RADIAL NEEDLE ROLLER AND CAGE ASSEMBLIES

Transcription

1 RADIAL NEEDLE ROLLER AND CAGE AEMBLIE

2 Technical features Radial needle roller and cage assemblies have a steel cage that provides both inward and outward retention for the needle rollers. The designs provide maximum cage strength consistent with the inherent high loadratings of needle roller bearings. Accurate guidance of the needle rollers by the cage bars allows for operation at high speeds. Needle roller and cage assemblies have either one or two rows of needle rollers. Also listed are needle roller and cage assemblies using molded, one-piece glass-reinforced engineered polymer cages (suffix TN). These operate well at temperatures up to 120 C over extended periods. owever, care should be exercised when these assemblies are lubricated with oils containing additives as service life may be reduced if the operating temperature exceeds 100 C. At such high temperatures oil can deteriorate with time and it is suggested that oil change intervals are observed. TYPE OF RADIAL NEEDLE ROLLER AND CAGE AEMLIIE Needle rollers with relieved ends used in these assemblies are made of high-carbon chrome steel, through-hardened, ground and lapped to close tolerances for diameter and roundness. Reference standards are: IO needle roller bearings - radial needle roller and cage assemblies - boundary dimensions and tolerances. DIN 5405 ection 1 - rolling bearings - needle roller bearings - radial needle roller and cage assemblies. ANI/ABMA needle roller bearings radial, metric design. UFFIXE TN ZW TNZW F F FV... ZW molded cage of reinforced engineered polymer double-row molded cage of reinforced engineered polymer - double-row hardened steel cage machined cage machined cage, case hardened machined cage, hardened and tempered DIMENIONAL ACCURACY Needle roller groups Radial needle roller and cage assemblies are supplied with needle roller complements subdivided into groups. The groups are decided by Nadella if not differently decided during the order and with Grade G2 specified in IO 3096 standard (see needle rollers, page 195). The needle roller and cage assemblies of one shipment usually contain needle rollers with group limits of between 0 to -2, and -5-7 μm. For needle roller and cage assemblies with needle rollers of different group limits contact Technical ervice Nadella. 38

3 Technical features MOUNTING DIMENION Design of raceways Radial needle roller and cage assemblies use the housing bore as the outer raceway and the shaft as the inner raceway. To realize full bearing load rating and life, the housing bore and the shaft raceways must have the correct geometric and metallurgical characteristics. The housing should be of sufficient cross section to maintain adequate roundness and running clearance under load. Additional design details for housings and shafts used as outer and inner raceways can be found in the MOUNTING section of this catalogue. The only limit to precision of the radial clearance of a mounted assembly is the capability of the user to hold close tolerances on the inner and outer raceways. The suggested shaft tolerances are based on housing bore tolerance G6 and apply to metric series radial needle roller and cage assemblies with needle rollers of group limits between and uggested shaft tolerances for housing bores machined to G6 Nominal shaft diameter in 80 >80 Radial clearance tolerance maller than normal j5 h5 Normal h5 g5 Larger than normal g6 f6 Axial guidance requirements Radial needle roller and cage assembly must be axially guided by shoulders or other suitable means. The end guiding surfaces should be hardened to minimize wear and must provide sufficient axial clearance to prevent end-locking of the assembly. Length tolerance 11 is suggested on dimension BC. If end guidance is provided by a housing shoulder at one end and by a shaft shoulder at the other end, the shaft must be axially positioned to prevent end-locking of needle roller and cage assembly. The housing and shaft shoulder heights should be 70 percent to 90 percent of the needle roller diameter to provide proper axial guidance. 11 Guidance in the housing 11 Guidance in the shaft Mounting in sets Radial needle roller and cage assemblies that are mounted side by side must have needle rollers of the same group limits to ensureuniform load distribution. LUBRICATION Oil is the preferred lubricant for most applications. In critical applications involving high speeds, ample oil flow must be provided. Where assemblies are subjected to high centrifugal forces such as in epicyclic gearing, or inertia forces, as in the small end of a connecting rod the contact pressure between the cage and the raceway guiding surface becomes critical. The allowable contact pressure depends on a combination of the induced force and the relative velocity between the cage and raceway and the rate of lubricant flow. Consult the Nadella Technical ervice when cages will be subjected to high induced forces. PECIAL DEIGN Radial needle roller and cage assemblies made to special dimensions or configurations such as those which are split to assemble around a one-piece crankshaft can be made available on special order. pecial coated or plated cages to enhance life, under conditions of marginal lubrication and high induced forces, also can be made available. 39

4 raceway surfaces to be 58 RC X7X7TN 1145X8X8TN 1145X8X10TN 1145X9X13TN 1146X9X8 1146X9X8TN 1146X9X10TN 1147X10X8TN 1147X10X10TN 1147X11X15TN 1148X11X8FV 1148X11X8TN 1148X11X X11X10FV 1148X11X10TN 1148X11X13TN 1148X11X X12X10F 1149X12X10FV 1149X12X13F 1149X12X13FV 1149X13X X13X X13X10TN 11410X13X X13X X14X X14X X16X12F 11410X16X12TN ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

5 raceway surfaces to be 58 RC X15X X15X X16X X17X X18X X17X X18X15F 11414X18X X18X X18X X18X X18X X19X X19X18F 11414X20X X18X14TN 11415X18X16F 11415X18X X19X X19X X19X X19X22ZW 11415X20X X21X X21X21 ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

6 raceway surfaces to be 58 RC X20X8F 11416X20X X20X X20X X20X X20X X22X X22X X22X X24X X20X X21X X21X X21X X21X X22X20F 11417X23X15F 11418X22X8F 11418X22X X22X X22X X22X14FV 11418X22X X22X20F 11418X24X X24X X25X X26X12FV 11418X26X20F ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

7 raceway surfaces to be 58 RC ZW B c Load ratings kn peed rating F w Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil X23X X23X X24X8F X24X X24X X24X X24X X24X X26X X26X X26X X26X X28X X28X X30X X32X X25X X26X X26X X26X X26X X28X X28X X30X X30X20FV X32X24F X32X

8 raceway surfaces to be 58 RC X28X24F 11423X35X X28X X28X X28X16F 11424X28X X30X10TN 11424X30X X30X X36X X29X X29X X29X X30X X30X X30X X30X X30X X30X26ZW 11425X31X X31X X31X X31X X32X X33X X33X X33X X35X23, X35X X35X X35X X37X20 ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

9 raceway surfaces to be 58 RC X30X10F 11426X30X X30X X30X22ZW 11428X32X21F 11428X33X13F 11428X33X13F 11428X33X X33X X34X X34X X35X X35X X35X X36X20FV 11428X38X25, X40X X40X X40X X41X X34X X35X X35X X35X X35X23F 11430X35X X35X27ZW 11430X36X X34X27F ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. C C 0 Grease Oil Min. 45

10 raceway surfaces to be 58 RC X37X X40X X42X X44X X36X15F 11432X37X X37X X37X X38X X38X X39X X39X X40X X40X X42X X46X X46X X46X X38X X44X26F 11435X40X X40X X40X19F 11435X40X X40X X40X X42X X42X X51X23 ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

11 raceway surfaces to be 58 RC X42X X42X30F 11435X45X20F 11435X45X30F 11435X45X X45X X45X X45X49ZW 11435X50X40F 11436X40X29TN 11436X42X X42X X42X X42X27F 11437X44X X41X9TN 11438X43X X43X X46X X46X X50X X50X X50X40F 11440X45X X45X X45X X45X X45X27TN 11440X45X29 ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

12 raceway surfaces to be 58 RC ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil 11440X46X X47X X47X X48X20FV X48X X48X X50X X55X X56X X48X31ZW X47X X47X X47X X48X24F X50X X50X X50X X48X17F X48X X50X X50X30,5ZW X50X X50X X50X X50X20F X50X21C X50X27F X50X27TN X52X

13 raceway surfaces to be 58 RC ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil 11445X52X21F X53X X53X X53X25F X53X X55X X59X X59X18TN X59X X60X X60X X53X36ZW X52X15F X52X X52X X55X28FV X53X X54X X55X32ZW X65X X55X X55X X55X X55X30FV X56X X57X18F X58X X58X

14 raceway surfaces to be 58 RC X58X X62X X66X X70X X57X X57X X60X X60X X60X X60X X60X30F 11455X61X X62X X63X15F 11455X63X X63X X63X X55X X63X17F 11458X64X X65X X65X X65X27F 11460X65X30F 11460X65X X68X17F 11460X68X X68X X68X X68X30ZW ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil

15 raceway surfaces to be 58 RC ZW Load ratings kn peed rating Dynamic tatic Max. Min. Max. C C 0 Grease Oil X71X X70X X70X20C X70X X73X X73X X74X20F X74X28C X74X X74X35ZW X76X X82X X76X X76X X78X X78X23F X78X25F X78X X78X46ZW X85X40F X88X X80X X81X20F X83X X83X X83X30F X86X X88X25FV X88X X79X Min. 51

16 raceway surfaces to be 58 RC ZW X92X X93X25F 11485X93X X97X X98X25F Load ratings kn peed rating Dynamic tatic Max. Min. Max. Min. C C 0 Grease Oil " X98X X103X X103X30F X108X X118X X118X