Counterbores - Flat Bottom

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

Jump to Product Reviews

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 26.70 23331-C3 30.90
.0394  (1 mm) 5/32 1/8 1-1/2 2331M 26.70 2331M-C3 30.90
.0469  (3/64) 3/16 1/8 1-1/2 23347 26.70 23347-C3 30.90
.0625  (1/16) 1/4 1/8 1-1/2 23362 26.70 23362-C3 30.90
.0781  (5/64) 5/16 1/8 1-1/2 23378 26.70 23378-C3 30.90
.0787  (2 mm) 5/16 1/8 1-1/2 2332M 26.70 2332M-C3 30.90
.0937  (3/32) 3/8 1/8 1-1/2 23393 26.70 23393-C3 30.90
.1094  (7/64) 3/8 1/8 1-1/2 23407 26.70 23407-C3 30.90
.1181  (3 mm) 3/8 1/8 1-1/2 2343M 26.70 2343M-C3 30.90
.1250  (1/8) 1/2 1/8 1-1/2 23408 26.70 23408-C3 30.90
.1406  (9/64) 9/16 3/16 2 23409 25.50 23409-C3 30.00
.1562  (5/32) 5/8 3/16 2 23410 25.50 23410-C3 30.00
.1575  (4 mm) 5/8 3/16 2 2344M 25.50 2344M-C3 30.00
.1719  (11/64) 5/8 3/16 2 23411 25.50 23411-C3 30.00
.1875  (3/16) 3/4 3/16 2 23412 25.50 23412-C3 30.00
.1968  (5 mm) 3/4 1/4 2-1/2 2345M 34.90 2345M-C3 41.10
.2031  (13/64) 3/4 1/4 2-1/2 23413 34.90 23413-C3 41.10
.2187  (7/32) 3/4 1/4 2-1/2 23414 34.90 23414-C3 41.10
.2344  (15/64) 7/8 1/4 2-1/2 23415 34.90 23415-C3 41.10
.2362  (6 mm) 7/8 1/4 2-1/2 2346M 34.90 2346M-C3 41.10
.2500  (1/4) 7/8 1/4 2-1/2 23416 34.90 23416-C3 41.10
.2656 (17/64) 7/8 5/16 2-1/2 23417 43.10 23417-C3 50.30
.2812 (9/32) 7/8 5/16 2-1/2 23418 43.10 23418-C3 50.30
.2969 (19/64) 7/8 5/16 2-1/2 23419 43.10 23419-C3 50.30
.3125  (5/16) 1 5/16 2-1/2 23420 43.10 23420-C3 50.30
.3150 (8 mm) 1 3/8 2-1/2 2348M 51.50 2348M-C3 59.70
.3281 (21/64) 1 3/8 2-1/2 23421 51.50 23421-C3 59.70
.3437 (11/32) 1 3/8 2-1/2 23422 51.50 23422-C3 59.70
.3594 (23/64) 1 3/8 2-1/2 23423 51.50 23423-C3 59.70
.3750  (3/8) 1 3/8 2-1/2 23424 51.50 23424-C3 59.70
.3937 (10 mm) 1 7/16 2-3/4 2340M 63.40 2340M-C3 73.60
.4375  (7/16) 1 7/16 2-3/4 23428 63.40 23428-C3 73.60
.5000  (1/2) 1 1/2 3 23432 83.40 23432-C3 95.60
.5625 (9/16) 1-1/2 5/8 3-1/2 23436 118.50 23436-C3 130.70
.6250 (5/8) 1-1/2 5/8 3-1/2 23440 132.50 23440-C3 144.70
.6875 (11/16) 1-1/2 3/4 4 23444 192.10 23444-C3 205.30
.7500 (3/4) 1-1/2 3/4 4 23448 192.10 23448-C3 205.30

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

Need To Place An Order? Find A Local Distributor

Machinists' Feedback

Used this tool? Share your experiences.

Create your own review

E-mail A Friend

Privacy Policy. All rights reserved. All Content Herein © 2017 Harvey Tool