Sheartak Helical Cutterhead for ROCKWELL 37-130 4” Jointer – Complete Upgrade Kit with Carbide Inserts
Upgrade your ROCKWELL 37-130 4" jointer with a premium Sheartak helical cutterhead and experience professional-grade performance, smoother cuts, and dramatically reduced noise. Woodworkers worldwide are retrofitting their jointers and planers with spiral/helical cutterheads for the unmatched advantages they deliver.
Why Choose a Sheartak Helical Cutterhead?
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Ultra-Smooth, Tear-Out-Free Finish
Each carbide insert is mounted at a slight angle to create a true shear cut. Combined with the staggered spiral layout, this design virtually eliminates tear-out and leaves a glass-smooth surface—even on difficult, highly figured hardwoods.
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Significantly Reduced Noise
Only a few inserts engage the wood at a time, resulting in a quieter woodworking experience compared to traditional straight-knife cutterheads.
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Long-Life Carbide Inserts (10× Longer Than HSS)
The 15×15×2.5 mm inserts are made from premium sintered tungsten carbide, offering exceptional durability. Each insert provides four sharp cutting edges—simply rotate to a fresh edge when needed.
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Quick, Hassle-Free Maintenance
Precision-ground inserts (±0.0004" / ±0.01 mm) ensure perfect interchangeability. Loosen the screw, rotate the insert 90°, tighten—done in minutes.
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Improved Dust Extraction
Spiral cutting produces finer, shorter chips, making dust collection more efficient and keeping your workspace cleaner.
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Lower Operating Costs
No sharpening needed, less sanding required, and dramatically longer tool life—your investment quickly pays for itself.
What’s Included
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.
