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INA / Precision locknut

INA ZMA50/75

Precision locknut technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Outside diameterD
75 mm
WidthB
25 mm
Mass≈m
0.462 kg
Outside Diamater (D)
75 mm
Total Height (H)
25 mm
Mounting Torque Set Screw (Ma)
15 Nm

Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications3 parameters
Core specifications
ParameterSymbolValue
Outside diameterD75 mm
WidthB25 mm
Mass≈m0.462 kg
Manufacturer Identity5 parameters
Manufacturer Identity
ParameterSymbolValue
Schaeffler Product Code409029
BrandINA
Base TypeZMA50/75
Old Designation["ZMA 50/75"]
X Life Markingn.r.
Product Identity2 parameters
Product Identity
ParameterSymbolValue
ConstructionPrecision locknuts ZMA, locking pegs, radially arranged, heavy series
Short DescriptionPrecision locknut
Technical Data11 parameters
Technical Data
ParameterSymbolValue
Outside Diamater (D)75 mm
Total Height (H)25 mm
Mounting Torque Set Screw (Ma)15 Nm
Plant Diameter Outside (D1)68 mm
Distance Bore (C)12.5 mm
Width Retaining Slot (B)6 mm
Breakawag (Ml)130 Nm
Hight Retaining Slot (T)2.5 mm
Mounting Torque Reference (Mal)85 Nm
Breaking Load, Axial (Fab)415,000 N
Mass Moment Of Inertia (Mm)4.89 kg*cm2

Technical documents & data sheet

This product page is a BearingScope catalogue reference, not a manufacturer-certified drawing. Preserve the full brand and designation when comparing files.

Record identity
INA ZMA50/75
Document matching
Exact designation, assembly scope, revision and units must agree.

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