S71930 CD/P4A

These super-precision, high-capacity, single row angular contact ball bearings, with 15° contact angle, with seals, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures. Very high running accuracy Very high load carrying capacity Relatively high speed and stiffness Non-contact seals Integral sealing prolongs bearing service life

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Product Introduction

Dimensions - S71930 CD/P4A

Dimensions

d	150 mm	Bore diameter
D	210 mm	Outside diameter
B	28 mm	Width
d₁	168.5 mm	Shoulder diameter of inner ring (large side face)
d₂	168.5 mm	Shoulder diameter of inner ring (small side face)
D₂	195.15 mm	Recess diameter of outer ring (large side face)
r_1,2	min.2 mm	Chamfer dimension
r_3,4	min.1 mm	Chamfer dimension
a	38.2 mm	Distance from side face to pressure point

Abutment dimensions - S71930 CD/P4A

Abutment dimensions

d_a	min.159 mm	Diameter of shaft abutment
d_a	max.167.7 mm	Diameter of shaft abutment
d_b	min.159 mm	Diameter of shaft abutment
d_b	max.167.7 mm	Diameter of shaft abutment
D_a	max.201 mm	Diameter of housing abutment
D_b	max.205 mm	Diameter of housing abutment
r_a	max.2 mm	Radius of fillet
r_b	max.1 mm	Radius of fillet

Calculation data

Basic dynamic load rating	C	114 kN
Basic static load rating	C₀	132 kN
Fatigue load limit	P_u	4.15 kN
Attainable speed for grease lubrication		6 300 r/min
Contact angle	α	15 °
Ball diameter	D_w	19.05 mm
Number of rows	i	1
Number of balls (per bearing)	z	23

Preload and stiffness (back-to-back, face-to-face)
Preload, class A	G_A	470 N
Axial stiffnes for preload A (sets of two brgs back to back or face to face)		142 N/µm
Preload, class B	G_B	940 N
Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face)		195 N/µm
Preload, class C	G_C	1 880 N
Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face)		276 N/µm
Preload, class D	G_D	3 760 N
Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face)		405 N/µm

Correction factors for preload calculation
Correction factor dependent on bearing series and size	f	1.24
Correction factor dependent on contact angle	f₁	1
Correction factor, preload class A	f_2A	1
Correction factor, preload class B	f_2B	1.04
Correction factor, preload class C	f_2C	1.09
Correction factor, preload class D	f_2D	1.15
Correction factor for hybrid bearings	f_HC	1

Factors for equivalent bearing load calculation
Calculation factor for equivalent loads	f₀	16.2
Additional factors for equivalent loads		Refer to Notes 1 and 2 below

QQ20241120113432

NO.	d[mm]	D[mm]	B[mm]
S71930 CD/P4A	150	210	28
S71930 ACDGA/P4A	150	210	28
S71930 ACDGA/HCP4A	150	210	28
S71930 ACD/P4ADBB	150	210	56
S71930 ACD/P4A	150	210	28
S71930 ACD/HCPA9AQGA	150	210	112
S71930 ACD/HCP4ATGA	150	210	84
S7028 CD/P4ATBTA	140	210	99
S7028 CD/P4AQBCC	140	210	132
S7028 CD/P4AQBCA	140	210	132
S7028 CD/P4A	140	210	33
S7028 ACDGA/P4A	140	210	33
S7028 ACD/P4ATBTA	140	210	99
S7028 ACD/P4ADGC	140	210	66
S7028 ACD/P4ADGA	140	210	66
S7028 ACD/P4A	140	210	33
71930 CDGC/P4A	150	210	28
71930 CDGA/P4A	150	210	28
71930 CDGA/HCP4A	150	210	28
71930 CD/P4ATBTA	150	210	84
71930 CD/P4ADGC	150	210	56
71930 CD/P4ADGB	150	210	56
71930 CD/P4ADGA	150	210	56
71930 CD/P4ADBA	150	210	56
71930 CD/P4A	150	210	28
71930 CD/HCP4A	150	210	28
71930 ACDGC/P4A	150	210	28
71930 ACDGC/HCP4A	150	210	28
71930 ACDGA/P4A	150	210	28
71930 ACDGA/HCP4A	150	210	28

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7028 ACD/P4A

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