Whiteside RU4100 Standard Upcut Spiral Router Bit Solid Carbide 3/8" Cutting Diameter 1" Cut Length 3/8" Shank 2 Flute
Whiteside RU4100 Standard Upcut Spiral Router Bit Solid Carbide 3/8" Cutting Diameter 1" Cut Length 3/8" Shank 2 Flute is backordered and will ship as soon as it is back in stock.
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Low Price Guarantee
Low Price Guarantee
At Holbren we believe we have the best pricing and total cost on the internet but if you do find a price on an item we sell in new condition we will match it and still maintain our low to free shipping rates.
The competing reseller must be authorized by the manufacturer to sell their product, have it in stock, and the company name must be verified. Holbren will price match drop ship items if we have to drop ship as well and that would only be some models of Byrd heads. Authorized resellers do not include Ebay sellers or other online sales websites where the name may be different than the company name and unverifiable.
Price match guarantees are for the cost of the item and any applicable shipping a competitor may charge and include any sales, promotions or free shipping specials from competitors.
Send us an email to sales@holbren.com and we'll work it out.
30 Day Satisfaction Guarantee
30 Day Satisfaction Guarantee
If you are not completely satisfied with your purchase, we offer a 30 day satisfaction guarantee and the item can be returned for a full refund less shipping charges paid by the customer. The customer is responsible for all return shipping charges and credit will be applied when the item is received.
The only exclusion to this offer is items sold under the Byrd brand name, under most circumstances we must pass along a 25% restocking fee that we are charged.
If you wish to return an item, please email us at sales@holbren.com with the details.
Meet the Whiteside RU4100 Standard Upcut Spiral Router Bit — a durable, precise tool designed for woodworkers and CNC users who demand reliable performance and clean results. This solid carbide bit delivers consistent cuts with a practical size for everyday routing tasks.
Features
- Cutting Diameter: 3/8" (0.375")
- Cut Length: 1"
- Overall Length: 2-1/2"
- Shank Diameter: 3/8"
- Flutes: 2-flute (double flute)
- Spiral Design: Upcut
- Material: Solid carbide
Benefits
- Upcut spiral design promotes efficient chip evacuation and helps maintain clear cuts, especially in plywood and composite materials.
- Solid carbide construction offers enhanced edge retention for longer tool life and consistent performance.
- 2-flute geometry provides a balanced combination of material removal and surface finish for general-purpose routing.
- 3/8" shank fits most routers and CNC machines with standard 3/8" collets, ensuring broad compatibility.
- Compact cutting depth (1" cut length) and overall length (2-1/2") enable controlled, precise passes in pockets and profiles.
- Ideal for everyday routing tasks where reliable accuracy and clean results are essential.
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Cutting diameter
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Cutting length
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Overall length
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WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.

Whiteside Machine
Whiteside Machine Company, founded in 1970 by Bill and Bobbie Whiteside in North Carolina, started as a machine shop providing custom parts for the furniture and woodworking industries. Today, it has grown into a leading manufacturer of woodworking tools and equipment, known for innovation and quality solutions.

