Notched disc harrow blade 57486 diameter 610 mm square 33 OEM 11134139

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Notched disc harrow blade 57486 diameter 610 mm square 33 OEM 11134139

Notched disc harrow blade part number 57486 engineered for heavy duty tillage equipment, matching original OEM reference Nardi 11134139. Manufactured from premium 30 MnB 5 boron steel, it features a 610 mm diameter, 33 mm square center hole, heavy duty 6 mm plate thickness, and 73 mm concavity, delivering superior crop residue cutting and durability.

Fits

NardiNardi disc harrows

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Description

Notched harrow disc blade for Nardi 610 mm square bore 33 mm - Part number 57486

Replacement notched disc harrow blade for agricultural disc harrows and heavy tillage equipment, commercial part number 57486. Engineered for primary soil fracturing, aggressive clod crushing, and thorough slicing of heavy crop residues, it delivers exceptional ground penetration even in heavy, compacted conditions. Compatible with Nardi implements as a direct replacement for OEM reference 11134139. Manufactured from high-tensile 30 MnB5 boron steel, it ensures superior resistance to abrasive wear along with structural elasticity to withstand sudden stone impacts. It features an overall diameter of 610 mm, a 73 mm dish concavity, an extra-thick 6 mm heavy-duty plate, and a 33 mm center square bore for heavy-duty gang axle mounting.

Key features

30 MnB5 boron steelHeat-treated alloy steel formulation engineered to maximize surface hardness against abrasion while resisting severe shock loads.

Notched cutting edgeScalloped perimeter designed to maintain continuous gang rotation, slice dense root systems, and tackle hard untilled ground.

Calibrated 73 mm dish concavityCurvature profile optimized for effective soil turnover, clod fracturing, and residue burial into the seedbed.

Extra-heavy 6 mm thicknessRobust disc plate engineered to withstand extreme torsional stress and prolonged wear in harsh, rocky soils.

33 mm square center holeHeavy-duty central opening ensuring a secure, non-slip lock onto matching large-section harrow gang axles.

Nardi OEM fitDirect interchangeability with original equipment reference 11134139 for dependable equipment servicing.

Compatibility

Nardi disc harrows

Nardi (OEM ref. 11134139)

Specifications

Commercial part number	57486
OEM reference	11134139
Machine manufacturer	Nardi
Product type	Notched disc harrow blade
Material	Boron steel 30 MnB5
Diameter	610 mm
Center bore	Square 33 mm
Thickness	6 mm
Concavity	73 mm

Fitting tipsBefore installing the disc onto the square gang axle, clean off all dirt buildup, rust, and surface burrs from the shaft and mating spool spacers. Slide the notched blade into position ensuring the 73 mm dish concavity and cutting notches face the required operating angle of the gang assembly. Ensure that the 33 mm square bore seats flush onto the shaft without excessive bind to eliminate localized stress points. Torque the axle gang nut to the equipment manufacturer's specified rating and check the complete disc pack for proper tightness after the initial operational hours in the field.