What is the purpose of the pilot on a counterbore?
Sets of Counterbores with Built-In Pilots The pilot keeps the counterbore centered in the hole to ensure a level seat.
What is a counterbore hole?
A counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. Whereas a counterbore is a flat-bottomed enlargement of a smaller coaxial hole, a countersink is a conical enlargement of such.
What are the main types of counterbore?
These configurations include aircraft counterbores, cap screw counterbores, fillister head screw counterbores, blade counterbores, and back counterbores.
How do you drill a counterbore?
To counterbore a hole, it’s easiest to drill the larger-diameter hole first, then drill the deeper hole for the fastener’s shaft. You should use a spade bit-or, better-a Forstner bit, which will create a flat-bottomed hole. It’s hard to say where the term counterbore came from.
How do I call counterbore?
The counterbore symbol will often be used together with the diameter symbol and the depth symbol. Older blueprints may specify a counterbore with the notation CBORE instead of the counterbore symbol. If you want to type the ⌴ symbol, hold the ALT key and press 9012.
Are the counterbores included in the price of the pilots?
Please note that Pilots for these Counterbores are NOT included. Price for 64th sizes is 30% over the next larger size – Call to order or request the counterbore in the ‘comments’ section of your checkout page. Taper Shank Counterbore Tools with holes for Interchangeable Pilots.
How do you use a counterbore set?
This counterbore has a set screw that lets you adjust the blades to counterbore multiple diameters with the same tool. Use these counterbore sets when the screw holes in sheets or layers of material are misaligned. Change out the pilot to use the same tool to counterbore multiple diameters.
What are C2 counterbores used for?
Designed for counterboring screw holes in misaligned sheets or layers of material. C2 carbide -tipped alloy steel has excellent performance on abrasive materials such as cast iron and nonferrous metals. Use these counterbores with screw holes in misaligned sheets or layers of material.
How do you counterbore multiple diameters with the same tool?
Counterbore multiple diameters with the same tool— use the set screw to adjust the blades to the diameter you need. This counterbore has a set screw that lets you adjust the blades to counterbore multiple diameters with the same tool. Use these counterbore sets when the screw holes in sheets or layers of material are misaligned.