Enhance your premium Felder woodworking tools from Austria's renowned Felder Group with our meticulously engineered spiral cutterhead solutions. Specifically designed for Felder Format4 and Hammer brand jointer-planers including the AD-941, CF-741, and A3 series—our retrofit technology complements these precision-engineered European machines with cutting-edge carbide insert systems that rival their proprietary Silent-POWER technology.
Our aftermarket cutter head assemblies provide performance characteristics that serious woodworkers demand from Austrian machinery. Each unit incorporates precision-indexed carbide cutting elements arranged along calculated helical paths, with every insert positioned at the mathematically optimal shear angle. This geometry produces the continuous pulling cut that Felder owners appreciate—eliminating fiber tear-out on figured species while maintaining the dimensional accuracy these cast iron machines are famous for delivering.
Manufactured as industrial-grade mechanical components that meet the exacting standards expected by Felder Group equipment owners, our cutterheads undergo comprehensive dynamic balancing before shipment. The acoustic improvement proves dramatic—our spiral cutterhead jointer upgrades achieve noise reductions comparable to Felder's own Silent-POWER system, transforming your workshop into a pleasant environment where the subtle hum of precision machinery replaces the traditional percussive blade impact.
Professional-grade carbide inserts distinguish these woodworking tools from economy alternatives. Manufactured from C3++ grade tungsten carbide rather than standard C2 material, each insert maintains its geometry through extended production runs. The four-edge design means a quick rotation with your Torx wrench provides three knife changes before replacement becomes necessary—particularly valuable given the investment Felder owners have made in their primary machinery.
Upgrading Felder woodworking tools with our spiral cutterheads respects the Austrian engineering philosophy that prioritizes longevity and precision. These retrofits prove especially suitable for older Felder and Hammer machines predating the Silent-POWER era, allowing owners to modernize proven workhorses without sacrificing the cast iron construction and prism-guided table systems that define European manufacturing excellence. Preserve your investment while embracing contemporary cutting technology.
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.
