A Harvey Performance Company

Counterbores - Flat Bottom

Holemaking & Threading
Counterbores - Flat Bottom

Holemaking & Threading

The flat bottom design featured in this Harvey Tool product offering of Counterbores - Flat Bottom allows for spot facing or counterboring on irregular surfaces. This tool is ideal for castings, rounded, concaved or drafted part surfaces.

  • 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
  • AlTiN coating for increased performance in ferrous materials
  • AlTiN Nano coating for superior performance in ferrous and difficult to machine materials
  • CNC ground in the USA   

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* Tolerance listed above refers to uncoated couterbores. Tolerance for AlTiN coated counterbores is +.0002"/-.0005"
CUTTER
DIAMETER
FLUTE
LENGTH
SHANK
DIAMETER
OVERALL
LENGTH
UNCOATED AlTiN COATED AlTiN NANO COATED Add to Cart Default Sort
D1
+.0000"-.0005"*
L2
+.030"-.000"
D2 L1 4 FL PRICE 4 FL PRICE 4 FL PRICE
.0200 .060 1/8 1-1/2 23320 $29.60 23320-C3 $34.20 00000001
.0300 1/8 1/8 1-1/2 23330 $29.60 23330-C3 $34.20 00000002
.0312 (1/32) 1/8 1/8 1-1/2 23331 $29.60 23331-C3 $34.20 00000003
.0394 (1 mm) 5/32 1/8 1-1/2 2331M $29.60 2331M-C3 $34.20 00000004
.0400 5/32 1/8 1-1/2 23340 $29.60 23340-C3 $34.20 00000005
.0469 (3/64) 3/16 1/8 1-1/2 23347 $29.60 23347-C3 $34.20 00000006
.0500 3/16 1/8 1-1/2 23350 $29.60 23350-C3 $34.20 00000007
.0550 1/4 1/8 1-1/2 23355 $29.60 23355-C3 $34.60 00000008
.0600 1/4 1/8 1-1/2 23360 $29.60 23360-C3 $34.20 00000009
.0625 (1/16) 1/4 1/8 1-1/2 23362 $29.60 23362-C3 $34.20 23362-C6 $36.40 00000010
.0700 9/32 1/8 1-1/2 23370 $29.60 23370-C3 $34.60 00000011
.0781 (5/64) 5/16 1/8 1-1/2 23378 $29.60 23378-C3 $34.20 00000012
.0787 (2 mm) 5/16 1/8 1-1/2 2332M $29.60 2332M-C3 $34.20 00000013
.0800 5/16 1/8 1-1/2 23380 $29.60 23380-C3 $34.20 00000014
.0900 3/8 1/8 1-1/2 23390 $29.60 23390-C3 $36.40 00000015
.0937 (3/32) 3/8 1/8 1-1/2 23393 $29.60 23393-C3 $34.20 23393-C6 $36.40 00000016
.1094 (7/64) 3/8 1/8 1-1/2 23407 $29.60 23407-C3 $34.20 00000017
.1181 (3 mm) 3/8 1/8 1-1/2 2343M $29.60 2343M-C3 $34.20 2343M-C6 $36.40 00000018
.1250 (1/8) 1/2 1/8 1-1/2 23408 $29.60 23408-C3 $34.20 23408-C6 $36.40 00000019
.1406 (9/64) 9/16 3/16 2 23409 $28.40 23409-C3 $33.40 00000020
.1562 (5/32) 5/8 3/16 2 23410 $28.40 23410-C3 $33.40 00000021
.1575 (4 mm) 5/8 3/16 2 2344M $28.40 2344M-C3 $33.40 00000022
.1719 (11/64) 5/8 3/16 2 23411 $28.40 23411-C3 $33.40 00000023
.1875 (3/16) 3/4 3/16 2 23412 $28.40 23412-C3 $33.40 23412-C6 $35.70 00000024
.1968 (5 mm) 3/4 1/4 2-1/2 2345M $38.70 2345M-C3 $45.50 00000025
.2031 (13/64) 3/4 1/4 2-1/2 23413 $38.70 23413-C3 $45.50 00000026
.2187 (7/32) 3/4 1/4 2-1/2 23414 $38.70 23414-C3 $45.50 00000027
.2344 (15/64) 7/8 1/4 2-1/2 23415 $38.70 23415-C3 $45.50 00000028
.2362 (6 mm) 7/8 1/4 2-1/2 2346M $38.70 2346M-C3 $45.50 2346M-C6 $48.70 00000029
.2500 (1/4) 7/8 1/4 2-1/2 23416 $38.70 23416-C3 $45.50 23416-C6 $48.70 00000030
.2656 (17/64) 7/8 5/16 2-1/2 23417 $47.80 23417-C3 $55.70 00000031
.2812 (9/32) 7/8 5/16 2-1/2 23418 $47.80 23418-C3 $55.70 00000032
.2969 (19/64) 7/8 5/16 2-1/2 23419 $47.80 23419-C3 $55.70 00000033
.3125 (5/16) 1 5/16 2-1/2 23420 $47.80 23420-C3 $55.70 00000034
.3150 (8 mm) 1 3/8 2-1/2 2348M $57.10 2348M-C3 $66.10 00000035
.3281 (21/64) 1 3/8 2-1/2 23421 $57.10 23421-C3 $66.10 00000036
.3437 (11/32) 1 3/8 2-1/2 23422 $57.10 23422-C3 $66.10 00000037
.3594 (23/64) 1 3/8 2-1/2 23423 $57.10 23423-C3 $66.10 00000038
.3750 (3/8) 1 3/8 2-1/2 23424 $57.10 23424-C3 $66.10 23424-C6 $68.30 00000039
.3937 (10 mm) 1 7/16 2-3/4 2340M $70.40 2340M-C3 $81.60 00000040
.4062 (13/32) 1 7/16 2-3/4 23426 $70.40 23426-C3 $81.60 00000041
.4375 (7/16) 1 7/16 2-3/4 23428 $70.40 23428-C3 $81.60 00000042
.4687 (15/32) 1 1/2 3 23430 $92.50 23430-C3 $105.90 00000043
.4724 (12 mm) 1 1/2 3 23476 $92.50 23476-C3 $105.90 00000044
.5000 (1/2) 1 1/2 3 23432 $92.50 23432-C3 $105.90 00000045
.5625 (9/16) 1-1/2 5/8 3-1/2 23436 $131.40 23436-C3 $144.80 00000046
.6250 (5/8) 1-1/2 5/8 3-1/2 23440 $147.10 23440-C3 $160.50 00000047
.6875 (11/16) 1-1/2 3/4 4 23444 $213.10 23444-C3 $227.60 00000048
.7500 (3/4) 1-1/2 3/4 4 23448 $213.10 23448-C3 $227.60 00000049

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