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B71909-E-2RSD-T-P4S （5）無保持架軸承
V-滿裝滾動體軸承。例：NU207V。 VT-帶隔離球或滾子的滿裝滾動體軸承。例：51120VT。
（6）公差等級（包括尺寸精度和旋轉精度）
P0-公差等級符合國際標準ISO規定的0級，代號中省略，不表示。 P6-公差等級符合國際標準ISO規定的6級。 P6X-公差等級符合國際標準ISO規定的6X級圓錐滾子軸承。 P5-公差等級符合國際標準ISO規定的5級。 P4-公差等級符合國際標準ISO規定的4級。 P2-公差等級符合國際標準ISO的2級（不包括圓錐滾子軸承）。 SP-尺寸精度相當于5級，旋轉精度相當于4級（雙列圓柱滾子軸承）。 UP-尺寸精度相當于4級，旋轉精度高于4級（雙列圓柱滾子軸承）。 HG-尺寸精度相當于4級，旋轉精度高于4級，低于2級（主軸軸承）。
SKF圓柱滾子軸承補充代號

d/ds公稱內徑/單一內徑(Nominal bore diameter/Single bore diameter)
dmp單一平面平均內徑(Mean bore diameter;arithmetical mean of the largest samallest single bore diamerers measured in one radial plane)
△dmp單一平面平均內徑偏差(dmp-d;Deviation of mean bore diameter from the nominal dimension)
△ds單一內徑偏差(ds-d;deviation of single bore diameter from the nominal dimension)
Vdp單一徑向平面內徑變動量(Bore diameter variation;difference between the largest & smallest single bore diameters in one radial plane)
Vdmp平均內徑變動量(dmp max-dmp min;Mean bore diameter variation;difference between the largest & smallest mean bore diameters)
D/Ds公稱外徑/單一外徑(Nominal outside diameter/Single outside diameter)
Dmp單一平面平均外徑(Mean outside diameter;arithmetical mean of the largest & smallest single outside diameters in one radial plane)
△Dmp單一平面平均外徑偏差(Dmp-D;Deviation of mean outside diameter from nominal dimension)
△Ds單一外徑偏差(Ds-D;Deviation of mean outside diameter from nominal dimension)
VDp單一徑向平面外徑變動量(Outside diameter variation;difference between the largest & smallest single outside diameter in one radial plane)
VDmp平均外徑變動量(Dmp max-Dmp min;Mean outside diameter variation;difference between the largest & smallest mean outside diameters)
Bs/Cs內圈/外圈單一寬度(Single inner ring/outer ring width)
△Bs內圈單一寬度偏差(Bs-B; Deviation of a single inner ring width from nominal dimension)
△Cs外圈單一寬度偏差(Cs-C; Deviation of a single outer ring width from nominal dimension)
VBs內圈寬度變動量(Bs max-Bs-min; Variation of inner ring widths; difference between the largest & smallest single inner ring width)
VCs外圈寬度變動量(Cs max-Cs min; Variation of outer ring widths; difference between the largest & smallest single outer ring width)
B,C,T軸承公稱寬度/高度(Nominal bearing width/height)
Ts軸承實際寬度/高度(Actual bearing width/height)
△Ts軸承實際寬度/高度偏差(Deviation of the actual bearing width/height)
Kia成套軸承內圈徑向跳動(Radial runout of assembled bearing inner ring)
Kea成套軸承外圈徑向跳動(Radial runout of assembled bearing outer ring)
Sd內圈基準端面對內圈的跳動(Side face runout of inner ring with reference to bore)