ntn plummer blocks 1
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plummer block and rolling bearing tolerances 2.2 machining tolerances of mounting bolt seat faces when subjected to a greater lateral load a plummer block cannot be reliably secured with the tightening force of mounting bolts alone to overcome this problem the end faces of the mounting bolt seat are secured with stoppers to lock the plummer block with the plummer block used in this type of application the end faces in contact with the stoppers are machined when a plummer block mounting seat end faces have been machined the bottom length l of the bearing housing is smaller by the dimension in table 2.5 l basic casting dimension as cast dimension l dimension after machining of the end faces of bearing base table 2.5 machining allowance plummer block part number sn506 sn519 sn206 sn219 snz206 snz219 sn606 sn616 sn306 sn316 snz306 snz316 sv505 sv205 sv605 sv305 sn520 sn220 snz220 sn617 sn317 snz317 model sn30 model sn31 model sn f model sd sv520 sv220 sv617 sv317 sv519 sv219 sv616 sv316 3
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plummer block and bearing materials table 3.2 plummer block accessories materials accessory tightening bolt and nut spring washer grease nipple on housing plug for relubrication or draining stabilizing ring general purpose normal width material used class 2 rolled steel for general structure hard drawn steel wire copper and copper alloy rod and bar class 2 rolled steel for general structure class 3 gray cast iron and class 2 zinc die-casting class 2 rolled steel for general structure symbol ss400 swrh62b c3604b ss400 fc200 zdc2 ss400 applicable jis standard g3101 g3506 h3250 g3101 g5501 h5301 g3101 3.2 bearing materials raceway and rolling element materials when the contact surfaces of a bearing raceway and rolling elements are repeatedly subjected to heavy stress they still must maintain high precision and running accuracy to accomplish this the raceway and rolling elements must be made of a material that has high hardness is resistant to rolling fatigue is wear resistant and has good
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bearing seals 3 s grease seal fig 6.3 the s grease seal synthetic rubber seal with spring excels in sealing performance and is well suited for grease or oil lubrication custom specification variants can be used in a plummer block its recommended peripheral speed falls within a range of 10 to 12 m/s the surface roughness and hardness of the shaft in contact with this sealing material necessitates special attention fig 6.5 special labyrinth seal shaft design specification for the area in contact with the seal the quality of a shaft section in contact with the seal lip greatly affects the sealing performance of the seal therefore strictly adhere to the design standard for shafts in table 6.2 table 6.2 shaft design standard fig 6.4 labyrinth seal criterion hardness design standard hrc30 40 0.8ra or smaller the end face to which a seal is fitted must be tapered and the sharp corner must be rounded the finish surface should be finish-ground without infeed remarks 6.2 non-contact seals 1 laby
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handling the plummer blocks and bearings 9.3.1 bearing with an adapter 1 thinly apply highly viscous mineral oil to the taper threading and the chamfered face of the nut see fig 9.10 before press-fitting in particular apply molybdenum bisulfide paste to these areas on a large bearing this prevents scuffing and allows easy bearing removal before the installation work remove oil from the shaft and the bore face of sleeve with a clean factory cloth the slit with a flat-blade screwdriver for easy fitting fig 9.11 fig 9.11 fig 9.10 2 mount the adapter to a correct position considering the dimension b1 b2 or b3 in the bearing table when fitting the adapter sleeve onto the shaft open 3 fit the bearing over the adapter sleeve on the shaft as tight as possible so that the bearing inner ring is fully seated onto the taper on adapter sleeve 4 lightly tighten the nut until the sleeve is seated on the shaft 5 when fully tightening a self-aligning ball bearing make sure that its radial clearance bec
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handling the plummer blocks and bearings 9.8 cleaning the bearing clean the removed bearing with diesel oil or kerosene use two vessels one for rough cleaning and the other for finish cleaning prepare a cleaning station that has a metal screen as illustrated in fig 9.31 so that the bearing does not directly contact the fouling on the bottom of vessel in rough cleaning virtually all oil and foreign matters should be removed from the bearing which should be immediately transferred to the finish vessel the finish vessel must be provided with a filter unit to maintain the cleaning agent clean once cleaned the bearing must be immediately rustproofed the bearings which have been carefully removed must be checked whether they can be reused the judging criterion for reuse should be determined considering the following criteria through a trial-and-error basis 1 scheduled operating duration to next regular inspection 2 importance of the machine that uses the bearing in question 3 operating condi
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plummer blocks sn30 sn31 a g a/2 y d1 d x x mass kg approx nominal number spherical roller bearings setting washer 1 number approx mm y2 seal number shaft dia mm d1 17 20 25 30 33 46 52 52 23024bk;h3024x 23026bk;h3026 23028bk;h3028 23030bk;h3030 23032bk;h3032 23034bk;h3034 23036bk;h3036 23038bk;h3038 sr180x10 sr200x10 sr210x10 sr225x10 sr240x10 sr260x10 sr280x10 sr290x10 1 1 1 1 1 1 1 1 47 51 53 56 61 66 70 72 zf24 zf26 zf28 zf30 zf32 zf34 zf36 zf38 110 115 125 135 140 150 160 170 18 21 26 32 40 45 51 63 76 23122bk;h3122x 23124bk;h3124x 23126bk;h3126 23128bk;h3128 23130bk;h3130 23132bk;h3132 23134bk;h3134 23136bk;h3136 23138bk;h3138 sr180x10 sr200x10 sr210x10 sr225x10 sr250x10 sr270x10 sr280x10 sr300x10 sr320x10 1 1 1 1 1 1 1 1 1 51 55 57 60 68 74 76 81 86 zf22 zf24 zf26 zf28 zf30 zf32 zf34 zf36 zf38 100 110 115 125 135 140 150 160 170 3 dimension x indicates a deviation of the bearing center relative to the plummer block center and its value is 1/2 the width of the setting washer 39
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plummer blocks sd5 sd5g sd6 sd6g a g a/2 y d1 d mass kg approx nominal number spherical roller bearings approx mm y2 seal number shaft dia mm d1 95 110 130 150 210 240 320 370 460 560 22234bk;h3134 22236bk;h3136 22238bk;h3138 22240bk;h3140 22244bk;h3144 22248bk;h3148 22252bk;h3152 22256bk;h3156 22260bk;h3160 22264bk;h3164 75 76 80 84 90 98 105 107 114 122 zf34 zf36 zf38 zf40 zf44 zf48 zf52 zf56 zf60 zf64 150 160 170 180 200 220 240 260 280 300 150 180 210 240 300 370 460 560 22334bk;h2334 22336bk;h2336 22338bk;h2338 22340bk;h2340 22344bk;h2344 22348bk;h2348 22352bk;h2352 22356bk;h2356 92 96 100 104 109 116 123 130 zf34 zf36 zf38 zf40 zf44 zf48 zf52 zf56 150 160 170 180 200 220 240 260 45
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plummer blocks sd2 sd2g sd3 sd3g a g a/2 y d2 d d3 d mass kg approx nominal number spherical roller bearings approx mm y2 seal number nut washer d2 d3 shaft dia mm d 95 110 130 150 210 240 320 370 460 560 22234b 22236b 22238b 22240b 22244b 22248b 22252b 22256b 22260b 22264b an34 an36 an38 an40 an44 an48 an52 an56 an60 an64 aw34 aw36 aw38 aw40 al44 al44 al52 al52 al60 al64 75 76 80 84 90 98 105 107 114 122 zf36 zf38 zf40 zf42 zf46 gs50 zf54 zf56 zf60 zf64 zf42 zf44 zf46 zf48 zf52 zf56 zf60 zf64 zf68 gs72 170 180 190 200 220 240 260 280 300 320 150 180 210 240 300 370 460 560 22334b 22336b 22338b 22340b 22344b 22348b 22352b 22356b an34 an36 an38 an40 an44 an48 an52 an56 aw34 aw36 aw38 aw40 al44 al44 al52 al52 92 96 100 104 109 116 123 130 zf36 zf38 zf40 zf42 zf46 gs50 zf54 zf56 zf42 zf44 zf46 zf48 zf52 zf56 zf60 zf64 170 180 190 200 220 240 260 280 51
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plummer blocks sv2 a g a2 y d2 d d3 d x x abutment and fillet dimensions mm g a2 h1 h2 approx s nominal number number mass kg setting washer 1 nominal number approx mm y3 seal number nut number 2 1 2 1 2 1 2 2 2 2 2 2 washer d2 d3 shaft dia mm d1 27 30 33 37 39 39 42 46 49 50 50 56 56 31 34 37.5 40.5 42.5 42.5 47 47 50 50 50 58 60 22 22 22 25 25 25 28 30 30 30 30 32 32 85 95 106 118 125 128 140 155 165 175 175 195 195 m14 m14 m14 m14 m14 m14 m14 m18 m18 m18 m18 m22 m22 2 2 2 2 2 2 2 2 2 2 2 2 2 2.0 2.6 3.1 4.3 4.3 4.6 5.5 6.5 9.5 10 10 14 15 sr 52x 6 sr 52x 9 sr 62x 7 sr 62x10 sr 72x 8 sr 72x10 sr 80x 9.5 sr 80x 7 sr 85x10 sr 85x 8 sr 90x 9.5 sr 90x 8 an05 an06 an07 an08 an09 an10 an11 an12 an13 an14 an15 an16 an17 aw05 aw06 aw07 aw08 aw09 aw10 aw11 aw12 aw13 aw14 aw15 aw16 aw17 17 19 18 20 19 22 21 23 22 24 24 25 zf 5 zf 6 zf 7 zf 8 zf 9 zf10 zf11 zf12 zf13 zf13 zf15 zf16 zf17 zf 7 zf 8 zf10 zf11 zf12 zf13 zf15 zf16 zf17 zf18 zf19 zf20 zf21 25 30 35 40 45 50 55 60 65 70 75 80 85 sr100
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