Premium CNC & Router Bits for Precision Cutting

Undersized 0.490″ Router Bit Bearing x 3/16″ID – Whiteside B3U

After you’ve sharpened your router bits a few times, you could find that the outside diameter has gotten a little smaller. The undersized 1/2″ bearing measures in a 0.49″. .049″ Outside Diameter 3/16″ Inside Diameter

Undersized 0.490″ Router Bit Bearing x 3/16″ID – Whiteside B3U - Main image
$5.27 $7.99 In stock

Category: Router Bit Bearings

This Whiteside B3U router bit bearing is an undersized replacement component designed for use with compatible router bits. With a 0.490-inch outer diameter and a 3/16-inch inner diameter, it offers a precise fit for specific routing applications.

  • Undersized bearing with 0.490-inch outer diameter
  • 3/16-inch inner diameter for compatibility with specific arbor sizes
  • Manufactured by Whiteside, a recognized name in router accessories
  • Suitable for use as a replacement bearing in various routing tasks
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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Richard ★★★★★

Went through a whole pack of these on one job and every single one measured dead-on 0.490 inches. The 3/16-inch bore sits snug on the arbor with zero wobble, so my edge work stayed perfectly clean.

Kevin ★★★★★

I was pleasantly surprised by how precisely this bearing fits my Whiteside bit—the 0.490-inch diameter made all the difference. The inner hole was spot-on, and the whole thing spins smoothly without any wobble. Definitely saved me from having to buy a whole new bit.

George R. ★★★★★

It’s reassuring to have a backup bearing that fits snugly and spins without wobble—the 0.490″ OD is noticeably tighter than the stock one, which solved my bit’s vibration issue. Shipping was quick, and I’m glad I grabbed a spare for the shop.