Tachometer Test Results

Got some interesting results testing the Veglia Tach which was on the bike with a Smiths Tach which came in a box of parts,source unknown. My Speedo is a Smiths and was hoping to match the guages. The Veglia read correctly on the bike . Looks like i will have to stick with the Veglia

Drill: rated at 0-1500 rpm according to label (Dewalt 18v)

Veglia: 3000 rpm - apparently 2 rpm/rev

Smiths: 6000 rpm - apparently 4 rpm/rev

http://www.flickr.com/photos/52577093@N03/5564881371

Here we go, figured out how to post a photo


Norton Tachometers by niagaraz, on Flickr

Do you have a tach on the drill, otherwise I wouldn't trust the rpms on it.

Niagara850 said:

Drill: rated at 0-1500 rpm according to label (Dewalt 18v) My Speedo is a Smiths and was hoping to match the guages. The Veglia read correctly on the bike . Looks like i will have to stick with the Veglia



Veglia: 3000 rpm - apparently 2 rpm/rev

Smiths: 6000 rpm - apparently 4 rpm/rev

Click to expand...

Both units are 4:1 ratio (it's printed on the dials), and 1500 x 4 = 6000-so the Smiths gauge appears to be reading correctly and the Veglia is way off.

Hmmm , Thanks for confirming my contradiction. I expected a 4:1 ratio from the info on the dials, yet Veglia field tested on the bike, tests low ... I runderstand the drill will give me approximate results, but I expected the same relative reading. A retest is in order