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Old 10-19-16 | 12:38 PM
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Ronno6
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Joined: Nov 2010
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From: Deep South

Bikes: Cannondale SR's and ST's from the '80's

Hozan Tensionometer

Do any of you guys use a Hozan C-737 Spoke Tensionometer??
I have used one for many years, but have never been certain about the calibration.
The tool was accompanied by a chart depicting the spoke tension plotted against the
deflection reading on the dial indicator.
For reference, one complete 360° sweep of the dial indicator is 0.10mm. That deflection
translates to about 40kgf tension on a 14ga high carbon steel spoke (useless for SS ?)
The graph pretty much goes vertical in the kgf value (max 150kgf shown) when the dial indicator approaches 0.15mm deflection on the dial indicator. That is the limit of the graph.
Using the musical pitch method seems to reconcile at about 0.19mm on the dial indicator.
I have typically used 0.18mm to 0.19mm as the proper tension range for 14/15/14 spokes, and a tad higher
for 14ga straight (0.20mm reading.)
All spokes I use are stainless.

As these readings are off the graph, I do not know what the actual tension is....

Does anyone have experience with this tool?
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