421-838-1120 Bolt-On Side Cutting Edge Segment for Komatsu Wheel Loaders

The 421-838-1120 side cutting edge is an aftermarket bolt-on wear component for selected Komatsu WA-series wheel loader buckets. Parts catalogues identify it as a short side edge used within segment-type or bolt-on bucket cutting-edge arrangements.

Its compact two-hole design allows the worn outer cutting-edge section to be replaced without welding, helping protect the bucket base edge and maintain an effective material-entry profile.

Market specifications commonly show a nominal size of approximately 180 × 330 mm, while both 30 mm and 32 mm thickness versions are listed by different manufacturers. For this reason, compatibility should be confirmed using the machine model, serial number, bucket arrangement, original part number and actual dimensions.

Material grade, heat treatment and hardness can be supplied according to the agreed wear requirement. Buyers should request dimensional inspection and material documentation when consistent batch specifications are required.

Komatsu names and reference numbers are used solely for product identification. This product is an aftermarket replacement part and is not represented as a genuine Komatsu component.

Features

• Reference replacement for part number 421-838-1120

• Bolt-on side cutting edge or outer edge segment

• Two-hole flat mounting design

• Designed for compatible wheel loader bucket cutting-edge systems

• Replaceable without welding when the correct mounting arrangement is present

• Wear-resistant steel options available according to order requirements

• Suitable for distributors, equipment repair companies, mines and contractors

• Dimensional confirmation supported by sample, drawing or machine information

Application

This side cutting edge may be used on selected configurations within the following Komatsu wheel loader families:

• WA350

• WA380

• WA400

• WA420

• WA430

• WA450

• WA470

• WA480

Compatibility is not determined by model family alone. Different serial-number ranges, regional versions, standard buckets, segment-edge buckets and both-side-dump buckets may use different cutting-edge arrangements.

For accurate identification, provide:

• Machine model

• Machine serial number

• Bucket type

• Reference part number

• Existing part photographs

• Length, width and thickness

• Hole diameter and center spacing

• Required quantity

FAQ