Upgrade your NORTHWOOD CT-200 8" Jointer with a Sheartak helical cutterhead for smoother cutting, reduced noise, longer cutting-edge life, and easier maintenance.
This cutterhead is equipped with 40 carbide inserts arranged in 5 helical rows. Each insert is positioned at a slight angle to create a shear-cutting action, while the staggered cutting pattern reduces the full-width impact associated with traditional straight knives.
Benefits of the Sheartak Helical Cutterhead
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Smoother Finish with Less Tear-Out
The angled carbide inserts create a shear cut that helps produce a smooth surface while minimizing tear-out, particularly when working with figured or difficult hardwoods.
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Reduced Cutting Noise
Because only a small number of inserts engage the workpiece at any given moment, the staggered cutting action helps reduce operating noise compared with traditional straight knives.
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Long Carbide Cutting-Edge Life
The cutterhead uses C3++ grade sintered tungsten carbide inserts. Each insert has four usable cutting edges, providing excellent wear resistance and significantly longer service life than conventional high-speed steel knives.
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Quick and Easy Insert Rotation
The precision-ground carbide inserts are interchangeable and manufactured to a tolerance of approximately ±0.0004" (±0.01 mm). When one cutting edge becomes dull or damaged, simply loosen the screw, rotate the insert 90°, properly reseat it, and retighten the screw.
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Improved Chip Extraction
The helical cutting action produces smaller and shorter chips, helping improve dust and chip extraction.
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Lower Maintenance Requirements
Individual carbide inserts do not require traditional knife sharpening or knife-setting procedures. The improved surface finish can also reduce the amount of sanding required after jointing.
Specifications
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Compatible Machine: NORTHWOOD CT-200 8" Jointer
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Cutterhead Material: AISI 5140 high-tensile-strength alloy steel
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Insert Material: C3++ grade carbide
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Carbide Insert Size: 15 × 15 × 2.5 mm, R150
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Number of Inserts: 40
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Number of Helical Rows: 5
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Tool Type: Torx T-handle wrench
Kit Includes
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
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.
