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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 toothed belt 288-3M-09, pitch 3M, width 9 mm, length 288 mm, 96 teeth, closed loop
ATTI • Code 062226 • CF HTD02880309
HTD toothed belt 288-3M-09, pitch 3M, width 9 mm, length 288 mm, 96 teeth, closed loop
List price 7,16 € /pc.
Online 3,94 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 288-3M-15, pitch 3M, width 15 mm, length 288 mm, 96 teeth, endless loop
ATTI • Code 062227 • CF HTD02880315
HTD timing belt 288-3M-15, pitch 3M, width 15 mm, length 288 mm, 96 teeth, endless loop
List price 11,94 € /pc.
Online 6,56 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 291-3M-03, pitch 3M, width 3 mm, length 291 mm, 97 teeth, closed loop
ATTI • Code 062228 • CF HTD02910303
HTD timing belt 291-3M-03, pitch 3M, width 3 mm, length 291 mm, 97 teeth, closed loop
List price 2,41 € /pc.
Online 1,32 € /pc.
On Order
(Ship. 6-7 days)
HTD 291-3M-06 timing belt, pitch 3M, width 6 mm, length 291 mm, 97 teeth, closed loop
ATTI • Code 062229 • CF HTD02910306
HTD 291-3M-06 timing belt, pitch 3M, width 6 mm, length 291 mm, 97 teeth, closed loop
List price 4,82 € /pc.
Online 2,65 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 291-3M-09, pitch 3M, width 9 mm, length 291 mm, 97 teeth, closed loop
ATTI • Code 062230 • CF HTD02910309
HTD timing belt 291-3M-09, pitch 3M, width 9 mm, length 291 mm, 97 teeth, closed loop
List price 7,22 € /pc.
Online 3,97 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 291-3M-15, pitch 3M, width 15 mm, length 291 mm, 97 teeth, closed loop
ATTI • Code 062231 • CF HTD02910315
HTD toothed belt 291-3M-15, pitch 3M, width 15 mm, length 291 mm, 97 teeth, closed loop
List price 12,04 € /pc.
Online 6,62 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 297-3M-06, pitch 3M, width 6 mm, length 297 mm, 99 teeth, closed loop
ATTI • Code 062232 • CF HTD02970306
HTD toothed belt 297-3M-06, pitch 3M, width 6 mm, length 297 mm, 99 teeth, closed loop
List price 4,92 € /pc.
Online 2,70 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 297-3M-09, pitch 3M, width 9 mm, length 297 mm, 99 teeth, closed loop
ATTI • Code 062233 • CF HTD02970309
HTD toothed belt 297-3M-09, pitch 3M, width 9 mm, length 297 mm, 99 teeth, closed loop
List price 7,35 € /pc.
Online 4,04 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 297-3M-12, pitch 3M, width 12 mm, length 297 mm, 99 teeth, closed loop
ATTI • Code 062234 • CF HTD02970312
HTD timing belt 297-3M-12, pitch 3M, width 12 mm, length 297 mm, 99 teeth, closed loop
List price 9,81 € /pc.
Online 5,39 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 297-3M-15, pitch 3M, width 15 mm, length 297 mm, 99 teeth, closed loop
ATTI • Code 062235 • CF HTD02970315
HTD timing belt 297-3M-15, pitch 3M, width 15 mm, length 297 mm, 99 teeth, closed loop
List price 12,26 € /pc.
Online 6,74 € /pc.
On Order
(Ship. 6-7 days)
HTD 300-3M-06 toothed belt, pitch 3M, width 6 mm, length 300 mm, 100 teeth, closed loop
ATTI • Code 062236 • CF HTD03000306
HTD 300-3M-06 toothed belt, pitch 3M, width 6 mm, length 300 mm, 100 teeth, closed loop
List price 4,94 € /pc.
Online 2,72 € /pc.
On Order
(Ship. 6-7 days)
HTD 300-3M-12 toothed belt, pitch 3M, width 12 mm, length 300 mm, 100 teeth, closed loop
ATTI • Code 062237 • CF HTD03000312
HTD 300-3M-12 toothed belt, pitch 3M, width 12 mm, length 300 mm, 100 teeth, closed loop
List price 9,90 € /pc.
Online 5,45 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 309-3M-06, pitch 3M, width 6 mm, length 309 mm, 103 teeth, endless loop
ATTI • Code 062238 • CF HTD03090306
HTD timing belt 309-3M-06, pitch 3M, width 6 mm, length 309 mm, 103 teeth, endless loop
List price 5,12 € /pc.
Online 2,82 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 309-3M-09, pitch 3M, width 9 mm, length 309 mm, 103 teeth, closed loop
ATTI • Code 062239 • CF HTD03090309
HTD timing belt 309-3M-09, pitch 3M, width 9 mm, length 309 mm, 103 teeth, closed loop
List price 7,69 € /pc.
Online 4,23 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 309-3M-12, pitch 3M, width 12 mm, length 309 mm, 103 teeth, closed loop
ATTI • Code 062240 • CF HTD03090312
HTD timing belt 309-3M-12, pitch 3M, width 12 mm, length 309 mm, 103 teeth, closed loop
List price 10,25 € /pc.
Online 5,64 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 309-3M-15, pitch 3M, width 15 mm, length 309 mm, 103 teeth, closed loop
ATTI • Code 062241 • CF HTD03090315
HTD timing belt 309-3M-15, pitch 3M, width 15 mm, length 309 mm, 103 teeth, closed loop
List price 12,81 € /pc.
Online 7,05 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 312-3M-03, pitch 3M, width 3 mm, length 312 mm, 104 teeth, closed loop
ATTI • Code 062242 • CF HTD03120303
HTD belt 312-3M-03, pitch 3M, width 3 mm, length 312 mm, 104 teeth, closed loop
List price 2,59 € /pc.
Online 1,43 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 312-3M-06, pitch 3M, width 6 mm, length 312 mm, 104 teeth, closed loop
ATTI • Code 062243 • CF HTD03120306
HTD toothed belt 312-3M-06, pitch 3M, width 6 mm, length 312 mm, 104 teeth, closed loop
List price 5,16 € /pc.
Online 2,84 € /pc.
On Order
(Ship. 6-7 days)
HTD 312-3M-09 timing belt, pitch 3M, width 9 mm, length 312 mm, 104 teeth, closed loop
ATTI • Code 062244 • CF HTD03120309
HTD 312-3M-09 timing belt, pitch 3M, width 9 mm, length 312 mm, 104 teeth, closed loop
List price 7,75 € /pc.
Online 4,26 € /pc.
On Order
(Ship. 6-7 days)
HTD 312-3M-12 toothed belt, pitch 3M, width 12 mm, length 312 mm, 104 teeth, closed loop
ATTI • Code 062245 • CF HTD03120312
HTD 312-3M-12 toothed belt, pitch 3M, width 12 mm, length 312 mm, 104 teeth, closed loop
List price 10,34 € /pc.
Online 5,69 € /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 €