Just as their name implies, these bits are designed for increasing cutting feed rates and decreasing project cut out time in plywood, melamine, mdf, and most engineered products. The down cut spiral design ejects chips away from the router when routing through material. This design also decreases the tendency to lift thin/small work pieces during CNC routing.

TOOL SPECS: Solid carbide, down cut, roughing spiral with 3/8″ cutting diameter, 3/8″ shank, 1″ cutting length, and 3″ overall length for use in routers with a 3/8″ collet.
THREE FLUTES: Perfect for cutting wood, wood products, and plastics in high-volume applications where fast feed rates are essential and a fine finish is not required.
ROUGHING: Designed to remove most of the material from a cut, preparing the surface for a finishing bit to achieve a smooth, polished result.
DOWN CUT SPIRAL: The downwards cutting action is best suited for cutting completely through the material. Chips will be blown out the bottom of the cut and away from the router.
MACHINES: Designed for use on CNC machines, delivering precise and efficient cuts for a variety of woodworking projects.

Whiteside catalog page 5.

Part No.	RD4100H
Series	Roughing Down Cut Spiral
Description	Roughing Down Cut Spiral, 3/8" Shank, 3/8" Dia, 1" CL, 3" OAL
Shank	3/8"
Cutting Diameter	3/8"
Cutting Length	1"
Overall Length	3"
Profile	Down Cut
Materials	Natural woods, composites
Recommended RPM	16,000-18,000 (max 24,000)

Part No.	Shank	Cutting Diameter	Cutting Length	Overall Length	Profile	Price
RD4100H	3/8"	3/8"	1"	3"	Down Cut	$77.09 Add to cart
RD4125H	3/8"	3/8"	1-1/4"	3"	Down Cut	$78.31 Add to cart
RD5125H	1/2"	1/2"	1-1/4"	3"	Down Cut	$126.47 Add to cart
RD5162H	1/2"	1/2"	1-5/8"	3-1/2"	Down Cut	$150.78 Add to cart
RD5218H	1/2"	1/2"	2-3/16"	4"	Down Cut	$189.71 Add to cart
RD6200H	5/8"	5/8"	2"	4"	Down Cut	$189.73 Add to cart
RD7200H	3/4"	3/4"	2"	4"	Down Cut	$223.79 Add to cart
RD7325H	3/4"	3/4"	3-1/4"	6"	Down Cut	$301.64 Add to cart

Brand

Whiteside

Need This Tool Customized?

Every machining application is different. If this tool is close to what you need but not an exact fit, General Cutting Tools can help modify it for your specific job, machine, material, or production requirement.

We work with CNC shops, industrial manufacturers, tool rooms, and production facilities to provide tool modifications that improve fit, function, performance, and efficiency. Whether you need a small adjustment or a more specialized cutting tool solution, our team can review your requirements and recommend the best option.

Custom tool modifications can help reduce setup time, improve accuracy, extend tool life, solve clearance issues, and support more consistent production results.

Common Tool Customization Options

Diameter and OD Modifications

We can modify tool diameters to better match your application requirements, including cutting diameter changes, OD modifications, pilot diameter adjustments, step diameters, and shank diameter modifications.

Bore Modifications for Saw Blades

Custom saw blade bore modifications are available for hole diameter changes, pinholes, mounting holes, and keyway cutouts to help match your machine setup and cutting requirements.

Length Adjustments

Tools can be modified for specific reach, clearance, or setup needs. This may include overall length changes, flute length adjustments, reduced neck sections, extended reach designs, or shortened tools for improved rigidity.

Shank Modifications

Shank modifications can help ensure the tool fits properly in your holder, spindle, or machine setup. Common options include shank diameter changes, flats, Weldon flats, reduced shanks, and custom holding requirements.

Radius, Chamfer, and Corner Changes

We can customize corner radius, chamfer angles, edge breaks, and other profile details to meet part print requirements or improve cutting performance.

Step Tool Modifications

For applications that require multiple diameters or operations in a single tool, we can create or modify step tools to help reduce tool changes and improve production efficiency.

Flute and Cutting Edge Adjustments

Depending on the tool and application, flute length, cutting edge geometry, end cutting features, relief angles, and cutting edge shape may be modified to improve chip evacuation, cutting action, and tool performance.

Regrinding and Resharpening

Many cutting tools can be reground or resharpened to restore performance, extend tool life, and reduce replacement costs.

Custom Profiles and Special Forms

For unique part features, we can help provide special forms, custom profiles, custom radii, counterbores, countersinks, keyseat cutters, form tools, and other application-specific tooling solutions.

Material-Specific Tool Adjustments

We can help modify or recommend tooling based on the material being machined, including aluminum, brass, bronze, plastics, stainless steel, hardened steel, cast iron, composites, and other industrial materials.

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Coating Options

Tool coatings can be selected or added to improve wear resistance, heat resistance, lubricity, and performance in specific materials such as steel, stainless steel, aluminum, cast iron, and high-temperature alloys.

Request a Custom Tool Modification

Need this tool changed for your application? Contact General Cutting Tools today to discuss your custom tooling needs. We can help you find the right solution for your machine, material, and production goals.

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Whiteside RD4100H Roughing Down Cut Spiral, 3/8″ Shank, 3/8″ Dia, 1″ CL, 3″ OAL