Screw Conveyors
Screw Conveyors
(OP)
General Question
What would the selection criteria for using shaft versus shaftless screw conveyors?
Are there any major advantages of one over the other?
What would the selection criteria for using shaft versus shaftless screw conveyors?
Are there any major advantages of one over the other?





RE: Screw Conveyors
Shaftless screws can go around corners, but tend to wear the casing because the casing acts as the guide. OK for occasional use on coarse nonabrasive materials such as grain. Also sizes are normally small.
For heavy continuous duty use shaft.
For occasional light duty use shaftless.
I got landed with a shaftless screw for conveying sand. Total misapplication and I had to pull it out. We call them "chook-feeders"
Cheers
Steve McKenzie
RE: Screw Conveyors
Shafted conveyors also seemed to convey better on inclines then the shaftless and the shafted lets water drain better when flushed. The shaftless conveyor runs on a teflon wear pad that seals the flights and prevents flushing water from draining.
Mike Bensema
www.dutchmenservices.com
RE: Screw Conveyors
I presume that is the reason for use it in sludge conveying applications.
On the other hand, standard screws with shafts have ability to be used as rather precise dosing devices in a wide range of applications. (I saw screws with 10 mm as well as 150 mm in diametar serving the same purpose).
RE: Screw Conveyors
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RE: Screw Conveyors
I'm doing a subject at Uni - Materials Handling and the lecturer is from the grain industry and unfortunately is only discussing shafted conveyors.
I was wondering the selection criteria for the conveyor type. Thanks for everyones input.
Andrew
RE: Screw Conveyors
www.geocities.com/brybolt/calculate.html
RE: Screw Conveyors
1) flexible bits of wire that go in small diameter (3"-4") bits of flexible tube for very light duty applications
2) 1/4" thick flighting designed to go in more conventional screw conveyors.
I was involved with a 12" screw conveyor handling fine wet coal which built up very quickly between the flight and centre tube. We changed to a centreless screw and the problem went away.
RE: Screw Conveyors
RE: Screw Conveyors
hello sewerfix,
you will get answer for you qustion from the site
www.martinsprocket.com
www.arlat.com/conveyor.htm
varrier
RE: Screw Conveyors
RE: Screw Conveyors
Bob
RE: Screw Conveyors
RE: Screw Conveyors
Mike Bensema
www.dutchmenservices.com
RE: Screw Conveyors
RE: Screw Conveyors