CNC router tools for woodworking, metal machining, plastic cutting and composite cutting with precision collets and toolholders
Think & Tinker, Ltd.
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1/2 in. (12.7mm) OD Precision Collet Reducer

Collet reducers ALWAYS increase TIR.
They will NOT improve the runout of a spindle or router!


  • Architecture: 8-leaf, interleaved spring form
  • Steel: SAE 4130
  • Hardness: HRC 46 - 52
  • Surface Roughness: Rz 2.5
  • Internal hole by boring machine
  • Reducer Tolerance Grades:(read the Collet Selection tutorial)
    • EP (extreme-precision grade) TIR < 0.0001in (0.0025mm), TIR @ 1.0in. < 0.0002in.
    • UP (ultra-precision grade) TIR < 0.0002in (0.005mm)
    • PG (precision grade) TIR < 0.0004in (0.01mm)
    • SG (standard grade) TIR < 0.0006in (0.015mm)


  • compatible with all 1/2 in. capacity routers, spindles and adapter chucks
  • cheaper, and more convenient than press on bushings
  • better clamping and centering than conventional shank adapters
  • low noise operation
  • longer tool life
  • more accurate cutting and higher kerf fidelity
  • compatible with carbide microtools


  • Collet reducers ALWAYS increase TIR!
  • Collet reducers will NOT improve the runout of a spindle or router!

1/2" Collet Reducer
0.500 in. (12.7mm) OD spring-form
precision collet reducer
Reducers: Precision-
Reducers: Ultra-
Reducers: Extreme-

If your purchase is over US$50,
you save $5 in shipping!
    Sales Items    
Item # Description Unit Price Enter Qty.
CRPG-5000-1250  1/2 in. to 1/8 in. (0.1250") Precision-grade (PG) collet reducer (TIR < 0.0004 in.)   $16.95 
CRPG-5000-1875  1/2 in. to 3/16 in. (0.1875") Precision-grade (PG) collet reducer (TIR < 0.0004 in.)   $16.95 
CRPG-5000-2500  1/2 in. to 1/4 in. (0.2500") Precision-grade (PG) collet reducer (TIR < 0.0004 in.)   $16.95 
CRPG-5000-3750  1/2 in. to 3/8 in. (0.3750") Precision-grade (PG) collet reducer (TIR < 0.0004 in.)   $16.95 
Enter the desired quantity (Enter Qty) then click on the "Add to Cart" Button.

Open Monday - Friday, 08:30 to 16:30 Mountain Time.

Most orders received before noon ship within one business day,
subject to credit approval and item availability.
Orders with different billing and shipping
addresses may be delayed for address verification.

Sales  719 488-9640
FAX:  866-453-8473
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Updated 10/12/2016 12:43:35 PM