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DuraBelt - Elastic Urethane Flat Belting, Tracking Sleeves, Stretchy, Belts, Anti-Snag Flat Belts
Dura-Belt   800-770-2358
 
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Elastic, Stretchy Flat Belting and Belts move heavy loads

  • Elastic stretchy urethane.
  • Thicknesses: .031", .050" .063", .094", .125", .313" (.8mm, 1.3mm, 1.6mm, 2.4mm, 3.2mm, 8mm)
  • Any width up to 34.5" (876mm) for .031" and .062" thick
  • Any width up 18" (457mm) for .094" and .125" thick
  • Our .313" (8mm) thick belts are .401" (10.2mm) and .625" (16mm) wide and have round edges or sides.
  • Any length above 3.5" (89mm)
  • Colors: clear .031" & .063" (.8mm & 3.2mm), black .050" &.063" (1.3mm & 1.6mm), and orange .094" & .125" (2.4mm & 3.2mm)
  • Durometers: 78A, 83A, 85A, 87A, 92A, 95A
Elastic Stretchy Flat Belt
Elastic Stretchy Flat Belt

Tracking Sleeves

  • Crowns rollers -- prevents flat belts from walking.
  • Fits tightly under flat belt -- see red sleeve in picture.
  • Usually only one is installed on drive roller.
  • Easily installed with our RAVE technique.
  • Stays put. Will not move.
  • Available in several different sizes:
    - .031" thick 92A for belts up to 1.5" (38mm) wide
    - .062" thick 83A for belts up to 34.5" (876mm) wide
    - Sleeve width from 20% to 50% of flat belt width
tracking sleeve
Red Tracking Sleeve under Flat Belt
Note:  The actual sleeves are clear not red.

Wide Flat Belts on Rollers

Combinations of wide elastic belts can move heavier loads. Flat belts have much more surface contact area than round belts so slipping is virtually eliminated. Our flat belts do not need belt tensioners. Low bending loses makes them extremely energy efficient. Lets you use low powered, inexpensive MDRs to move heavy boxes on long zones. Powered roller should be located on downstream end (see red end caps in picture). Available in any width up to 34.5" (876mm) in 1/32" and 1/16" (.8mm and 1.6mm) thicknesses. Any width up to 18" wide (457mm) in orange 3/32" and 1/8" (2.4mm and 3.2mm) thicknesses.
wide flat belts
Flat belts move heavier loads

Flat Belts Increase Motorized
Roller Zone Length

Round belts usually limit powered motorized roller zone length to a maximum of 10 rollers because the belt's thin area of roller contact limits the amount of torque that can be transferred before round belts begin to slip. Wide urethane flat belts do not have this limitation, so slipping is virtually eliminated. Therefore, zone lengths of 20 or more rollers are possible. In fact, except for extremely heavy boxes, the only thing that limits zone length is the torque of the motorized roller. Since our wide flat belts are elastic, they do not need belt tensioners, so they can be retrofitted onto conveyors without changing rollers. Our flat belts are more economical than our Poly-V® multi-ribbed belts because they do not need grooved rollers. However, Poly-V belts are better at moving extremely heavy loads, even pallets, at very high speeds. For more information click here.
flat belts on long powered motorized roller zones
Flat belts on long motorized roller zones
(20 rollers or more)
Due to larger mass, wide flat belts are stretched much less than round belts. For example, our 1/16" (1.6mm) thick x 4" (100mm) wide belts are typically stretched 3.3%. Please use our belt tension calculator to determine acceptable tension and stretch for your width and thickness

Flat Belts on Inclines/Declines

12 Degrees. The shiny side of our flat belts has a high Coefficient of Friction (COF) in a clean wash-down environment, but dust can stick to the shiny side and reduce its COF, so do not use the shiny side on inclines and declines over 12 degrees.
16 Degrees. The matte side of our flat belts shuns dust, which gives it a higher COF in dusty environments, so it can move boxes and paper bubble envelopes on inclines and declines of up to 16 degrees*.
45 degrees. With orange cleats fused to our belts, boxes can move on inclines and declines up to 45 degrees as in the adjacent picture.
Flat belts with orange cleats move boxes on inclines/declines of up to 45 degrees degrees
Flat belts with orange cleats move boxes
on inclines/declines of up to 45 degrees

Flat belts much wider than long
(Short, wide flat belts)

Some flat belt experts will tell you that flat belts need to be longer than they are wide in order to track properly (not walk sideways). Dura-Belt's elastic flat belts are the exception. Our flat belts will track regardless of the length to width ratio. Adjacent is one that is 34.5" wide on 9" centers.

Short, wide flat belt
Short, wide flat belt

Stretchy elastic belts will track on
roller grooves without tracking sleeves or belt tensioners

Our stretchy elastic flat belts will track on roller grooves. Specify the belt width so it extends 5/16"(8mm) beyond the edges of the roller groove edges. After the belt is stretched on the rollers, the belt edges will bend slightly over the groove edges. This causes the belt to act as if there were two v-guides on each belt edge, thereby eliminating the need for tracking sleeves, roller crowns, v-guides or belt tensioners. Frames must be square (not warped). Ton keep the rollers aligned,the gap between endcaps and frame can be kept constant by using felt or plastic washers. Initial belt tension should be 80 lbs. Installation may appear difficult, but it is much easier than it looks. Simply grasp the last roller, insert its shaft into one frame hole, and insert a flat screw driver in the unused adjacent hole in the opposite frame, i.e., the hole used to skew rollers, usually 1" from the target hole. Now press the screw drive blade against the roller edge, using the hole as a fulcrum, and leverage the roller into the target hole. The hex shaft is perfectly oriented to the hex target hole, so it snaps in quickly -- only takes a few seconds. If there are no skew holes, then you would need to drill one. The elimination of tracking sleeves, v-guides and belt tensioners greatly reduces costs and speeds up assembly.
Elastic flat belt tracks on roller grooves
Elastic flat belt tracks on roller grooves

Anti-Snag Flat Belts

  • Helps prevent boxes from dislodging belts.
  • Shiny side has higher surface contact so in clean wash-down environments it has the higher COF. However, dust, e.g., cardboard dust, tends to stick to the shiny side and lower its COF, so in dusty environments put the shiny side on the underside of the belt.
  • Matte side shuns dust, so it has a higher COF in dusty environments. To prevent boxes and paper bubble envelopes from slipping on inclines/declines of up to 16 degrees*, put the matte side on the topside of the belt.
*Note that different container surfaces may behave differently on any flat belt surface. For example, our matte side can convey boxes and paper bubble envelopes on inclines/declines up to 16 degrees, but plastic envelopes will slip. Therefore, you should test your containers carrying different weights on one of our inclined/declined flat belts before purchasing large quantities.


Poly-V®is a registered trademark
of the Goodyear Tire & Rubber Company.
anti-snag flat belt

For the best in elastic flat belting and stretchy flat belts, insist on DuraBelt. Next Product

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