HB500 Half Arrow Profiles for Buckets and Attachments

Half arrow profiles on buckets and attachments

Half arrow profiles are welded to edges and transition zones that require additional wear protection. Depending on the installation position, they form the working edge, protect an existing base edge or take the direct wear on exposed areas of a toothed bucket.

The LIS® range in this category consists of weld-on HB500 profile bars. Machine-specific cast segments and bolt-on half arrow edges are separate components and are not included in this category.

Use on working edges and base edges

At the front of the bucket, the profile can form the working edge or be welded to an existing base edge as additional edge protection. On toothed buckets, sections cut to the required length protect the exposed areas between tooth adapters.

Side edges and locally worn transition areas are other possible installation positions. Profile geometry, mating surface and installation orientation must match the existing structure. The nominal size alone is not sufficient for technical selection.

Check profile size and cross-section

The current LIS® range includes HB500 half arrow profiles in the following sizes:

• 101×11 mm
• 151×16 mm
• 203×19 mm
• 254×40 mm

All four profile sizes are currently available in 3 m and 6 m lengths. Designations such as 101×11 mm or 203×19 mm do not describe every dimension of the profile cross-section. For a like-for-like replacement, the complete cross-sectional geometry, mating surface, adjacent wear parts and installation orientation must be checked. A larger cross-section is not automatically suitable for every bucket or attachment design.

Difference from cutting edge steel and surface wear protection

Cutting edge steel and weld-on edges are used to build or replace welded cutting edges with a different profile cross-section. Depending on the installation, half arrow profiles can also protect areas between tooth adapters, side edges or local transition zones. They must not be replaced with cutting edge steel or a standard weld-on edge without technical verification.

Wear strips and flat steel are used mainly on flat contact surfaces, undersides and transition areas. Studded wear plate / armored bars form a separate product group for local wear zones. Selection is based on the wear location, connection geometry and required protective function.

Base structure and welding procedure

Before welding, check the material grade and condition of the base structure, the complete profile geometry, the mating surface and the installation orientation. Cracks, severe washout and an insufficient remaining cross-section must be assessed before installation and included in the repair plan.

HB500 is not a welding procedure. Preheating, filler material, heat input, weld build-up and cooling must be derived from the material data and the applicable welding procedure specification. The work must be carried out by appropriately qualified personnel.

After cooling, the weld area and base structure must at least be visually inspected for cracks, detachment and unacceptable distortion. Additional inspections depend on the component design, welding procedure and operating requirements. During service, inspect the profile, welds and adjacent base structure together.

Related cutting edges and wear profiles

Replaceable cutting edges with 6-inch hole spacing are available under 6 Inch Bolt-On Cutting Edges. Additional cutting edge steel, profiles and wear components are listed in the parent category Edges and Blades.