Helical Solutions Micro 100
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Counterbores - Flat Bottom

Photo is an illustration of an exemplary tool

Carbide Counterbores - Flat Bottom
 

  • For spot facing or counterboring on irregular surfaces
  • 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 cylindrical margin (not side cutting)
  • 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
  • Uncoated
CUTTER
DIAMETER
FLUTE
LENGTH
SHANK
DIAMETER
OVERALL
LENGTH
UNCOATED AlTiN COATED
D1 +.0000"/-.0005"* L2 +.030"/-.000" D2 L1 4 FL PRICE 4 FL PRICE
.0312 (1/32) 1/8 1/8 1-1/2 23331 28.80 23331-C3 33.20
.0394 (1 mm) 5/32 1/8 1-1/2 2331M 28.80 2331M-C3 33.20
.0469 (3/64) 3/16 1/8 1-1/2 23347 28.80 23347-C3 33.20
.0625 (1/16) 1/4 1/8 1-1/2 23362 28.80 23362-C3 33.20
.0781 (5/64) 5/16 1/8 1-1/2 23378 28.80 23378-C3 33.20
.0787 (2 mm) 5/16 1/8 1-1/2 2332M 28.80 2332M-C3 33.20
.0937 (3/32) 3/8 1/8 1-1/2 23393 28.80 23393-C3 33.20
.1094 (7/64) 3/8 1/8 1-1/2 23407 28.80 23407-C3 33.20
.1181 (3 mm) 3/8 1/8 1-1/2 2343M 28.80 2343M-C3 33.20
.1250 (1/8) 1/2 1/8 1-1/2 23408 28.80 23408-C3 33.20
.1406 (9/64) 9/16 3/16 2 23409 27.60 23409-C3 32.40
.1562 (5/32) 5/8 3/16 2 23410 27.60 23410-C3 32.40
.1575 (4 mm) 5/8 3/16 2 2344M 27.60 2344M-C3 32.40
.1719 (11/64) 5/8 3/16 2 23411 27.60 23411-C3 32.40
.1875 (3/16) 3/4 3/16 2 23412 27.60 23412-C3 32.40
.1968 (5 mm) 3/4 1/4 2-1/2 2345M 37.60 2345M-C3 44.20
.2031 (13/64) 3/4 1/4 2-1/2 23413 37.60 23413-C3 44.20
.2187 (7/32) 3/4 1/4 2-1/2 23414 37.60 23414-C3 44.20
.2344 (15/64) 7/8 1/4 2-1/2 23415 37.60 23415-C3 44.20
.2362 (6 mm) 7/8 1/4 2-1/2 2346M 37.60 2346M-C3 44.20
.2500 (1/4) 7/8 1/4 2-1/2 23416 37.60 23416-C3 44.20
.2656 (17/64) 7/8 5/16 2-1/2 23417 46.50 23417-C3 54.10
.2812 (9/32) 7/8 5/16 2-1/2 23418 46.50 23418-C3 54.10
.2969 (19/64) 7/8 5/16 2-1/2 23419 46.50 23419-C3 54.10
.3125 (5/16) 1 5/16 2-1/2 23420 46.50 23420-C3 54.10
.3150 (8 mm) 1 3/8 2-1/2 2348M 55.50 2348M-C3 64.20
.3281 (21/64) 1 3/8 2-1/2 23421 55.50 23421-C3 64.20
.3437 (11/32) 1 3/8 2-1/2 23422 55.50 23422-C3 64.20
.3594 (23/64) 1 3/8 2-1/2 23423 55.50 23423-C3 64.20
.3750 (3/8) 1 3/8 2-1/2 23424 55.50 23424-C3 64.20
.3937 (10 mm) 1 7/16 2-3/4 2340M 68.40 2340M-C3 79.20
.4375 (7/16) 1 7/16 2-3/4 23428 68.40 23428-C3 79.20
.5000 (1/2) 1 1/2 3 23432 89.90 23432-C3 102.80
.5625 (9/16) 1-1/2 5/8 3-1/2 23436 127.60 23436-C3 140.50
.6250 (5/8) 1-1/2 5/8 3-1/2 23440 142.90 23440-C3 155.80
.6875 (11/16) 1-1/2 3/4 4 23444 206.90 23444-C3 220.90
.7500 (3/4) 1-1/2 3/4 4 23448 206.90 23448-C3 220.90
* Tolerance listed above refers to uncoated couterbores. Tolerance for AlTiN coated counterbores 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

 

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.
Harvey Tool offers a wide assortment of specialty End Mills in a variety of sizes and lengths of cut. You may find our Advanced Search feature helpful to locate the best stock tool for your application. The Advanced Search allows you to select your critical dimensions to narrow your search. However, if you are looking for a tool that we don’t offer as a standard, we can provide you with a special custom tool. Simply fill out the Request for Quote (RFQ) Template that best represents the tool you need, and submit via email or fax. One of our technical experts will get back to you. If you need help designing your special tool, you can contact our Quotations Department.

Phone - 978-948-8555 ext. 6004 - Ask for our Quotations Department.
RFQ Fax - 978-948-8560
Email - tech@harveytool.com.


Special RFQ - Long Reach Counterbore

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