IBC MBA80 Lock Nut 80 × 105 × 24 mm

Lock Nut

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

Category: Lock Nut
Bore: 80 mm
Outer Ø: 105 mm
Width: 24 mm

Overview

IBC MBA80 Lock Nut (Bearing Locknut) is a precision threaded fastener that secures a bearing axially on a shaft or sleeve. Typical KM and AN series nuts clamp the inner ring, are used with adapter and withdrawal sleeves, and combine with a tab (lock) washer to prevent loosening.

The steel nut has a precision metric (or inch) thread and axial slots; the tab of a lock washer is bent into a slot to lock rotation. KM types pair with MB washers, while AN types use a self-locking feature or a separate locking part.

Key features

Positive axial clamping of bearings on shafts and sleeves
Secured against loosening by an MB tab washer
Used to mount adapter and withdrawal sleeves
Precision thread maintains accurate position and preload

Typical applications

Self-aligning bearings on adapter sleeves
Bearing retention on shafts and spindles
Pump, gearbox, and motor assemblies
Shaft-end clamping in general rotating machinery

Selection guidance

Check nut designation (e.g., KM 0, AN 08), thread pitch, shaft/thread diameter, matching washer (MB) size, and sleeve type.

Symbol	Value	Description
F_a	390 kN	Permissible axial load

Symbol	Value	Description
d	80 mm	Bore diameter
D	105 mm	Outside diameter
B	24 mm	Width
g	8 mm	Dimension g
t	3.5 mm	Thickness t
d₁	95 mm	Diameter d1
H₁	6.7 mm	Height H1
H₂	2 mm	Height H2
E	105 mm	Dimension E

Symbol	Value	Description
M_A	9 Nm	Max. tightening torque of lock screws

Code	Description
M 80 x 2	Thread designation
M 8	Lock screw thread

datasheet pdf download

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