Step-Syn 102H7123-1742

[Shanghyd]

I purchased 2 Step-Syn motors on ebay.
They are labeled Step-Syn 102H7123-1742
Does anyone have information about these motors?
They are labeled DC 4A but it doesn't list the volts.

[vladdy]

You sure they're not 103 series? Nema 23, 56mm square, 1.8 degree /step [200 step /rev]..that's the usual 7123 size.. If its about 2.1 inches long hold torque might be around 115 oz/in, 1.7" and 2.5" would be around 55 and 140 oz/in respectively.. oh yeah , four wire leads..

sorry, forgot the actual question.. probably origionally designed for around 3 to 4 volt, which means you can drive them [safely] at 24 to 36 volts..just run them for a bit on a controller set to freewheel [constant motion] and see how warm they get, proabably safe to start at 1.5 to 2a drive, and then move up in stages..

[Shanghyd]

Looking a little closer they are 103's

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3852711280
I was going by the sellers description but zooming in on the picture seems to show a 103 not 102

[vladdy]

Looked at the item there, the desciption does indicate 103 series further down..
got yourself a godd buy..

enjoy..