The supply of high-quality entity ferrule needle bearing

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Shanghai
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50 set
Supply Capability:
10000 set/month

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Product Description:

Entity by a needle bearing ring or two rings and a cage with needle rollers. According to different applications, can be divided into the bearings with inner ring or inner ring.Therefore, the physical ring needle roller bearings can meet the requirements of light weight, small space occupation, large transmission power requirements. Size and higher carrying capacity physical ring needle roller bearings with smaller.

The main structures

Outer double wall (or double lock ring) with cage of needle roller bearings NA, NKI type

The inner and outer rings can be installed separately (with a lock ring, a full set of needle roller and cage), access high speed, divided into single and double row two.

If the shaft can not be used as a raceway, hardened shaft that if grinding is not possible orthe economy, you can use these needle roller bearings with inner ring.

There is no inner needle bearing cage

NA, NKI type bearings without inner ring is RNA, NK type needle roller bearings.

Such bearings without inner ring, radial mounting dimensions for the supporting structurerestricted, and the match of the journal bearing is directly used as a rolling surface. As a raceway shaft, and grinding the hardware must be quenched, and only be processed to the appropriate size and shape accuracy, service life and operation precision set of needle roller bearings to higher. At the same time, because of the inner ring, the diameter of the shaft may also be appropriate to increase, thus increasing the rigidity.

Sealed needle roller bearings with or without inner ring

Needle roller bearings, single or double seal can effectively prevent the intrusion of dirt,bearing in lithium base grease amount. This type of bearing inner ring outer ring width than, and ensure a good seal and prevent injury to the bearing pollution can also which makes the bearing have micro displacement in the shaft to the bearing box. The inner ring of the bearing has the lubrication oil hole, can be configured according to the needs, from the outer ring or inner added lubricating.

Entity by a needle bearing ring or two rings and a cage with needle rollers. Size and higher carrying capacity it has smaller. Therefore, the bearing can meet the light weight, small space occupation, large transmission power requirements. According to different applications, can use the bearings with inner ring or inner ring. Outer double wall (or double lock ring) with cage of needle roller bearings NA, NKI type

The inner and outer rings can be installed separately (with a lock ring, a full set of needle roller and cage), access high speed, divided into single and double row two.

If the shaft can not be used as a raceway, hardened shaft that if grinding is not possible orthe economy, you can use these needle roller bearings with inner ring.

2 there is no inner needle bearing cage

Edit

NA, NKI type bearings without inner ring is RNA, NK type needle roller bearings.

Such bearings without inner ring, radial mounting dimensions for the supporting structurerestricted, and the match of the journal bearing is directly used as a rolling surface. As a raceway shaft, and grinding the hardware must be quenched, and only be processed to the appropriate size and shape accuracy, service life and operation precision set of needle roller bearings to higher. At the same time, because of the inner ring, the diameter of the shaft may also be appropriate to increase, thus increasing the rigidity.

3 with or without inner ring sealed needle roller bearing

Edit

Needle roller bearings, single or double seal can effectively prevent the intrusion of dirt,bearing in lithium base grease amount. This type of bearing inner ring outer ring width than, and ensure a good seal and prevent injury to the bearing pollution can also which makes the bearing have micro displacement in the shaft to the bearing box. The inner ring of the bearing has the lubrication oil hole, can be configured according to the needs, from the outer ring or inner added lubricating.


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Q:Cylindrical roller bearings and needle roller bearings is the same thing?
Cylindrical roller bearings, rolling bodies are cylindrical roller bearings. Cylindrical roller and raceway are line contact bearings. Load capacity, mainly bear radial load. The friction between the rolling body and the ring block is small and suitable for high speed rotation. According to the ring has no edge, can be divided into NU, NJ, NUP, N, NF and other single row bearings, and NNU, NN and other double row bearings. Needle roller bearings are cylindrical roller bearings, relative to their diameter, the roller is thin and long. This roller is called needle roller. Although it has a small section, the load bearing capacity of the bearing is still high, with thin and long needle bearing roller (roller diameter of D = 5mm, L/D = 2.5, L roller length), so the radial structure is compact, the minimum diameter of the diameter and load capacity and other types of bearings, bearing the same, especially for the structure in radial installation size limited. According to the use of different occasions, can choose the inner ring of the bearing or needle roller and cage assembly, the shaft neck surface and the surface of shell holes matched with a bearing directly as the bearing inner and outer rolling surface, in order to ensure the load capacity and operating performance and have the same ring bearing, shaft or housing bore raceway surface hardness the machining precision and the surface quality of bearing ring raceway and similar. This kind of bearing can only bear radial load.
Q:What are the differences between cylindrical roller bearings and needle roller bearings?
What are the differences between cylindrical roller bearings and needle roller bearings? In particular, if the roller and needle diameter is about the same, cylindrical roller bearings and inner ring needle roller bearings seem to be difficult to identify it
Q:Roller needle roller bearings can be used directly as a wheel?
Under better working conditions, it can be used as a wheel. There may be problems in using the wheel as a poor condition;Bad conditions are high speed (high temperature), high load (no wheel is not related), rigid contact (accelerated external hub wear), high frequency vibration caused by uneven contact surface, high temperature environment.In general, the use of wheels can lead to higher speed and faster wear.
Q:How much speed can the needle bearing of inner bore 17mm bear?
The needle bearings with an inner diameter of 17mm have various forms.1. needle roller and cage assembly2. press outer ring needle roller bearing3. solid needle roller bearingsPermissible rotation speed of needle and cage assemblies:Grease lubrication: 16000rpmOil lubrication: 26000rpmAllowable speed of needle roller bearing for stamping outer ring:Grease lubrication: 12000rpmOil lubrication: 19000rpmAllowable rotational speed of solid needle roller bearings:Grease lubrication: 13000rpmOil lubrication: 20000rpm
Q:Which method should be used for axial fixing of needle roller bearing in stamping outer ring?
General stamping ring needle roller bearings are the outer diameter and the hole is fit to the location, so for stamping ring bearings have a pressing force of the technical requirements. Here I put it in the production process: stamping, heat treatment (about carburizing layer to control, otherwise the last edge will open - Cases) left - lips - cast oxide annealing oxidation layer, the holder on the needle sleeve ring, stamping edge (technical requirements: the rolling head edge within the height, diameter, (note that both ends and in the middle to be consistent) and pressed into the ring after the gage qualified).
Q:What are the differences between needle roller bearings and cylindrical roller bearings?
With the same diameter, the needle roller bearings have smaller radial sizes and smaller carrying capacity.
Q:What is the needle roller bearing model with outer diameter 21 and inner diameter 16?
The outer diameter of 21 needle bearings with 16, the market is not available.The outer diameter of 21 needle roller bearings through 15, some models are hk1512.
Q:Needle roller bearings are how to process the needle, so smooth finish?
The process of needle: blank forming, deburring, heat treatment, coarse and fine grinding, end rolling surface, super finishing rolling surface polishing or sawdust.For flat head or taper head needle roller, such as blank forming, it is difficult to guarantee the length and size tolerance, and the grinding double end process can be increased. If the convex generatrix rolling surface is needed, it can be carried out directly in the process of super finishing, rolling or channeling.
Q:What is the bearing capacity of needle bearing and copper sleeve?
The copper sleeve and the shaft are surface contact, and the bearing capacity is large;The needle roller of needle roller bearing is several line contact, and it has less bearing capacity than copper sleeve;The sliding friction, friction force is large, suitable for low speed and heavy load, preferably with good lubrication, in static pressure under the condition of high speed, such as grinding machine is of high speed and heavy load static and vibration resistance than good bearing;The latter is rolling friction, and the transmission efficiency is higher, suitable for medium speed.
Q:Many one-way needle roller bearings have small holes in the inner and outer rings. What's the function of these small holes?
It's all oil holes, but if it's needle roller bearings, there should be very little oil holes. We also do one-way needle roller bearings, but there are no oil holes, there are oil holes are generally reflected in other series

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