Tolerances for Tapered Bores (Class: Normal) 2

• Tapered Bore, Taper 1:12
• Tapered Bore, Taper 1:30

  d :	Nominal Bore Diameter
  d 1 :	Bore Tapered End Larger of Diameter Taper 1:12  d 1 = d + 1/12 B Taper 1:30  d 1 = d + 1/30 B
  Δd mp :	Single Plane Mean Bore Diameter Deviation in Theoretical Diameter of Smaller End of Bore
  Δd 1mp :	Single Plane Mean Bore Diameter Deviation in Theoretical Diameter of Larger End of Bore
  V dp :	Outside diameter variation in a single radial plane
  B :	Nominal Inner Ring Width
  	Half of Taper Angle of Tapered Bore
  	Taper 1:12 =2 °3'9.4" =2.385 94 ° =0.041 643 rad	Taper 1:30 =57'17.4" =0.95484 ° =0.016665 rad

  
  

  Tapered Bore, Taper 1:30 - Units :

  d (mm)		Δd mp		Δd 1mp - Δ d mp		V dp(1)(2)
  over	incl	high	low	high	low	max
  +20	0	+35	0	22
  +25	0	+40	0	40
  +30	0	+46	0	46
  +35	0	+52	0	52
  +40	0	+57	0	57
  +45	0	+63	0	63
  +50	0	+70	0	70

  Notes:
  (1)Applicable to all radial planes of tapered bores.
  (2)Not applicable to diameter series 7 and 8.

• Bearing Tolerance Standards
• Bearing Types and Applicable Tolerance Classes
• Bearing Dimensional Accuracy and Running Accuracy
• Chamfer Dimension Limits
• Tolerances for Tapered Bores (Class : Normal)
• Selection of Accuracy Classes