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1/2″ to 3/8″ Collet Reducer

This reduces your 1/2″ collet down so that it can hold a 3/8″ shank router bit. Made In USA by Elaire Corp. OD: 1/2″ ID: 3/8″ We also carry a full line of collet reducers from Whiteside .

1/2″ to 3/8″ Collet Reducer - Main image
$11.21 $16.99 In stock

Category: Router Collet CNC Collets

This collet reducer lets you use 3/8-inch shank router bits with a 1/2-inch collet, expanding the range of bits your router can accommodate.

  • Converts a 1/2-inch collet opening down to 3/8-inch for a secure fit with 3/8-inch shank bits.
  • Simple installation: place the reducer into the collet before inserting the bit.
  • Designed for use in router collets and CNC collets that accept standard 1/2-inch collets.
  • Helps maintain precision and stability when working with smaller shank tooling.
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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)

Julian ★★★★★

I’ve been meaning to try smaller bits on my big router for ages and this reducer finally made it happen. The 1/2" to 3/8" conversion is seamless and the bit sits dead-center every time, no wobble at all.

Ella C. ★★★★★

Finally, I can use my stash of 3/8-inch bits without swapping out the whole collet—the reducer slides in snug and holds true at high RPM. It’s a simple fix that’s saved me from buying duplicate bits.

Nicholas ★★★★★

Finally, my 3/8-inch bits fit snugly in my 1/2-inch collet without any wobble, which makes switching between projects way less of a hassle. The conversion is straightforward and it holds tight during heavier cuts, no complaints here.

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