Upgrade the performance of your 25" Planer/Molder Model 725PM with the Sheartak Helical Cutterhead.
Equipped with 162 carbide inserts featuring curved edges, these inserts are strategically arranged along helical grooves at an angle, ensuring a true shear-cut. This upgrade will transform your planer, providing smoother cuts and superior results while reducing tear-out more effectively than traditional straight-knife cutterheads or other helical and spiral alternatives.
The Sheartak helical cutterhead delivers an exceptional finish, even on highly figured, challenging wood. Its indexable carbide inserts are more resistant to nicks and cracks compared to standard HSS knives. If an insert becomes dull or damaged, simply rotate it to expose a fresh, sharp edge—no need for time-consuming blade removal or sharpening. When all edges on an insert are worn out, replacing them is quick and easy with just a few turns of a Torx wrench, significantly reducing downtime.
Unlike traditional straight knives that make full contact with the material during every rotation, increasing shop noise, the staggered carbide inserts of the Sheartak helical cutterhead ensure that only one or two inserts contact the wood at any given time. This results in quieter operation and a more pleasant working environment.
The Sheartak helical cutterhead fits your original shafts perfectly, and installation is straightforward. Plus, it comes with a one-year warranty from the date of purchase.
Upgrade now and experience the difference!
Specifications
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Material of Cutterblock: AISI 5140 high tensile strength alloy steel
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Material of Insert: Grade C3++
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Carbide Insert Size: 15x15x2.5mm, R150
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Wrench Size: Torx head T type
Kit Includes:
- All carbide inserts installed
- 5 extra carbide inserts
- 5 extra Torx screws
- 1 T-handle 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.
