IBC BSB80M140 Angular Contact Ball Bearing Axial Angular Contact Ball Bearing 80 × 140 × 26 mm

Ball Screw Support Bearings

Axial Angular Contact Ball Bearing

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

Category: Axial Angular Contact Ball Bearing
Bore: 80 mm
Outer Ø: 140 mm
Width: 26 mm

Overview

IBC BSB80M140 Axial Angular Contact Ball Bearing is a precision bearing for screw drives and spindle support positions requiring accurate axial location and high rigidity. It provides low friction and repeatable positioning in ball screws, lead screws, and machine tool feed axes.

The design uses balls with a large contact angle, precision raceways, and controlled preload. Flanged or cylindrical outer-ring styles such as ZKLF and ZKLN can be selected according to the mounting interface.

Key features

High axial rigidity and positioning accuracy
Low friction for precision feed motion
Preload reduces backlash
Optimized for ball screw support

Typical applications

Ball screw support bearings
Machine tool feed axes
Precision linear actuators
Semiconductor and automation equipment

Selection guidance

Select by screw shaft diameter, preload, precision class, flange requirement, speed, and target positioning accuracy.

Symbol	Value	Description
C_a	123600 N	Basic dynamic load rating, axial
C_0a	181600 N	Basic static load rating, axial
C_u	6730 N	Fatigue limit load
≈m	1.72 kg	Weight
α	40 °	Contact angle

Symbol	Value	Description
d	80 mm	Bore diameter
D	140 mm	Outside diameter
B	26 mm	Width
a	108 mm	Effective load centre
r_{1,2 min}	2 mm	Minimum chamfer dimension
r_{3,4 min}	0.6 mm	Minimum chamfer dimension, side face
d₁	109.5 mm	Shoulder diameter, inner ring
D₁	112 mm	Shoulder diameter, outer ring

Symbol	Value	Description
d_{a min}	85 mm	Min. shoulder diameter for mounting, inner ring
D_{b max}	124 mm	Max. shoulder diameter, sealed side

Symbol	Value	Description
F_{v L}	3630 N	Preload force — class L (light)
F_{v M}	8170 N	Preload force — class M (medium)
F_{v H}	16340 N	Preload force — class H (high)
S_{ax L}	770 N/μm	Axial stiffness — preload L
S_{ax M}	1030 N/μm	Axial stiffness — preload M
S_{ax H}	1330 N/μm	Axial stiffness — preload H
n_{F L}	3400 1/min	Limiting speed (grease) — preload L
n_{F M}	2700 1/min	Limiting speed (grease) — preload M
n_{F H}	1400 1/min	Limiting speed (grease) — preload H
M_{R L}	0.35 Nm	Frictional torque — preload L
M_{R M}	0.56 Nm	Frictional torque — preload M
M_{R H}	1.12 Nm	Frictional torque — preload H

Code	Description
Single row 40° ball screw support bearings (BSB)	Product type

datasheet pdf download

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