rScotty
Super Member
- Joined
- Apr 21, 2001
- Messages
- 9,454
- Location
- Rural mountains - Colorado
- Tractor
- Kubota M59, JD530, JD310SG. Restoring Yanmar YM165D
Let me give you a hand with those specs. We can do this in a form that applies to most of the small tractors you are looking at.
I see that you are wanting to lift pallets of a certain size and weight.
For that, the spec for lift at the pins doesn't help much. Manufacturers like to use that spec at the pins because it is the highest number - but nobody actually lifts anything at the pins. The weight is always farther forward.
So you need to find the spec for lift at some distance forward of the pins and include the weight of the mounting system plus bucket and forks, With those numbers, you can then deduct for the weight of the mounting system and bucket or forks and then figure out what you can actually lift.
Unfortunately, for homeowner machines those real loader specs are often hidden or fudged. But we can estimate and come darn close.
For example, even if specs are given forward of the pins, they are usually given at 50 cm forward of the pins.. even though a pallet is designed to be loaded with the center of gravity at 60 cm. That's about a 15 to 20% fudge right there.
But we don't care. We simply include it in our estimate.
Here Goes: Hold onto your calculator....
First of all we weigh the bucket, forks and mounting parts, Typically those parts forward of the pins on a subcompact or compact FEL SSQA with bucket and forks are going to weigh in the 150 lb to 200 lb (70 to 90 kg) range.
The other thing we know is that on average, most loaders that give the lifting spec at the pins, will lift about 2/3 that amouht at 50 cm forward of the pins.
So 2/3 of a 568 kg lift is 375 kilos. Now knock off another 15% of that out a bit farther to the typical center of gravity of the pallet and we have 325 kilos lift available out at the middle of the pallet.
This is where we add the weight of the SSQA and bucket or forks - and we pretend that weight is also at the center of gravity under the middle of the pallet, We already estimated their weight above, so we move that weight out to be at the center of gravity (CG) as well and knock off another 80 kilos. Now we are at 250 kilos max.
Remember, this is all just an estimate - but probably not that far off for a subcompact to maybe 25hp smallish compact tractor. You don't want to be lifting at max and trying to drive around safely at the same time... but a machine with some counterbalance weights ought to be able to handle 75 or 80% of the max lift safely enough for loading and unloading.
That puts us at 80% of 250 equals an honest 200 kilos (450 lbs) of materials on a pallet that the subcompact you mentioned ought to be able to handle safely. And it will probably handle another 20% with some risk.
Hope this helps,
rScotty
I see that you are wanting to lift pallets of a certain size and weight.
For that, the spec for lift at the pins doesn't help much. Manufacturers like to use that spec at the pins because it is the highest number - but nobody actually lifts anything at the pins. The weight is always farther forward.
So you need to find the spec for lift at some distance forward of the pins and include the weight of the mounting system plus bucket and forks, With those numbers, you can then deduct for the weight of the mounting system and bucket or forks and then figure out what you can actually lift.
Unfortunately, for homeowner machines those real loader specs are often hidden or fudged. But we can estimate and come darn close.
For example, even if specs are given forward of the pins, they are usually given at 50 cm forward of the pins.. even though a pallet is designed to be loaded with the center of gravity at 60 cm. That's about a 15 to 20% fudge right there.
But we don't care. We simply include it in our estimate.
Here Goes: Hold onto your calculator....
First of all we weigh the bucket, forks and mounting parts, Typically those parts forward of the pins on a subcompact or compact FEL SSQA with bucket and forks are going to weigh in the 150 lb to 200 lb (70 to 90 kg) range.
The other thing we know is that on average, most loaders that give the lifting spec at the pins, will lift about 2/3 that amouht at 50 cm forward of the pins.
So 2/3 of a 568 kg lift is 375 kilos. Now knock off another 15% of that out a bit farther to the typical center of gravity of the pallet and we have 325 kilos lift available out at the middle of the pallet.
This is where we add the weight of the SSQA and bucket or forks - and we pretend that weight is also at the center of gravity under the middle of the pallet, We already estimated their weight above, so we move that weight out to be at the center of gravity (CG) as well and knock off another 80 kilos. Now we are at 250 kilos max.
Remember, this is all just an estimate - but probably not that far off for a subcompact to maybe 25hp smallish compact tractor. You don't want to be lifting at max and trying to drive around safely at the same time... but a machine with some counterbalance weights ought to be able to handle 75 or 80% of the max lift safely enough for loading and unloading.
That puts us at 80% of 250 equals an honest 200 kilos (450 lbs) of materials on a pallet that the subcompact you mentioned ought to be able to handle safely. And it will probably handle another 20% with some risk.
Hope this helps,
rScotty