Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Fabrication

SFT Search:   
Reply
 
Thread Tools Display Modes
  #21  
Old 11-29-2017, 01:26 PM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 13,798
Default

Quote:
Originally Posted by Bender View Post
It seems like they build them for about $1500 in labor. Not to mention the NHTSA stamp, although I would certainly overbuild it.
Bender, After having repaired one or two, I realized how right you are. I think Joey has a story or two there also
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville.

The virtue is always a cover for the sin. That's the key to understanding the modern left. Whatever they're accusing you of doing, they are doing themselves but more enthusiastically. And that's definitely the story of Justin Trudeau. Tucker Carlson
Reply With Quote
  #22  
Old 11-29-2017, 02:12 PM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,755
Default

Quote:
Originally Posted by Ironman View Post
The wet kit tank holds 40 gallons of oil. I've owned one.
A class 8 truck has the room and frame strength for this.

I was wrong. This one is 50 gal
So what ?

On a small "car hauler" two axle dump trailer, the difference between
a double acting scissor lift, and a single acting "oil hog" multi section
won't amount to much.

Everything in proportion.

And no heavy scissor weldments, bushing & pins to wear out, etc.

The one I provided a linky to, makes the multicylinder with a trunion
mount to be just like the "big boys" mounted vertically at the front.

However, the trunion mount enables it to sit tight to the trailer without
the usual "tee pee" box for the cylinder.

Using qty (2) of them on a 14k gooseneck dump won't consume
much over 10 gallons of oil.
Reply With Quote
  #23  
Old 11-29-2017, 02:36 PM
greywynd's Avatar
greywynd greywynd is offline
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 4,763
Default

Biggest issue I see with many dump trailers is they are too low. It takes 15' of forward motion to dribble the stuff out the back. I've seen a couple that were built higher, and they worked way better.

The problem I see is trying to make them multi-purpose, keeping them low makes it easier to load equipment etc.

At the end of the day, even when I had a decent dump on my one ton, it's way cheaper to pick up the phone and get it delivered overall.
Reply With Quote
  #24  
Old 11-29-2017, 06:38 PM
kbs2244 kbs2244 is offline
Elite Member
 
Join Date: Sep 2006
Location: Way North Illinois
Posts: 1,640
Default

The advantage of the scissors lift is that in gives a flat floor all the way to the front wall.

It works fine for somewhat light loads.

But when the weight becomes too much for the friction involved the vote goes to a straight action, centered, telescopic cylinder.

All the gravel carrying semi-trailers are done this way since the load doesn’t care about the wedge-shaped clearance cut into the front floor.
Reply With Quote
  #25  
Old 11-29-2017, 08:04 PM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 13,798
Default

Quote:
Originally Posted by digger doug View Post
So what ?

On a small "car hauler" two axle dump trailer, the difference between
a double acting scissor lift, and a single acting "oil hog" multi section
won't amount to much.

Everything in proportion.

And no heavy scissor weldments, bushing & pins to wear out, etc.

The one I provided a linky to, makes the multicylinder with a trunion
mount to be just like the "big boys" mounted vertically at the front.

However, the trunion mount enables it to sit tight to the trailer without
the usual "tee pee" box for the cylinder.

Using qty (2) of them on a 14k gooseneck dump won't consume
much over 10 gallons of oil.
I looked at that design again, and I like it better than scissors, because it is double acting and simple to build. Same idea in underground mine trucks, except they have a hump inside for the cylinders. I think you could have a flat floor with a little planning and by making a drop down cylinder mount in front of the tire you could really increase your lift.
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville.

The virtue is always a cover for the sin. That's the key to understanding the modern left. Whatever they're accusing you of doing, they are doing themselves but more enthusiastically. And that's definitely the story of Justin Trudeau. Tucker Carlson
Reply With Quote
  #26  
Old 11-29-2017, 09:22 PM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,755
Default

I have the drawing around here somewhere but can't find it
(from best metal products, neighbor had a run of them made,
they are semi custom) Unlike the big trucks that simply
mount on the bottom (and require the teepee) the trunion
mount allows the cylinder to "kick out" towards the cab,
but only as it progresses upwards (and is above the cab at this point)
so a teepee is not needed.

Here is another option, for an underside cylinder without
all that steel and machining for a scissor:

http://http://vi.vipr.ebaydesc.com/w...1&secureDesc=0
Reply With Quote
  #27  
Old 11-30-2017, 08:24 AM
Walker's Avatar
Walker Walker is offline
Standard of Excellence
 
Join Date: Aug 2004
Location: Cave Creek AZ
Posts: 4,404
Default

That last linky no worky.

I had initially dismissed the undercount single cylinder, as well as the front mount multi stage for several reasons. First, that I have built and used several of the scissor hoists and am comfortable with them. Second, cost. Last I looked at a decent size multi stage they were expensive. I had also assumed an under mount single cylinder would have to be a bit longer, pushing up the cost.

I went on to the surplus center site and a 4x36x2 DA ranges from $200-$500. This is much cheaper than I had expected. While a big multi stage runs about the same cost as a scissor lift.

With this unexpected development I am likely to revise my plan and just use a single cylinder. I think this will make the trailer build simpler in the long run.
__________________
Walker
Chief slag chipper and floor sweeper, Ironwood Artistic
Reply With Quote
  #28  
Old 11-30-2017, 08:52 AM
JohnBoy's Avatar
JohnBoy JohnBoy is offline
Director of Languages
 
Join Date: May 2006
Location: Southern Ireland
Posts: 2,399
Default

http://ramko.co.uk/tipping-rams/10t-...pping-ram.html

this is what would be used over here, not a big multi stage out front, only see the front mounts on proper trucks with big oil tanks and pto pumps

the one above would be used on smaller ag trailers, or paired for capacity and stabiluty.


Here's some smaller ones, these get used in utility tippers like I linked a few posts up.

http://www.ebay.ie/itm/HYDRAULIC-STA...AAAOSwiLdV9pJV
Reply With Quote
  #29  
Old 11-30-2017, 10:02 AM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,755
Default

Quote:
Originally Posted by JohnBoy View Post


Here's some smaller ones, these get used in utility tippers like I linked a few posts up.

http://www.ebay.ie/itm/HYDRAULIC-STA...AAAOSwiLdV9pJV
Take this one, and add a trunion mount and you have what I was describing
(and cannot %$#@! find my drawing/file of it)

If you use 2 of those, the amount of stresses goes down, from 1 concentrated
point, and you can use less bracing underneath, saving precious weight.

It's all about a compromise between keeping the empty weight
down, and maximizing what it will haul.
Reply With Quote
  #30  
Old 12-01-2017, 09:04 PM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,755
Default

This trailer appears to be using plain ole cylinders, with no scissor mechanism:
http://www.americantrailerllc.com/tr...-dump-trailers
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 11:08 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.