDxB (mm)			Weight(kg)
3200	3200 ZZ	3200 2RS	10	30	14.3	0.049
3201	3201 ZZ	3201 2RS	12	32	15.9	0.057
3202	3202 ZZ	3202 2RS	15	35	15.9	0.064	3302	3302 ZZ	3302 2RS	15	42	19	0.132
3203	3203 ZZ	3203 2RS	17	40	17.5	0.095	3303	3303 ZZ	3303 2RS	17	47	22.2	0.180
3204	3204 ZZ	3204 2RS	20	47	17.5	0.150	3304	3304 ZZ	3304 2RS	20	52	22.2	0.217
3205	3205 ZZ	3205 2RS	25	52	20.6	0.175	3305	3305 ZZ	3305 2RS	5	62	25.4	0.362
3206	3206 ZZ	3206 2RS	30	62	23.8	0.286	3306	3306 ZZ	3306 2RS	30	72	30.2	0.553
3207	3207 ZZ	3207 2RS	35	72	27	0.436	3307	3307 ZZ	3307 2RS	35	80	34.9	0.766
3208	3208 ZZ	3208 2RS	40	80	30.2	0.590	3308	3308 ZZ	3308 2RS	40	90	36.5	1.571
3209	3209 ZZ	3209 2RS	45	85	30.2	0.640	3309	3309 ZZ	3309 2RS	45	100	39.7	1.340
3210	3210 ZZ	3210 2RS	50	90	30.2	0.690	3310	3310 ZZ	3310 2RS	50	110	44.4	1.810
3211	3211 ZZ	3211 2RS	55	100	33.3	0.986	3311	3311 ZZ	3311 2RS	55	120	49.2	2.320
3212	3212 ZZ	3212 2RS	60	110	36.5	1.270	3312	3312 ZZ	3312 2RS	60	130	54	3.050
3213	3213 ZZ	3213 2RS	65	120	38.1	1.560	3313	3313 ZZ	3313 2RS	65	140	58.7	3.960
3214	3214 ZZ	3214 2RS	70	125	39.7	1.800	3314	3314 ZZ	3314 2RS	70	150	63.5	4.740
3215			75	130	41.3	2.100	3315			76	160	48.3	6.150
3216			80	140	44.4	2.650	3316			80	170	68.3	6.950
3217			85	150	49.2	3.400	3317			85	180	73	8.300
3218			90	160	52.4	4.150	3318			90	190	73	9.250
3219			95	170	55.6	5.000	3319			95	200	77.8	11.000
3220			100	180	60.3	6.100	3320			100	215	82.6	13.500
3222			110	200	69.8	8.800	3322			110	240	92.1	19.000

The Factory
The advantage ball bearing factory located in the bearing manufacturing center – HangZhou, China. There are 2 plants, 1 specialized in manufacturing common grade ball bearing, another 1 professional in EMQ bearing with stabilized Z3V3 quality, the factory takes her every effort in purchasing the most advanced bearing processes equipment, and NC automatic facilities are widely used in the factory and has become a bearing factory owning the most advanced processes equipment in China. The Granville own ball bearing factory division manufacturing a whole range of radial deep groove ball bearings, open – shield – sealed – chrome steel, and stainless steel available. 

 

Product Offering
Bore size	3mm and up
Closures	Open Non-contact metallic shields Non-contact seals Contact seals
Ring Material	52100 chrome steel 440C stainless steel 420C stainless steel
Seal Materiial	Nitrile, Polyacrylic
Retainer	Riveted steel Crimped steel Crowned steel Crowned nylon
Precision Class	ABEC-1, ABEC-3, ABEC-5, ABEC-7
Radial Clearance	C2, C0, C3, C4, C5
Heat Stabilization	S0, S1, S2, S3

Manufacturing Process
Granville, as a manufacturer of high-quality products, guarantees compliance with the highest standards relative to the use of the best steel quality in the production process, the highest standards in the design of contact surfaces, as well as the most efficient packing and lubrication of parts.

From material coming, quality control through all processes except internal test, goods to third party inspection if required. After the center of inspection and experiment is founded, effective methods of inspecting all kinds of row materials are mastered and then the reliability of bearings is ensured. 

One of our main objectives is the continued improvement in the quality of our products and processes, in pursuit of which we obtained ISO certification 9001:2008 and TS16949.

 

Quality Control

Advantage Manufacturing Processes and Quality Control
01	Heat Treatment
02	Centerless Gringing Machine 11200(most advanced)
03	Automatic Production Lines for Raceway
04	Automatic Production Lines for Raceway
05	Ultrasonic Cleaning of Rings
06	Automatic Assembly
07	Ultrasonic Cleaning of Bearings
08	Automatic Greasing,Seals Pressing
09	Measurement of Bearing Vibration(Acceleration)
10	Measurement of Bearing Vibration(speed)
11	Laser Marking
12	Automatic Packing

Packing & Shipping

Packing	1.Industrial exporting package
	2.Individual plastic / carton / pallet
	3.As the customer’s requirements
Delivery date	30-60 days for normal order

Company Profile

Granville group start in London and in order to adapt to the international market situation and enterprise development, Granville gradually oriented to global markets through resource integration, the Granville’s businesses are present across 5 continents. We operate in 4 industry clusters: Components for Industry and automotive; Machine tools and mechatronics; Energy and New Materials, and Healthcare.
 
Comprehensive product range:

— Bearings
— Oil seals, Transmission belt
— Chain and Sprocket
— Hub assembly & Wheel bearings
— Coupling, castings
— Linear motion

Values
— Behavior-based, service-oriented, focused on results and committed to continuous improvement

Focus
— supply chain management and customer service

Advantages
1. Advanced Automatic Lines
2. Comprehensive Range
3. Premium Quality
4. Sustainability

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.