Circular Saw Blade Tip Speed

Recently, I did some web research about the typically accepted range for router bit tip speeds so I could construct my own table for safe operating ranges of router bits of various sizes in a variable speed router. I found the speed range was between 100 and 150km/hr.

That has lead to another question that I’ve been asked: what is the normal tip speed of a circular saw, and do manufacturers make their small saws run faster to obtain a similar tip speed on their 7 1/4″ (185mm) model(s) versus their 9 1/4″ (235mm) model(s)?

This is comparing no-load speeds (Note, where there wasn’t a 235mm model, I’ve taken the next size down)

So just had a quick look, at 5 different company’s products, and calculated tip speed in each case and this is what I got:

Triton 235mm 4100RPM 181 km/hr 2400W

Triton 185mm 5000RPM 174 km/hr 2000W

Makita 235mm 4100RPM 181 km/hr 2000W

Makita 185mm 4700RPM 164 km/hr 1050W

GMC 235mm 4500RPM 199 km/hr 2300W

GMC 185mm 4700RPM 164 km/hr 1800W

GMC 185mm 5000RPM 174 km/hr 1200W

Dewalt 185mm 5800RPM 202 km/hr 2200W

Dewalt 210mm 5800RPM 230 km/hr 2075W

Hitachi 235mm 5000RPM 221 km/hr 2000W

Hitachi 185mm 5800RPM 202 km/hr 1710W

Gives one a real appreciation how fast a kickback from one of these things is……..

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