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IBC

IBC HM71908.C IBC HM71908.C Angular Contact Ball Bearing

IBC

IBC HM71908.C Angular Contact Ball Bearing 40 × 62 × 12 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: 40 mm
Outer Ø: 62 mm
Width: 12 mm

Overview

IBC HM71908.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	10000 N	Basic dynamic load rating, radial
C_0r	7300 N	Basic static load rating, radial
C_u	270 N	Fatigue limit load
n_G	30200 1/min	Limiting speed (grease)
n_O	45900 1/min	Limiting speed (oil-air)
≈m	0.12 kg	Weight
α	18 °	Contact angle

Symbol	Value	Description
d	40 mm	Bore diameter
D	62 mm	Outside diameter
B	12 mm	Width
a	14 mm	Effective load centre
d₁	47.8 mm	Shoulder diameter, inner ring
D₁	54.2 mm	Shoulder diameter, outer ring
r_{1,2 min}	0.6 mm	Minimum chamfer dimension
r_{3,4 min}	0.3 mm	Minimum chamfer dimension, side face

Symbol	Value	Description
d_{a min}	45 mm	Min. shoulder diameter for mounting, inner ring
D_{a max}	57 mm	Max. shoulder diameter for mounting, housing
D_{b max}	59.3 mm	Max. shoulder diameter, sealed side
r_{a max}	0.6 mm	Max. fillet radius
r_{b max}	0.3 mm	Max. fillet radius, side face

Symbol	Value	Description
F_{v L}	35 N	Preload force — class L (light)
S_{a L}	25 N/μm	Axial stiffness — class L (light)
S_{r L}	160 N/μm	Radial stiffness — class L (light)
F_{AK L}	100 N	Unloading force — class L (light)
F_{v M}	110 N	Preload force — class M (medium)
S_{a M}	40 N/μm	Axial stiffness — class M (medium)
S_{r M}	210 N/μm	Radial stiffness — class M (medium)
F_{AK M}	320 N	Unloading force — class M (medium)
F_{v H}	220 N	Preload force — class H (high)
S_{a H}	55 N/μm	Axial stiffness — class H (high)
S_{r H}	250 N/μm	Radial stiffness — class H (high)
F_{AK H}	640 N	Unloading force — class H (high)

Code	Description
100Cr6	Rolling element material
100Cr6	Ring material
P4A	Tolerance class
MBA 40	Recommended precision locknut
High-precision angular contact ball bearing, speed-optimized HM series	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:

HM71908C
HM71908 C
HM71908
IBCHM71908C
IBC HM 71908 C
IBCHM 71908 C
IBCHM71908 C
IBC HM71908C
IBC HM 71908C
IBCHM71908

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

10000 N

Basic dynamic load rating, radial

C_0r

7300 N

Basic static load rating, radial

C_u

270 N

Fatigue limit load

n_G

30200 1/min

Limiting speed (grease)

n_O

45900 1/min

Limiting speed (oil-air)

≈m

0.12 kg

Weight

18 °

Contact angle

Symbol

Value

Description

40 mm

Bore diameter

62 mm

Outside diameter

12 mm

Width

14 mm

Effective load centre

d₁

47.8 mm

Shoulder diameter, inner ring

D₁

54.2 mm

Shoulder diameter, outer ring

r_{1,2 min}

0.6 mm

Minimum chamfer dimension

r_{3,4 min}

0.3 mm

Minimum chamfer dimension, side face

Symbol

Value

Description

d_{a min}

45 mm

Min. shoulder diameter for mounting, inner ring

D_{a max}

57 mm

Max. shoulder diameter for mounting, housing

D_{b max}

59.3 mm

Max. shoulder diameter, sealed side

r_{a max}

0.6 mm

Max. fillet radius

r_{b max}

0.3 mm

Max. fillet radius, side face

Symbol

Value

Description

F_{v L}

35 N

Preload force — class L (light)

S_{a L}

25 N/μm

Axial stiffness — class L (light)

S_{r L}

160 N/μm

Radial stiffness — class L (light)

F_{AK L}

100 N

Unloading force — class L (light)

F_{v M}

110 N

Preload force — class M (medium)

S_{a M}

40 N/μm

Axial stiffness — class M (medium)

S_{r M}

210 N/μm

Radial stiffness — class M (medium)

F_{AK M}

320 N

Unloading force — class M (medium)

F_{v H}

220 N

Preload force — class H (high)

S_{a H}

55 N/μm

Axial stiffness — class H (high)

S_{r H}

250 N/μm

Radial stiffness — class H (high)

F_{AK H}

640 N

Unloading force — class H (high)

Code

Description

100Cr6

Rolling element material

100Cr6

Ring material

P4A

Tolerance class

MBA 40

Recommended precision locknut

High-precision angular contact ball bearing, speed-optimized HM series

Product type

IBC HM71908.C Angular Contact Ball Bearing 40 × 62 × 12 mm