# What number is a 1/8 drill bit?

A 1/8 drill bit corresponds to a diameter of 0.125 Inches (3.175mm). It is commonly used with materials such as plastic, wood and aluminum. When working with harder materials such as steel, a more powerful drill will be required and a cobalt or titanium bit should be used for the best results.

When using a drill bit on metal it is important to use cutting oil or lubricant to help with the cutting process. This will help to reduce heat, wear and tear on the bit as well as improve the overall quality of the cut.

## What is the final drill size of 1 8?

The final drill size of 1 8 is 0.1285 inches (3.26mm). This is an imperial-standard fractional size, which explains the fractional notation of 1 8. The size is derived from a measurement in fractional inches.

In this case, 1/8 inch equals 0.1285 inches (3.26mm).

## What size is a 8.5 mm drill bit in standard?

An 8.5 mm drill bit is approximately equal to 11/32 inch in standard size. This means that a drill bit with an 8.5 mm diameter is 11/32 of an inch in diameter. Generally, the size of drill bits will be expressed either in millimeters or in inches, so 8.

5 mm would be the metric size, while 11/32 would be the imperial size.

## Is 5/16 drill bit the same as 8mm?

No, a 5/16 drill bit is not the same as an 8mm drill bit. The 5/16 drill bit is a fractional inch size, while the 8mm drill bit is a metric size. The diameters of the two drill bits are not the same – the 5/16 drill bit measures 0.

3125 inches in diameter and the 8mm drill bit measures 0.3150 inches in diameter. The difference in size is enough to make the two drill bit types incompatible. For an 8mm hole, you should use an 8mm drill bit.

## What size drill bit do I need to drill an 8 mm hole?

The size drill bit you need to drill an 8mm hole will depend on what material you are drilling into. For most general purpose drilling into wood, the 8mm drill bit would be a 5/16-inch drill bit. However, if you’re drilling into metal, then you will want to use a 29/64-inch or a 7/16-inch drill bit.

It is recommended to use drill bits made of high-speed steel (HSS) or cobalt to extend the life of your drill bit and to achieve the cleanest hole possible. If you’re uncertain of what drill bit size to use, it’s a good idea to test it beforehand on a scrap piece of material.

## What size hole do you drill for a M8 bolt?

When drilling a hole to fit a M8 bolt, a 8mm or 5/16-inch hole should be drilled. Depending on the type of material being drilled and the depth desired, the correct drill bit should be selected. For hardwoods, a brad-point bit is recommended, while a high-speed steel bit is suitable for drilling metal.

If a normal twist drill is to be used, the pilot hole should be no more than 3/4 of the thickness of the material being drilled. Deeper holes should start with a small-diameter pilot bit, then proceed to the drill size of choice.

When setting in a countersink, it is important to take into account the size of the head of the bolt and the overall length. A countersink for flush-head bolts should have a diameter equal to the head of the bolt, allowing for a complete flush surface when installed.

## Is a 3/8 drill bit 10mm?

No, a 3/8 drill bit is not 10mm. The size of a drill bit is typically measured in two ways, the fractional size and the metric size. A 3/8 drill bit is fractional size, which is equivalent to 9.525mm in the metric system.

10mm is a slightly larger size, making a 3/8 drill bit too small for the desired application.

## What size drill is 6mm?

A 6mm drill is considered a small drill and is primarily used for precision drilling. It is most commonly found in a drill bit set that ranges in size up to 13mm (1/2″) and can be used for a variety of materials such as wood, plastic, aluminum, brass, and steel.

Such precision drills can often be purchased in speciality hardware stores or online. They can also be used with a variety of styles and speeds of drills, depending on the material being worked on, including variable speed drills, cordless drills, and even hammer drills.

## What size bit is 1/4 inch?

A 1/4 inch bit is a quarter-inch bit. This size bit is commonly used for a variety of tasks, such as drilling pilot holes and/or creating countersinks or counter-bores. It is also used in many woodworking and metalworking operations.

When ordering a drill bit, the size is usually coded by a number, such as ‘6’ for a 1/4 inch bit. This number indicates the size of the bit in 1/64 inch increments. For a 1/4 inch bit, this would equal 6/64 inch, or 6.35mm.

## How much bigger should a hole be than a bolt?

It is generally recommended that a hole should be 1/64 inch bigger than the diameter of the bolt being used. This extra space allows for the appropriate insertion and tightening of the bolt without any issues.

It also ensures that the bolt is able to move freely within the hole. Additionally, it prevents the bolt from over-tightening and potentially causing damage to the material surrounding the hole or the bolt itself.

Furthermore, this extra space also allows for the tightening of the bolt and the automatic of equal distribution of pressure around the bolt. In conclusion, it is important to adhere to the 1/64 inch rule when creating holes for bolts.

## How big should a clearance hole be?

The size of a clearance hole typically depends on the size and type of fastener being used. Generally, a clearance hole should be slightly larger than the major diameter of the fastener so the fastener can fit through the hole easily.

For metric fasteners, a clearance hole of 1.25-1.5 times the diameter of the fastener should be used. For inch fasteners, a clearance hole that is slightly bigger than the major outside diameter of the threads should be used.

As a general rule, a clearance hole for a metric fastener should be at least 0.4mm larger than the fastener diameter, and a clearance hole for an inch fastener should be at least 0.016 inches larger than the fastener diameter.