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COUNTER BORE BIT FREE

Normally, the diameter of countersink does not have to exceed F (max.).

The countersink or corner relief, however, should not be larger than is necessary to insure that the fillet on the screw is cleared. If such holes are not countersunk, the heads of screws may not seat properly or the sharp edges on holes may deform the fillets on screws thereby making them susceptible to fatigue in applications involving dynamic loading. It is considered good practice to countersink or break the edges of holes that are smaller than F (max.) in parts having a hardness which approaches, equals, or exceeds the screw hardness. Ensure the material is fixed and drill is stable while drilling.1. *WARNING!: For optimal results and extended tool life use lubricant or air cooling. The user-friendly design enables control of the drill length and its replacement, without the need to disassemble the depth-stop. Each cutting edge is manufactured from an Amana-exclusive carbide grade designed to deliver the highest quality of cut, maximum cutting efficiency prolonged tool life. The countersink also features an opening to allow for chip evacuation in materials including hardwood, plywood, decking material, solid surface, and softwoods. The resulting countersinks can be shallow to accommodate a screw only or deeper to allow for insertion of a plug. Users can adjust the depth of both the pilot hole and countersink so that the resulting opening is either flush with the surface or recessed. With Amana's non-marring adjustable depth stop and no-thrust ball bearing, woodworkers can drill a pilot hole and tapered countersink in one step to help guide screws during project assembly.

Quick release hex shank *item #55244 which is round shank.

Adjustable, heavy-duty, revolving depth-stop.

No burning, marring or scratching of surfaces.

Read review of carbide tipped countersinks. These tools combine Amana's well-known, long lasting carbide tipped countersinks with the unique, adjustable & heavy duty revolving depth-stoppers with a no-thrust ball bearing. This unique countersink features an adjustable, heavy-duty, revolving depth-stop with a no-thrust ball bearing for quick and easy adjustment of the countersink depth without scratching or burning surfaces. Includes drill (slow spiral, High-Speed Steel (HSS) M2 fully ground drill bit).

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COUNTER BORE BIT FREE

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