Premium CNC & Router Bits for Precision Cutting

Undersized 0.490″ Router Bit Bearing x 1/4″ID – Whiteside B9U

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 1/4″ Inside Diameter

Undersized 0.490″ Router Bit Bearing x 1/4″ID – Whiteside B9U - Main image
$7.36 $10.99 In stock

Category: Router Bit Bearings

This Whiteside B9U router bit bearing is an undersized replacement part with a 0.490-inch outer diameter and a 1/4-inch inner diameter, designed for use with compatible Whiteside router bits.

  • Undersized 0.490-inch bearing diameter for precise routing applications.
  • 1/4-inch inner diameter to fit standard arbor sizes.
  • Manufactured by Whiteside, a trusted name in router bit accessories.
  • Suitable as a replacement bearing for select Whiteside router bits.
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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 (5.0 / 5 · 5 reviews)

Eva K. ★★★★★

This 0.490″ bearing was just what I needed to dial in my flush-trim work after a slight template shift. It spins smoothly and fits the 1/4″ shaft perfectly.

Avery ★★★★★

Finally got the trim flush on my pattern work - this bearing spins smoothly and the 0.490 diameter is exactly what my setup needed for that hair's width of offset. Slips right onto the 1/4" shaft with no wobble.

Adam ★★★★★

The outer diameter measures exactly 0.490" with my calipers, so it's a proper undersized fit for trimming flush without leaving a proud edge. Slipped onto the 1/4" shank smoothly and ran true with zero vibration on my last test cut.