Upgrade your JET JJ-60S 6" Jointer with a Sheartak helical cutterhead for smoother cutting, reduced noise, longer cutting-edge life, and easier maintenance.
This cutterhead is equipped with 30 carbide inserts arranged for a shear-cutting action. Each insert engages the wood at a slight angle, producing a staggered cutting action rather than the full-width impact of traditional straight knives. This helps deliver a cleaner surface with significantly less tear-out, especially when working with figured or difficult hardwoods.
Benefits of the Sheartak Helical Cutterhead
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Smoother Finish with Less Tear-Out
Each carbide insert is positioned at a slight angle to create a shear cut. Combined with the staggered cutting pattern, this produces a smoother surface and helps minimize tear-out on figured and difficult grain.
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Reduced Cutting Noise
Instead of a straight knife contacting the full width of the workpiece at once, only a few carbide inserts are cutting at any given moment. This helps significantly reduce operating noise.
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Long Carbide Cutting-Edge Life
The 15 × 15 × 2.5 mm carbide inserts are manufactured from sintered tungsten carbide for excellent wear resistance and durability. Each insert has four usable cutting edges.
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Quick and Easy Insert Replacement
The precision-ground inserts are interchangeable and manufactured to a tolerance of approximately ±0.0004" (±0.01 mm). When one edge becomes dull or damaged, simply loosen the screw, rotate the insert 90°, properly seat it, and retighten the screw.
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Improved Chip Extraction
The spiral cutting action produces smaller and shorter chips, helping improve dust and chip extraction.
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Lower Maintenance Cost
Carbide inserts do not require traditional knife sharpening or setting. The improved surface finish can also reduce the amount of sanding required after jointing.
Standard Kit Includes
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High-tensile alloy steel helical cutterhead
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30 carbide inserts preinstalled
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Two Japanese NSK sealed bearings preinstalled
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5 additional carbide inserts
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5 additional Torx screws
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1 T-handle Torx key
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.
