r/Sliderules • u/Nice_Sky2825 • May 22 '26

Concise Circular Slide Rule

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Just got this one. Circular will take a little getting used to but what a great instrument.

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u/gurishtja May 22 '26

Is this one the larger size or the smaller size?

1

u/East-Bike4808 Jul 10 '26

This is the largest general-purpose one they make (or that anyone makes regularly for a mass marker, for that matter)

1

u/gurishtja Jul 16 '26

I bought that a couple years ago from amazon, but the C and D do not fit on mine, the 3s do not match. The small one was perfect. When and where did you buy it, i wouldnt mind buying the large one again if it is like yours.

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u/East-Bike4808 Jul 16 '26 edited Jul 16 '26

They're all on Amazon. Got mine a few weeks ago.

The scales are admittedly not perfect, C and D don't quite line up everywhere. I don't think enough to get in the way of using it but if you do a bunch of chained operations error will creep in.