Spiral Cutterhead for Bernardo Thicknessing Machine TH 330 (40 Knives)
Upgrade your Bernardo TH 330 Thicknessing Machine with our high-performance spiral cutterhead, designed to deliver superior results for woodworkers. Featuring 40 precision-engineered carbide inserts, this cutterhead offers unmatched cutting quality and efficiency.
Key Benefits
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Superior Finish: Each knife is angled for a shear cut, producing a glossy, tear-out-free surface, even on highly figured hardwoods. The staggered cutting action ensures a smoother finish than traditional straight cuts.
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Reduced Noise: The spiral design allows a few knives to cut at a time, significantly lowering noise levels during operation.
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Extended Lifespan: Made from sintered tungsten carbide, the 15x15x2.5mm inserts are over 10 times more durable than high-speed steel, with each insert offering four usable edges.
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Easy Maintenance: Precision-ground inserts with a tolerance of ±0.0004" (±0.01mm) are interchangeable and easy to rotate or replace in minutes—simply loosen the screw, rotate 90°, and tighten.
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Efficient Dust Extraction: Produces thinner, shorter chips for easier dust collection and a cleaner workspace.
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Cost-Effective: Delivers a smooth finish that reduces or eliminates sanding, with no sharpening required, making it a cost-efficient upgrade that pays for itself quickly.
Kit Includes
- Spiral cutterhead with 40 pre-installed carbide inserts
- 5 extra carbide inserts
- 5 extra Torx screws
- 1 T-handle wrench
Transform your woodworking experience with this spiral cutterhead, engineered for precision, durability, and ease of use.
Do I need to replace the original bearings?
If the bearings in your machine are in good condition, they can be reused by carefully removing them with a bearing or pulley puller. However, if the bearings are tightly pressed onto the shaft, removal may cause damage. To minimize this risk, we recommend replacing old bearings with our greased and sealed bearings, designed for long-lasting performance. For a smooth upgrade, we suggest adding the bearings to your shopping cart before completing your purchase.
We provide premium bearings from NSK, SKF, NTN, FAG, Timken. They are renowned for their high quality and performance, designed to provide durability and reliability in various applications
If you add the bearings to your order, we will preinstall them for you when premounting is possible, saving you the hassle of doing it yourself.
Do I need to to Add a Few Boxes of Carbide Inserts
We provide 5 carbide inserts and 5 screws as spare parts. However, many of our customers choose to purchase additional boxes, as the shipping costs for separate purchases can make it less economical.
Do I need a Torque Wrench?
To securely lock the carbide inserts, we recommend applying a torque of 48 to 52 Pound-Inches (or 5.42 to 5.88 Newton-Meters). (Note: 1 Newton-Meter is equal to 8.851 Pound-Inches, and 1 Pound-Inch is approximately 0.113 Newton-Meters.) It is crucial not to apply excessive torque, as this could cause the carbide inserts to crack or explode. On the other hand, using too little torque may result in the inserts not being properly secured, which could lead to cracks, shattering, or uneven height on the cutter block, causing ridges or lines on the board.
If one person is responsible for maintaining the machine, they can typically apply the same torque consistently without a torque wrench. However, when multiple people are involved in machine maintenance, ensuring uniform torque application can be challenging. For consistency and peace of mind, we recommend using a torque wrench.
What kind of steel the cutter block is made of?
The cutter block is constructed using GB/T 40Cr, a structural alloy steel of the same caliber as ASTM grade 5140, AISI 5140, SAE 5140, DIN 41Cr4, BS 41Cr4, JIS SCr440, and EN 41Cr4.The primary components of this steel are as follows: carbon (C) at a range of 0.37-0.44%, silicon (Si) between 0.17-0.37%, manganese (Mn) within 0.50-0.80%, and chromium (Cr) from 0.80-1.10%.
In terms of physical properties, this steel exhibits a tensile strength range of 115-234σb/MPa, a yield strength of 2σ 0.2 ≥/MPa, and an elongation capacity of 65 δ5≥ (%). It also has a HBS range of 123-321 and a HRC rating of 30.
This alloy steel is frequently utilized in low to moderately stressed components for machines, engines, and vehicles.