dcgraves.com seems to have plenty of information on roller conveyors. You can also check wikipedia for more information and advice on roller conveyors.
There are many companies that sale roller conveyors. Among them are Corner Stone AutoSys, HarryMajorMachine, ULine, SpecialtyEquipment, and Cisco-Eagle.
you can find many great deals on quality roller conveyors at http://www.globalindustrial.com/c/material-handling/conveyors/roller-gravity and other sites such as http://www.hiroller.com/ and http://www.interroll.com/?wm=m(1526)sp(1500)
Used roller conveyors can be purchased in Shanghaideren, which is a manufacturer and supplier of conveyors, where the best conveyor equipment is available.
Roller bearing
One can shop for a Roller conveyor online on several websites. One can shop for such items on websites such as Amazon, eBay, Conveyors, Grainger and IndiaMart.
Try contacting other warehouses or warehouse companies to see if they have any old or used conveyors that they no longer are putting to use. If you want new, get in the phone book and look up companies. Do price quotes first then decide.
The types of conveyors used in cement industry are,Belt conveyorsRoller conveyorsCable conveyorsPipeline conveyorsScrew conveyorsElevating conveyors.
Buying conveyors used is a good way to save some money. Conveyors can be purchased used at Excess Equip or Used Conveyors For Sale. Craigslist and eBay are always good sources for used items as well.
The best website to buy belt conveyors from is www.gilmorekramer.com. They have a wide selection of belt conveyors to best suit the needs of your new company.
Dematic pallet conveyors are convey systems that typically can support a heavy load and work efficiently in a variety of industries. Specifically Demantic is a company that manufactures pallet conveyors.
The following companies manufacture material handling conveyors: Cemanet, Sriaariengg, Conveyor Handling Company, Thomasnet, Mheus, AGC Converyors, Shuttle Worth, Decon Conveyors, Kornylak.
Gravity conveyors are typically used to rapidly move products over rollers with the use of gravitational forces via slanting sections or similar techniques in lieu of powered motors, rollers or conveyors.