Product Description
Cylindrical Roller Bearing (N318ECM, NJ312) Description
NJ design
The outer ring has 2 integral flanges and the inner ring 1 integral flange. The bearings are therefore suitable for the axial location of a shaft in 1 direction.
Cylindrical roller bearings are widely used in the bearing of gearbox, CZPT of rear axle bevel gear in a car and all kinds of engineering equipment. Roller and rolling way contact with a streamline that makes radial bearing capacity great. Those whose external and internal rings without a board (type of NU, N) cannot support the axial load, while those with a board (type of NJ, NUP) can support the axial load to a certain extent.
There is a line contact between cylindrical roller and roller path, while the radcat liad capacity is great, so these products not only apply to heavy load and shock load, but also apply to high-speed rotation. The N and NU types can realize axial movements, which apply to changes of axle and casing relative positions resulting from thermal expansion or installation error.
The most suitable free end bearings: NJand NFtypes, can withstand a certain degree of axial load; NH and NUPtypes can withstand a cartain dagree ofbi-directional axial load, and their innar or outer rings ara detachable for easvassambly and disassembly. NNU and NN types, strong rigidity to radial load, are mostly used for spindles of machine tools.
Main Applications:
Medium and large motors, generators, internal combustion engines, gas turbines, machine tool spindles, graduating devices, handling machinery, various industrial machineries.
Band: SKF, TIMKEN, NSK, NTN, IKO, NACHI
The company will continue to adhere the business philosophy sincere cooperation, CZPT management, genuine goods at fair prices, and excellent service, and depend on scientific inventory management and perfect after-sale service to seek for closer and lasting partnership with new and old customers. Therefore, the company will surely achieve quick and stable development through the tireless efforts and enterprising spirit of staff as well as the support and encouragement of more and more customers.
1. N type
2. NCL type
3. NF type
4. NJ type
5. NU type
6. NUP type
NJ1030
NJ1571
NJ1026
NJ1571
NJ1571
NJ1571
NJ1571
NJ1017
NJ1018
NJ1019
NJ1014
NJ1015
NJ1016
NJ1011
NJ1012
NJ1013
NJ1008
NJ1009
NJ1571
NJ1005
NJ1006
NJ1007
NJ204E
NJ205E
NJ206E
NJ207E
NJ208
NJ209
NJ210
NJ211
NJ212
NJ213
NJ214
NJ215
NJ216
NJ217
NJ218
NJ219
NJ220
NJ221
NJ222
NJ224
NJ226
NJ228
NJ230
NJ224E
NJ222E
NJ2230
NJ2228
NJ2224
NJ2226
NJ2222
NJ2219
NJ2220
NJ2218
NJ2216
NJ2217
NJ2215
NJ2213
NJ2214
NJ2212
NJ2210
NJ2211
NJ2209
NJ220E
NJ2207E
NJ2208
NJ2204E
NJ2205E
NJ2206E
NJ304E
NJ305E
NJ306E
NJ307E
NJ308
NJ309
NJ310
NJ311
NJ312
NJ313
NJ314
NJ315
NJ316
NJ317
NJ318
NJ319
NJ320
NJ321
NJ322
NJ324
NJ326
NJ328
NJ330
NJ2304E
NJ2305E
NJ2306E
NJ2307E
NJ2308
NJ2309
NJ2310
NJ2311
NJ2312
NJ2313
NJ2314
NJ2315
NJ2316
NJ2317
NJ2318
NJ2319
NJ2320
NJ2322
NJ2324
NJ2326
NJ2326E
NJ2328
| Bearing No. | ||||
| NU | NJ | NUP | N | NF |
| NU202 | NJ 202 | NUP203 | — | — |
| NU203 | NJ 203 | NUP203 | N203 | NF203 |
| NU2203E | NJ2203E | |||
| NU204 | NJ204 | NUP204 | N204 | NF204 |
| NU204E | NJ204E | NUP204E | — | — |
| NU2204 | NJ2204 | NUP2204 | N2204 | — |
| NU2204E | NJ2204E | NUP2204E | N304 | — |
| NU304 | NJ30 | NUP304 | — | NF304 |
| NU304E | NJ304E | NUP304E | N2304 | — |
| NU2304 | NJ2304 | NUP2304 | — | — |
| NU2304E | NJ2304E | NUP2304E | N1005 | — |
| NU1005 | NJ1005 | NUP1005 | N205 | — |
| NU205 | NJ205 | NUP205 | — | NF205 |
| NU205E | NJ205E | NUP205E | N2205 | — |
| NU2205 | NJ2205 | NUP2205 | — | — |
| NU2205E | NJ2205E | NUP2205E | N305 | — |
| NU305 | NJ305 | NUP305 | — | NF305 |
| NU305E | NJ305E | NUP305E | N2305 | — |
| NU2305 | NJ2305 | NUP2305 | — | — |
| NU2305E | NJ2305E | NUP2305E | N405 | — |
| NU405 | NJ405 | NUP405 | N1006 | NF405 |
| NU1006 | NJ1006 | NUP1006 | N206 | — |
| NU206 | NJ206 | NUP206 | — | NF206 |
| NU206E | NJ206E | NUP206E | N2206 | — |
| NU2206 | NJ2206 | NUP2206 | — | — |
| NU2206E | NJ2206E | NUP2206E | — | — |
| NU306 | NJ306 | NUP306 | N306 | NF306 |
| NU306E | NJ306E | NUP306E | N2306 | — |
| NU2306 | NJ2306 | NUP2306 | — | — |
| NU2306E | NJ2306E | NUP2306E | — | — |
| NU1007 | NJ1007 | NUP1007 | N1007 | |
| NU406 | NJ406 | NUP406 | N406 | NF406 |
| NU207 | NJ207 | NUP207 | — | NF207 |
| NU207E | NJ207E | NUP207E | N2207 | — |
| NU2207 | NJ2207 | NUP2207 | — | — |
| NU2207E | NJ2207E | NUP2207E | N307 | — |
| NU307 | NJ307 | NUPP307 | — | NF307 |
| NU307E | NJ307E | NUP307E | N2307 | — |
| NU2307 | NJ2307 | NUP2307 | — | — |
| NU2307E | NJ2307E | NUP2307E | N407 | — |
| NU407 | NJ407 | NUP407 | — | NF407 |
| NU1008 | NJ1008 | NUP1008 | N1008 | — |
| NU208 | NJ208 | NUP208 | N208 | NF208 |
| NU208E | NJ208E | NUP208E | — | — |
| NU2208 | NJ2208 | NUP2208 | N2208 | — |
| NU2208E | NJ2208E | NUP2208E | — | — |
| NU308 | NJ308 | NUP308 | N308 | NF308 |
| NU308E | NJ308E | NUP308E | — | — |
| NU2308 | NJ2308 | NUP2308 | N2308 | — |
| NU2308E | NJ2308E | NUP2308E | — | — |
| NU408 | NJ408 | NUP408 | N408 | NF408 |
| NU1009 | NJ1009 | NUP1009 | N1009 | — |
| NU209 | NJ209 | NUP209 | N209 | NF209 |
| NU209E | NJ209E | NUP209E | — | — |
| NU2209 | NJ2209 | NUP2209 | N2209 | — |
| NU2209E | NJ2209E | NUP2209E | — | — |
| NU309 | NJ309 | NUP309 | N309 | NF309 |
| NU309E | NJ309E | NUP309E | — | — |
| NU2309 | NJ2309 | NUP2309 | N2309 | — |
| NU2309E | NJ2309E | NUP2309E | — | — |
| NU409 | NJ409 | NUP409 | N409 | NF409 |
| NU1571 | NJ1571 | NUP1571 | N1571 | — |
| NU210 | NJ210 | NUP210 | N210 | NF210 |
| NU210E | NJ210E | NUP210E | — | — |
| NU2210 | NJ2210 | NUP2210 | N2210 | — |
| NU2210E | NJ2210E | NUP2210E | — | — |
| NU310 | NJ310 | NUP310 | N310 | NF310 |
| NU310E | NJ310E | NUP310E | — | — |
| NU2310 | NJ2310 | NUP2310 | N2310 | — |
| NU2310E | NJ2310E | NUP2310E | — | — |
| NU410 | NJ410 | NUP410 | N410 | NF411 |
| NU1011 | NJ1011 | NUP1011 | N1011 | — |
| NU211 | NJ211 | NUP211 | N211 | NF211 |
| NU211E | NJ211E | NUP211E | — | — |
| NU2211 | NJ2211 | NUP2211 | N2211 | — |
| NU2211E | NJ2211E | NUP2211E | — | — |
| NU311 | NJ311 | NUP311 | N311 | NF311 |
| NU311E | NJ311E | NUP311E | — | — |
| NU2311 | NJ2311 | NUP2311 | N2311 | — |
| NU2311E | NJ2311E | NUP2311E | — | — |
| NU411 | NJ411 | NUP411 | N411 | NF411 |
| NU1012 | NJ1012 | NUP1012 | N1012 | — |
| NU212 | NJ212 | NUP212 | N212 | NF212 |
| NU212E | NJ212E | NUP212E | — | — |
| NU2212 | NJ2212 | NUP2212 | N2212 | — |
| NU2212E | NJ2212E | NUP2212E | — | — |
| NU312 | NJ312 | NUP312 | N312 | NF312 |
| NU312E | NJ312E | NUP312E | — | — |
| NU2312 | NJ2312 | NUP2312 | N2312 | — |
| NU2312E | NJ2312E | NUP2312E | — | — |
| NU412 | NJ412 | NUP412 | N412 | NF412 |
| NU1013 | NJ1013 | NUP1013 | N1013 | — |
| NU213 | NJ213 | NUP213 | N213 | NF213 |
| NU213E | NJ213E | NUP213E | — | — |
| NU2213 | NJ2213 | NUP2213 | N2213 | — |
| NU2213E | NJ2213E | NUP2213E | — | — |
| NU313 | NJ313 | NUP313 | N313 | NF313 |
| NU313E | NJ313E | NUP313E | — | — |
| NU2313 | NJ2313 | NUP2313 | N2313 | — |
| NU2313E | NJ2313E | NUP2313E | — | — |
| NU413 | NJ413 | NUP413 | N413 | NF413 |
| NU1014 | NJ1014 | NUP1014 | N1014 | — |
| NU214 | NJ214 | NUP214 | N214 | NF214 |
| NU214E | NJ214E | NUP214E | — | — |
| NU2214 | NJ2214 | NUP2214 | N2214 | — |
| NU2214E | NJ2214E | NUP2214E | — | — |
| NU314 | NJ314 | NUP314 | N314 | NF314 |
| NU314E | NJ314E | NUP314E | — | — |
| NU2314 | NJ2314 | NUP2314 | N2314 | — |
| NU2314E | NJ2314E | NUP2314E | — | — |
| NU414 | NJ414 | NUP414 | N414 | NF414 |
| NU1015 | NJ1015 | NUP1015 | N1015 | — |
| NU215 | NJ215 | NUP215 | N215 | NF215 |
| NU215E | NJ215E | NUP215E | — | — |
| NU2215 | NJ2215 | NUP2215 | N2215 | — |
| NU2215E | NJ2215E | NUP2215E | — | — |
| NU315 | NJ315 | NUP315 | N315 | NF315 |
| NU315E | NJ315E | NUP315E | — | — |
| NU2315 | NJ2315 | NUP2315 | N2315 | — |
| NU2315E | NJ2315E | NUP2315E | — | — |
| NU415 | NJ415 | NUP415 | N415 | NF415 |
| NU1016 | NJ1016 | NUP1016 | N1016 | — |
| NU216 | NJ216 | NUP216 | N216 | NF216 |
| NU216E | NJ216E | NUP216E | — | — |
| NU2216 | NJ2216 | NUP2216 | N2216 | — |
| NU2216E | NJ2216E | NUP2216E | — | — |
| NU316 | NJ316 | NUP316 | N316 | NF316 |
| NU316E | NJ316E | NUP316E | — | — |
| NU2316 | NJ2316 | NUP2316 | N2316 | — |
| NU2316E | NJ2316E | NUP2316E | — | — |
| NU416 | NJ416 | NUP416 | N416 | NF416 |
| NU1017 | NJ1017 | NUP1017 | N1017 | — |
| NU217 | NJ217 | NUP217 | N217 | NF217 |
| NU217E | NJ217E | NUP217E | — | — |
| NU2217 | NJ2217 | NUP2217 | N2217 | — |
| NU2217E | NJ2217E | NUP2217E | — | — |
| NU317 | NJ317 | NUP317 | N317 | NF317 |
| NU317E | NJ317E | NUP317E | — | — |
| NU2317 | NJ2317 | NUP2317 | N2317 | — |
| NU2317E | NJ2317E | NUP2317E | — | — |
| NU417 | NJ417 | NUP417 | N417 | NF417 |
| NU1018 | NJ1018 | NUP1018 | N1018 | — |
| NU218 | NJ218 | NUP218 | N218 | NF218 |
| NU218E | NJ218E | NUP218E | — | — |
| NU2218 | NJ2218 | NUP2218 | N2218 | — |
| NU2218E | NJ2218E | NUP2218E | — | — |
| NU318 | NJ318 | NUP318 | N318 | NF318 |
| NU318E | NJ318E | NUP318E | — | — |
| NU2318 | NJ2318 | NUP2318 | N2318 | — |
Applications of Spline Couplings
A spline coupling is a highly effective means of connecting 2 or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.
Optimal design
The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.
Characteristics
An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is 1 of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.
Applications
Spline couplings are a type of mechanical joint that connects 2 rotating shafts. Its 2 parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on 1 side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.
Predictability
Spindle couplings are used in rotating machinery to connect 2 shafts. They are composed of 2 parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is 1 X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between 2 spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.
