OFAS notched disc harrow blade 57672 Ø 560 mm boron steel

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OFAS notched disc harrow blade 57672 Ø 560 mm boron steel

OFAS notched disc harrow blade part number 57672, manufactured from high-strength 30MnB5 boron steel. Outer diameter 560 mm, thickness 5 mm, center hole 130 mm with 4x13 mm bolt hole pattern (Group G18). Matching parts: 55906, 55902, 55903, 57668. Engineered for heavy-duty disc harrows and intensive soil tillage.

30MnB5 Boron steel construction
Aggressive notched profile
Heavy-duty dimensions (Group G18)

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Description

OFAS notched disc blade in Boron steel 30MnB5 - Part number 57672

Notched tillage disc blade manufactured by OFAS, commercial part number 57672. Essential component for disc harrows and soil cultivation equipment, engineered to cut, shred, and incorporate crop residues into the soil while providing superior ground penetration in hard or compacted field conditions. Crafted from premium-grade heat-treated Boron steel (30MnB5), featuring quenched and tempered properties to achieve the ideal balance between high surface hardness, abrasion resistance, and toughness against impact with stones or subterranean obstacles. Measures 560 mm in outer diameter with a 5 mm thickness (Group G18), featuring a 130 mm center bore and a 4-hole mounting pattern with 13 mm hole diameters. First-class OFAS product, fully compatible with matching hubs and mounting hardware part numbers 55906, 55902, 55903, and 57668.

Key features

30MnB5 Boron steel constructionHigh-performance heat-treated alloy steel delivering maximum wear life under abrasive soil conditions and high shock loads.

Aggressive notched profileThe notched edge profile provides superior residue cutting and aggressive clod crushing in tough, unplowed soils.

Heavy-duty dimensions (Group G18)560 mm diameter and 5 mm thickness for excellent structural strength and long operational life.

4x13 mm mounting pattern130 mm center hole with 4x13 mm bolt pattern for precise seating and concentric alignment on the bearing hub.

Matching system componentsDesigned for seamless integration with dedicated hubs, bolts, and supports (matching codes 55906, 55902, 55903, and 57668).

Specifications

Commercial part number	57672
Product type	Notched disc blade / Harrow disc
Manufacturer / Brand	OFAS
Material	30MnB5 Boron steel
Outer diameter	560 mm
Thickness	5 mm
Group	G18
Center bore diameter	130 mm
Mounting hole configuration	4 holes x 13 mm
Primary matched spare parts	55906, 55902, 55903, 57668

Fitting tipsBefore installing the new OFAS 57672 notched disc blade, inspect the bearing hub flange, dust seals, and shaft for wear or play. Thoroughly clean the mounting flange face, removing dirt, rust, and debris. Position the disc over the 130 mm center pilot and align the 4 mounting holes (13 mm). Use high-tensile grade bolts with appropriate washers and locknuts, tightening the fasteners evenly in a cross pattern to the implement manufacturer's specified torque rating. Periodically check bolt tightness after initial field operation.