for new t echnology network r sealed self-aligning roller bearings wa type patent pending corporation
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ntn sealed self-aligning roller bearings wa type lengthens operating time between maintenance inspections in contaminated environments general the high load capacity of self-aligning roller bearings and their easy adaptability to a variety of applications has led to increased use in nearly every industry compact sealed self-aligning roller bearings have been developed by ntn specifically to address the need for longer operating times between periodic maintenance inspections and relubrication patent pending special characteristics highly efficient at preventing infiltration of contaminants the adoption of a specially designed rubber contact seal dramatically increases contaminant-blocking efficiency compared to open-type seals this also enables bearings to operate longer between maintenance inspections and relubrication although bearings are sealed relubrication is possible outer rings are provided standard with oil grooves and oil holes enabling direct relubrication of inner bearing c
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bearing diagram cross-sectional diagram of plummer block structure 1 bore diameter and outer diameter dimensions are the same as series 222 width dimensions are somewhat wider dimensional accuracy and running accuracy are jis class 0 2 internal dimensions are the same as series 222b and therefore basic rated loads are also the same 3 outer rings are provided with oil grooves and oil holes standard 4 seals are designed to maintain an ideal degree of contact pressure with the outer surface of the inner ring 5 the bearings are packed 25 35 of inside free space of bearing with lithium mineral grease allowable temperature range please use bearings within their allowable temperature range of -25 to +120°c allowable rotational speeds relubrication type dn 6 x 104 with relubrication 100 grease-packed pre packed type dn 8 x 104 with lubrication level as packed and shipped d inner bore diameter dimension mm x n operating speed rpm
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sealed self-aligning roller bearings wa type dimension table brrddd cylindrical bore tapered bore bearing no tapered bore1 wa22212bllsk wa22213bllsk wa22214bllsk wa22215bllsk wa22216bllsk wa22217bllsk wa22218bllsk wa22219bllsk wa22220bllsk wa22222bllsk wa22224bllsk wa22226bllsk wa22228bllsk wa22230bllsk wa22232bllsk boundary dimensions dynamic 2 basic load ratings static dynamic cor 147 179 201 223 239 272 345 390 415 570 700 790 975 1 160 1 290 11 14 15 16 18 21 26 30 32 42 49 58 70 79 88 cr 700 600 700 900 300 000 200 000 000 000 500 000 000 000 500 static cor 15 18 20 22 24 27 35 39 42 58 71 80 99 119 132 000 300 500 800 400 800 000 500 500 000 500 500 500 000 000 cylindrical bore wa22212blls wa22213blls wa22214blls wa22215blls wa22216blls wa22217blls wa22218blls wa22219blls wa22220blls wa22222blls wa22224blls wa22226blls wa22228blls wa22230blls wa22232blls d 60 65 70 75 80 85 90 95 100 110 120 130 140 150 160 d 110 120 125 130 140 150 160 170 180 200 215 230 250 270 290 b 36 39 39
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ra ra da da equivalent radial bearing load dynamic pr xfr yfa fa fa e fr fr exyxy 1 y1 0.67 y2 equivalent radial bearing load static por fr yofa for values e y1 y2 and yo see table below abutment and fillet dimensions mm da da ras constant axial load coefficient mass ref kg min 68.5 73.5 78.5 83.5 90 95 100 107 112 122 132 144 154 164 174 max 74.5 80 84 89.5 94.5 101 107 114 119 133 147 154 168 185 197 max 101.5 111.5 116.5 121.5 130 140 150 158 168 188 203 216 236 256 276 max 1.5 1.5 1.5 1.5 2 2 2 2 2 2 2 2.5 2.5 2.5 2.5 e 0.27 0.28 0.26 0.24 0.26 0.26 0.26 0.26 0.26 0.27 0.27 0.28 0.28 0.27 0.28 y1 2.49 2.42 2.55 2.81 2.64 2.60 2.55 2.63 2.55 2.51 2.47 2.39 2.39 2.46 2.42 y2 3.71 3.60 3.80 4.19 3.93 3.88 3.80 3.92 3.80 3.74 3.68 3.56 3.55 3.66 3.60 y0 2.44 2.37 2.50 2.75 2.58 2.55 2.49 2.57 2.49 2.46 2.42 2.33 2.33 2.40 2.37 cylindrical tapered bore bore 1.41 1.80 1.91 2.06 2.51 3.08 4.08 4.71 6.01 8.87 11.2 12.5 16.9 22.6 28.0 1.37 1.76 1.86 2.00 2.45 3.01 3.97 4.59 5.83 8.60 10.9
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performance test data 1 heat run test test conditions bearing :wa22216bllsk load lubrication :radial load 980n {100kgf :grease alvania no 3 test results temperature rise bearing temperature room temperature °c 100 injected grease volume :30 of inside free space of bearing 100 of inside free space of bearing room temperature :25°c operating time :until temperature rise stabilizes 80 60 40 20 0 500 1 000 1 250 rotational speed 1 500 rpm with grease volume 100 of inside free space of bearing with grease volume 30 of inside free space of bearing 2 dust contamination resistance test test conditions bearing :wa22216bllsk sealed type 22216bk open type load :radial load 196n {20kgf rotational speed :500 rpm lubrication :grease alvania no 3 dust :breeze 20wt mixed with grease inside housing operating time :760 hours approx 1 month before the test test results sealed-type bearing after testing unchanged from pre-test condition open-type bearing after testing change in grease color due to contam
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handling precautions 1 because the internal radial clearance of sealed self-aligning roller bearings with tapered bores cannot be measured with a thickness gauge please monitor clearances after assembly using the values for axial direction runout as shown in table 1 2 in cases where two fixing rings are used with a plummer block please use one fixing ring on each side of the bearing 3 during assembly if misalignment exceeding the allowable misalignment angle of 0.5° is applied to the bearing rollers may come in direct contact with seals causing seal deformation furthermore if additional force is applied under these conditions seals may separate from the bearing entirely therefore caution is advised 4 please be sure to apply plenty of grease to the inside free space of the plummer block when installing the bearing refer to table 2 for recommended grease volumes 5 please use lithium mineral grease for cases where other types of grease are to be used please consult ntn 6 if a shrink fit
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