China high quality Cam Follower Natr 20 PPA Natr20-PP-a Cylindrical Roller Track Roller Bearing Natr20 Size 20X4 bearing driver

Product Description


 cam follower NATR 20 PPA NATR20-PP-A cylindrical roller track roller bearing NATR20 size 20×4

Description of  cam follower NATR 20 PPA NATR20-PP-A cylindrical roller track roller bearing NATR20 size 20×4

Series Description
NATR Yoke type track rollers with axial guidance by washers,gap seal,with inner ring
NATR…PP Yoke type track rollers with additional sealing rings
NATV Yoke type track rollers with axial guidance by washers,full complement,gap seal,with inner ring
NATV…PP Yoke type track rollers with additional sealing rings
NUTR Yoke type track rollers with axial guidance by the rolling element,full complement,gap seal,with inner ring
KR Stud type track rollers with axial guidance by rid and washer,gap seal
KR…PP Stud type track rollers with sealing rings
KRE Stud type track rollers with eccentric collar
KRE…PP Stud type track rollers with eccentric collar and sealing rings
KRV Stud type track rollers with axial guidance by rid and washer,full complement, gap seal
KRV…PP Stud type track rollers with sealing rings
KRVE Stud type track rollers with eccentric collar
KRVE…PP Stud type track rollers with eccentric collar and sealing rings
NUKR Stud type track rollers with axial guidance by the rolling element,full complement, gap seals
NUKRE Stud type track rollers with eccentric collar
CF Stud type track rollers with cage ,the same as KR series

Catalogue of cam follower NATR 20 PPA NATR20-PP-A cylindrical roller track roller bearing NATR20 size 20×4



Bearing Designation and 

mass approx

Borndary Dimensions Basic Load Rating





Mass Sealed Mass d D B C d1 Cr Cor As Yoke Type Track Rollers Grease
Dynamic Static Cw Cow
mm   g   g mm N rpm
16 NATR 5 14 NATR 5 PP 14 5 16 12 11 12 3050 3000 2050 2400 22000
NATV 5 15 NATV 5 PP 15 5 16 12 11 12 4500 6300 3680 4300 8500
19 NATR 6 20 NATR 6 PP 20 6 19 12 11 14 3600 3650 2450 2850 20000
NATV 6 21 NATV 6 PP 21 6 19 12 11 14 5700 8700 4600 6750 7000
24 NATR 8 41 NATR 8 PP 41 8 24 15 14 19 4500 5400 3900 4500 5000
NATV 8 42 NATV 8 PP 42 8 24 15 14 19 8600 12000 6700 9800 5500
30 NATR 10 64 NATR 10 PP 64 10 30 15 14 23 6100 7800 4500 6900 11000
NATV 10 65 NATV 10 PP 65 10 30 15 14 23 10900 17000 7600 11800 4500
32 NATR 12 71 NATR 12 PP 71 12 32 15 14 25 6600 9800 4660 7000 9000
NATV 12 72 NATV 12 PP 72 12 32 15 14 25 11800 19000 7800 13000 3900
35 NATR 15 103 NATR 15 PP 103 15 35 19 18 27 10500 17500 7800 11500 7000
NATV 15 105 NATV 15 PP 105 15 35 19 18 27 16000 32500 15710 20500 3400
40 NATR 17 144 NATR 17 PP 144 17 40 21 20 32 11800 19400 9500 13500 6000
NATV 17 152 NATV 17 PP 152 17 40 21 20 32 19600 37000 1200 23000 2900
47 NATR 20 246 NATR 20 PP 246 20 47 25 24 37 17500 29800 13500 22500 4900
NATV 20 254 NATV 20 PP 254 20 47 25 24 37 25800 57000 19000 39500 2600
52 NATR 25 275 NATR 25 PP 275 25 52 25 24 42 19500 36500 13400 23500 3600
NATV 25 285 NATV 25 PP 285 25 52 25 24 42 29000 69600 19800 40900 2100
62 NATR 30 470 NATR 30 PP 470 30 62 29 28 51 31000 57500 20900 35500 2600
NATV 30 481 NATV 30 PP 481 30 62 29 28 51 45500 104000 27800 60900 1700
72 NATR 35 635 NATR 35 PP 635 35 72 29 28 58 34500 67500 22500 41000 2000
NATV 35 647 NATV 35 PP 647 35 72 29 28 58 50800 109500 30900 70800 1400
80 NATR 40 805 NATR 40 PP 805 40 80 32 30 66 47000 91500 30900 56500 1700
NATV 40 890 NATV 40 PP 890 40 80 32 30 66 64000 139000 39800 87800 1300
85 NATR 45 910 NATR 45 PP 910 45 85 32 30 72 49100 98000 30600 56900 1500
90 NATR 50 960 NATR 50 PP 960 50 90 32 30 76 50500 10600 30600 57500 1300
NATV 50 990 NATV 50 PP 990 50 90 32 30 76 69500 187000 38700 90900 1000


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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


Customized Request

cam folllow bearing

How do cam follower bearings contribute to the proper functioning of reciprocating machinery like engines?

Cam follower bearings play a crucial role in ensuring the proper functioning of reciprocating machinery, such as engines. Let’s explore how cam follower bearings contribute to the smooth operation of reciprocating machinery:

  • Transmitting Motion: Cam follower bearings are designed to follow the profile of a cam, which is a specially shaped component that converts rotary motion into reciprocating or oscillating motion. By maintaining contact with the cam’s surface, the cam follower bearing transfers the motion from the rotating cam to other components in the machinery, such as valves, pistons, or fuel injectors. This motion transmission is essential for proper engine operation, controlling valve timing, fuel injection, and other critical processes.
  • Supporting Load: Reciprocating machinery, including engines, generates significant forces and loads during operation. Cam follower bearings provide support and bear the loads exerted by the moving components, such as valves or pistons. They ensure the smooth and precise movement of these components, while also carrying the associated dynamic and static loads. Proper load support is crucial for maintaining the stability, accuracy, and longevity of reciprocating machinery.
  • Reducing Friction and Wear: Cam follower bearings incorporate rolling elements, such as rollers or needles, that reduce friction between the cam and the bearing. This rolling action minimizes the sliding contact and frictional heat generation, resulting in reduced wear on the bearing surfaces. By reducing friction and wear, cam follower bearings contribute to the efficient operation of reciprocating machinery, promoting energy efficiency and extending the bearing’s service life.
  • Absorbing Shock and Vibration: Reciprocating machinery, especially engines, generates significant shock and vibration due to the rapid acceleration and deceleration of components. Cam follower bearings are designed to absorb and dampen these shocks and vibrations, preventing their transmission to other parts of the machinery. This helps to reduce noise, minimize structural fatigue, and improve overall system stability, ensuring smooth and reliable operation.
  • Accommodating Misalignment: In reciprocating machinery, slight misalignments can occur due to manufacturing tolerances, thermal expansion, or dynamic loads. Cam follower bearings are designed to accommodate limited misalignments between the cam and the bearing, allowing for proper functioning even under these conditions. This flexibility helps to maintain the alignment and engagement between the cam and the bearing, ensuring efficient motion transmission and preventing excessive stress or premature failure.
  • Facilitating Lubrication: Proper lubrication is essential for the smooth operation and longevity of cam follower bearings and reciprocating machinery. Cam follower bearings are designed to retain lubricants, such as grease or oil, within the bearing assembly. They incorporate features like lubrication holes, grooves, or channels to facilitate the distribution of lubricant to the bearing surfaces. Effective lubrication minimizes friction, reduces wear, and helps dissipate heat, ensuring optimal performance and preventing damage to the bearing and associated components.

Overall, cam follower bearings play a vital role in the proper functioning of reciprocating machinery, such as engines. They transmit motion, support loads, reduce friction and wear, absorb shocks and vibrations, accommodate misalignments, and facilitate lubrication. By fulfilling these functions, cam follower bearings contribute to the efficient, reliable, and smooth operation of reciprocating machinery, enabling the performance and longevity of engines and other similar applications.

cam folllow bearing

What are the signs of wear or damage in cam follower bearings, and when should they be replaced?

Cam follower bearings can exhibit signs of wear or damage over time, which may indicate the need for replacement. Let’s explore the common signs of wear or damage in these bearings and discuss when they should be replaced:

1. Increased Noise: Unusual or excessive noise during operation, such as grinding, squeaking, or rumbling sounds, can be an indication of bearing wear. If the noise becomes noticeably louder or changes in pitch, it is advisable to inspect the bearing for potential damage.

2. Abnormal Vibration: Excessive vibration or noticeable changes in vibration patterns can be a sign of bearing wear or misalignment. Excessive vibration can lead to accelerated wear and potential failure of the bearing if not addressed promptly.

3. Irregular Motion: If the cam follower bearing exhibits irregular or inconsistent motion, such as sticking, jerking, or hesitation, it may indicate wear or damage. This can affect the smooth operation of the machinery and lead to decreased efficiency or performance issues.

4. Increased Friction: If the bearing experiences higher levels of friction, it may result in increased heat generation or uneven wear. Excessive friction can lead to premature wear of the bearing surfaces and compromise the overall performance of the machinery.

5. Visible Damage: Inspect the bearing for any visible signs of damage, such as cracks, pitting, spalling, or deformation. These visual indications may suggest that the bearing has reached its operational limits and requires replacement.

6. Loss of Lubrication: Insufficient lubrication or loss of lubricant film can lead to accelerated wear and damage in cam follower bearings. If there are signs of inadequate lubrication, such as dry or discolored surfaces, it is essential to address the lubrication issue and consider replacing the bearing if necessary.

7. Excessive Play or Clearance: Excessive axial or radial play in the bearing, or an increase in the clearance between the bearing components, can indicate wear or damage. Excessive play can affect the precision of motion and compromise the overall performance of the machinery.

When to Replace Cam Follower Bearings:

The exact timing for bearing replacement depends on various factors, including the severity of wear or damage, the criticality of the application, and the manufacturer’s guidelines. However, as a general guideline, cam follower bearings should be replaced under the following circumstances:

  • When any of the above-mentioned signs of wear or damage are observed.
  • If the bearing is approaching or has exceeded its predicted service life based on the manufacturer’s recommendations.
  • When routine inspections reveal significant wear or damage that may compromise the bearing’s performance or safety.
  • During scheduled maintenance or overhaul of the machinery, as part of a proactive replacement strategy.

It is crucial to consult the manufacturer’s guidelines, maintenance manuals, or seek the advice of a qualified engineer or technician to determine the appropriate timing for cam follower bearing replacement in specific applications.

By monitoring the signs of wear or damage, and addressing them promptly, the performance, reliability, and safety of the machinery can be maintained, minimizing the risk of unexpected failures or production disruptions.

cam folllow bearing

How does proper lubrication impact the performance and longevity of cam follower bearings?

Proper lubrication plays a critical role in enhancing the performance and longevity of cam follower bearings. Adequate lubrication helps reduce friction, dissipate heat, prevent wear, and minimize the risk of damage or premature failure. Let’s explore in detail how proper lubrication impacts the performance and longevity of cam follower bearings:

  • Friction Reduction:
  • Lubrication creates a thin film of lubricant between the rolling elements and the raceways of the cam follower bearing. This lubricating film reduces the friction between the contacting surfaces, allowing for smoother rolling motion. By minimizing friction, proper lubrication helps to optimize the efficiency of the bearing, reduce energy consumption, and minimize heat generation.

  • Wear Prevention:
  • Cam follower bearings are subjected to repeated cycles of loading and unloading, which can lead to surface contact and potential wear. The presence of an appropriate lubricant creates a protective barrier between the rolling elements and the raceways, preventing direct metal-to-metal contact. This lubricating film helps to minimize wear, pitting, and surface damage, thereby extending the bearing’s lifespan.

  • Heat Dissipation:
  • During operation, cam follower bearings generate heat due to friction and the mechanical forces involved. Proper lubrication helps dissipate this heat by carrying it away from the bearing’s contact surfaces. Efficient heat dissipation prevents excessive temperature rise, which can lead to thermal expansion, loss of lubrication properties, and accelerated wear. By maintaining appropriate operating temperatures, proper lubrication contributes to the longevity and reliability of the bearing.

  • Contamination Protection:
  • Lubrication acts as a barrier against contaminants such as dirt, dust, moisture, and other foreign particles. It helps to seal the bearing and prevent the ingress of contaminants into the bearing’s internal components. By keeping the rolling elements and raceways clean, proper lubrication reduces the risk of abrasive wear, corrosion, and damage caused by particle-induced stress concentrations.

  • Corrosion Prevention:
  • In environments where corrosion is a concern, such as high humidity or exposure to corrosive substances, proper lubrication helps protect the bearing against corrosion. The lubricant forms a protective layer that inhibits moisture and corrosive agents from reaching the bearing surfaces. This corrosion prevention capability ensures the integrity of the bearing’s components and prolongs its operational life.

  • Noise and Vibration Reduction:
  • Proper lubrication can contribute to reducing noise and vibration levels in cam follower bearings. The lubricating film helps to cushion the impact and dampen the vibrations caused by the rolling elements. This dampening effect minimizes noise generation and vibration transmission, resulting in smoother and quieter bearing operation.

  • Longevity and Reliability:
  • By providing effective lubrication, cam follower bearings experience reduced friction, wear, and heat, resulting in increased longevity and reliability. Proper lubrication ensures the bearing can withstand heavy loads, high speeds, and demanding operating conditions while maintaining its performance over an extended period. It helps prevent premature failure, minimizes the risk of unplanned downtime, and contributes to the overall productivity of the application.

In summary, proper lubrication is essential for optimizing the performance and longevity of cam follower bearings. It reduces friction, prevents wear, dissipates heat, protects against contamination and corrosion, reduces noise and vibration, and enhances the bearing’s overall reliability. By selecting the appropriate lubricant and following the recommended lubrication intervals, cam follower bearings can operate efficiently, withstand demanding conditions, and provide extended service life.

China high quality Cam Follower Natr 20 PPA Natr20-PP-a Cylindrical Roller Track Roller Bearing Natr20 Size 20X4   bearing driverChina high quality Cam Follower Natr 20 PPA Natr20-PP-a Cylindrical Roller Track Roller Bearing Natr20 Size 20X4   bearing driver
editor by CX 2024-05-14