Please see the following link for rotator sizes and specifications or call us for details and pricing http://www.avs-hydraulikmotoren.at/Produktee.html
The hydraulic rotators we supply from Rima are very good units and are are great budget alternative.
We stock the GR10, GR30, GR30F,GR50F and GR100F (F stands for flange mount as seen in the picture) All the rotators bolting patterns will retrofit all standard mounting patterns
A simple way to corectly size a rotator for your machine is match the weight of your machine with the rating of the rotator a GR30F for a 3t excavator ora 3 ton per metre crane
Slew drives/worm drives are immensly strong rotators that turn at a rate of approx 3rpm and once stopped will not rotate unless activated again making them ideal for pole manipulator grabs and tree shears. To operate a grab you will need to get 2 hydraulic pipes through the middle. To do this we have a special 2 pipe swivel which means you can continuously rotate the attchment without damaging the pipes. The swivels are sold seperately. Worm drive rotators are extremely good value for money but the bolt patterns will most likely not retrofit existing grabs