Counterbores - Flat Bottom Long Reach

Carbide Counterbores - Flat Bottom Long Reach

  • Undersized neck to avoid heeling
  • Flat Bottom (No Dish) design allows spot facing or counterboring on irregular surfaces
  • Ideal for castings, rounded parts, concaved or drafted surfaces
  • Can be used for flat bottom reaming or straightening misaligned holes
  • Center cutting
  • Ground with full cylidrical margin (not side sutting)
  • 15° Helix
  • 4 Flutes
  • Solid carbide
  • CNC ground in the USA   

   Learn more about the features, benefits, and applications of Harvey Tool Holemaking Solutions

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Below are downloadable Simulation Files in DXF format (half-round line drawings) to accompany Harvey Tool products. Each file is specifically scaled to the geometry of the tool to help simulate running parameters and create tool paths. Like our speeds & feeds charts, these files will be continuously updated with the introduction of new products and new catalogs to assist operating the majority of our tools. Simulation files can also be accessed by searching for a specific tool number on the left-hand side of the website and then clicking on the Simulation table in the product table.
Please don’t hesitate to contact our tech team with any questions at 800-645-5609 or tech@harveytool.com.

To navigate between folders or download a file, DOUBLE CLICK on the folder or file.

  • AlTiN Coated
  • Amorphous Diamond
  • Uncoated
CUTTER
DIAMETER
FLUTE
LENGTH
OVERALL
REACH
SHANK
DIAMETER
OVERALL
LENGTH
UNCOATED AlTiN COATED
D1 +.0000"/-.0005"* L2 +.030"/-.000" L3 +.030"/-.000" D2 L1 4 FL PRICE 4 FL PRICE
.0312 (1/32) 1/8 1/4 1/8 2-1/2 25431 29.20 25431-C3 33.20
.0394 (1 mm) 5/32 5/16 1/8 2-1/2 2541M 29.20 2541M-C3 33.20
.0469 (3/64) 3/16 3/8 1/8 2-1/2 25447 29.20 25447-C3 33.20
.0625 (1/16) 1/4 1/2 1/8 2-1/2 25462 29.20 25462-C3 33.20
.0781 (5/64) 5/16 5/8 1/8 2-1/2 25478 29.20 25478-C3 33.20
.0787 (2 mm) 5/16 5/8 1/8 2-1/2 2542M 29.20 2542M-C3 33.20
.0937 (3/32) 3/8 3/4 1/8 2-1/2 25493 29.20 25493-C3 33.20
.1094 (7/64) 3/8 7/8 1/8 2-1/2 25507 29.20 25507-C3 33.20
.1181 (3 mm) 3/8 1 1/8 2-1/2 2553M 29.20 2553M-C3 33.20
.1250 (1/8) 1/2 1 1/8 2-1/2 25508 29.20 25508-C3 33.20
.1406 (9/64) 9/16 1-1/8 3/16 3 25509 35.60 25509-C3 39.90
.1562 (5/32) 5/8 1-1/4 3/16 3 25510 35.60 25510-C3 39.90
.1575 (4 mm) 5/8 1-1/4 3/16 3 2554M 35.60 2554M-C3 39.90
.1719 (11/64) 5/8 1-3/8 3/16 3 25511 35.60 25511-C3 39.90
.1875 (3/16) 3/4 1-1/2 3/16 3 25512 35.60 25512-C3 39.90
.2031 (13/64) 3/4 1-5/8 1/4 4 25513 47.50 25513-C3 54.50
.2187 (7/32) 3/4 1-3/4 1/4 4 25514 47.50 25514-C3 54.50
.2344 (15/64) 7/8 1-7/8 1/4 4 25515 47.50 25515-C3 54.50
.2500 (1/4) 7/8 2 1/4 4 25516 47.50 25516-C3 54.50
.2656 (17/64) 7/8 2-1/8 5/16 4 25517 60.30 25517-C3 68.80
.2812 (9/32) 7/8 2-1/4 5/16 4 25518 60.30 25518-C3 68.80
.2969 (19/64) 7/8 2-3/8 5/16 4 25519 60.30 25519-C3 68.80
.3125 (5/16) 1 2-1/2 5/16 4 25520 60.30 25520-C3 68.80
.3437 (11/32) 1 2-3/4 3/8 4 25522 72.70 25522-C3 84.20
.3750 (3/8) 1 3 3/8 4 25524 72.70 25524-C3 84.20
.4375 (7/16) 1 3 7/16 4 25528 84.60 25528-C3 95.10
.5000 (1/2) 1 3 1/2 4 25532 103.30 25532-C3 114.30
* Tolerance listed above refers to uncoated counterbores. Tolerance for AlTiN coating is +.0002"/−.0005".

Speeds & Feeds

Below you will find downloadable and printer-friendly Speeds & Feeds for this product line. All posted Speed & Feed parameters are suggested starting values that may be increased given optimal setup conditions. If you can't find the information you're looking for, Harvey Tool has a team of technical experts available to assist you. Please contact us at 800-645-5609 or tech@harveytool.com.

Counterbores

Counterbores - Flat Bottom Long Reach

 

Why use a COUNTERBORE vs. an END MILL? 

  • Flat Bottom: Avoids traditional dish left by end mill. Spots effectively on irregular surfaces; Avoids walking as is common with spot drills or drills. 
  • Full Cylindrical Margin & Back Taper: Not side cutting. Will not grab and deflect like an endmill, holding its position better. Reduces chatter and machining marks, improving finish.
  • Slow Helix with Low Rake: Avoids part engagement helping to control finish.

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Machinists' Feedback

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Rating StarRating StarRating StarRating StarRating Star   Flat Bottom (No Dish) Design Allows Spot Facing or Counterboring on Irregular Surfaces

By Clint W. New Freedom, PA, United States, August 30, 2012

Great line of mills. Almost nobody sells standard flat bottom mills anymore. Wish they were coated.

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