Sheartak Helical Cutterhead for WEN JT630H 6-Inch Benchtop Jointer
The original cutterhead on the WEN JT630H is equipped with 14 two-edge high-speed steel (HSS) blades, which tend to wear out quickly. Sheartak offers a premium upgrade — a precision-engineered helical cutterhead fitted with 20 four-edge solid carbide inserts, arranged at an angle to the feed direction for a true shear cut. This design provides the following key advantages:
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Superior Surface Finish with No Tear-Out
Each insert is set at a slight angle, creating a shear-cutting action. The staggered spiral layout ensures a smoother cut, significantly reducing tear-out and leaving a glossy finish even on highly figured hardwoods.
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Significantly Lower Noise Levels
Unlike traditional cutterheads, the spiral design reduces noise by allowing only a few inserts to engage the material at any given moment.
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Extended Tool Life
The 15x15x2.5mm inserts are made from sintered tungsten carbide, which is over 10 times more durable than high-speed steel. Each insert has four usable cutting edges — simply rotate to expose a fresh edge when needed.
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Quick and Easy Maintenance
Inserts are precision-ground to within ±0.0004" (±0.01mm) and fully interchangeable. Rotate each insert 90° to reveal a new edge — no alignment or sharpening required.
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Improved Chip Removal
The spiral configuration produces thinner, shorter chips, making dust collection more efficient and reducing clogging.
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Cost-Effective Performance
With a longer lifespan, minimal maintenance, and drastically reduced sanding time, this upgrade pays for itself quickly through time and cost savings.
Kit Includes:
- Fully assembled cutterhead with all carbide inserts pre-installed
- 5 spare carbide inserts
- 5 extra Torx screws
- 1 T-handle Torx wrench
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.
