Spiral Cutter Head for Moretens (Morten) RPH330 Thicknesser and Planer with 56 Carbide Inserts
Woodworkers are increasingly retrofitting spiral cutterheads to their older planers and jointers to enjoy several key benefits:
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Smoother Finish with No Tear-Out: Each knife is set at a slight angle, producing a shear-cut. The spiral cutterhead works in a staggered pattern, providing a much smoother cut compared to a single straight blade. The combination of shear and staggered cutting eliminates tear-out, leaving a glossy surface finish, even on highly figured hardwood.
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Reduced Noise: The spiral cutterhead’s staggered cutting action significantly reduces noise, as only a few knives cut at once.
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Longevity: The 15x15x2.5mm inserts are made of sintered tungsten carbide, which 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 interchangeable. Simply loosen the screw, rotate the insert 90° to expose a fresh edge, and tighten it back in place in just minutes.
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Efficient Dust Extraction: The spiral cutterhead produces thinner, shorter chips, making dust extraction more effective.
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Cost-Effective: Spiral cutterheads provide a smoother finish, reduce or eliminate sanding, and don't require sharpening. Your investment will quickly pay for itself.
Kit Includes:
IMPORTANT: The manufacturer of this machine has installed different cutter heads in the past. To ensure you receive the correct cutter head that fits your machine, we need to verify the sizes with you. This verification is typically done by checking the overall length, bearing numbers, shaft for pulleys, etc. For some machines, the cutter heads may need to be removed for accurate measurements. Once you place your order, we will send you a drawing to compare with your cutter head.
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.
