Which Excavator Tooth Pin Fits CAT, Komatsu, or Hitachi Machines?

If you’ve ever ordered an excavator tooth pin only to find it doesn’t fit, you know the frustration. Tooth pins may look similar, but in reality, each brand—and often each specific model—can require a different size, shape, or locking mechanism.

So how do you know which excavator tooth pin is the right one for CAT, Komatsu, or Hitachi machines? Let’s break it down.

1. Why the Right Tooth Pin Matters

The tooth pin’s main job is simple—secure the bucket tooth to the adapter—but when the pin isn’t an exact fit, it can cause:

• Loose bucket teeth that fall off mid-job

• Faster wear on the adapter

• Risk of damaging your bucket or machine arm

• Increased downtime for repairs

Basically, using the wrong pin is like wearing the wrong size shoe—you might still move, but it won’t be comfortable or efficient.

2. Excavator Tooth Pins for CAT Machines

CAT (Caterpillar) machines are known for their durability, but they have strict part compatibility standards. Common CAT tooth pin series include J200, J225, J250, J300, J350, J400, and J460.

• Example: A CAT 320 excavator might use a J350 tooth system, which requires a specific pin size and retainer type.

• Most CAT pins use a side pin & retainer lock system.

💡 Pro tip: Always check your current pin’s part number before ordering. Even machines in the same series can have variations.

3. Excavator Tooth Pins for Komatsu Machines

Komatsu excavators, popular in construction and mining, often use the K series tooth system. These pins are typically top-mounted with a spring pin lock.

• Common sizes: K100, K110, K115, K130, K145

• Many Komatsu tooth pins have unique head shapes for easier installation and removal.

If you work in rocky environments, it’s worth choosing heat-treated alloy steel pins for extra toughness—yep, that’s exactly what we produce at Nan’an Jinxin Machinery.

4. Excavator Tooth Pins for Hitachi Machines

Hitachi machines often run with the H series tooth system or their OEM-specific locking designs.

• Popular sizes: H40, H45, H50, H55

• Many Hitachi pins have a grooved shaft to lock into place more securely.

• Always check the adapter code—some tooth pins are compatible across different Hitachi models, but others are model-specific.

5. How to Choose the Right Tooth Pin Every Time

Here’s a quick checklist to avoid costly mistakes:

1. Check the brand & model of your excavator.

2. Read the part number on your existing pin (if visible).

3. Match the locking system type (side pin, top pin, retainer, spring lock).

4. Measure the pin diameter & length if the number isn’t available.

5. Work with a trusted supplier that offers model-matching support.

And let’s be real—sometimes you just want to skip the headache and send a photo to your supplier. A good manufacturer can identify the correct pin for you in minutes.

6. Why Source from a China Manufacturer?

Buying directly from a China excavator parts supplier like Nan’an Jinxin Machinery offers:

• OEM compatibility with CAT, Komatsu, Hitachi, Volvo, Hyundai, and more

• Lower costs compared to original dealers

• Bulk order discounts for distributors

• Custom production for special models

Our pins are made from high-strength alloy steel, go through precision CNC machining, and receive anti-rust treatment to extend service life.

Getting the right excavator tooth pin for CAT, Komatsu, or Hitachi machines isn’t rocket science—but it does require attention to detail. The wrong pin can lead to downtime, safety risks, and higher operating costs.

With the right supplier, you’ll get a perfect fit every time. And yeah, if you’re tired of guessing, just reach out—we’ll match your pin faster than you can say “Where’s my wrench?”