Cyclo Reduction Unit

[LegendLength]

Just wondering if anyone has looked at these reduction units: http://www.smcyclo.com/modules.php?name ... id=&subid= .

The technical specs are in PDF form at http://www.smcyclo.com/modules.php?name ... id=&subid= .

It's pretty hard to read like most gearbox specifications, but it appears to have some models that do up to 43 : 1 reduction and can handle 6,000 rpm continuous. The weight for that one is 1.2 kg / 2 lbs (size code '106' in that pdf).

Don 't know the cost or if they're even available to laymen.

[sn0wchyld]

looks like theyre pretty long... from a quick look looks like you'd need at least a 108, 106 only has a 25nm output torque below 1500rpm, even a small 6374 motor would come close to exceeding this on about 2kw or so... unfortunatly if im reading it right the 108 is 1bout 18cm long... and to get a resonable safety margin for the big 80100 type motors you're looking at the 110 - 24cm long! kinda hard to work with on a bike. the a nugart pl80 would be better, about 10cm long, 100nm output, 2.5kg, 6000rpm input. if you can wait for a deal they pop up on ebay at around the $3-400 mark occasionally. ple8090 is basically the same thing if you happen across one too. you might get away with a ple60 on a low power setup (there about 40nm output from memory).

data sheet if you need
http://www.neugartusa.com/Produkte/E-cat-08.pdf

ple8090
http://www.ebay.com.au/itm/NEUGART-PLE80-90-5-USPP-PLE80905-/220677834880?pt=BI_Control_Systems_PLCs&hash=item33616c8880#ht_749wt_677
email them and ask for USPS shipping instead of ups - mine was $40 rather than $185 for my ple80 (to australia) took about 2 weeks.

[LegendLength]

Thanks for the info. I remember looking at the neugart a while ago and noticed a couple of people gave it a try here on ES. I just can't work out why we can manage to build reasonably light belt driven / jackshaft gearboxes yet the big companies with million dollar equipment can't. Maybe I'm just frustrated that large companies find us too small a market currently.