SKF 71934 CD/P4A Angular contact ball bearings, super-precision

SKF 71934 CD/P4A Angular contact ball bearings, super-precision
Angular contact ball bearings, super-precision

Tolerances: P4A, P4, PA9A, P2, Chamfer dimensionsRecommended shaft and housing fits: shafts, housingsValues for ISO tolerance classes: shafts, housingsSpeed dependent initial grease fill →Initial grease fillClamping and fitting forces: D design, E design, B design

Designation suffixes H, H1, L and L1identify variants for direct oil-air lubrication(→Variants).

d		170	mm
D		230	mm
B		28	mm
d1		188.5	mm
d2		188.5	mm
D1		211.5	mm
r1,2	min.	2	mm
r3,4	min.	1	mm
a		40.9	mm

Abutment dimensions

da	min.	179	mm
db	min.	179	mm
Da	max.	221	mm
Db	max.	225	mm
ra	max.	2	mm
rb	max.	1	mm
dn		193.5	mm

Calculation data

Basic dynamic load rating	C		133	kN
Basic static load rating	C0		166	kN
Fatigue load limit	Pu		5.1	kN
Attainable speed for grease lubrication			5600	r/min
Attainable speed for oil-air lubrication			8500	r/min
Ball diameter	Dw		19.05	mm
Number of balls	z		29
Reference grease quantity	Gref		36	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		500	N
Static axial stiffness, preload class A			171	N/µm
Preload class B	GB		1000	N
Static axial stiffness, preload class B			236	N/µm
Preload class C	GC		2000	N
Static axial stiffness, preload class C			334	N/µm
Preload class D	GD		4000	N
Static axial stiffness, preload class D			493	N/µm
Calculation factors
Calculation factor	f		1.3
Calculation factor	f1		1
Calculation factor	f2A		1
Calculation factor	f2B		1.04
Calculation factor	f2C		1.09
Calculation factor	f2D		1.15
Calculation factor	fHC		1
Calculation factor	f0		16.5

Mass

Mass bearing

2.85

kg

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