Are you searching for a disc chipper knife disc but only have the machine model or an old component to identify it?

Ordering a replacement knife disc requires more than checking its outside diameter. The disc is part of a rotating cutting assembly, and its dimensions, mounting arrangement and operating parameters must match the original machine design.

Here are six important points to check before purchasing.

1. Knife Disc Diameter

The knife disc diameter is one of the first specifications to confirm.

In the reference model range, disc diameters include:

• 950 mm

• 1,220 mm

• 1,600 mm

• 1,800 mm

• 2,000 mm

• 2,330 mm

• 3,360 mm

These dimensions belong to different machine models. A disc with a similar diameter is not necessarily interchangeable with the original one.

Also confirm the disc thickness, center bore, mounting holes and connection dimensions.

2. Operating Speed

The reference models operate at different knife disc speeds, ranging from 249 rpm to 980 rpm.

Does a higher speed always mean better cutting performance? Not necessarily.

The rotational speed is designed together with the disc diameter, drive system, knife configuration and machine structure. Changing the speed without checking the complete design may create mechanical or operational problems.

Always confirm the original operating speed before ordering a replacement disc.

3. Number and Arrangement of Knives

The reference series includes configurations with 6, 8 or 16 knives.

The number of knives is part of the machine's original cutting design. The mounting position, knife angle and fastening arrangement should also be checked.

If you only need replacement knives rather than a complete disc, review the available Chipper Blades.

4. Required Chip Length and Production Capacity

What chip size does your production process require?

The reference specifications list different chip-length ranges, including 12–35 mm, 20–35 mm and 25–35 mm.

The listed machine capacities range from 8 to 290 m³/h, depending on the model.

These figures are model references, not guaranteed output under every operating condition. Raw material type, log diameter, moisture, feeding conditions and required chip dimensions can all influence actual production.

For downstream size classification, see the Wood Chips Screen.

5. Feeding and Discharge Arrangement

The reference series includes horizontal and inclined feeding configurations, as well as different discharge arrangements.

When replacing a major component, it is important to identify the exact machine configuration. The feeding direction and discharge layout help establish which machine design and component arrangement you have.

For other wood preparation equipment, see the Drum Chipper and the Material Conveying Equipment Guide.

6. What Information Should You Send to the Supplier?

To identify a replacement knife disc, prepare as much of the following information as possible:

If the original drawing is unavailable, clear photographs of the complete disc, mounting area and identification plate can be useful.

You may also need other cutting components. Explore Chipper Machine Spare Parts and Chipper Drum for related wood chipping equipment components.

Make Replacement Easier with Accurate Information

A disc chipper knife disc is a precision-related rotating component. Correct dimensions and mounting details are essential when planning a replacement.

Whether you need a complete knife disc, replacement blades or other wear parts, provide the original machine details first.

Do you have a disc chipper knife disc that needs replacement? Send the machine model, dimensions, drawings or photographs to discuss the required configuration.

Explore more wood processing equipment and spare parts at the product website.