Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 708 CD/HCP4A

708 CD/HCP4A

Dimensions

d		8	mm
D		22	mm
B		7	mm
d₁		12.6	mm
d₂		12.6	mm
D₁		17.4	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		5.5	mm

Abutment dimensions

d_a	min.	10	mm
d_b	min.	10	mm
D_a	max.	20	mm
D_b	max.	20.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		13.6	mm

Calculation data

Basic dynamic load rating	C	3.25	kN
Basic static load rating	C₀	1.37	kN
Fatigue load limit	P_u	0.057	kN
Attainable speed for grease lubrication		110000	r/min
Attainable speed for oil-air lubrication		160000	r/min
Ball diameter	D_w	3.969	mm
Number of balls	z	9
Reference grease quantity	G_ref	0.15	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	10	N
Static axial stiffness, preload class A		12	N/µm
Preload class B	G_B	20	N
Static axial stiffness, preload class B		16	N/µm
Preload class C	G_C	40	N
Static axial stiffness, preload class C		21	N/µm
Preload class D	G_D	80	N
Static axial stiffness, preload class D		30	N/µm
Calculation factors
Calculation factor	f	1.02
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
Calculation factor	f_2C	1.05
Calculation factor	f_2D	1.09
Calculation factor	f_HC	1.02
Calculation factor	f₀	8.4

Mass

Mass bearing

0.011

Model Number: 708 CD/HCP4A
Inner Diameter：8mm Outer Diameter：22mm Width：7mm
Reference speed:- Limiting speed:-
Type：Bearings, units and housings Super-precision bearings Angular contact ball bearings Angular contact ball bearings, super-precision
Details： Angular contact ball bearings, super-precision
Update date：2024-12-13
Application:centrifugal pump,pump,electromagnet,magnetic elements,marine analysis,Machine tools,spring industry,baler,Medical equipment,lifting tackle,chuck industry
Similar models:708 CD/HCP4AH 708 ACD/HCP4A WBB1-8708 R-2Z PBM 708560 M1G1 7088 AM 7084 AM PBM 708590 M1G1 70876 AMB PWM 708070 PSM 708060 A51
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Model No.	Inner Diameter	Outer Diameter	Width	Type
12x37x7 HMS5 RG	12	37	7	Seals
16002/HR22T2	15	32	8	Bearings, units and housings
16x30x7 HMSA10 V	16	30	7	Seals
361840	730	940	100	Bearings, units and housings
430x480x16 HDS2 R	430	480	16	Seals
708 ACD/P4AH	8	22	7	Bearings, units and housings
BT4B 328203/HA1	419.1	590.55	-	Bearings, units and housings
PCM 283220 M	28	32	20	Bearings, units and housings
S7024 CE/HCP4A	120	180	28	Bearings, units and housings
S71904 ACE/P4A	20	37	9	Bearings, units and housings
SAF 22611 x 2	50.8	-	-	Bearings, units and housings
Z 205	25	-	5	Seals

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