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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 495-3M-15, pitch 3M, width 15 mm, length 495 mm, 165 teeth, closed loop
ATTI • Code 062326 • CF HTD04950315
HTD timing belt 495-3M-15, pitch 3M, width 15 mm, length 495 mm, 165 teeth, closed loop
List price 20,63 € /pc.
Online 11,35 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 501-3M-06, pitch 3M, width 6 mm, length 501 mm, 167 teeth, closed loop
ATTI • Code 062327 • CF HTD05010306
HTD toothed belt 501-3M-06, pitch 3M, width 6 mm, length 501 mm, 167 teeth, closed loop
List price 8,30 € /pc.
Online 4,57 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 501-3M-09, pitch 3M, width 9 mm, length 501 mm, 167 teeth, closed loop
ATTI • Code 062328 • CF HTD05010309
HTD toothed belt 501-3M-09, pitch 3M, width 9 mm, length 501 mm, 167 teeth, closed loop
List price 12,45 € /pc.
Online 6,85 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 501-3M-12, pitch 3M, width 12 mm, length 501 mm, 167 teeth, closed loop
ATTI • Code 062329 • CF HTD05010312
HTD belt 501-3M-12, pitch 3M, width 12 mm, length 501 mm, 167 teeth, closed loop
List price 16,60 € /pc.
Online 9,13 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 501-3M-15, pitch 3M, width 15 mm, length 501 mm, 167 teeth, closed loop
ATTI • Code 062330 • CF HTD05010315
HTD timing belt 501-3M-15, pitch 3M, width 15 mm, length 501 mm, 167 teeth, closed loop
List price 20,75 € /pc.
Online 11,41 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 512-8M-20, pitch 8M, width 20 mm, length 512 mm, 64 teeth, closed loop
ATTI • Code 062331 • CF HTD05120820
HTD timing belt 512-8M-20, pitch 8M, width 20 mm, length 512 mm, 64 teeth, closed loop
List price 20,40 € /pc.
Online 11,22 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 512-8M-50, pitch 8M, width 50 mm, length 512 mm, 64 teeth, closed loop
ATTI • Code 062332 • CF HTD05120850
HTD timing belt 512-8M-50, pitch 8M, width 50 mm, length 512 mm, 64 teeth, closed loop
List price 51,00 € /pc.
Online 28,05 € /pc.
On Order
(Ship. 6-7 days)
HTD 513-3M-03 timing belt, pitch 3M, width 3 mm, length 513 mm, 171 teeth, closed loop
ATTI • Code 062333 • CF HTD05130303
HTD 513-3M-03 timing belt, pitch 3M, width 3 mm, length 513 mm, 171 teeth, closed loop
List price 4,26 € /pc.
Online 2,34 € /pc.
On Order
(Ship. 6-7 days)
HTD 513-3M-06 toothed belt, pitch 3M, width 6 mm, length 513 mm, 171 teeth, closed loop
ATTI • Code 062334 • CF HTD05130306
HTD 513-3M-06 toothed belt, pitch 3M, width 6 mm, length 513 mm, 171 teeth, closed loop
List price 8,50 € /pc.
Online 4,68 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 513-3M-12, pitch 3M, width 12 mm, length 513 mm, 171 teeth, endless loop
ATTI • Code 062335 • CF HTD05130312
HTD timing belt 513-3M-12, pitch 3M, width 12 mm, length 513 mm, 171 teeth, endless loop
List price 17,01 € /pc.
Online 9,36 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 520-5M-09, pitch 5M, width 9 mm, length 520 mm, 104 teeth, closed loop
ATTI • Code 062336 • CF HTD05200509
HTD timing belt 520-5M-09, pitch 5M, width 9 mm, length 520 mm, 104 teeth, closed loop
List price 11,60 € /pc.
Online 6,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 520-5M-15, pitch 5M, width 15 mm, length 520 mm, 104 teeth, closed loop
ATTI • Code 062337 • CF HTD05200515
HTD timing belt 520-5M-15, pitch 5M, width 15 mm, length 520 mm, 104 teeth, closed loop
List price 19,32 € /pc.
Online 10,62 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 520-5M-25, pitch 5M, width 25 mm, length 520 mm, 104 teeth, closed loop
ATTI • Code 062338 • CF HTD05200525
HTD toothed belt 520-5M-25, pitch 5M, width 25 mm, length 520 mm, 104 teeth, closed loop
List price 32,21 € /pc.
Online 17,72 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 520-8M-20, pitch 8M, width 20 mm, length 520 mm, 65 teeth, closed loop
ATTI • Code 062339 • CF HTD05200820
HTD timing belt 520-8M-20, pitch 8M, width 20 mm, length 520 mm, 65 teeth, closed loop
List price 20,70 € /pc.
Online 11,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 520-8M-30, pitch 8M, width 30 mm, length 520 mm, 65 teeth, closed loop
ATTI • Code 062340 • CF HTD05200830
HTD timing belt 520-8M-30, pitch 8M, width 30 mm, length 520 mm, 65 teeth, closed loop
List price 31,05 € /pc.
Online 17,08 € /pc.
On Order
(Ship. 6-7 days)
HTD 522-3M-03 toothed belt, pitch 3M, width 3 mm, length 522 mm, 174 teeth, closed loop
ATTI • Code 062341 • CF HTD05220303
HTD 522-3M-03 toothed belt, pitch 3M, width 3 mm, length 522 mm, 174 teeth, closed loop
List price 4,27 € /pc.
Online 2,35 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 522-3M-06, pitch 3M, width 6 mm, length 522 mm, 174 teeth, closed loop
ATTI • Code 062342 • CF HTD05220306
HTD timing belt 522-3M-06, pitch 3M, width 6 mm, length 522 mm, 174 teeth, closed loop
List price 8,56 € /pc.
Online 4,71 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 522-3M-09, pitch 3M, width 9 mm, length 522 mm, 174 teeth, closed loop
ATTI • Code 062343 • CF HTD05220309
HTD timing belt 522-3M-09, pitch 3M, width 9 mm, length 522 mm, 174 teeth, closed loop
List price 12,83 € /pc.
Online 7,06 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 522-3M-12, pitch 3M, width 12 mm, length 522 mm, 174 teeth, closed loop
ATTI • Code 062344 • CF HTD05220312
HTD toothed belt 522-3M-12, pitch 3M, width 12 mm, length 522 mm, 174 teeth, closed loop
List price 17,10 € /pc.
Online 9,40 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 522-3M-15, pitch 3M, width 15 mm, length 522 mm, 174 teeth, closed loop
ATTI • Code 062345 • CF HTD05220315
HTD belt 522-3M-15, pitch 3M, width 15 mm, length 522 mm, 174 teeth, closed loop
List price 21,38 € /pc.
Online 11,76 € /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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A.T.T.I. Srl - Via f.lli Cervi 3 - 20063 Cernusco sul Naviglio (MI) - IT
P.IVA 05984490150 | Codice SDI: A4707H7 | Rea: MI-1062427 | Capitale Sociale: 100.000,00 €