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What size is an R drill bit?

Asked by Ernestine Milliken on November 20, 2021

Categories: Hobbies and interests Woodworking


Rating: 4.7/5 (55 votes)

Drill Bit Size Chart

Size Decimal Equivalent Size
.35 mm 0.0138 8.60 mm
.36 mm 0.0142 R
79 0.0145 8.70 mm
.38 mm0.015 11/32"

Which is a better drill bit cobalt or titanium? The type of titanium coating makes a difference though. For example, titanium carbonitride coating can typically handle tougher materials than titanium nitride coating. Cobalt drill bits are best for the toughest materials, like cast iron and other metals that are particularly abrasive.

What does a metal drill bit look like? Bits designed to drill metal have flutes that taper to a point at either a 118- or 135-degree angle. Bits with a 118-degree point are general-purpose bits, while those with a 135-degree point are self-cleaning, which means they shed shards of metal instead of allowing them to accumulate around the shank.

What's the difference between wood and metal drill bits? Difference Between Metal & Wood Drill BitsThe wood drill requires less force (and therefore, less pressure) to drill since it's used on a relatively softer medium. Metal drill bits require more energy because, well, you're drilling through metal withthem.

What size is a #30 drill bit? Drill sizes to 1" diameter

Drill sizes to1" diameter Legend Fractional Inch Letter Drill Millimeters Number Drill
Millimeters Inches Designation
3.048mm .12" #31
3.175mm .125" 1/8"
3.2639mm .1285" #30