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VIEW PRODUCTSDisc Chipper Knife Disc for Industrial Wood Chipping Machines
Nov 11,2026
What makes a disc chipper cut wood into uniform chips? The knife disc is one of the key components.
A disc chipper knife disc is the main rotating cutting component of a disc-type wood chipping machine. It carries the cutting knives and works with the feeding system to convert logs and other suitable wood materials into wood chips.
The knife disc is widely relevant to wood preparation operations in pulp and paper mills, MDF plants, particleboard factories and other wood processing facilities.
1. Product Overview
The knife disc is installed inside the disc chipper housing and connected to the machine's drive system.
During operation, the disc rotates at its designed speed while the feeding system directs wood toward the cutting area. The knives mounted on the disc perform the cutting action, producing chips for subsequent processing.
A disc chipper generally consists of:
Machine frame and supporting structure
Knife disc assembly
Cutting knives and fastening components
Feeding inlet
Machine housing
Drive and electrical control systems
The knife disc and the cutting knives work as a coordinated assembly. Their dimensions and arrangement must follow the original machine design.
2. Main Technical Specifications
The reference technical table covers several disc chipper models.
| Technical parameter | Reference specification |
|---|---|
| Knife disc diameter | 950–3,360 mm |
| Knife disc speed | 249–980 rpm |
| Number of knives | 6 / 8 / 16 |
| Wood chip length | 12–35 mm, 20–35 mm or 25–35 mm |
| Capacity | 8–290 m³/h |
| Maximum cutting log diameter | 100–700 mm |
| Feeding type | Inclined or horizontal, depending on model |
| Discharge type | Upper or bottom discharge, depending on model |
The figures above summarize the range shown in the technical reference table. Each parameter must be checked against the selected machine model.
3. Key Functions of the Knife Disc
Knife mounting
The disc provides the mounting positions for the knives. Accurate positioning and secure fastening are important for the cutting assembly.
Rotating cutting action
The disc transfers rotational movement from the drive system to the cutting knives. The operating speed is determined by the machine design.
Mechanical running stability
Because the knife disc is a rotating component, its condition, mounting accuracy and balance are important inspection points. Damage or abnormal vibration should be investigated before continued operation.
4. Surface Treatment and Wear Considerations
The technical description for this series specifies a wear-resistant chromium-plated knife disc.
In addition to the specified surface treatment, the following factors should be considered during inspection and maintenance:
Disc surface condition
Knife mounting areas
Fasteners and retaining components
Wear or damage around the cutting assembly
Disc running condition and balance
Compatibility with the drive and machine structure
For replacement cutting knives, visit the Chipper Blades page.
For additional replacement components, see Chipper Machine Spare Parts.
5. Applications
Disc chippers are used in several industrial wood preparation processes.
Pulp and paper industry: Wood logs are converted into chips for subsequent pulp processing. Chip dimensions are selected according to the process requirements.
MDF and particleboard production: Suitable wood materials are chipped before screening and further preparation.
Wood processing industry: Logs and other suitable wood materials can be reduced into chips for downstream utilization.
Biomass preparation: Selected wood raw materials can be processed into chips for further handling or utilization.
6. Related Wood Chipping and Screening Equipment
The cutting process is only one stage of a complete wood preparation system.
A Drum Chipper uses a rotating drum cutting assembly and is different from a disc chipper.
After chipping, a Wood Chips Screen can classify chips by size. The material is then transferred through suitable conveying equipment according to the plant layout.
7. Replacement and Customization Information
When sourcing a replacement disc chipper knife disc, the following information is recommended:
Original machine manufacturer and model
Knife disc diameter and thickness
Center bore and mounting dimensions
Number of knives and mounting arrangement
Operating speed
Material and surface treatment requirements
Original drawings, samples or photographs
The Chipper Drum is another type of rotating cutting component used in drum chippers. It should be specified separately from a disc chipper knife disc.
8. Find the Right Wood Chipper Components
The knife disc is a major part of the disc chipper cutting system. Correct dimensions, knife positioning and mechanical compatibility are essential for replacement planning.
For disc chipper knife discs, chipper blades and other wood chipping components, visit the wood processing machinery website or contact the supplier with your machine information for technical evaluation.
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