23B-15-13221 GEAR KOMATSU

The 23B-15-13221 GEAR KOMATSU is a code-specific Komatsu transmission gear listed publicly under both 23B-15-13221 and 23B1513221. Public parts catalogs identify it simply as a gear and place it in the transmission output shaft assembly of Komatsu graders, which gives the part a clear mechanical identity from the very beginning. This is not an exterior drive component, not a wheel-end gear, and not a generic industrial spur gear. It belongs to a defined output-shaft section inside the grader transmission, where torque transfer, gear meshing, and positional accuracy matter directly to machine movement and shift quality.

From the uploaded images, the part has the visual profile of a hardened straight-cut transmission gear with a splined inner bore, a stepped hub, and a substantial tooth face width. The outer teeth are evenly spaced and heavy enough for torque-carrying duty, while the internal splines show that the part is designed to mount positively on a mating shaft rather than spin freely. In practical workshop terms, this is exactly the kind of gear buyers expect to find in an output-shaft cluster where durable engagement, rotational stability, and repeatable alignment are essential. That image-based reading also matches the public catalog placement in transmission output-shaft assemblies.

For a commercial product page, the 23B-15-13221 GEAR KOMATSU should be positioned as a precision drivetrain component for grader transmission service, overhaul work, and exact-code replacement demand. Buyers searching this number are usually not browsing casually. They are typically matching a removed part, checking a transmission schematic, or trying to source the correct replacement while the machine is already in maintenance. That is why a strong page must combine exact part-number visibility, realistic technical explanation, model guidance, and a clear supply message from 3GEN Export as an OEM supplier with worldwide delivery in 5 working days.

Product Overview

The 23B-15-13221 GEAR KOMATSU appears in public market listings with remarkably consistent naming. Multiple parts sources identify the exact code as GEAR, and several application pages place it in transmission output-shaft sections for Komatsu grader models. This consistency is important because industrial buyers often trust repeated catalog language more than broad marketing claims. When several independent parts references describe the same number in the same transmission family, that gives the product page a much stronger technical foundation.

The public assembly context is especially useful. One open application page ties this gear to GD605A-5S in the TRANSMISSION (OUTPUT SHAFT) group. Other open pages show the same part number in GD621A-1, GD623A-1, GD625A-1, GD525A-1, and GD505A-3 output-shaft sections. That pattern strongly indicates that the gear serves in a recurring Komatsu grader transmission design language rather than in an isolated one-model arrangement. For a buyer, that means the part belongs to a known drivetrain family with repeated use across several grader platforms.

A broader public parts reference extends the model association further and links the same number with GD505A, GD511A, GD521A, GD525A, GD605A, GD611A, GD621A, GD621R, GD623A, GD625A, GD661A, and GD663A. That broader fitment picture is exactly the sort of information that helps international buyers narrow down whether they are in the right transmission family before they confirm by serial number. It also makes the page stronger for Google and Search GPT style discovery, because the part is clearly tied to a recognizable set of Komatsu grader applications.

Assembly Context and Function

The 23B-15-13221 GEAR KOMATSU is best understood as an output-shaft transmission gear used to transmit rotational force within the grader power train. Public parts pages do not spell out every engineering detail of its tooth ratio or mating relationship, but they do place it clearly in the output-shaft assembly. That placement alone is very meaningful. Output-shaft gears sit in one of the most mechanically important positions in a transmission system, because they take torque from upstream clutch and shaft arrangements and help deliver the correct motion to the downstream drivetrain path.

The image details support that interpretation well. The outer teeth are broad and straight-cut, the body is thick enough for sustained load, and the inner splines indicate direct shaft engagement. This is not a decorative machined part and not a lightweight synchronizer ring. It is a torque-carrying gear meant to work under steady meshing conditions. In practical service language, that means the part contributes directly to power transfer accuracy, mechanical timing within the transmission geartrain, and the stable operation of the grader under load.

Public neighboring-parts context makes the role even clearer. In open parts-manual snippets and parts-category lists, the gear appears near items such as bearings, spacers, shafts, collars, cages, and worm gear components. That is exactly the environment buyers would expect around an output-shaft gear. A page that describes the 23B-15-13221 GEAR KOMATSU as part of a controlled output-shaft drivetrain arrangement is therefore both commercially useful and well supported by the catalog evidence.

Visible Design of the Part

From the uploaded photos, this gear shows several visual traits that matter to technicians and purchasing teams. The tooth form appears evenly cut and deep enough for reliable engagement. The hub is stepped, which suggests controlled axial seating against a mating surface or spacer arrangement. The bore is internally splined, meaning the part is designed to lock rotationally to a shaft rather than depend on friction alone. These are the kinds of features a workshop compares carefully against a removed part before ordering.

The side profile also matters. The gear is not especially thin, which suggests meaningful tooth contact width and improved load-handling capability. That thickness is important in grader service, where output-shaft components experience repeated torque cycles, shifting loads, and the heavy operational realities of road construction, grading, and earthmoving work. A product page that highlights these visible structural features helps the buyer feel that the listing is grounded in the actual part rather than in generic catalog filler.

Another useful trait is the clean machining around the hub and bore area. Buyers of drivetrain components often want reassurance that the part is not just approximately correct, but actually suited to precision assembly. The gear shown in your images conveys that well. It looks like a dedicated power-train component with controlled machining, not a rough stock item.

Technical Characteristics

The 23B-15-13221 GEAR KOMATSU is publicly identified by the following core details: part number 23B-15-13221, alternate searchable number 23B1513221, part name GEAR, and application group TRANSMISSION (OUTPUT SHAFT). Several open parts pages connect it to grader serial-specific output-shaft assemblies, which is the most useful technical placement a buyer can see when validating a transmission gear.

One currently indexed seller page lists the weight of this part at 6.45 kg gross. Another marketplace-style parts source leaves the weight field blank, so the most careful way to present the number on your page is as a published gross-weight reference rather than an absolute net-weight specification. For commercial use, the practical website wording is that the gear has a published gross weight of approximately 6.45 kg. That gives the buyer a realistic shipping-scale reference while staying accurate about the source of the number.

For technical description, the cleanest phrasing is this: the 23B-15-13221 GEAR KOMATSU is an internally splined output-shaft gear for Komatsu grader transmission assemblies, designed for torque transfer, controlled meshing, and stable fit on the shaft. That wording matches the visible part design and stays closely aligned with the public catalog placement.

Practical specification summary

Part number format: 23B-15-13221
Alternate search format: 23B1513221
Part type: Gear
Application group: Transmission (output shaft)
Published gross weight reference: approximately 6.45 kg
Machine family: Komatsu grader transmission systems.

Compatible Komatsu Models

The 23B-15-13221 GEAR KOMATSU is publicly associated with a broad range of Komatsu grader models. Direct open output-shaft assembly references show the part in GD505A-3, GD525A-1, GD605A-5, GD605A-5S, GD621A-1, GD623A-1, and GD625A-1. Those direct pages are especially useful because they show the number inside actual transmission output-shaft sections rather than in loose marketplace product grids.

Broader public references extend the same part number across the following grader family:

GD505A
GD511A
GD521A
GD525A
GD605A
GD611A
GD621A
GD621R
GD623A
GD625A
GD661A
GD663A.

Because transmission parts can vary by serial break, it is still best practice to confirm model and serial number before shipment. That does not weaken the sales page. It improves trust. Professional buyers know that a correct gear match depends on the full machine context, not only on a partial model name.

Why Accurate Fit Matters

An output-shaft gear is not the kind of part that can be replaced by guesswork. If tooth count, spline form, thickness, or seating geometry differ from the intended part, the transmission may suffer from noise, wear, poor meshing, bearing stress, or repeat disassembly. That is why code-driven replacement behavior is so strong in this category. Buyers do not usually search “grader gear” when they need this part. They search the exact number because the cost of getting it wrong is simply too high.

This is especially important in grader service. A machine waiting on the wrong output-shaft gear is still down, and a transmission reopened because of an incorrect fit costs more in labor than the price difference between correct and incorrect sourcing. A product page that keeps the part identity exact while also explaining the application context gives the buyer much more confidence.

When Buyers Replace This Gear

The 23B-15-13221 GEAR KOMATSU is most likely to be replaced during transmission overhaul, output-shaft service, bearing-related teardown, or repair work after tooth wear, chipping, contact damage, or bore/spline wear has been found. In some cases, the gear may be replaced together with bearings, shaft components, spacers, or related output-shaft parts because the assembly is already open and the buyer wants to restore the system correctly rather than risk another teardown.

This is what gives the part its real commercial importance. It may be only one gear in a larger transmission, but it can determine whether the repair is finished properly or delayed by repeated fitting problems. For fleets and workshops, that matters far more than generic marketing language.

Why Buy from 3GEN Export

The 23B-15-13221 GEAR KOMATSU is the kind of drivetrain spare part that usually becomes urgent only when a grader is already under repair. At 3GEN Export, we supply it as an OEM supplier for buyers who need clear part-number handling, practical export support, and fast turnaround. That matters because transmission jobs do not wait comfortably. Once the machine is opened and the damaged gear is identified, the buyer wants a supplier who understands code-driven sourcing and can move quickly.

3GEN Export delivers worldwide in 5 working days. For workshops, fleet managers, parts resellers, and international construction-equipment buyers, that speed helps reduce downtime and shortens the gap between diagnosis and installation.

Conclusion

The 23B-15-13221 GEAR KOMATSU is a code-specific output-shaft transmission gear publicly identified under both 23B-15-13221 and 23B1513221 and linked to Komatsu grader transmission output-shaft assemblies. Open parts references connect it directly with GD505A-3, GD525A-1, GD605A-5, GD605A-5S, GD621A-1, GD623A-1, and GD625A-1, while broader catalog references extend the model family across GD505A, GD511A, GD521A, GD525A, GD605A, GD611A, GD621A, GD621R, GD623A, GD625A, GD661A, and GD663A. One current seller page lists a gross weight reference of about 6.45 kg.

For your website, the strongest positioning is simple: the 23B-15-13221 GEAR KOMATSU is a precision Komatsu grader transmission gear supplied by 3GEN Export as an OEM supplier with worldwide delivery in 5 working days.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.