Revolutionize your trusted Delta woodworking machinery with our custom-engineered spiral cutterhead upgrade solutions. Designed specifically for Delta planers and jointers, our comprehensive collection delivers exceptional performance that transforms these reliable machines into modern precision cutting systems.
Each precision-crafted cutter head represents a transformative upgrade over traditional straight-knife systems. Our helical design features premium tungsten carbide inserts arranged in optimized spiral configurations—from 30-insert 6" jointer models to 65-insert 13" planer systems—creating superior shear-cutting action that eliminates tear-out and delivers buttery-smooth finishes on hardwoods, softwoods, and figured materials.
These expertly manufactured mechanical components are built to exacting tolerances for perfect compatibility with Delta equipment, including popular models like the 37-220, DJ-15, DJ-20, 37-365X, and 22-660 series. Our spiral cutterhead jointer solutions deliver whisper-quiet operation that transforms your workshop experience—many woodworkers report forgetting to wear ear protection after upgrading their Delta machines.
The tungsten carbide inserts in these professional-grade woodworking tools maintain exceptional sharpness up to 50 times longer than high-speed steel blades. Each insert features four indexable cutting edges—simply rotate 90° for a fresh edge and return to work in minutes. This innovative design dramatically reduces downtime while eliminating expensive blade sharpening services that Delta straight-knife systems require.
Manufactured with high-tensile alloy steel construction, premium Japanese NSK sealed bearings pre-mounted for convenience, and backed by comprehensive warranty coverage, our Delta woodworking spiral cutterheads represent a strategic investment that pays for itself quickly. Experience amazingly clean finishes, dramatically reduced noise levels, and virtually eliminated sanding work—transforming your vintage Delta equipment into a lifetime cutting system built for professional results.
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
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.
