more fun with knucklebooms
- Thread starter MikePoor
- Start date
- Location
- urbana, il.
![381932-photo[1].webp](/forum/data/attachments/26/26828-a70e9cc3e87569df4c5aee66d34e6eb0.jpg?hash=xCr4vVlN3k)
limbcontrol
New member
Keep them photos coming Mike! Keeps me drooling as I sit here waiting for my Kboom to be finished
BTW how much do you estimate that trunk to weigh?
BTW how much do you estimate that trunk to weigh?
treehumper
Carpal tunnel level member
- Location
- Ridgefield, NJ
Mike, that is insane! Or photoshop.....
dbl612
Participating member
- Location
- torrington, ct.
the net effective load imparted by the out of level condition is the same on the boom weather 10' or 100' of cable down from tip. while knuckle boom are more tolerant to out of level conditions than stick booms, its still hard on the machine's rotation mechanism and boom slide components. most kbooms have high rotational power because most employ a rack and pinion drive system which is slower but has more torque. everything works best when it is set up level-stick or kboom.
dbl612
Participating member
- Location
- torrington, ct.
you guys think this is photoshop or a 25-30k log on truck?
- Location
- urbana, il.
photoshop hahaha.....I don't even know how to photoshop 
THAT LOG WEIGHS 32700 LBS. well past my payload but I only had to go around the corner to dump it. My 175 ton would pluck that at a radius of 51ft....but for that crane it wasn't lifted all at once....more of a controlled one end at a time lift into the bed. here is another over payload only going a short distance
THAT LOG WEIGHS 32700 LBS. well past my payload but I only had to go around the corner to dump it. My 175 ton would pluck that at a radius of 51ft....but for that crane it wasn't lifted all at once....more of a controlled one end at a time lift into the bed. here is another over payload only going a short distanceAttachments
.webp](/forum/data/attachments/26/26845-6fb321b7f4d097749499683805352a97.jpg?hash=3kn1kB-TlM)
treehumper
Carpal tunnel level member
- Location
- Ridgefield, NJ
That is insane then Mike! Cool pics, thanks!
SuperK
New member
- Location
- Quarryville
Awesome I need to buy a knuckleboom. Whats the sticker on them for a set up like yours? Make tree work look so easy!!
- Location
- Asheville, NC
If you need to ask, then it's too much! Crazy expensive for the best k booms in the world. I'd guess this unit is pushing the 500k range, if not more. Brand new effer 655 6+6 is around 289k for the crane sitting on the ground.
limbcontrol
New member
Mike, do you strap the load in with ratchet straps? I am having my body built with d rings on top of the dump bed rails to secure straps for those over the sides loads.
Courierguy
New member
- Location
- Idaho
31,700 LBS AT 51'? Did I read that right? I am of the camp that still doesn't get how the K booms can do so much with what looks like so little. Though I do get that the generally higher hydraulic pressures they run at help a lot, up around 5,000 psi v. 2 or 3 K psi for a stick boom I think. But 31,700 lbs at 51' is frigging awesome!
Bixler
Participating member
- Location
- Nevada City, CA
Awesome Mike
- Location
- Cleveland,oh
[ QUOTE ]
photoshop hahaha.....I don't even know how to photoshop THAT LOG WEIGHS 32700 LBS. well past my payload but I only had to go around the corner to dump it. My 175 ton would pluck that at a radius of 51ft....but for that crane it wasn't lifted all at once....more of a controlled one end at a time lift into the bed. here is another over payload only going a short distance
[/ QUOTE ]
Again I must be missing something,I just looked at the 1750 load chart and it doesn't come anywhere near 32,700 pounds at 51 ft.looks to me like the 8S main boom is good for 15,255 at 55 ft. radius.
photoshop hahaha.....I don't even know how to photoshop
THAT LOG WEIGHS 32700 LBS. well past my payload but I only had to go around the corner to dump it. My 175 ton would pluck that at a radius of 51ft....but for that crane it wasn't lifted all at once....more of a controlled one end at a time lift into the bed. here is another over payload only going a short distance [/ QUOTE ]
Again I must be missing something,I just looked at the 1750 load chart and it doesn't come anywhere near 32,700 pounds at 51 ft.looks to me like the 8S main boom is good for 15,255 at 55 ft. radius.
dbl612
Participating member
- Location
- torrington, ct.
that chart is based solely on the location of the boom point in relation to the vertical centerline of the crane. the cg of the load does not change in a static condition relative to the height of the load off the ground or the amount of cable out.
- Location
- Cleveland,oh
[ QUOTE ]
that chart is based solely on the location of the boom point in relation to the vertical centerline of the crane. the cg of the load does not change in a static condition relative to the height of the load off the ground or the amount of cable out.
[/ QUOTE ]
don't have a clue what your talking about
that chart is based solely on the location of the boom point in relation to the vertical centerline of the crane. the cg of the load does not change in a static condition relative to the height of the load off the ground or the amount of cable out.
[/ QUOTE ]
don't have a clue what your talking about
dbl612
Participating member
- Location
- torrington, ct.
responding to classics out of level chart. my apologies i clicked in wrong area.
- Location
- Cleveland,oh
[ QUOTE ]
responding to classics out of level chart. my apologies i clicked in wrong area.
[/ QUOTE ]
lol ok,that was confusing to an already very confused mind.
responding to classics out of level chart. my apologies i clicked in wrong area.
[/ QUOTE ]
lol ok,that was confusing to an already very confused mind.
- Location
- urbana, il.
Ooooops no you're right 31 ft w/o jib!!!!!! And mine is way over the standard 1750 chart because of the integrated sub frame with built in stabilizers that angle to the front and rear making it much more stable than the standard. I've heard they won't be making those any more but they are switching to crosstab stabilizer design which is similar. It allows you to work over the front with much greater stability and they don't extend any further than the front bumper of the truck so there is no wasted space
- Location
- urbana, il.
The crosstab stabilizers are really unique. One runs at a 45 degree angle toward the front corner of the footprint. The other side swings around at about the same angle......if there is something in the way you can swing it back a few degrees and set it down there and the monitoring device adjusts your capacity. Would be handy sometimes instead of trying to park the crane at an angle to get around obstacles for stabilizer set up. (that's ok dbl612.....I posted in the wrong thread last night........you can tell its been cold.....people on here posting and not working until 9:00 every night
