China Custom Si Cylindrical Roller Bearing Nu1021c3 with Best Sales

Product Description



 SI Cylindrical Roller Bearing Nu1571c3

Greese/Oil As your requirement, such as open, z,zz,rz, 2rz,rs, 2rs, and so on.
Vibration Z1/V1,Z2/V2,Z3/V3
Precision P6, P0, P5, P4, P2
Internal clearance codes  
C0, C2, C3, C4, C5
Snap ring N, NR
Feature Low voice, High speed, Low friction, long service life
Application Pharmaceutical equipment, medical equipment, textile machinery
and accessories, knitting machines, weaving machines, spinning
equipment, textile accessories, non-woven fabric machinery,
textile equipment, machinery, metal, mold, automotive
electronics, electrical, instrumentation, military, aviation
aerospace, plastics and rubber industry, medical and other fields.
Package 1,barreled package+outer carton+pallets 
2,single box+outer carton+pallets 
3,tube package+middle box+outer carton+pallets 
4,According to your’s requirement
Details We have a complete process for production and quality assurance to make sure our products can meet your requirement.
2.Windage test
4.Rotary test
5.Greasing and gland
6.Noise inspection
7.Appearance inspection
8.Rust prevention

The cylindrical roller bearing is the radial rolling bearing with the cylindrical rollers. The internal structure of the bearing adopts a parallel arrangement of rollers. This type of bearings is the separable bearing. Separate inner ring and outer ring, which are very convenient to install and disassemble, with the advantage of large radial load capacity and low friction coefficient. 

The bearing can be divided into single-row, double-row, and multi-rows cylindrical roller bearings according to the number of rows of rolling elements. There are also differences in the design of the position of the ribs.


Model List (Please contact with us for more models)



Bearing Number Boundary dimensions(mm) Basic load ratings(kN) Limiting speeds(rpm) Mass(Kg)
    d D B rs min rs1 min Cr Cor Grease Oil (Approx.)
NU10 Series NU1005 25 47 12 0.6 0.3 15.1 14.1 16,000 19,000 0.092
  NU2211E 55 100 25 1.5 1.1 97 114 5,600 6,600 0.968
  NU2212 60 110 28 1.5 1.5 96 116 5,800 6,800 1.06
  NU2212E 60 110 28 1.5 1.5 131 157 5,200 6,100 1.21
  NU2213 65 120 31 1.5 1.5 120 149 5,400 6,300 1.4
  NU2213E 65 120 31 1.5 1.5 149 181 4,800 5,600 1.6
  NU2214 70 125 31 1.5 1.5 119 151 5,000 5,900 1.47
  NU2214E 70 125 31 1.5 1.5 156 194 4,500 5,200 1.7
  NU2215 75 130 31 1.5 1.5 130 162 4,700 5,500 1.55
  NU2215E 75 130 31 1.5 1.5 162 207 4,200 4,900 1.79
  NU2216 80 140 33 2 2 147 186 4,400 5,100 1.93
  NU2216E 80 140 33 2 2 186 243 3,900 4,600 2.12
  NU2217 85 150 36 2 2 170 218 4,100 4,800 2.44
  NU2217E 85 150 36 2 2 217 279 3,700 4,300 2.68
  NU2218 90 160 40 2 2 197 248 3,900 4,600 3.1
  NU2218E 90 160 40 2 2 242 315 3,500 4,100 3.33
  NU2219 95 170 43 2.1 2.1 230 298 3,600 4,300 3.79
  NU2219E 95 170 43 2.1 2.1 286 370 3,300 3,800 4.14
  NU2220 100 180 46 2.1 2.1 258 340 3,500 4,100 4.57
  NU2220E 100 180 46 2.1 2.1 335 445 3,100 3,600 5.01
  NU2222 110 200 53 2.1 2.1 320 415 3,100 3,700 6.56
  NU2222E 110 200 53 2.1 2.1 385 515 2,800 3,300 7.4
  NU2224 120 215 58 2.1 2.1 350 460 2,900 3,400 8.19
  NU2224E 120 215 58 2.1 2.1 450 620 2,600 3,000 9.18
  NU2226 130 230 64 3 3 380 530 2,600 3,100 10.2
  NU2226E 130 230 64 3 3 530 735 2,300 2,700 11.8
  NU2228 140 250 68 3 3 445 635 2,400 2,800 12.9
  NU2228E 140 250 68 3 3 575 835 2,100 2,500 15.8
  NU222E 110 200 38 2.1 2.1 293 365 3,100 3,700 4.27
  NU2230 150 270 73 3 3 500 710 2,200 2,600 16.3
  NU2230E 150 270 73 3 3 660 980 2,000 2,400 19.7

A wide range of applications:

• agriculture and forestry equipment
• automotive and industrial gearboxes
• automotive and truck electric components, such as alternators
• electric motors
• fluid machinery
• material handling
• power tools and household appliances
• textile machinery
• two Wheeler.

Our Bearing Advantage:

1.ISO Standard

2.Bearing Small order accepted

3.In Stock bearing

4.OEM bearing service

5.Professional:20 years manufacture bearing

6.Customized bearing, Customer’s bearing drawing or samples accepted

7.Competitive price bearing

8.TT Payment or Western Union or PayPal

Our Company

Packaging Details 1 piece in a single box
50 boxes in a carton
20 cartons in a pallet
Nearest Port ZheJiang or HangZhou
Lead Time For stock parts: 1-5 days.
If no stock parts:
<200 pcs: 15-30 days
≥200 pcs: to be negotiated.


1.How do you make our business long-term and good relationship? 
– We keep good quality and competitive price to ensure our customers benefit ;
– We respect every customer as our friend and we sincerely do business and make friends with them,
  no matter where they come from.


2.Do you test all your goods before delivery?
– Yes, we have 100% test before delivery


3.What products does your company supply?
– Auto Bearings (Wheel Bearings, Wheel Hub Bearings, Clutch Bearings, Belt Tensioners and Water Pump Bearings etc. )    

-Industrial Bearings (Deep Groove Ball Bearings, Tapered Roller Bearings and Pillow Block Bearings).

What to Look for in a Belt Tensioner

If you notice the power steering, air conditioning, or power steering stops working, chances are that your belt tensioner has been compromised. A compromised belt tensioner can be completely destroyed overnight, or it can last for a long time before it breaks. Either way, you should never drive with a faulty belt tensioner. It’s far better to have it replaced before the engine shuts down completely. In addition, replacing a belt tensioner will prevent other complications, such as power steering or air conditioning, from occurring.

Misaligned idler pulley

If the tensioner arm is not rotating freely or has an abnormal chirping noise, it could be the result of a misaligned idler pulley. If this is the case, replace the idler. If the idler does not move, you may need to adjust the accessory mount points or use a laser alignment tool. The tensioner arm is only 1 part of the tensioner.
A misaligned idler pulley on a belt tensioner is usually the cause of a squeaking noise. If this noise continues even after a replacement of the belt, it’s time to replace the whole belt. A misaligned idler pulley can also be the cause of premature belt wear. If the idler pulley is out of alignment, it could also cause the belt to wear too fast and lead to the premature failure of the timing belt.
The tensioner pulley is made of nylon, steel, or plastic. It may be flat or grooved. Before replacing it, check for any cracks, dents, or debris on the pulley’s surface. Plastic pulleys may have broken sidewalls. If the idler pulley is worn out, you might also notice squealing noises when the vehicle is in motion.
The misalignment of a belt is most pronounced when the span between the 2 pulleys is short. When the span is long, however, diagnosing the problem becomes more complicated. Small degrees of offset may not be visible to the naked eye, but a laser alignment tool can help identify these subtle variations. In order to identify a misaligned idler pulley on a belt tensioner, you must first determine its cause.
When the tensioner’s idler pulleys are out of line, a belt tensioner will not be able to properly adjust the torque that the belt is under. This may result in squealing noises. If this is the case, it is time to call a mechanic. He or she will be able to determine the cause and correct it. If you suspect the problem, your next step is to replace the idler pulley on the belt tensioner.
If the ribbed belt is not properly aligned, you may have a misaligned idler pulley. To fix the misalignment, locate the belt adjustment bolt underneath the hood. You should be careful not to damage the alternator or battery terminal while doing this task. If you do accidentally connect the battery positive to the earth, you might be able to damage the ribbed belt and ruin your vehicle’s timing.
Besides a misaligned idler pulley on the belt tensioner, another problem may be the alternator’s serpentine belt. If your car’s alternator belt is not aligned properly, you could have misaligned the alternator’s pulley or a worn-out bearing. Regardless of the cause of your problem, you should have the belt inspected.

Bad idler pulley

Having a Bad Idler Pulley on a Belt Tensioner? If this sounds familiar, then it’s probably time to change it. Idler pulleys slowly take hits while the engine is running, causing the belt to wrap and bend. Eventually, the belt will slip, and a new idler pulley should be installed to ensure optimal tension. But before you spend a dime on a new one, let’s talk about what to look for.
Symptoms of a Bad Idler Pulley: If the noise persists, there is a problem with the idler pulley or its bearing. These parts wear out over time and may eventually cause a cracked idler pulley or serpentine belt. Not only will the idler pulley create an irritating noise, but it will also damage the belt itself, leading to overheating, stalled engine, and even damage the head gaskets. Thankfully, a Bad Idler Pulley on a Belt Tensioner is easily replaced and will only cost about $40.
Although the Idler Pulley is not the most popular component on a car, it’s a critical part that ensures that the engine runs smoothly. It’s easy to overlook this part, but its failure can make it impossible for your vehicle to operate at its optimal level. Moreover, a Bad Idler Pulley on a Belt Tensioner will cause your engine to malfunction, so it’s essential that you check it at regular intervals.
If you notice a squealing noise while driving, the Idler Pulley is likely the culprit. Because of friction between the engine belt and idler pulley, the engine belt rubs against the pulley, causing it to squeak and make a clicking noise. This squealing noise will continue until the problem is repaired or replaced. It’s time to start addressing the problem before it becomes too late.
If you notice the tensioner pulley moving away from the engine, it’s most likely that the pulley is malfunctioning. A belt that is loose or slack may make it difficult to start the car, or your engine may even overheat. If this occurs, it’s crucial to replace the Idler Pulley as soon as possible, because a Bad Idler Pulley on a Belt Tensioner can seriously damage your vehicle.
The Idler Pulley facilitates the motion of the engine belt. It serves as a smooth rotating point that allows the belt to loop without a barrier. Over time, this part of the system will begin to show signs of wear and tear, and replacement is vital to protect your engine, serpentine belt, and other accessories. An early warning sign of a problem is a squealing sound coming from the engine area.

Broken tensioner arm

The belt tensioner is a piece of machinery that is used to keep the belt tight. If this part breaks, you can easily repair it yourself using a long-handled ratchet, serpentine belt tool, or a socket. To repair the tensioner, simply remove the drive belt from the pulley and rotate it to release tension. Check for roughness, resistance, or binding of the drive belt.
Noises caused by the tensioner are a sign of a damaged component or excessive oscillation. These noises are usually caused by worn internal components or the tensioner’s pivot bushing. In some cases, the vibration damping system or a worn-out alternator pulley could also be to blame. If this is the case, replace the pulley and tensioner together. To check the condition of your belt tensioner, follow these steps.
In addition to worn-out springs, a loose or broken pivot arm could be causing your belt to misalign. A worn-out tensioner pulley bushing will also cause vibrations, noise, and seizing. Lastly, a broken tensioner spring could be preventing the belt from maintaining proper tension. Broken springs are also prone to loss of tension due to heat. Damaged tensioner housing can also affect belt tension.
Once the belt is installed, you need to check the condition of the pulley and the tensioner arm. Make sure that the pulley is moving and that the arm is moving smoothly with the cranking and releasing. If the arm is wobbling, the tensioner is failing. If the pulley wobbles or excessive chattering occurs, the tensioner is failing. It can also be seized or jammed.
If the tensioner arm has broken, replace it. Replacing the tensioner can be a tedious task. Be sure to use a suitable tool to tighten the pulley and tensioner. If you are not sure of how to replace the pulley, try using a serp belt tool. Another good option is to purchase a 3/8 drive ratchet. If you don’t have this tool, you can use a long 3/8 extension and a deep socket.
The belt tensioner assembly can fall off the engine, causing damage to the timing belt. If you are replacing it, you must replace it with a new one, and tighten all of the mounting bolts before reinstalling it. To avoid further damage to the engine, ensure you replace the belt with a new tensioner and a new belt. The tensioner is bolted to the engine’s timing cover, so make sure you carefully tighten the bolts when replacing it.

China Custom Si Cylindrical Roller Bearing Nu1021c3     with Best SalesChina Custom Si Cylindrical Roller Bearing Nu1021c3     with Best Sales