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Plain disc harrow blade 55425 diameter 510 mm square hole 31 mm

Plain disc harrow blade part number 55425 designed for agricultural tillage equipment and disc harrows. Manufactured from high strength 30 MnB 5 boron steel, it features a 510 mm outer diameter, 31 mm square center hole, 3.5 mm thickness, and 61 mm concavity, delivering consistent soil leveling and long-lasting field durability.

30 MnB5 boron steel
Smooth plain edge
Calibrated 61 mm dish concavity

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Description

Plain harrow disc blade 510 mm square bore 31 mm - Part number 55425

Plain disc harrow blade for agricultural disc harrows and soil cultivators, commercial part number 55425. Designed for shallow cultivation, soil leveling, and crop residue sizing, it provides a smooth, continuous cut across varied field conditions. Manufactured from high-tensile 30 MnB5 boron steel, it ensures exceptional wear resistance alongside structural elasticity to withstand sudden stone impacts. It features an overall diameter of 510 mm, a 61 mm dish concavity, a 3.5 mm plate thickness, and a 31 mm central square bore for direct gang axle mounting.

Key features

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

Smooth plain edgeContinuous cutting profile ensuring even soil slicing, consistent crumbling, and uniform seedbed leveling.

Calibrated 61 mm dish concavityCurvature profile optimized for effective soil turnover and reliable burial of organic residues.

31 mm square center holeSized for heavy-duty harrow axles to ensure a secure, non-slip lock under high tractive effort.

Specifications

Commercial part number	55425
Product type	Plain disc harrow blade
Material	Boron steel 30 MnB5
Diameter	510 mm
Center bore	Square 31 mm
Thickness	3.5 mm
Concavity	61 mm

Fitting tipsBefore installing the disc onto the square gang axle, remove all dirt buildup, rust, and burrs from the shaft and mating spool spacers. Slide the blade into position ensuring the 61 mm dish concavity matches the required operating angle of the gang assembly. Ensure that the 31 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.