Search results
7 paź 2022 · A ‘pilot hole’ is a small diameter hole, usually the first hole to be drilled. The counterbore example above was for an M20 socket-head bolt with normal clearance. You can find out what size counterbore you need by looking at a chart such as this one. What Are Counterbored Holes Used For? Counterbores are machined for socket-head screws.
- Blog
The Engineer's Bible is a blog focusing on teaching...
- Metric
Download the Metric Clearance Hole Chart to save the chart...
- Newsletter
Engineering Tools Delivered Straight To Your Inbox. Get...
- Types of Welds
This is the complete guide to the types of welds used in...
- Imperial
For example, an 3/8″ bolt with a close fit would have a W...
- Mechanical Engineer Roadmap
Use the chart below as a guide for some of the skills...
- Engineering Tools
Larger variants are also available, ones that are big enough...
- About
The Engineer's Bible is a site dedicated to improving the...
- Blog
A counterbore is a cylindrical hole, with a flat bottom that is larger than and coaxial to another cylindrical hole below it. The counterbore serves to provide a recessed and flat surface for mating parts, and typically, socket head cap screws are used with counterbores.
30 gru 2023 · A counterbore creates a cylindrical flat-bottomed hole, enlarging an existing hole to accommodate a fastener head. This process ensures that the head of a bolt or screw sits flush with the surface of the material, providing a larger surface area for the fastener and a cleaner finish.
9 sie 2022 · A counterbore is a flat-bottomed cylindrical hole that is larger than and coaxial to another cylindrical hole. It is used to provide a flat and recessed mounting surface for mating parts. The hardware most commonly used with a counterbore is a socket head cap screw.
21 maj 2024 · A counterbore hole is a flat, cylindrical recess machined coaxially around an existing screw or fastener hole. The primary purpose of a counterbore is to provide a convenient, non-intrusive space for the fastener’s head. This recess is deep enough to allow the fastener head to sit flush with or below the surface of the workpiece.
In machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. A counterbore hole is typically used when a fastener, such as a socket head cap screw or fillister head screw, is required to sit flush with or below the level of a workpiece's surface.
20 paź 2023 · Counterboring is a machining process that creates a flat-bottomed hole that enlarges a pre-existing hole. This method is especially useful in CNC machining when you need to prepare a hole to fit a bolt head or any other fastener so it sits flush with or below the surface of your material.
