Author: clarnibass
Date: 2020-10-13 15:30
>> my Selmer Signature with 64,5 and 62,5. <<
The local player I mentioned had me shorten a barrel because the shortest barrel Selmer had was longer than he wanted. There was certainly nothing close to 62.5mm. Maybe that has changed (either started ofering them, or stopped, depending on when any of this happened).
>> Btw: can somebody explain how inches can be 'more accurate' than millimeters? <<
Inches are not more accurate than millimeters. A regular (mechanic, non-dial) inch caliper is sometimes more accurate than a regular metric caliper, but only if it has a 0.001" vernier scale.
Most metric calipers measure to 0.1mm, but you can sort of see if the line on the vernier is closer to a line or in between two lines, so it's the closest 0.10mm, but you can rough estimate to the closest 0.05mm (maybe better, but it's irrelevant anyway).
Inch calipers with a 0.001" vernier scale can measure to the closest 0.001" (equivalent to 0.0254mm), with an actual line matching, but it can be pretty tricky to be sure which of two adjacent lines is closer to matching. Opposite of the metric caliper, it's a little less accurate than the actual lines.
Even though the actual lines of the inch caliper measure about four times more accurate than the metric caliper, in reality it's less. How much depends on the calipers and the experience of whoever is using them. The difference is close to insignificant for clarinet tenon lengths.
BTW some inch calipers only measure to the closest 1/128" and then they are less accurate than a regular metric caliper. I assume the post was referring to a 0.001" inch caliper.
It's different with digital or dial calipers.
Post Edited (2020-11-07 08:00)
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