Adapter Bushings (Router Collet Reducers)

Steel Adapter Bushings

See Options Below

SAVE $14.70 with Set!

Shop with Confidence. Our GUARANTEE.

Used to reduce the collet size for smaller diameter shank bits. Used for router bits, end mills, drill bits, and dremel bits. Never exceed the recommended RPM of the cutting tool.

7 Piece Adapter Bushing Set: SAVE $14.70

Set #300 includes all 7 sizes (excluding 1/2" OD x 8mm ID).

Router Safety Chart - Suggested Speeds:

Bit Diameter Max Speed
up to 1" 24000 RPM
1-1/16" to 2" 18000 RPM
2-1/16" to 2-1/2" 16000 RPM
2-9/16" to 3" 14500 RPM
over 3" 12000 RPM

Router Safety Tips:

  • Always wear eye and ear protection.
  • Always use properly sharpened bits.
  • Never use bits that are dull or damaged.
  • Shank must be completely inserted into collet and then backed-off approximately 1/16".
  • Don't "bottom-out" bit in collet.
  • Never partially insert bit into collet. Minimum 1" of shank needs to be in collet.
  • Tighten bit securely and recheck periodically for possible slippage or "run-out" due to wear.
  • Keep collet clean and replace if worn.
  • Never start the router with the bit in contact with wood.
  • Always feed your work or router in the proper direction against the bit rotation.
  • Don't force feed the bit or overload your router, Feed at a constant moving speed to avoid burning the wood.
  • Do not face tool's discharge when operating.
  • Always unplug router when changing bits or making adjustments.
  • Use a router table and fence whenever possible.
  • Make sure your work piece is properly secured and use push blocks, sticks and featherboards whenever possible.
  • Keep all your bits, bearings and assemblies clean, lubricated, and securely fastened. To avoid damage, store them properly in a pouch, box or tray.
  • The bigger the bit, the lower RPM recommended (see chart).

Product Options

Outside Diameter Inside Diameter Item # Price    Qty
Adapter Bushing (Collet Reducer) 7 Piece Set 300 REG. $49.65
SALE $34.95
SAVE $14.70!
1/4" 1/8" #271
(Old/Eagle 198-0305)
$6.95
1/4" 3/16" #272
(Old/Eagle 198-0307)
$6.95
1/2" 1/8" #273
(Old/Eagle 198-0401)
$7.95
1/2" 3/16" #274
(Old/Eagle 198-0403)
$6.95
1/2" 1/4" #275
(Old/Eagle 198-0405)
$6.95
1/2" 5/16" #276
(Old/Eagle 198-0407)
$6.95
1/2" 8MM #243
(Old/Eagle 198-0505)
$6.95
1/2" 3/8" #277
(Old/Eagle 198-0605)
$6.95

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