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					Originally Posted by  Rimrock
					 
				 
				For pulleys and timing belts suitable for scalemodels one can look for the standards '2GT' or '3M', typically 3 different widths. There are quite a good offer of at ebay of the most common diameters at good prices; search for e.g. 'pulley 2gt'. 
 
Regarding hydraulics, motors and more, as mention above, describe a bit closer what you are planning to build and if it's a 'budget' or 'high end' project you are aiming at. 
			
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 Look bove this post for my info meant to tag ur message the first time