China Custom CZPT Kt192317 Needle Roller Bearing 19mm Inner Diameter Bearings with Good quality

Product Description

NSK KT192317 Needle Roller Bearing 19mm Inner Diameter Bearings

Product Name 

NSK KT192317 Needle Roller Bearing 19mm Inner Diameter Bearings



Model Number


Ring Material

Gcr15/ Carbon Steel/ Stainless Steel

Cage Material 



P0, P6, P5, P4,P2 or as requested


ZV1, ZV2, ZV3, or as requested


C0,C2,C3, or as requested 


Widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery and printing machinery etc.


Long life, high temperature resistance, corrosion resistance, ultra high speed.

Quality standard

ISO9001:2000/ SGS

Quality Control Process 


2.Windage test


4.Rotary test

5.Greasing and gland

6.Noise inspection

7.Appearance inspection

8.Rust prevention

9.Product packaging

Needle bearing

Needle roller bearings are roller bearings with cylindrical rollers that are thin and long relative to their diameter. This type of roller is called a needle roller. Despite the small cross-section, the bearing still has a high load bearing capacity, and the needle bearing is equipped with a thin and long roller (roller diameter D≤5mm, L/D≥2.5, L is the roller length), so The radial structure is compact, its inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, and it is especially suitable for support structures with limited radial mounting dimensions.

Other Needle roller bearing models : 

Bearing Number Boundary dimensions(mm) Moment(Nm) Basic load ratings(N) Mass(g)
  Fw D C Md Cr Cor (Approx.)
HF3530 35 42 30 121 3900 3900 58
HF2520 25 32 20 66 5500 5500 30.9
HF3571 30 37 20 90 4500 4500 36
HF3520 35 42 20 121 3900 3900 40
HF1616 16 22 16 20.5 8500 7500 14
HF1816 18 24 16 24.1 7500 7500 15.5
HF2016 20 26 16 28.5 7000 6500 17
HF1012 10 14 12 5.3 14000 11000 4
HF1216 12 18 16 12.2 10000 7000 10.5
HF1416 14 20 16 17.3 9500 8000 13
HF0409 4 8 6 0.34 34000 14000 1
HF0612 6 10 12 1.76 23000 13000 3
Bearing Number Boundary dimensions(mm) Basic load ratings(N) Limiting speeds(rpm) Mass(g)
  Fw Ew Bc Cr Cor Oil (Approx.)
K5X8X10TN 5 8 10 2800 2450 37000 0.9
K5X8X8TN 5 8 8 2300 1880 37000 0.7
K6X10X13TN 6 10 13 3500 2800 33000 1.3
K6X9X10TN 6 9 10 3300 3100 35000 1
K6X9X8TN 6 9 8 25600 2240 35000 0.8
K7X10X10TN 7 10 10 3350 3400 32000 1.1
K7X10X8TN 7 10 8 2750 2550 32000 0.9
K8X11X10TN 8 11 10 3830 3950 30000 1.7
K8X11X13TN 8 11 13 5000 5700 30000 1.8
K8X11X8TN 8 11 8 3000 2900 30000 1.1
K8X12X10TN 8 12 10 4900 4600 30000 1.3
K9X12X10TN 9 12 10 4200 4700 30000 1.5
K9X12X13TN 9 12 13 5500 6700 30000 1.9
K10X13X10TN 10 13 10 4500 5250 27000 1.6
Bearing Number Boundary dimensions(mm) Basic load ratings(N) Limiting speeds(rpm) Mass(g)
  Fw D C Cr Cor Oil (Approx.)
NK5/10TN 5 10 10 2100 1400 36780 2.9
NK8/12TN 8 15 12 3050 3650 29112 8.3
NK10/12TN 10 17 12 4750 5350 23500 10
NK12/12 12 19 12 6050 6400 21640 11.8
NK12/16 12 19 16 8200 9800 21640 16.8
NK14/16 14 22 16 8260 9600 18322 20.8
NK15/12 15 23 12 8600 10070 21004 18.5
NK16/20 16 24 20 10400 16800 15522 23.9
NK16/16 16 24 16 9030 11900 15522 20.8
NK17/16 17 25 16 9000 13500 14163 21.5
NK18/20 18 26 20 10500 13800 13628 30.5
NK202620 20 26 20 10500 11900 9125 17.2
NK203312SX 20 33 12 13000 17500 11124 29.1
NK20/16 20 28 16 11500 13400 12716 25.7
NK20/20 20 28 20 12400 21800 12716 29.3
Bearing Number Boundary dimensions(mm) Basic load ratings(N) Limiting speeds(rpm) Mass(g)
  Fw D C Cr Cor Oil (Approx.)
RNAV4002 21.87 32 17 10800 29800 4500 45
RNAV4003 24.3 35 18 17900 37900 4300 62
RNAV4004 28.7 42 22 28150 60900 3900 114
RNAV4005 33.5 47 22 33800 70800 3700 129
RNAV4006 40.1 55 25 49900 96500 3500 193
RNAV4007 45.9 62 27 47600 122800 3100 259
RNAV4008 51.6 68 28 49900 137900 2700 304
RNAV4009 57.4 75 30 52500 153500 2600 390
RNAV4571 62.1 80 30 55700 166000 2500 426
RNAV4011 69.8 90 35 68500 225800 2300 645
RNAV4012 74.6 95 35 75400 239000 2100 677
RNAV4013 80.3 100 35 79500 256900 1900 692
RNAV4014 88 110 40 98800 354900 1700 950
RNAV4015 92.7 115 45 101800 372900 1600 1000
RNAV4016 100.3 125 45 157100 373500 1500 1400
RNAV4017 104.8 130 45 103800 374800 1400 1540
Bearing Number Boundary dimensions(mm) Basic load ratings(N) Limiting speeds(rpm) Mass(g)
  Dc1 Dc Dw Cr Cor Oil (Approx.)
AXK571TN  4 14 2 4380 7500 18000 0.7
AXK571TN 5 15 2 4680 9100 17000 0.8
AXK0821TN 8 21 2 7750 19000 15000 2
AXK1571 10 24 2 9150 24500 14000 3
AXK1226 12 26 2 9860 28600 13000 3
AXK1528 15 28 2 11200 35500 11000 4
AXK1730 17 30 2 11800 38600 10000 4
AXK2035 20 35 2 12900 45600 8500 5
AXK2542 25 42 2 13800 57800 7000 7
AXK3047 30 47 2 15600 69500 6000 8
AXK3552 35 52 2 16900 85710 5500 10
AXK4060 40 60 3 27500 113500 4700 16
AXK4565 45 65 3 29050 127600 4200 18





Q:Why choose us?                                                        

A:1. We are professional,have factory in ZheJiang for many years.

   2. We are experienced for 10 years.

   3. We can offer a various kind of bearing with high quality:Z1V1,Z2V2,Z3V3 and best price


Q:How is the quality of your products?                             

A:The same quality, we have lower price.The same price,we have better quality.


Q:Except Needle roller bearing,what other main bearing do you have?

A:Self-alaigning ball bearing,Cylindrical roller bearing,Taper Roller Bearing,Thrust roller bearing,Spherical roller bearing,Deep groove ball bearing,Angular contact ball bearing etc.


Q:Can I get Needle roller bearing free samples?                                                 

A:We will charge a little sample fee for our regular designs or customized ones, These charges will be refunded to you when your mass production order is confirmed.


Q:Can you make the products as our requirement?     

A:We have more than 10years’ OEM experience. We supply products fo more than 300 automobile parts factories.





Rolling Body: Roller Bearings
The Number of Rows: Single
Outer Dimension: Small and Medium-Sized (60-115mm)
Material: Bearing Steel
Spherical: Non-Aligning Bearings
Load Direction: Radial Bearing
US$ 0.1/Piece
1 Piece(Min.Order)

Request Sample



Customized Request


Types of Ball Bearings

There are many types of Ball Bearings available on the market, but which one is best for your application? Here, we will discuss the differences between Angular contact, Single-row, High-carbon steel, and Ceramic ball bearings. These types of bearings also feature races, or a groove in the center of each. These races are important in keeping the balls contained within the cylinder. They also provide a groove-baed pathway.


The ceramic ball used in ball bearings has many advantages. It is lightweight, operates at lower temperatures, has reduced skidding, and is resistant to electrolysis. The ball also exhibits longer fatigue life. All of these factors make the ceramic ball a good choice for many applications. But, how do you know if a ceramic ball bearing is right for your application? Read on to discover why ceramic ball bearings are a better choice than steel or stainless steel ones.
The ceramic balls are 40% more dense than steel. This means less centrifugal force is generated on the bearing, which suppresses heat generation. Because of this reduced friction, ceramic bearings are more efficient at transferring energy. Compared to steel bearings, ceramic balls have longer life spans. Nonetheless, these ceramic balls aren’t as strong as steel. Therefore, it is important to understand the limitations of the ceramic ball bearing before buying one.
The ceramic materials used for ball bearings are resistant to micro-welding. Metals undergo this process when imperfections in the surfaces interact. Eventually, this results in a brittle ball that reduces the life of a bearing. Unlike metals, ceramic materials have a stable behavior at high temperatures and exhibit less thermal expansion. This means that they can be used for applications where lubrication isn’t an option.
While steel balls can easily absorb contaminants and foreign particles, the ceramic ball is insensitive to this, and doesn’t require lubrication. This means they’re not susceptible to corrosion and other common problems. These are just a few reasons why ceramics are a better choice. This technology has a wide range of uses. It’s easy to see why it is so popular. If you’re looking for a new bearing for your application, be sure to contact an AST Applications Engineer. They can analyze your operating conditions and potential failure modes.

Angular contact

An Angular Contact Ball Bearing (also known as an angular-contact bearing) has an axial component that is generated when radial loads are applied. They are generally used in pairs, triplex sets, or quadruplex sets. These bearings are also available with Super Finished Raceways to reduce noise and improve lubricant distribution. Angular contact ball bearings have various design units, such as bore size, outer diameter, and outer ring width.
A single-row angular contact bearing has a radial contact angle that is equal to the angular distance between the two rings. Double-row angular bearings are designed for two-way thrust capability. These types of bearings can be purchased at Grainger and other online retailers. A typical angular contact bearing will last up to a million revolutions. They are often used in industrial angular contact bearings.
Single-row angular contact ball bearings feature a set contact angle. These bearings can support radial and axial loads, but they can’t withstand high speeds. Single-row angular contact ball bearings may also have one or two shoulders relieved. Thrust load is a pressure placed on the bearing when it is installed in an assembly, and it is used to create an angle between the races.
Angular contact ball bearings come in single and double-row configurations. They differ in the axial load they can carry and the type of lubrication they use. Angular contact ball bearings are ideal for high-speed applications and can accommodate both radial and axial loads. The type of contact and lubrication used in angular-contact ball bearings depends on the intended use for the bearing.

High-carbon steel

Carbon steel is a low-alloy and high-carbon steel used in bearings. This material provides superior strength and fatigue properties for ball and roller bearings. Its mechanical properties are ideal for applications where the temperature is less than 400 degrees Fahrenheit. High-carbon steel is also used to make bearing components for chrome steel bearings. These types of steels are softer than chrome steel but provide superior durability in applications where the material is exposed to severe conditions.
Hardened carbon steel balls with an AISI 1015 hardness index are used in a variety of automotive, commercial, and semi-precision applications. In addition to automotive applications, they are also used in slides, trolleys, and conveyors. AISI 1015 carbon steel balls are used in bearings. They can be purchased in a variety of weights and diameters. Carbon steel balls can also be purchased in nickel-plated or uncoated varieties for decorative purposes.
In order to determine whether a ball bearing is made of high-carbon steel, the material must be tested for its hardness. An ordinary pocket magnet will work well, but an ordinary rare earth magnet isn’t powerful enough to measure the hardness. If it attracts the magnet strongly, the metal is steel, while a weak magnet indicates a non-ferrous material. A hardness test requires a special microhardness test.
A lower-carbon steel is another option. Some miniature bearing manufacturers use a material with less carbon than AISI 440C. This material is also known as KS440 or X65Cr13. After being heat-treated, it develops smaller carbides, resulting in superior low-noise characteristics and the same corrosion-resistance as 440C. These materials are a less expensive alternative than chrome steel, but they are often less durable than chrome alloy steel.


Single-row angular contact ball bearings accommodate axial loads in one direction. These are normally adjusted against a second bearing. Unlike other ball bearings, they are non-separable and contain an upper and lower shoulder. Single-row ball bearings are made of Chromium Steel (GCr15) which is heat-treated to achieve high uniform hardness and excellent wear resistance. They are the most commonly used type of bearings in the world.
Because of the angular contact between the radial plane and the raceway, single-row ball bearings transmit radial forces from raceway to raceway. A higher a, the greater the axial load carrying capacity of the bearing. Single-row angular contact ball bearings are ideal for high axial loads. However, they have limited preload capabilities and must be installed in pairs. Hence, they are best used for applications where axial forces must be distributed.
Single-row ball bearings can be pre-lubricated and have steel shields. They are also available with rubber seals or snap rings on the outside edge. They are available with various retainers, including pressed steel cages, plastic shields, and rubber seals. A tapered bore is also available upon request. They are ideal for applications where space is limited. The 6200 series of bearings are especially well suited for electrical motors, dental hand tools, and optical encoders.
Single-row angular contact ball bearings are widely used for axial loads. The outer and inner rings have slightly larger radii than the balls. These bearings can accommodate high speeds and low torque. They can also be supplied with different grease levels. If grease is needed, you can choose a lubricant that has different characteristics depending on the application. They are easy to install and maintain. However, they are not recommended for adjacent mounting.


A plastic ball bearing is a highly versatile component that can be mounted in a variety of components, including wheels, pulleys and housings. The outer ring of a plastic bearing is usually the pulley profile. The inner ring can be made of a shaft or polymer. The integrated design of a plastic ball bearing helps to reduce assembly time and cost. Here are some of the benefits of this type of bearing:
First and foremost, plastic balls are lighter than metal balls. They also have less magnetic properties than steel balls, making them the best option for applications requiring low weight and noise. Glass balls are also lighter than stainless steel balls, making them the ideal metal-free choice. They are also very corrosion-resistant, which makes them a great choice for some applications. In addition to being lightweight, polymer ball bearings are also quiet. And because of their low weight, plastic ball bearings are ideal for applications that require fast speed.
Another advantage of plastic bearings is their ability to withstand high temperatures. This material is also abrasion and corrosion-resistant. It meets FDA and USDA acceptance requirements. Aside from its abrasion-resistant and corrosion-resistant properties, these plastics do not transfer heat. Aside from being extremely durable and flexible, most plastics are also self-lubricating. Common plastics include phenolics, acetals, nylon, and ultra high molecular weight polyethylene. Nonetheless, plastics have limitations, and these materials may be damaged by extreme temperatures or cold flow under heavy loads.
Other advantages of plastic ball bearings include their low density, high hardness and low friction coefficient, and ability to withstand heat and corrosion. Ceramics are also lightweight, non-conductive, and have superior resistance to friction. These products can withstand temperatures up to 1,800 degrees Fahrenheit. If you’re in the market for a plastic ball bearing, it’s important to choose the right type of material. And if you’re looking for a high-quality bearing, look no further.

China Custom CZPT Kt192317 Needle Roller Bearing 19mm Inner Diameter Bearings   with Good qualityChina Custom CZPT Kt192317 Needle Roller Bearing 19mm Inner Diameter Bearings   with Good quality
editor by CX 2023-04-20

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