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Elastic, Stretchy Flat Belting and Belts move heavy loads

  • Elastic stretchy urethane.
  • Thicknesses: .031", .063", .094", .125", .313" (.8mm, 1.6mm, 2.4mm, 3.2mm, 4mm)
  • Any width up to 35" (889mm) for .031" and .062" thick
  • Any width up 18" (457mm) for .094" and .125" thick
  • Our .313" (8mm) thick belt is .401" (10.2mm) wide and has round edges.
  • Any length above 3.5" (89mm)
  • Colors: clear .031" & .063" (.8mm & 3.2mm), black .063" (1.6mm), and orange .094" & .125" (2.4mm & 3.2mm)
  • Durometers: 83A, 85A, 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 36" (900mm) 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 36" (914mm) 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

Our flat belts typically work well on inclines and declines of up to 12 degrees. In some cases, depending upon box weight and bottom surface, they work up to 16 degrees. By using two orange cleats per belt (i.e., square belts or inverted V-belts fused to the black belts) and offsetting one end of the sloped zone in the frame, as in the adjacent picture, they can move boxes on inclines/declines of up to 45 degrees.
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)

Most 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 35" wide on 10" centers.

Short, wide flat belt
Short, wide flat belt

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

Our stretchy elastic flat belts will track on roller endcaps or grooves.  Specify the belt width so it extends 7/32"(7mm) beyond the edges of the roller endcap or groove edges. After the belt is stretched on the rollers, the belt edges will bend slightly over the endcap or 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). The gap between endcaps and frame can be kept constant by using felt or plastic washers. Initial belt tension should be 80 lbs. When the belt covers the rollers from edge to edge, installation may appear difficult, but it is much easier than it looks. Simply grasp the last roller, point its shaft into one frame hole, and insert a flat screw driver in an unused hole in the opposite frame, e.g., the hole used to skew rollers that is half way between center holes. Now press the screw drive blade against the roller edge, using the hole as a fulcrum, and snap the roller into its frame hole. It 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.
Stretchy flat belt tracks on roller endcaps
Stretchy flat belt tracks on roller endcaps

Elastic flat belt tracks on roller grooves
Elastic flat belt tracks on roller grooves

Anti-Snag Flat Belts

  • Helps prevent boxes from dislodging belts.
  • Matte side has a lower coefficient of friction (COF) in most applications, but has a higher COF on paper envelopes.
  • Shiny side has high coefficient of friction, which
    makes it slip-resistant or non-slip urethane belting.

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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