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  #1  
Old 11-03-2010, 09:31 PM
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Default log grapple
anyone have any ideas how i can make a log grab open and close without using hydralics
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  #2  
Old 11-03-2010, 09:57 PM
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Default Re: log grapple
What will you be putting the grapple on? Maybe a cable driven system like a clam bucket on a crane would work?
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  #3  
Old 11-03-2010, 10:06 PM
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Default Re: log grapple
it will be on an excavator just dont want to buy another valve
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Old 11-03-2010, 10:09 PM
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Default Re: log grapple
i made one just using a small srevo work ok but i need to do some reworking on it you should find one with metal gear's cus my plastic did not last long when i was towing the shop's push broom around. what are you looking for it to go on?




or this is a cale one i made has more power but should have made the grapple arms thicker and interlock to stop twisting.
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Old 11-03-2010, 10:10 PM
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Default Re: log grapple
You could try using a standard servo..Hitech makes a few very strong ones that you could try and hide in the grapple body and use mechanical linkage
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  #6  
Old 11-03-2010, 10:21 PM
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Default Re: log grapple
how do you do the likage for it
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  #7  
Old 11-04-2010, 03:09 PM
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Default Re: log grapple
i will find some pic's of it when i get home what kind are you looking to do? loader stile or for a skidder? cus they are a little different.
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Old 11-04-2010, 08:46 PM
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Default Re: log grapple
its for a log loader
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Old 11-04-2010, 08:58 PM
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Default Re: log grapple
servo would be easy and the size you want a standard servo would work
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Old 11-04-2010, 09:07 PM
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Default Re: log grapple
yeah im thinking of saving money i have the ram but dont have the funds for another valve
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  #11  
Old 11-04-2010, 09:09 PM
td9clyde td9clyde is offline
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Default Re: log grapple
well do you want it crancked out with a place for a standard servo
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  #12  
Old 11-04-2010, 09:33 PM
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Default Re: log grapple
yes that will work
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Old 11-04-2010, 10:13 PM
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Default Re: log grapple
are you shure???? lol
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  #14  
Old 11-04-2010, 10:20 PM
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Default Re: log grapple
well it should be big enough to get theservo or the ram in there correct
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Old 11-05-2010, 07:03 AM
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Default Re: log grapple
but for the linkage thats what is different between the two
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  #16  
Old 11-05-2010, 09:38 AM
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Default Re: log grapple
go with the servo
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  #17  
Old 11-05-2010, 03:20 PM
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Default Re: log grapple
not sure how much torque you want but hobby city do some heavy servos at good prices http://www.hobbycity.com/hobbyking/s...&ParentCat=189 id avoid the bluebird servos though as ive burned a few of those out on my monster truck steering
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  #18  
Old 11-05-2010, 08:05 PM
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Default Re: log grapple
honestly i can say i have never burnned out a servo
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  #19  
Old 11-06-2010, 11:38 PM
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Default Re: log grapple
well i have an all steel grapple made but for the size the servo hangs out the back is that ok?
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  #20  
Old 11-07-2010, 12:35 AM
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Default Re: log grapple
yeah that is fine you got some pics
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