Adjustable Counterbores

Adjustable Counterbores allow you to drill cylidrical flat-bottomed holes while adjusting the depth of cut of the center drill. Choose from a great selection of Adjustable counterbore drills in carbide tipped or high speed steel. If you don't see the size of the Adjustable counterbore you need, give us a call at 800-346-8274. We may have other options other than what is available online.

Carbide Tipped Adjustable Counter bore with shank size same as center drill

*Center drills are sold separately

Counterbore Diameter	Center Drill Hole Diameter	Overall Length	Part #
1-3/8"	7/16"	2"	HS123CT-138716

High Speed Steel Adjustable Counter bore with shank size same as center drill

*Center drills are sold seperately

Counterbore Diameter	Center Drill Hole Diameter	Overall Length	Part #
3/8"	3/16"	1 1/2"	HS123-62301
1/2"	1/4"	1 1/2"	HS123-62304
3/4"	1/4"	2"	HS123-62307
3/4"	5/16"	2"	HS123-62308
7/8"	5/16"	2"	HS123-62309
7/8"	3/8"	2"	HS123-62310
7/8"	7/16"	2"	HS123-62311
1"	5/16"	2"	HS123-62312
1"	3/8"	2"	HS123-62313
1"	7/16"	2"	HS123-62313-716
1"	1/2"	2"	HS123-62314
1-1/4"	1/2"	2"	HS123-62316
1-1/2"	1/2"	2"	HS123-62318

High Speed Steel Adjustable Counterbore, 1/2" Shank

Counterbore Diameter	Inside Diameter	Twist length	Overall Length	Part #
3/8"	1/8"	2-1/2"	4-1/2"	HS122-62261
3/8"	5/32"	2-1/2"	4-1/2"	HS122-62262
3/8"	3/16"	2-1/2"	4-1/2"	HS122-62263
1/2"	3/16"	2-1/2"	4-1/2"	HS122-62268
1/2"	7/32"	2-1/2"	4-1/2"	HS122-62269
1/2"	1/4"	2-1/2"	4-1/2"	HS122-62270
5/8"	3/16"	2-1/2"	4-1/2"	HS122-62273
5/8"	5/16"	2-1/2"	4-1/2"	HS122-62276
3/4"	3/16"	2-1/2"	4-1/2"	HS122-62277
3/4"	5/16"	2-1/2"	4-1/2"	HS122-62280
3/4"	3/8"	2-1/2"	4-1/2"	HS122-62281

Carbide Processors
CounterBore, 3/8 OD, 3/16 ID, 5" Cut Length, 7" OAL, HS-3165212
Counterbore, 3/8 Cutting Diameter, 3/16 Center Drill Diameter,5 Cut Length, 7 Overall Length. M2 HSS…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $79.10

Was:

Now: $65.91
Carbide Processors
Adjustable CounterBore, HSS 3/4" Dia, 1/4" Center Drill, 1/2" Shank, Carbide Processors HS122-62278
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62278;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $75.42

Was:

Now: $62.85
Carbide Processors
Clamp-On Adjustable CounterBore, Carbide Tipped 1 OD, 3/8 ID, Carbide Processors HS123CT-62313
Carbide Tipped Adjustable Counterbore, Counterboring Flat Bottom Holes- 1 Cutting Diameter, 3/8 Cent…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $120.40

Was:

Now: $97.65
Carbide Processors
Adjustable CounterBore, HSS 5/8" Dia, 9/32" Center Drill, 1/2" Shank, Carbide Processors HS122-62275
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62275;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $75.50

Was:

Now: $62.91
Carbide Processors
Adjustable Counterbore Drill, 1/2 Dia, 3/16 Center Drill, HS121-62250
Adjustable Counter Bore - M2 HSS, Threaded Shank, HS121-62250 Outside Diameter: 1/2" Inside Diameter…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $57.04

Was:

Now: $47.53
Carbide Processors
Adjustable CounterBore, HSS 7/16" Dia, 3/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62264
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62264;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $48.82

Was:

Now: $40.68
Carbide Processors
Adjustable CounterBore, HSS 7/16" Dia, 7/32" Center Drill, 1/2" Shank, Carbide Processors HS122-62265
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62265;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Clamp-On Adjustable CounterBore, Carbide Tipped 1-3/8 OD, 7/16 ID, Carbide Processors HS123CT-138716
Carbide Tipped Adjustable Counterbore, Counterboring Flat Bottom Holes- 1 3/8 Cutting Diameter,…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $131.20

Was:

Now: $109.33
Carbide Processors
Adjustable CounterBore, HSS 3/4" Dia, 3/8" Center Drill, 1/2" Shank, Carbide Processors HS122-62281
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62281;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $83.75

Was:

Now: $60.96
Carbide Processors
Adjustable CounterBore, HSS 3/4" Dia, 5/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62280
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62280;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $83.75

Was:

Now: $60.96
Carbide Processors
Adjustable CounterBore, HSS 3/4" Dia, 3/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62277
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62277;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $83.75

Was:

Now: $60.96
Carbide Processors
Adjustable CounterBore, HSS 5/8" Dia, 5/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62276
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62276;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $82.50

Was:

Now: $68.75
Carbide Processors
Adjustable CounterBore, HSS 5/8" Dia, 3/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62273
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62273;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $76.75

Was:

Now: $55.88
Carbide Processors
Adjustable CounterBore, HSS 1/2" Dia, 1/4" Center Drill, 1/2" Shank, Carbide Processors HS122-62270
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62270;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Adjustable CounterBore, HSS 1/2" Dia, 7/32" Center Drill, 1/2" Shank, Carbide Processors HS122-62269
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62269;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Adjustable CounterBore, HSS 1/2" Dia, 3/16" Center Drill, 1/2" Shank, Carbide Processors HS122-62268
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62268;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Adjustable CounterBore, HSS 3/8" Dia, 5/32" Center Drill, 1/2" Shank, Carbide Processors HS122-62262
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62262;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $48.24

Was:

Now: $35.11
Carbide Processors
Adjustable CounterBore, HSS 3/8" Dia, 1/8" Center Drill, 1/2" Shank, Carbide Processors HS122-62261
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62261;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Adjustable CounterBore, HSS 3/8 Dia, 3/16 Center Drill, 1/2 Shank, Carbide Processors HS122-62263
HSS Adjustable CounterBore for Counterboring Flat Bottom Holes- Carbide Processors HS122-62263;…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $51.13

Was:

Now: $37.21
Carbide Processors
Clamp-On Adjustable CounterBore, 1-1/2 OD, 1/2 ID, Carbide Processors HS123-62318
Adjustable Counterbore, Counterboring Flat Bottom Holes- 1 1/2 Cutting Diameter, 1/2 Center Drill Di…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $116.36

Was:

Now: $84.70