Sheartak Spiral Cutterhead for King KC-8HJC 8" Bench Top Jointer
Woodworkers are upgrading their old planers and jointers by retrofitting them with spiral cutterheads, which offer several advantages:
1. Improved Surface Finish: The spiral cutterhead features knives that are angled to produce a shear-cut, resulting in a smoother finish with no tear-out. The staggered cutting pattern is superior to a single straight cut and eliminates any roughness, even on highly figured hardwood.
2. Reduced Noise: The spiral cutterhead cuts with a staggered motion, reducing noise levels.
3. Increased Lifespan: The spiral cutterhead is made with sintered tungsten carbide inserts that have four edges, providing more than 10 times the life use of high-speed steel.
4. Easy to Change: The knives are interchangeable and precision ground to a tolerance of +/-0.0004" or +/-0.01mm. Changing knives is a breeze: loosen the screw, rotate 90° for a new edge, and tighten the insert in minutes, reducing production time by 30%.
5. Improved Dust Extraction: The spiral cutterhead produces thinner and shorter chips, making dust extraction easier.
6. Low Cost to Use: The spiral cutterhead produces a smoother finish, reducing or eliminating the need for sanding. With no sharpening required, the product pays for itself in a short time.
Kit Includes:
* High tensile strength alloy steel cutter block.
* 24 carbide inserts installed.
* 5 extra carbide inserts.
* 5 extra screws.
* 1 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.
