Whiteside RU4858 8mm Diameter 1/2" Shank Spiral Upcut Router Bit
Whiteside RU4858 8mm Diameter 1/2" Shank Spiral Upcut Router Bit 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.
Experience professional-grade performance with the Whiteside RU4858 8mm Diameter 1/2" Shank Spiral Upcut Router Bit. This solid carbide, double-flute bit is engineered for efficient chip evacuation and precise, clean cuts across a range of woodworking applications. The 8mm cutting diameter and 1/2" shank offer versatile compatibility with standard routers, delivering dependable results in cabinetry, joinery, and detailed carpentry projects.
Product Highlights
- Spiral Upcut Design: Optimizes chip evacuation for smoother cuts and reduced clogging.
- Material: Solid Carbide for exceptional strength and long tool life.
- Flutes: Double Flute for faster material removal and a balanced cut.
- Cutting Diameter: 8 mm
- Shank Diameter: 1/2" (12.7 mm)
- Cut Length: 1"
- Overall Length: 3"
- Recommended Use: Ideal for through-cuts, pockets, and edge work on woodworking projects, delivering clean edges with each pass.
This RU4858 router bit is built for performance and consistency, helping you achieve professional-grade finishes with less effort and fewer passes. For best results, pair it with compatible 1/2" shank routers and feed rates suited to your material, and enjoy reliable operation and long-lasting sharpness.
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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.
