Sheartak Helical Cutterhead for RIKON13” Portable Planer 25-135H
The original cutterhead is fitted with 26 high-speed steel (HSS) inserts featuring two cutting edges. These blades tend to wear out quickly. Many woodworkers have upgraded their machines with Sheartak Helical Cutterheads, which use carbide inserts with four cutting edges and offer the following exceptional advantages:
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Smoother, Tear-Free Finish – Each insert is set at a slight angle, producing a shear cut. The spiral cutterhead planes the board with a staggered cutting action rather than a single straight cut. This combination of shear and staggered cutting virtually eliminates tear-out and delivers a glass-smooth surface, even on highly figured hardwoods.
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Significantly Reduced Noise – Only a few knives engage the wood at any given time, resulting in much quieter operation compared to traditional straight-blade cutterheads.
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Extended Tool Life – The 15 × 15 × 2.5 mm inserts are made of sintered tungsten carbide, which is far harder and more durable than HSS, lasting more than ten times longer. Each insert has four sharp edges that can be rotated as needed.
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Quick and Easy Maintenance – Precision-ground inserts (±0.0004" / ±0.01 mm) are fully interchangeable. Simply loosen the screw, rotate the insert 90°, and retighten—replacement takes just minutes.
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Improved Dust Extraction – The spiral design produces finer, shorter chips, making dust collection much more efficient.
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Cost-Effective Investment – Spiral cutterheads deliver a superior finish, reduce or eliminate sanding, and eliminate sharpening costs—allowing the tool to pay for itself in a very short time.
Kit Includes:
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High-tensile-strength alloy steel cutter block.
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Full set of pre-installed carbide inserts
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5 extra carbide inserts and 5 screws for spares
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One pair of premium sealed bearings
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Wrench for easy maintenance
Transform your planing experience with cleaner cuts, quieter operation, and improved efficiency.
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.
