Timing belts guidance
Synchronous timing belts BAT
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The tooth profile of BAT timing belts is based on the AT tooth profile, but the teeth are crowned. The belt is thus guided and self-centred, which eliminates flanges on the pulleys and eliminates lateral drift of the belt. The belt with an arched BAT profile reduces noise. The meshing of the BAT belt is optimised.
Caution: it requires a perfect alignment of the pulleys and turns only in one direction. (For two directions of rotation, use BATK provided with a guide).
ADVANTAGES
> Self-steering: flangeless pulleys
> Very low noise level: less vibration when meshing
> Very weak polygonal effect
> Vibrations are suppressed when using support rollers or idlers on the tooth side (no minimum angle of wrap).
DISADVANTAGES
> The price
> Only works in one direction (except BATK)
> No quick-coupling system is available for this gearing.
Recommended use:
special requirements for smoothness and transmission precision
BATK synchronous timing belts
The synchronous BATK timing belt is derived from the BAT timing belt. The belt is self-guided in both directions of travel with an integrated guide.
Recommended use:
special requirements for smoothness and transmission precision
limited installation dimensions.
Application in the field of drive technology, linear and others.
SFAT synchronous timing belts
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The tooth profile of SFAT timing belts is based on the AT profile, but the two toothings are offset by half a pitch relative to each other. In combination with suitable synchronous pulleys, the belt is self-guided. It is not necessary to use flanged pulleys.
Recommended use:
running on synchronous pulleys without flanges
increased requirements for smoother running (reduction of polygonal effect)
ADVANTAGES
> Better gear quality and therefore longer service life
> Self-steering: flangeless pulleys
> Reduced noise level: the shock of the gearing is limited so the transmission is quieter
> Maximum transmissible power: the entire width of the gearing is used
> Reduced polygonal effect
> Reduced vibration: when using support rollers or rollers.
DISADVANTAGES
> Does not accept large pulley misalignments (premature wear in the centre)
> Prices
> No quick-coupling system is available for this gearing.
SAFETY PRECAUTIONS
Caution: The pulleys must be correctly aligned, otherwise the teeth will be quickly abraded in the centre by the guide.
Eagle synchronous timing belts with chevrons
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A unique timing belt concept. This unique herringbone timing belt and pulley design, called H.O.T (Helical Offset Tooth), allows for an extremely compact, quiet and high precision synchronous drive. Thanks to the chevron toothing, the use of flanges is no longer necessary, making it particularly suitable for conveying applications and reversing is possible without reservation. Eagle polyurethane timing belts are equipped as standard with steel cords and a polyamide fabric on the teeth.
ADVANTAGES
> Quieter operation compared to spur gearing
> Self-guided belt
> No flanges, therefore reduced width, total weight and inertia
> Low backlash tooth profile - ideal for high-precision movements
> Reversible operation possible.
DISADVANTAGES
> Price
> Rubbing because the teeth are at an angle. Both functions (guidance and transmission) are combined.
> Energy consumption
> Premature wear in case of misalignment of the pulleys
> There is no quick assembly system for this gearing.
GeQo Drive timing belts
GeQo Drive is an 8M belt with STD tooth form optimized for noise reduction. The teeth are offset and the tooth profile is slightly modified.
(GeQo Drive runs on STD8M pulleys with offset teeth).
The GeQo Drive is guided by the easy drive® system which allows precise operation and accepts large pulley misalignments without the use of flanges.
GeQo Drive is much quieter and more precise than a conventional belt.
Its profile made up of alternating teeth allows it to operate tangentially, which is impossible for any other timing belt.
ADVANTAGES
> Quieter operation compared to straight gearing. As quiet as an Eagle belt
> Self-guided belt
> No flanges, therefore reduced width, total weight and inertia
> Low backlash tooth profile - ideal for high-precision movements
> Reversible operation possible
> Energy consumption
> Accepts large pulley misalignment
> Can be used tangentially
GeQo Drive combines the advantages of SFAT belts and easy drive® guidance to be as quiet as Eagle belts.
Synchronous toothed belts with an insert guide
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Self-aligning belt guides are a combination of standard belts and special polyurethane V-belts with a special notched V-belt guide. These guarantee extreme flexibility and allow the use of pulleys with small diameters. The guide is fused to the belt after a groove has been milled.
ADVANTAGES
> Use with flangeless pulleys
> Unaffected by lateral pressure due to belt guidance
> Reduction of lateral belt movements
> Can be adjusted to any belt width and for all belt pitches
> Can be realized with the ERO Joint® HP quick connection system.
Applications
> Transport applications
> Handling applications
> Conveyor applications
> Positioning applications
Synchronous toothed belts with coextruded guides
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Timing belts with coextruded guide are a combination of synchronous and V-belts. The performance range corresponds to the normal T or AT profiles minus the non-toothed belt width. They perform better than toothed belts with an add-on guide (better mechanical strength, more flexible in bending, more durable).
ADVANTAGES
> Use without flange pulley
> Insensitive to lateral pressure due to belt guidance (coextruded guide belts bear the highest loads compared to other guide systems)
> Reduction of lateral belt movements
> Accepts smaller winding diameters than toothed belts with add-on guides
> Can be realized with the ERO Joint® HP quick connection system.
Applications
> Transport applications
> Handling applications
> Conveyor applications
> Positioning applications
Synchronous timing belts with easy drive® guide ring
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The Easy Drive® guide provides high directional stability for all tooth shapes, pitches and materials.
The Easy Drive® guide ring engages precisely in the pulley.
The belt no longer moves and the guidance is perfect.
ADVANTAGES
> for PU and neoprene belts
> compatible with all tooth pitches or shapes
> pulley available in any material (Steel, Aluminium, Cast iron or Delrin)
> universal solution avoiding flanged pulleys
> low vibration
> reduction of pulley width
> price comparable to a toothed belt solution with guide profile
> Realizable with ERO Joint® HP quick assembly system
easy Drive® is a registered trademark of BELTING GROUP GmbH. All rights reserved.
Pulley guide flanges:
They are used to guide the belt over the pulley teeth.
The clearance between the belt and the flanges is between 2 mm and 4 mm.
For standard belts the inside width between flanges is tolerated according to DIN ISO 2768-1 to take into account belt width tolerances and possible misalignments.
DISADVANTAGES
The flanges of the pulleys do not allow guiding over long lengths (especially in the case of conveying), so guide profiles have to be added under the belts. In the case of lateral loading and/or high loads, a guide integrated in the belt is imperative.