Ask Irwin

I plan on using my hole saw to cut into iron. What RPM should I use for best results?

Trying to cut metal too fast will overheat the material being cut, which 'heat-hardens' the work and causes the cutting blade to work harder and wear out more quickly. To answer your question we would need to know what size hole saw you are using. Every hole size requires a different RPM for different types of materials. IRWIN always details the optimum drill RPM on each hole saw package. Before you use your hole saw to cut iron, please refer to the manufacturer recommended RPM for the appropriate hole size.

Ask Irwin a QuestionClick a question below to view the answer.

Chisels

Circular Saw Blades

Drill Bits

Extractors

Fastener Drives

Hand Saws

Hole Saws

Levels

Marking Chalk

Pliers and Adjustable Wrenches

Snips

Tape Measures

Taps, Dies, & Sets

Utility Knives & Blades

Laser Guide

Door Lock Installation Kit

STRAIT-LINE LL 120

STRAIT-LINE Rolling Tape

STRAITLINE® Sonic Laser Tape 50

STRAITLINE Stud Finder 150 LCD (Wall Scanner)

STRAIT-LINE Intersect w/Stud Finder

STRAITLINE Intersect

STRAITLINE X3

IRWIN Lettered and Numbered Drill Bits

IRWIN Permanent Staining Chalk