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Toothed Belts

Metrical pitch AT, T, HTD / Inch pitch L, XL, H, XH, XXH

The synchronous belts ensure quiet, efficient, and slip-free power transmission, thanks to the toothed profile that meshes perfectly with pulleys of the same pitch. 

They are ideal for applications requiring positioning precision, reliability, and long life even in heavy-duty working conditions. They reduce maintenance and improve energy efficiency, making them perfect for machine tools, industrial automation, handling, and any application requiring reliable and precise transmission.

Available in a wide range of versions, they include:

  • Metric T, AT, and HTD synchronous belts for high precision standard applications and high power transmissions.
  • Inch XL, L, H, XH, and XXH synchronous belts, compatible with American standard machinery (imperial pitch).
  • Reinforced options with steel or Kevlar core for superior performance.

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HTD timing belt 345-3M-06, pitch 3M, width 6 mm, length 345 mm, 115 teeth, closed loop
ATTI • Code 062266 • CF HTD03450306
HTD timing belt 345-3M-06, pitch 3M, width 6 mm, length 345 mm, 115 teeth, closed loop
List price 5,69 € /pc.
Online 3,13 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 345-3M-09, pitch 3M, width 9 mm, length 345 mm, 115 teeth, closed loop
ATTI • Code 062267 • CF HTD03450309
HTD toothed belt 345-3M-09, pitch 3M, width 9 mm, length 345 mm, 115 teeth, closed loop
List price 8,54 € /pc.
Online 4,69 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 345-3M-12, pitch 3M, width 12 mm, length 345 mm, 115 teeth, closed loop
ATTI • Code 062268 • CF HTD03450312
HTD belt 345-3M-12, pitch 3M, width 12 mm, length 345 mm, 115 teeth, closed loop
List price 11,39 € /pc.
Online 6,27 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 345-3M-15, pitch 3M, width 15 mm, length 345 mm, 115 teeth, closed loop
ATTI • Code 062269 • CF HTD03450315
HTD timing belt 345-3M-15, pitch 3M, width 15 mm, length 345 mm, 115 teeth, closed loop
List price 14,23 € /pc.
Online 7,83 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 357-3M-03, pitch 3M, width 3 mm, length 357 mm, 119 teeth, closed loop
ATTI • Code 062270 • CF HTD03570303
HTD timing belt 357-3M-03, pitch 3M, width 3 mm, length 357 mm, 119 teeth, closed loop
List price 2,96 € /pc.
Online 1,63 € /pc.
On Order
(Ship. 6-7 days)
HTD 357-3M-06 timing belt, pitch 3M, width 6 mm, length 357 mm, 119 teeth, closed-loop
ATTI • Code 062271 • CF HTD03570306
HTD 357-3M-06 timing belt, pitch 3M, width 6 mm, length 357 mm, 119 teeth, closed-loop
List price 5,91 € /pc.
Online 3,25 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 357-3M-12, pitch 3M, width 12 mm, length 357 mm, 119 teeth, closed loop
ATTI • Code 062272 • CF HTD03570312
HTD toothed belt 357-3M-12, pitch 3M, width 12 mm, length 357 mm, 119 teeth, closed loop
List price 11,82 € /pc.
Online 6,50 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 363-3M-03, pitch 3M, width 3 mm, length 363 mm, 121 teeth, closed loop
ATTI • Code 062273 • CF HTD03630303
HTD toothed belt 363-3M-03, pitch 3M, width 3 mm, length 363 mm, 121 teeth, closed loop
List price 3,00 € /pc.
Online 1,65 € /pc.
On Order
(Ship. 6-7 days)
HTD 363-3M-06 toothed belt, pitch 3M, width 6 mm, length 363 mm, 121 teeth, endless loop
ATTI • Code 062274 • CF HTD03630306
HTD 363-3M-06 toothed belt, pitch 3M, width 6 mm, length 363 mm, 121 teeth, endless loop
List price 6,01 € /pc.
Online 3,30 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 363-3M-09, pitch 3M, width 9 mm, length 363 mm, 121 teeth, closed loop
ATTI • Code 062275 • CF HTD03630309
HTD belt 363-3M-09, pitch 3M, width 9 mm, length 363 mm, 121 teeth, closed loop
List price 9,00 € /pc.
Online 4,95 € /pc.
On Order
(Ship. 6-7 days)
HTD 363-3M-15 timing belt, pitch 3M, width 15 mm, length 363 mm, 121 teeth, closed loop
ATTI • Code 062276 • CF HTD03630315
HTD 363-3M-15 timing belt, pitch 3M, width 15 mm, length 363 mm, 121 teeth, closed loop
List price 15,00 € /pc.
Online 8,25 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 365-5M-09, pitch 5M, width 9 mm, length 365 mm, 73 teeth, closed loop
ATTI • Code 062277 • CF HTD03650509
HTD toothed belt 365-5M-09, pitch 5M, width 9 mm, length 365 mm, 73 teeth, closed loop
List price 8,34 € /pc.
Online 4,59 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 365-5M-15, pitch 5M, width 15 mm, length 365 mm, 73 teeth, endless loop
ATTI • Code 062278 • CF HTD03650515
HTD timing belt 365-5M-15, pitch 5M, width 15 mm, length 365 mm, 73 teeth, endless loop
List price 13,90 € /pc.
Online 7,65 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 365-5M-25, pitch 5M, width 25 mm, length 365 mm, 73 teeth, closed loop
ATTI • Code 062279 • CF HTD03650525
HTD timing belt 365-5M-25, pitch 5M, width 25 mm, length 365 mm, 73 teeth, closed loop
List price 23,18 € /pc.
Online 12,75 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 366-3M-03, pitch 3M, width 3 mm, length 366 mm, 122 teeth, closed loop
ATTI • Code 062280 • CF HTD03660303
HTD timing belt 366-3M-03, pitch 3M, width 3 mm, length 366 mm, 122 teeth, closed loop
List price 3,02 € /pc.
Online 1,66 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 366-3M-06, pitch 3M, width 6 mm, length 366 mm, 122 teeth, closed loop
ATTI • Code 062281 • CF HTD03660306
HTD timing belt 366-3M-06, pitch 3M, width 6 mm, length 366 mm, 122 teeth, closed loop
List price 6,04 € /pc.
Online 3,32 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 366-3M-09, pitch 3M, width 9 mm, length 366 mm, 122 teeth, closed loop
ATTI • Code 062282 • CF HTD03660309
HTD timing belt 366-3M-09, pitch 3M, width 9 mm, length 366 mm, 122 teeth, closed loop
List price 9,07 € /pc.
Online 4,99 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 366-3M-15, pitch 3M, width 15 mm, length 366 mm, 122 teeth, closed loop
ATTI • Code 062283 • CF HTD03660315
HTD timing belt 366-3M-15, pitch 3M, width 15 mm, length 366 mm, 122 teeth, closed loop
List price 15,10 € /pc.
Online 8,31 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 384-3M-06, pitch 3M, width 6 mm, length 384 mm, 128 teeth, closed loop
ATTI • Code 062284 • CF HTD03840306
HTD timing belt 384-3M-06, pitch 3M, width 6 mm, length 384 mm, 128 teeth, closed loop
List price 6,35 € /pc.
Online 3,49 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 384-3M-12, pitch 3M, width 12 mm, length 384 mm, 128 teeth, closed loop
ATTI • Code 062285 • CF HTD03840312
HTD timing belt 384-3M-12, pitch 3M, width 12 mm, length 384 mm, 128 teeth, closed loop
List price 12,70 € /pc.
Online 6,99 € /pc.
On Order
(Ship. 6-7 days)

Frequently asked questions

How is the code of an HTD timing belt read (e.g., 365-5M-15)?

The code of an HTD timing belt indicates the length, pitch of the teeth, and width of the belt.

Taking 365-5M-15 as an example:

  • 365: belt length in millimeters.
  • 5M: tooth pitch of 5 mm, with HTD profile.
  • 15: belt width in millimeters.

To calculate the number of teeth, simply divide the length by the pitch: 365 ÷ 5 = 73 teeth.

On shop.atti.it, ATTI offers over 4,200 timing belts, in HTD pitches of 3M, 5M, 8M, and 14M and in metric profiles.

What is the difference between HTD, T, and AT timing belts?

The HTD, T, and AT timing belts are primarily distinguished by their tooth profile and transmission characteristics.

  • HTD (3M, 5M, 8M, 14M): have rounded teeth and are particularly suitable for transmitting high torque.
  • T (T2.5, T5, T10): have trapezoidal teeth and a metric pitch. They are widely used in handling and positioning applications.
  • AT: have an enhanced trapezoidal profile compared to T belts and allow for greater force transmission at the same width.

Note: the belt and the pulley must have the same profile and the same pitch. Different types are therefore not directly interchangeable.

To choose the most suitable belt, it is important to verify the transmission characteristics and compatibility with the pulleys used.

What are the Gates Poly Chain Carbon belts and when are they used?

The Gates Poly Chain Carbon are polyurethane toothed belts with carbon fiber tensile cords, designed to transmit very high torque.

They are used in industrial applications that require robust and efficient drives and can be an alternative to traditional roller chains.

Compared to chains, they offer several advantages:

  • No lubrication is required.
  • They have a very low elongation during operation.
  • They allow the creation of drives suitable for high loads.

Caution: the Gates Poly Chain Carbon require pulleys with a dedicated profile and are not directly interchangeable with standard HTD toothed belts.

On shop.atti.it, ATTI offers over 250 codes from this range, including the Mini Poly Chain version.

Can open timing belts be purchased by the meter?

Yes. ATTI offers open timing belts by the meter in polyurethane, primarily used for linear shafts, conveyor belts, and positioning systems.

The belts can be ordered by the meter, with a minimum quantity of 5 meters.

In these applications, the ends of the belt are generally secured using special locking plates, available for the main pitches of the timing belts.

To identify the most suitable product, it is important to check the profile, pitch, and width of the belt.

Where to buy V-Belts Gates online in Italy?

On shop.atti.it, the e-commerce site of ATTI Srl, you can find V-Belts Gates from the Hi-Power and Delta Classic lines, as well as belts branded ATTI.

The catalog includes V-Belts of various types:

  • Classic sections: Z, A, B, C, D, E.
  • Narrow sections: SPZ, SPA, SPB, SPC.
  • Notched sections: AX, BX, XPZ, XPA, XPB, XPC.

On shop.atti.it, there are over 3,300 items in the V-Belts category, available for online purchase with shipping throughout Italy.

You can consult the available range in the V-Belts category.

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