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Your cart is empty.Whiteside Machine Company has been in the router bit business for over 30 years providing customer with quality products while at the same time striving to achieve complete customer satisfaction. Several woodworking magazines have tested Whiteside versus the competition and selected Whiteside as the winner for best router bits available in the market. Whiteside Machine Company was founded in 1970 as a general purpose machine shop in the basement of Bill & Bobbie Whiteside's home. Located in Western North Carolina near the furniture manufacturing town of Hickory, the company was often involved in making repairs or special parts for the furniture and woodworking field. A strong commitment to customer problem-solving, a can-do attitude, and innovative ideas, along with a growing core of dedicated employees, helped the business evolve into a manufacturer of woodworking equipment and tooling. Primarily through repeat business and referrals, the tooling business continued to grow to meet a demand for quality production router bits as well as custom application tooling. Today, Whiteside Machine occupies a 40,000 sq. ft. manufacturing facility and produces a complete line of solid carbide and carbide tipped router bits. Whiteside's quality, innovation, and customer commitment is still present in our superb product line, in the design of custom tooling to fill special customer requirements, and in the development of special machinery and tooling for our own manufacturing use. As always, Whiteside Machine is continuously striving to improve our product through new technology, improved production techniques, and ongoing research and development efforts; along with rigid quality control, vital customer feedback and extensive field testing. Whiteside Machine Company.
Craig C.
Reviewed in the United States on August 19, 2023
Needed something to adapt to a 3/8” spiral bit to my router. This is cheaper than getting a similar bit with a standard 1/2” base and I can reuse it.
Bobby Boucher
Reviewed in the United States on July 28, 2023
Bought it to use a 3/8 shaft spiral bit. It locks up correct and spins true so nice adapter at a good price!
Carl
Reviewed in the United States on March 7, 2022
It works like advertised.
lynne
Reviewed in the United States on August 17, 2021
I needed this to make the center cutting router bits able to work in my WEN Plunge Router . Other wise you get these small round spots where the Router bit went in and did not cut center
Kirk Davenport
Reviewed in the United States on November 19, 2018
This works as an insert to the 1/2 collet. Simply slips in and allows you to use a 3/8ths shaft. Works perfect for my Makita router and the upcut spiral bit!
Joseph Stillwell
Reviewed in the United States on March 12, 2017
Well balanced bit adapter. I used this to put a 3/8 inch spiral upcut bit (RU4125) in my router that only has 1/4 and 1/2 collets. It worked perfectly and there was no vibration. It's also cheaper to buy this and the bit than to get the 3/8 inch bit that steps up to 1/2 (RU4900)
Sean
Reviewed in the United States on February 26, 2014
Quality is quite good. It holds the bit well. No issues with length.I would recommend this to a friend.
WB Halper
Reviewed in the United States on November 10, 2013
I have two different collets from two different manufacturers...one holds 1/4" bits; the other is this one and holds 3/8" bits. The 1/4" Makita collet has three silts - one is cut all the way through and the two others are cut almost all the way through. When you tighter the outer 1/2" collet, the almost-all-the-way-through slits act like hinge points and allow the adapter to clamp down on the inner bit. That particular design is very sensitive to the shaft size of the 1/4"bit. If the shaft is exactly the same diameter as the hole, it works well. If the shaft is even a few ten thousandths smaller, the force is concentrated in a line midway between the slits instead of being equally distributed around the entire shaft. As a result, it doesn't grip nearly as tightly as it should.The Whiteside collet adapter uses a different approach. From both the top and bottom, through slits are cut most of the length of the adapter. The result is a set of interlocking fingers that run most of the length of the collet. When the outer 1/2" collet is tightened, the fingers press against the shaft for their entire length. It distributes the force well and can better accommodate slight variations in bit shank size. It works extremely well. The picture is NOT the Whiteside collet; rather it's the Makita three slit design.
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