Spiral Cutter Head for Moretens (Morten) RPH410 Thicknesser and Planer with 72 Carbide Inserts
Woodworkers are increasingly retrofitting spiral cutterheads to their older planers and jointers for several key benefits:
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Smoother Finish with No Tear-Out: Each knife is positioned at a slight angle, producing a shear-cut. The spiral cutterhead works in a staggered pattern, offering a superior result compared to a single straight cut. This combination of shear and staggered cutting eliminates tear-out, leaving behind a glossy surface finish, even on highly figured hardwoods.
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Reduced Noise: The spiral cutterhead’s staggered cutting pattern significantly reduces noise, as only a few knives cut at a time.
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Extended Tool Life: The 15x15x2.5mm inserts are made from sintered tungsten carbide, a material that is over 10 times more durable than high-speed steel. Each insert features four cutting edges.
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Easy to Replace: The precision-ground knives, with a tolerance of +/-0.0004" (or +/-0.01mm), are fully interchangeable. Simply loosen the screw, rotate the insert 90° to reveal a new edge, and tighten it back in place within minutes.
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Improved Dust Extraction: The spiral cutterhead produces thinner and shorter chips, making dust extraction more efficient.
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Cost-Effective: With a smoother finish, reduced sanding time, and no need for sharpening, the spiral cutterhead will quickly pay for itself.
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
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.
