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IBC

IBC 71960.C IBC 71960.C Angular Contact Ball Bearing

IBC

IBC 71960.C Angular Contact Ball Bearing 300 × 420 × 56 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: 300 mm
Outer Ø: 420 mm
Width: 56 mm

Overview

IBC 71960.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	361000 N	Basic dynamic load rating, radial
C_0r	572000 N	Basic static load rating, radial
C_u	21185 N	Fatigue limit load
n_G	2500 1/min	Limiting speed (grease)
n_O	3900 1/min	Limiting speed (oil-air)
≈m	20.5 kg	Weight
α	15 °	Contact angle

Symbol	Value	Description
d	300 mm	Bore diameter
D	420 mm	Outside diameter
B	56 mm	Width
d_pi	321.9 mm	Injection diameter (oil-air lubrication)
a	83 mm	Effective load centre
d₁	315 mm	Shoulder diameter, inner ring
D₁	407.4 mm	Shoulder diameter, outer ring
r_{1,2 min}	3 mm	Minimum chamfer dimension
r_{3,4 min}	1.1 mm	Minimum chamfer dimension, side face

Symbol	Value	Description
d_{a min}	327 mm	Min. shoulder diameter for mounting, inner ring
D_{a max}	399 mm	Max. shoulder diameter for mounting, housing
D_{b max}	403 mm	Max. shoulder diameter, sealed side
r_{a max}	3 mm	Max. fillet radius
r_{b max}	1.1 mm	Max. fillet radius, side face

Symbol	Value	Description
F_{v X}	1085 N	Preload force — class X (extra light)
S_{a X}	200 N/μm	Axial stiffness — class X (extra light)
S_{r X}	1330 N/μm	Radial stiffness — class X (extra light)
F_{AK X}	3070 N	Unloading force — class X (extra light)
F_{v L}	2170 N	Preload force — class L (light)
S_{a L}	270 N/μm	Axial stiffness — class L (light)
S_{r L}	1630 N/μm	Radial stiffness — class L (light)
F_{AK L}	6140 N	Unloading force — class L (light)
F_{v M}	4890 N	Preload force — class M (medium)
S_{a M}	400 N/μm	Axial stiffness — class M (medium)
S_{r M}	1980 N/μm	Radial stiffness — class M (medium)
F_{AK M}	13840 N	Unloading force — class M (medium)
F_{v H}	9770 N	Preload force — class H (high)
S_{a H}	570 N/μm	Axial stiffness — class H (high)
S_{r H}	2580 N/μm	Radial stiffness — class H (high)
F_{AK H}	27650 N	Unloading force — class H (high)

Code	Description
100Cr6	Rolling element material
MBA 300	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:

71960C
71960 C
71960
IBC71960C
IBC 71960 C
IBC71960 C
IBC 71960C
IBC71960

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

361000 N

Basic dynamic load rating, radial

C_0r

572000 N

Basic static load rating, radial

C_u

21185 N

Fatigue limit load

n_G

2500 1/min

Limiting speed (grease)

n_O

3900 1/min

Limiting speed (oil-air)

≈m

20.5 kg

Weight

15 °

Contact angle

Symbol

Value

Description

300 mm

Bore diameter

420 mm

Outside diameter

56 mm

Width

d_pi

321.9 mm

Injection diameter (oil-air lubrication)

83 mm

Effective load centre

d₁

315 mm

Shoulder diameter, inner ring

D₁

407.4 mm

Shoulder diameter, outer ring

r_{1,2 min}

3 mm

Minimum chamfer dimension

r_{3,4 min}

1.1 mm

Minimum chamfer dimension, side face

Symbol

Value

Description

d_{a min}

327 mm

Min. shoulder diameter for mounting, inner ring

D_{a max}

399 mm

Max. shoulder diameter for mounting, housing

D_{b max}

403 mm

Max. shoulder diameter, sealed side

r_{a max}

3 mm

Max. fillet radius

r_{b max}

1.1 mm

Max. fillet radius, side face

Symbol

Value

Description

F_{v X}

1085 N

Preload force — class X (extra light)

S_{a X}

200 N/μm

Axial stiffness — class X (extra light)

S_{r X}

1330 N/μm

Radial stiffness — class X (extra light)

F_{AK X}

3070 N

Unloading force — class X (extra light)

F_{v L}

2170 N

Preload force — class L (light)

S_{a L}

270 N/μm

Axial stiffness — class L (light)

S_{r L}

1630 N/μm

Radial stiffness — class L (light)

F_{AK L}

6140 N

Unloading force — class L (light)

F_{v M}

4890 N

Preload force — class M (medium)

S_{a M}

400 N/μm

Axial stiffness — class M (medium)

S_{r M}

1980 N/μm

Radial stiffness — class M (medium)

F_{AK M}

13840 N

Unloading force — class M (medium)

F_{v H}

9770 N

Preload force — class H (high)

S_{a H}

570 N/μm

Axial stiffness — class H (high)

S_{r H}

2580 N/μm

Radial stiffness — class H (high)

F_{AK H}

27650 N

Unloading force — class H (high)

Code

Description

100Cr6

Rolling element material

MBA 300

Recommended precision locknut

Single row high precision angular contact ball bearing

Product type

IBC 71960.C Angular Contact Ball Bearing 300 × 420 × 56 mm