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Grapple 1 . Rotating grapple for my excavator CAT 318C again in scale 1:17,5. Uses micromotor and turntable for rotating, grapple uses pneumatics. . When I was building the excavator I knew I wanted to use it differently. Since there are a lot of “digging” excavators out there and I have this love for logging trucks I decided to make the excavator capable of loading such. Building a rotating grapple would be so much fun I said to my self. First attempts used two small pneumatic cylinders, but since these are very expensive and not that strong I started working on one with one large cylinder. Rotating is done by a micromotor, since I do have two and no investment had to be done I thought it was OK to use one. It is very light and no gear reduction was necessary since I use a 8 tooth gear on the technic turntable. With small creations like this you have to make sure not to squeeze in to much stuff. Even though the grapple is rather large for the scale of 1:17,5 I think it is great to have one. For more pictures on this model click this to check out my Brickshelf Gallery. This creation has one drawback and that is its weight. A total weight of 111 gram (0.2 lbs) is already about as much as my CAT can lift. Lifting logs with it does work though, but it is very slow and battery draining. I wanted to document this creation first before moving on to a lighter version because I like it a lot, it works great and I spend quite some time building. Maybe you like to build it your self some day, here are building instructions.

LEGO models my own creation MOCpages toys shop

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