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IBC

IBC IBC 71840.C Angular Contact Ball Bearing

IBC

IBC 71840.C Angular Contact Ball Bearing 200 × 250 × 24 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: 200 mm
Outer Ø: 250 mm
Width: 24 mm

Overview

IBC 71840.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	81000 N	Basic dynamic load rating, radial
C_0r	113500 N	Basic static load rating, radial
C_u	4204 N	Fatigue limit load
n_G	4400 1/min	Limiting speed (grease)
n_O	6500 1/min	Limiting speed (oil-air)
≈m	2.33 kg	Weight
α	15 °	Contact angle

Symbol	Value	Description
d	200 mm	Bore diameter
D	250 mm	Outside diameter
B	24 mm	Width
d_pi	222 mm	Injection diameter (oil-air lubrication)
a	42 mm	Effective load centre
d₁	218 mm	Shoulder diameter, inner ring
D₁	232.5 mm	Shoulder diameter, outer ring
r_{1,2 min}	1.5 mm	Minimum chamfer dimension
r_{3,4 min}	0.6 mm	Minimum chamfer dimension, side face

Symbol	Value	Description
d_{a min}	212 mm	Min. shoulder diameter for mounting, inner ring
D_{a max}	235 mm	Max. shoulder diameter for mounting, housing
D_{b max}	237 mm	Max. shoulder diameter, sealed side
r_{a max}	1.5 mm	Max. fillet radius
r_{b max}	0.6 mm	Max. fillet radius, side face

Symbol	Value	Description
F_{v X}	190 N	Preload force — class X (extra light)
S_{a X}	120 N/μm	Axial stiffness — class X (extra light)
S_{r X}	810 N/μm	Radial stiffness — class X (extra light)
F_{AK X}	540 N	Unloading force — class X (extra light)
F_{v L}	380 N	Preload force — class L (light)
S_{a L}	160 N/μm	Axial stiffness — class L (light)
S_{r L}	960 N/μm	Radial stiffness — class L (light)
F_{AK L}	1090 N	Unloading force — class L (light)
F_{v M}	860 N	Preload force — class M (medium)
S_{a M}	230 N/μm	Axial stiffness — class M (medium)
S_{r M}	1150 N/μm	Radial stiffness — class M (medium)
F_{AK M}	2450 N	Unloading force — class M (medium)
F_{v H}	1730 N	Preload force — class H (high)
S_{a H}	330 N/μm	Axial stiffness — class H (high)
S_{r H}	1470 N/μm	Radial stiffness — class H (high)
F_{AK H}	4890 N	Unloading force — class H (high)

Code	Description
100Cr6	Rolling element material
MBA 200	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:

71840C
71840 C
71840
IBC71840C
IBC 71840 C
IBC71840 C
IBC 71840C
IBC71840

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

81000 N

Basic dynamic load rating, radial

C_0r

113500 N

Basic static load rating, radial

C_u

4204 N

Fatigue limit load

n_G

4400 1/min

Limiting speed (grease)

n_O

6500 1/min

Limiting speed (oil-air)

≈m

2.33 kg

Weight

15 °

Contact angle

Symbol

Value

Description

200 mm

Bore diameter

250 mm

Outside diameter

24 mm

Width

d_pi

222 mm

Injection diameter (oil-air lubrication)

42 mm

Effective load centre

d₁

218 mm

Shoulder diameter, inner ring

D₁

232.5 mm

Shoulder diameter, outer ring

r_{1,2 min}

1.5 mm

Minimum chamfer dimension

r_{3,4 min}

0.6 mm

Minimum chamfer dimension, side face

Symbol

Value

Description

d_{a min}

212 mm

Min. shoulder diameter for mounting, inner ring

D_{a max}

235 mm

Max. shoulder diameter for mounting, housing

D_{b max}

237 mm

Max. shoulder diameter, sealed side

r_{a max}

1.5 mm

Max. fillet radius

r_{b max}

0.6 mm

Max. fillet radius, side face

Symbol

Value

Description

F_{v X}

190 N

Preload force — class X (extra light)

S_{a X}

120 N/μm

Axial stiffness — class X (extra light)

S_{r X}

810 N/μm

Radial stiffness — class X (extra light)

F_{AK X}

540 N

Unloading force — class X (extra light)

F_{v L}

380 N

Preload force — class L (light)

S_{a L}

160 N/μm

Axial stiffness — class L (light)

S_{r L}

960 N/μm

Radial stiffness — class L (light)

F_{AK L}

1090 N

Unloading force — class L (light)

F_{v M}

860 N

Preload force — class M (medium)

S_{a M}

230 N/μm

Axial stiffness — class M (medium)

S_{r M}

1150 N/μm

Radial stiffness — class M (medium)

F_{AK M}

2450 N

Unloading force — class M (medium)

F_{v H}

1730 N

Preload force — class H (high)

S_{a H}

330 N/μm

Axial stiffness — class H (high)

S_{r H}

1470 N/μm

Radial stiffness — class H (high)

F_{AK H}

4890 N

Unloading force — class H (high)

Code

Description

100Cr6

Rolling element material

MBA 200

Recommended precision locknut

Single row high precision angular contact ball bearing

Product type

IBC 71840.C Angular Contact Ball Bearing 200 × 250 × 24 mm