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IBC

IBC 7306.C IBC 7306.C Angular Contact Ball Bearing

IBC

IBC 7306.C Angular Contact Ball Bearing 30 × 72 × 19 mm

Angular Contact Ball Bearing

RFQ

In stock

EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.

Category: Angular Contact Ball Bearing
Bore: 30 mm
Outer Ø: 72 mm
Width: 19 mm

Overview

IBC 7306.C Angular Contact Ball Bearing supports combined radial and one-direction axial load through a defined contact angle. It is a high-speed, high-precision choice for pumps, compressors, machine tools, and spindle-related positions where axial rigidity and rotational accuracy matter.

The inner and outer ring raceways are offset to create a contact angle. Single-row, double-row, or matched arrangements can be used to meet axial load direction, preload, and rigidity requirements.

Key features

Supports combined radial and one-direction axial load
High-speed and high-accuracy operation
Preload and rigidity adjustable through matched mounting
Suitable for precision rotating assemblies

Typical applications

Machine tool spindles and support shafts
Pumps and compressors
High-speed motors
Precision gearboxes and robot drives

Selection guidance

Select by contact angle, arrangement, preload, precision class, axial load direction, and operating speed.

Symbol	Value	Description
Cr	33800 N	Basic dynamic load rating, radial
C_0r	20500 N	Basic static load rating, radial
C_u	759 N	Fatigue limit load
n_G	17500 1/min	Limiting speed (grease)
n_O	26500 1/min	Limiting speed (oil-air)
≈m	0.348 kg	Weight
α	15 °	Contact angle

Symbol	Value	Description
d	30 mm	Bore diameter
D	72 mm	Outside diameter
B	19 mm	Width
d_pi	48.1 mm	Injection diameter (oil-air lubrication)
a	16 mm	Effective load centre
d₁	45.1 mm	Shoulder diameter, inner ring
D₁	59 mm	Shoulder diameter, outer ring
r_{1,2 min}	1 mm	Minimum chamfer dimension
r_{3,4 min}	0.6 mm	Minimum chamfer dimension, side face

Symbol	Value	Description
d_{a min}	35 mm	Min. shoulder diameter for mounting, inner ring
D_{a max}	67 mm	Max. shoulder diameter for mounting, housing
D_{b max}	65 mm	Max. shoulder diameter, sealed side
r_{a max}	1 mm	Max. fillet radius
r_{b max}	0.6 mm	Max. fillet radius, side face

Symbol	Value	Description
F_{v X}	80 N	Preload force — class X (extra light)
S_{a X}	30 N/μm	Axial stiffness — class X (extra light)
S_{r X}	180 N/μm	Radial stiffness — class X (extra light)
F_{AK X}	230 N	Unloading force — class X (extra light)
F_{v L}	160 N	Preload force — class L (light)
S_{a L}	40 N/μm	Axial stiffness — class L (light)
S_{r L}	230 N/μm	Radial stiffness — class L (light)
F_{AK L}	470 N	Unloading force — class L (light)
F_{v M}	370 N	Preload force — class M (medium)
S_{a M}	55 N/μm	Axial stiffness — class M (medium)
S_{r M}	260 N/μm	Radial stiffness — class M (medium)
F_{AK M}	1050 N	Unloading force — class M (medium)
F_{v H}	740 N	Preload force — class H (high)
S_{a H}	75 N/μm	Axial stiffness — class H (high)
S_{r H}	330 N/μm	Radial stiffness — class H (high)
F_{AK H}	2100 N	Unloading force — class H (high)

Code	Description
100Cr6	Rolling element material
MBA 30	Recommended precision locknut
Single row high precision angular contact ball bearing	Product type

datasheet pdf download

Also searched as

The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:

7306C
7306 C
7306
IBC7306C
IBC 7306 C
IBC7306 C
IBC 7306C
IBC7306

Overview

The inner and outer ring raceways are offset to create a contact angle. Single-row, double-row, or matched arrangements can be used to meet axial load direction, preload, and rigidity requirements.

Symbol

Value

Description

33800 N

Basic dynamic load rating, radial

C_0r

20500 N

Basic static load rating, radial

C_u

759 N

Fatigue limit load

n_G

17500 1/min

Limiting speed (grease)

n_O

26500 1/min

Limiting speed (oil-air)

≈m

0.348 kg

Weight

15 °

Contact angle

Symbol

Value

Description

30 mm

Bore diameter

72 mm

Outside diameter

19 mm

Width

d_pi

48.1 mm

Injection diameter (oil-air lubrication)

16 mm

Effective load centre

d₁

45.1 mm

Shoulder diameter, inner ring

D₁

59 mm

Shoulder diameter, outer ring

r_{1,2 min}

1 mm

Minimum chamfer dimension

r_{3,4 min}

0.6 mm

Minimum chamfer dimension, side face

Symbol

Value

Description

d_{a min}

35 mm

Min. shoulder diameter for mounting, inner ring

D_{a max}

67 mm

Max. shoulder diameter for mounting, housing

D_{b max}

65 mm

Max. shoulder diameter, sealed side

r_{a max}

1 mm

Max. fillet radius

r_{b max}

0.6 mm

Max. fillet radius, side face

Symbol

Value

Description

F_{v X}

80 N

Preload force — class X (extra light)

S_{a X}

30 N/μm

Axial stiffness — class X (extra light)

S_{r X}

180 N/μm

Radial stiffness — class X (extra light)

F_{AK X}

230 N

Unloading force — class X (extra light)

F_{v L}

160 N

Preload force — class L (light)

S_{a L}

40 N/μm

Axial stiffness — class L (light)

S_{r L}

230 N/μm

Radial stiffness — class L (light)

F_{AK L}

470 N

Unloading force — class L (light)

F_{v M}

370 N

Preload force — class M (medium)

S_{a M}

55 N/μm

Axial stiffness — class M (medium)

S_{r M}

260 N/μm

Radial stiffness — class M (medium)

F_{AK M}

1050 N

Unloading force — class M (medium)

F_{v H}

740 N

Preload force — class H (high)

S_{a H}

75 N/μm

Axial stiffness — class H (high)

S_{r H}

330 N/μm

Radial stiffness — class H (high)

F_{AK H}

2100 N

Unloading force — class H (high)

Code

Description

100Cr6

Rolling element material

MBA 30

Recommended precision locknut

Single row high precision angular contact ball bearing

Product type

IBC 7306.C Angular Contact Ball Bearing 30 × 72 × 19 mm