Stop Countersinks

Stop countersinks are piloted countersink cutters used by machinists and metalworking professionals to form controlled countersinks in drilled holes. Designed for compatible micro-stop countersink systems, these cutters support repeatable hole-finishing work where the required countersink angle, cutter diameter, and pilot-hole size must match the application.

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Helpful Buying Guide

Stop Countersink Buying Guide

Select a stop countersink cutter by matching its countersink angle, cutter diameter, and pilot-hole configuration to the work and compatible micro-stop countersink setup. The available cutters include 82° and 90° profiles, diameters from 3/8 in. through 3/4 in., and several fractional and numbered pilot-hole options.

Visual Guide

Popular examples in this category

90 Degree Stop Countersink Cutter, 3/4 in Diameter, 3/8 in Pilot Hole90 Degree Stop Countersink Cutter, 3/4 in Diameter, 3/8 in Pilot HoleWBB164622890° Stop Countersink Cutter, 3/8 in. Diameter, 1/8 in. Pilot Hole90° Stop Countersink Cutter, 3/8 in. Diameter, 1/8 in. Pilot HoleWBB164623882 Degree Stop Countersink Cutter, 1/2 in. Diameter, 5/32 in. Pilot Hole82 Degree Stop Countersink Cutter, 1/2 in. Diameter, 5/32 in. Pilot HoleWBB164640282° Stop Countersink Cutter, 1/2 in. Diameter, 3/16 in. Pilot Hole82° Stop Countersink Cutter, 1/2 in. Diameter, 3/16 in. Pilot HoleWBB1646404
Use Cases

Controlled hole-finishing work

These cutters are intended for machining and metalworking professionals who need to create controlled countersinks in drilled holes using compatible micro-stop countersink systems.

How to Choose

Match the critical dimensions

Start with the countersink angle required for the job, then compare cutter diameter and pilot-hole size. Confirm that the cutter is designed for the compatible micro-stop setup being used.

Applications

Piloted countersinking

Piloted configurations help guide or position the cutter in the applicable hole while the cutting profile forms an 82° or 90° countersink.

Additional Info

Options across common sizes

Listed options span 3/8 in., 7/16 in., 1/2 in., 5/8 in., and 3/4 in. cutter diameters, with fractional pilots plus #21 and No. 30 pilot-hole configurations.

2Countersink angles

Available profiles are 82° and 90°.

5Cutter diameters

Listed diameters run from 3/8 in. through 3/4 in.

8Pilot configurations

Fractional, #21, and No. 30 pilot-hole options are represented.

1Minimum order on listed options

Several options can be ordered starting with one unit.

Comparison Guide

Compare Stop Countersink Options

Use the angle, cutter diameter, and pilot-hole configuration to narrow the choices for compatible countersinking work.

Countersink profileRepresented cutter diametersRepresented pilot-hole configurations
82°1/2 in.; 5/8 in.5/32 in.; 3/16 in.; 1/4 in.; No. 30
90°3/8 in.; 7/16 in.; 1/2 in.; 5/8 in.; 3/4 in.3/32 in.; 1/8 in.; 3/16 in.; 1/4 in.; 3/8 in.; #21
Chatter-resistant 82°1/2 in.No. 30
Planning Guide

Plan the right fit before choosing

1. Choose the countersink profile

Match the angle specified for the work

The represented stop countersink cutters are available with either an 82° or 90° cutting angle. Choose the profile that corresponds to the countersinking requirement.

  • 82° options include 1/2 in. and 5/8 in. cutter diameters.
  • 90° options range from 3/8 in. to 3/4 in. cutter diameters.
  • One 82° option is identified as chatter-resistant.
2. Match cutter and pilot sizes

Compare diameter and pilot-hole configuration together

Cutter diameter identifies the listed cutting size, while the pilot-hole configuration helps match the cutter to the applicable hole and compatible setup components.

  • Cutter diameters listed: 3/8 in., 7/16 in., 1/2 in., 5/8 in., and 3/4 in.
  • Fractional pilot sizes listed: 3/32 in., 1/8 in., 5/32 in., 3/16 in., 1/4 in., and 3/8 in.
  • Numbered pilot-hole options include #21 and No. 30.
3. Confirm system compatibility

Plan for a compatible micro-stop countersink system

Many of the listed cutters are designed for use with compatible micro-stop countersink systems. Review the cutter’s stated pilot-hole size and system compatibility before selecting it for controlled countersinking work.

  • Pilots help guide the cutter in compatible holes.
  • Compatible micro-stop setups support controlled countersinking operations.
  • Several represented options have a minimum order quantity of one.
FAQ

Common questions before buying

What countersink angles are available?

The represented cutters use either an 82° or 90° countersink angle.

What cutter diameters are represented?

Listed cutter diameters are 3/8 in., 7/16 in., 1/2 in., 5/8 in., and 3/4 in.

How do I select a pilot-hole size?

Match the listed pilot-hole configuration to the applicable hole and compatible setup components.

Are these cutters designed for micro-stop systems?

Many listed options are designed for use with compatible micro-stop countersink systems.

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