Variety: Roller, roller
Framework: cylindrical, cylindrical
Relevant Industries: Manufacturing Plant, Farms, Construction works , Vitality & Mining
Design Quantity: NNU4944 K/W33, NNU4944 K/W33
Precision Score: P0 P6 P5 P4 P2
Seals Type: Open up
Number of Row: Solitary row
Materials: Bearing Metal(GCr15),Chrome steel,Carburized
Certificate: ISO 9 loom Air conditioner compressor Unique bearings Deep groove ball bearing BV
H.S CODE:
Bore Measurement: 220mm
Outside Diameter: 300mm
Bundle: Box and carton bundle
Clearance: C0, C1, C2, C3, C4
Packaging Information: wood box carton box and pallet or as your request
Machine tools, rolling stands, plastic drums, grinders Particular use Super Precision Cylindrical Roller Bearings NNU4944 K/W33Technical data of NNU 4944 BK/SPW33Super precision, brass cage, 540 micro DC drill motor 12V automobile air pump vacuum cleaner motor 7.4V juice machine dc electric motor normal clearance, manufactured in Austria
ID: 220 mm
OD: 300 mm
Width: eighty mm
Weight: sixteen.5 kg
Standard dynamic load rating: 512 kN
Basic static load score: 1140 kN
Limiting pace for grease lubrication: 2400 rpm
Limiting pace for oil lubrication: 2800 rpm
Fatigue restrict load: 114 kN
Huge dimension NNU 4944 BK/SPW33 bearings have integral flanges on the outer ring but no flanges on the interior ring. As a result, the bearing can accommodate axial displacement of the shaft relative to the housing in the two directions. NNU 4944 BK/SPW33 super precision bearing has an annular groove and 3 lubrication holes in the outer ring
Component double row Cylindrical roller bearings catalogue
| BRG Part No. | ID mm | OD mm | Width mm | Wt. kg |
| NNU 4934 BK/SPW33 | 170 | 230 | 60 | 6,ninety five |
| NN 3034 K/SPW33 | 170 | 260 | sixty seven | 12 |
| NNU 4936 B/SPW33 | a hundred and eighty | 250 | sixty nine | ten,five |
| NNU 4936 BK/SPW33 | one hundred eighty | 250 | 69 | 10,5 |
| NN 3036 K/SPW33 | a hundred and eighty | 280 | 74 | sixteen |
| NNU 4938 B/SPW33 | one hundred ninety | 260 | 69 | 11 |
| NNU 4938 BK/SPW33 | a hundred ninety | 260 | 69 | 11 |
| NN 3038 K/SPW33 | 190 | 290 | 75 | seventeen |
| NNU 4940 B/SPW33 | 200 | 280 | 80 | fifteen |
| NNU 4940 BK/SPW33 | two hundred | 280 | 80 | fifteen |
| NN 3040 K/SPW33 | 200 | 310 | 82 | 21 |
| NNU 4944 BK/SPW33 | 220 | three hundred | 80 | 16,5 |
| NNU 4944 B/SPW33 | 220 | 300 | 80 | 16,5 |
| NN 3044 K/SPW33 | 220 | 340 | 90 | 27,five |
| NNU 4948 B/SPW33 | 240 | 320 | 80 | 17, DFN Manufacturer zz 2rs 6302 6305 deep groove ball bearings 5 |
| NNU 4948 BK/SPW33 | 240 | 320 | eighty | 17,5 |
| NN 3048 K/SPW33 | 240 | 360 | 92 | thirty,five |
| NNU 4952 BK/SPW33 | 260 | 360 | one hundred | thirty,five |
| NNU 4952 B/SPW33 | 260 | 360 | a hundred | 30,5 |
| NN 3052 K/SPW33 | 260 | four hundred | 104 | 44 |
| NNU 4956 B/SPW33 | 280 | 380 | a hundred | 32,five |
| NNU 4956 BK/SPW33 | 280 | 380 | 100 | 32,5 |
| NN 3056 K/SPW33 | 280 | 420 | 106 | forty seven,5 |
| NNU 4960 BK/SPW33 | 300 | 420 | 118 | 50 |
| NNU 4960 B/SPW33 | 300 | 420 | 118 | 50 |
| NN 3060 K/SPW33 | three hundred | 460 | 118 | sixty six,five |
| NNU 4964 B/SPW33 | 320 | 440 | 118 | fifty |
| NNU 4964 BK/SPW33 | 320 | 440 | 118 | fifty |
| NN 3064 K/SPW33 | 320 | 480 | 121 | seventy one |
| NNU 4968 BK/SPW33 | 340 | 460 | 118 | fifty six |
Types of Ball Bearings
If you’re looking to purchase a new ball bearing, there are many different types available. Learn about Single-row designs, Ceramic hybrid bearings, and Self-aligning ball bearings. You can also choose from stainless steel or single-row designs. Then, read about the different types of materials available to you. You’ll have an easier time making a decision. After all, you won’t have to worry about maintaining your new ball bearing, since it will be maintained by your supplier.
Single-row designs
Ball bearings with a single-row design have a high load-carrying capacity. They are used in applications where high loads must be handled smoothly. A single-row design is a good choice when the material’s properties require high load-carrying capacity but limited axial load capability. Single-row designs use two bearings with similar design features, but they have different mounting methods. Single-row designs can be adjusted either against one another to accommodate axial loads.
The single-row design is suitable for high-speed applications, but also has some disadvantages. The contact angle a is the angle between the radial plane and contact line. The larger the angle, the higher the axial load carrying capacity of the bearing. Single-row angular contact ball bearings are suitable for higher axial forces. Single-row angular contact ball bearings have a single-row design and support high axial forces in one direction. Single-row ball bearings are available in both pressed steel and machined steel cages.
Angular contact ball bearings with a single row feature a cage made of fiber-glass reinforced polyamide 66. These are available in diameters up to 130 mm. Four-point angular contact ball bearings use brass, steel, or brass plate. They have good running properties and a low coefficient of linear expansion. Single-row designs are easy to mount and are widely available. Alternatively, they can be mounted with a universal match design, which allows them to be easily adjusted.
One-row angular contact ball bearings are generally not suitable for angular misalignments because they are unsuitable for compensation of angular misalignments. Misalignments cause internal forces in the bearing which reduce its radial load capacity and life expectancy. This type of bearing is not suitable for adjacent mounting as it increases the chances of misalignment. However, it is a suitable choice for applications where only one bearing is required per bearing position.
Ceramic hybrid bearings
While all-ceramic bearings are limited to very specialized applications, Si3N4-based hybrid bearings are finding use in a wide range of high-speed machines. Compared to steel, ceramics are less susceptible to centrifugal forces, which are directly proportional to the mass of the balls. Because Si3N4 replacement balls have a lower density than steel, these bearings reduce the stress placed on the outer race.
The benefits of hybrid bearings are clear: they allow for higher speeds and loads than full-ceramic bearings, and they require no lubrication. Because of their many benefits, many industrial equipment operators are switching to these innovative bearings. CBR is one company that specializes in ceramic hybrid bearings and can help you find the best product for your application. If you are thinking about purchasing ceramic bearings for your next machine, here are some things you need to know about them.
A ceramic ball bearing surface has an extremely low coefficient of friction, which is important for applications that require low friction and high speeds. Ceramic balls also have a higher hardness than steel balls, which increases their life. In addition to this, ceramic hybrid bearings have superior thermal properties, generating less heat even when spinning at high speeds. These properties make ceramic hybrid bearings an ideal choice for high-speed machinery, especially electric motors. They are also suitable for applications that operate under water.
A ceramic ball hybrid bearing is much less susceptible to temperature fluctuations and wear. Because they are essentially indestructible, ceramic balls do not generate wear particles from the adhesive wear. They can run at significantly higher speeds than steel balls. Ceramic balls are also more resistant to moisture. For this reason, grease is a recommended lubricant in most ceramic bearing applications. These lubricants offer superior protection against moisture and corrosion. Further, they are available in many types.
Self-aligning ball bearings
A self-aligning ball bearing is one type of self-aligning bearing. These bearings are recommended for use in flex shaft systems. Their self-aligning feature prevents them from misaligning when in use. They can be used in both single and multiple-joint systems. In addition to self-aligning ball bearings, these units also feature flex shafts.
These self-aligning ball bearings come in a variety of configurations, including cylindrical, round, tapered, and straight bore. Their inner ring is tapered to meet specific tolerances. They are suitable for operating temperatures ranging from -30°F to 120°F. Their wide range of applications allows them to be used in general machinery, precision instruments, and low noise motors. In addition, they are available in a variety of outside diameters, widths, and internal clearances.
Self-aligning ball bearings have two rows of balls and one common sphered raceway in the outer ring. This enables them to automatically compensate for angular misalignment, which may be caused by machining and assembly errors or deflections. Compared to spherical roller bearings, these self-aligning ball bearings generate less friction. They run cooler even at high speeds. Self-aligning ball bearings also offer free engineering support.
Self-aligning ball bearings are designed for difficult shaft alignment. They are double-row, self-retaining units, with cylindrical or tapered bores. These bearings are available in open and sealed designs, and can also be used in applications with misalignment. They are also available with an outer ring that rotates in relation to the inner ring. When it comes to shaft misalignment, self-aligning ball bearings are a great solution.
Stainless steel
Stainless steel is a metal that resists corrosion and is highly durable. Its corrosion-resistant and water-resistance properties make it a good choice for bearings in food and marine applications. Additionally, stainless steel has hygienic benefits. Here are some of the benefits of stainless steel ball bearings. Read on to learn more about these amazing bearings! We’ve included some of the most common uses for stainless steel.
Hardness is important in a ball bearing. Steel uses the Rockwell C scale to measure hardness. A grade 25 steel ball bearing is accurate to 25 millionths of an inch, while a grade five ceramic bearing is less than a half-inch round. Although roundness is important, it shouldn’t be overemphasized, as the bearing surfaces may not be as accurate as the grade of the metal. And remember, a higher price tag doesn’t mean a better product.
Stainless steel ball bearings are available in a variety of alloys. The alloys used in manufacturing a stainless steel ball bearing vary in hardness, strength, and ductility. Stainless steel ball bearings have high corrosion-resistance properties. Additionally, they have long lubrication lives. These benefits make them a popular choice for industrial applications. These bearings are easy to maintain, reduce replacement costs, and offer corrosion resistance.
The NTN Sentinel Series is a premium line of stainless steel bearings. The solid lube is NSF H1 registered and prevents grease from leaching into food. It is also corrosion-resistant and doesn’t need to be coated. The seals and slinger create a water-resistant barrier between the steel ball and the lubricant. It also adds safety and security to the bearing.
Plastic balls
For applications where noise and weight are major concerns, plastic balls are ideal. These non-magnetic balls are ideal for MRI X-ray machines and sensors. They are also easy to lubricate, and are non-magnetic. A polymer ball bearing is the lightest of all three types. This makes them a good choice for many industries. Read on to learn more. This article will introduce some of the advantages of plastic balls for ball bearings.
Although ceramic ball bearings are more durable and offer many advantages, they are more expensive than plastic. Fortunately, plastic ball bearings offer a cheaper alternative. These bearings feature all-plastic races and cages. Depending on the application, plastic balls can be used in applications involving chemicals. In these cases, plastic ball bearings are available with a C160 grade, which is safe for use in temperatures below 176 deg F.
Medical devices often require precision specialty balls, which are made of glass, stainless steel, and plastic. These bearings must meet stringent cleanliness requirements. To meet the most stringent requirements, they must undergo ultrasonic cleaning. These bearings are available in plastic raceways, and are also available with glass or stainless steel balls. Polyethylene balls are lightweight and can be used in a variety of applications. They can be ordered in different sizes and tolerances to meet specific requirements.
Plastic balls for ball bearings are often mounted into other parts, such as plastic wheels, pulleys, and housings. They can be seamlessly integrated into other parts of a machine, which reduces assembly time and improves affordability. One important advantage of plastic bearings is that they are rust-resistant. As such, they can be used in harsh environments without causing any damage. If a piece of equipment is exposed to extreme temperatures, polymers are the ideal choice.
editor by czh 2023-02-19