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Counterbore Bit


Counterbore Bit

DEWALT DW2535 3 Piece #6, #8, and #10 Countersink Assortment DEWALT DW2535 3 Piece #6, #8, and #10 Countersink Assortment
List Price: $45.08
Sale Price: $23.66
You save: $21.42 (48%)
 

  • Drill, countersink and counterbore in one step
  • Four-cutter countersink and tapered drill bit provide superior speed and ideal finish
  • Replacement tapered bits offered
General Tools 195-3/4 3/4-Inch Countersink Bit General Tools 195-3/4 3/4-Inch Countersink Bit
List Price: $17.52
Sale Price: $3.84
You save: $13.68 (78%)
 

3/4" HS Countersink, Pattern Cutting Flutes That Assure Chatter Free Countersink On Steel, Brass, Aluminum & Wood, Made Of High Speed Steel With 5 Flutes, 82 Degree Point Angle With 1/4" Round Shank.

  • 3/4"
  • 1/4" round shank
DEWALT DW2567  #6 Countersink with 9/64-Inch Drill Bit DEWALT DW2567 #6 Countersink with 9/64-Inch Drill Bit
List Price: $15.32
Sale Price: $8.03
You save: $7.29 (48%)
 

Quick, professional results are easy to achieve with the DeWalt DW2567 #6 countersink featuring a 9/64-inch tapered drill bit. DeWalt's unique design lets you work efficiently, reducing three steps into one: drill, countersink, and counterbore in a single step...

  • Drill, countersink and counterbore in one step
  • Four-cutter countersink and tapered drill bit provide superior speed and ideal finish
  • Replacement tapered bits offered
  • Tapered drill bit can be replaced for extended life
  • Weighs 3 ounces
W. L. Fuller 10393011C  #11 5-Piece Taper Drill Set W. L. Fuller 10393011C #11 5-Piece Taper Drill Set
List Price: $172.93
Sale Price: $134.99
You save: $37.94 (22%)
 

Our top-line taper drill set with quick-change chuck allows you to quickly and efficiently pre-drill, countersink, counterbore and cut plugs. Technical Details: For wood screw sizes #6, #8, #10, #12 and #14...

  • For wood screw sizes #6, #8, #10, #12, and #14
  • Countersinks combine pre-drilling for screw threads and clearance drilling for screw shank
  • Countersinks combine counterboring for wood plugs (if needed) and countersinking for the screw head
  • Plug cutters produce wood plugs to match their counterbores
  • Made in USA
Amana 55232 COUNTERBORE SCREW SLOT BIT 1/2 Amana 55232 COUNTERBORE SCREW SLOT BIT 1/2
List Price: $45.20
Sale Price: $33.90
You save: $11.30 (25%)
 

Counterbore Screw Slot Router Bit

Makita 784832-A Quad-Driver Pre-Drill, Drive and Countersink Set, 13-Piece Makita 784832-A Quad-Driver Pre-Drill, Drive and Countersink Set, 13-Piece
List Price: $51.40
Sale Price: $47.84
You save: $3.56 (7%)
 

13-piece set allows you to change drill accessories quickly and easily. Fits all Makita or other brand 3/8-inch and 1/2-inch drills. The Ultra Loc has a universal connection that fits popular 1/4-inch hex shank...

  • Do four jobs with one drill
  • Change from a drill and countersink to power screwdriver
  • No need to remove the driver from your power tool
  • Includes: quad driver shaft, built in hex key, No. 6, No. 8, No. 10, No. 12, countersink driver
  • Case included
DEWALT DW2568 #8 Countersink with 11/64-Inch Drill Bit DEWALT DW2568 #8 Countersink with 11/64-Inch Drill Bit
List Price: $15.84
Sale Price: $8.31
You save: $7.53 (48%)
 

The DeWalt countersink with tapered drill bit is ideal for fine-wood drilling and provides you with superior speed while leaving an ideal finish. Using a four-cutter countersink and 11/64-inch drill bit, this product is uniquely designed to allow you to drill, countersink, and counterbore all in one step...

FF301 CARBIDE TIP 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8 FF301 CARBIDE TIP 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8" SHANK
List Price: $36.72
Sale Price: $29.38
You save: $7.34 (20%)
 

WHITESIDE MACHINE FF301 CARBIDE TIP 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8" SHANK X 4" OAL - UNIQUE - EVANS - RITTER AND NORFIELD

  • AMERICAN MADE FOR THE AMERICAN WOODWORKER
  • MADE FROM SOLID ALLOY STEEL
  • PRECISION GROUND FOR PROPER BALANCE AT HIGH RPMS
  • MADE WITH THICK CARBIDE FOR EXTRA SHARPENINGS
  • USES THE HIGHEST QUALITY AMERICAN MADE MICROGRAIN CARBIDE
FF301SP CARBIDE TIP SPIRAL 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8 SH FF301SP CARBIDE TIP SPIRAL 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8 SH
List Price: $44.06
Sale Price: $35.25
You save: $8.81 (20%)
 

WHITESIDE MACHINE FF301SP CARBIDE TIP SPIRAL 2 FLUTE FACE FRAME COUNTERBORE BIT 3/8 DIA X NO 29 PILOT DRILL X 3/8" SHANK X 4" OAL - UNIQUE - RITTER - EVANS

  • AMERICAN MADE FOR THE AMERICAN WOODWORKER
  • MADE FROM SOLID ALLOY STEEL
  • PRECISION GROUND FOR PROPER BALANCE AT HIGH RPMS
  • MADE WITH THICK CARBIDE FOR EXTRA SHARPENINGS
  • USES THE HIGHEST QUALITY AMERICAN MADE MICROGRAIN CARBIDE
General Tools 195 5/8-Inch 1/4-Inch Shank Countersink General Tools 195 5/8-Inch 1/4-Inch Shank Countersink
List Price: $15.29
Sale Price: $3.00
You save: $12.29 (80%)
 

5/8" HS Countersink, Pattern Cutting Flutes That Assure Chatter Free Countersink On Steel, Brass, Aluminum & Wood, Made Of High Speed Steel With 5 Flutes, 82 Degree Point Angle With 1/4" Round Shank.

  • 5/8"
  • 1/4" round shank


what does it mean to counterbore a hole?

i'm putting together a saw horse and for the top i drilled a 5/16" hole to fit a bolt through that holds the braces for the legs. the bolt doesn't fit flush to the top but the instructions say to counterbore a with a 3/4" bit to 1/8" deep. am i just drilling into my existing hole with a larger bit? or is there something more that i'm missing? thanks.

Yes, you are just making the hole bigger at the surface with a larger bit. The head of the bolt should fit inside the larger hole so it will be more or less flush with the surface.

For future reference, it is usually easier to bore the larger hole first. Drill your 3/4" hole first, 1/8 - 1/4" deep depending upon the thickness of the head of the bolt. Then drill your 5/16" hole all the way through. The smaller bit will tend to center in the larger hole as the bit will create a bit of a cupped bottom.

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