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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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AT5 timing belt - 300-10, pitch 5, width 10 mm, length 300 mm, 60 teeth, closed loop
ATTI • Code 040070 • CF CPOAT05030010
AT5 timing belt - 300-10, pitch 5, width 10 mm, length 300 mm, 60 teeth, closed loop
List price 20,30 € /pc.
Online 11,17 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 300-16, pitch 5, width 16 mm, circumference 300 mm, 60 teeth, closed loop
ATTI • Code 040071 • CF CPOAT05030016
AT5 toothed belt - 300-16, pitch 5, width 16 mm, circumference 300 mm, 60 teeth, closed loop
List price 32,48 € /pc.
Online 17,86 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 300-25, pitch 5, width 25 mm, development 300 mm, 60 teeth, closed loop
ATTI • Code 040072 • CF CPOAT05030025
AT5 toothed belt - 300-25, pitch 5, width 25 mm, development 300 mm, 60 teeth, closed loop
List price 50,76 € /pc.
Online 27,92 € /pc.
On Order
(Ship. 6-7 days)
AT5 timing belt - 340-10, pitch 5, width 10 mm, development 340 mm, 68 teeth, closed loop
ATTI • Code 040073 • CF CPOAT05034010
AT5 timing belt - 340-10, pitch 5, width 10 mm, development 340 mm, 68 teeth, closed loop
List price 21,49 € /pc.
Online 11,82 € /pc.
On Order
(Ship. 6-7 days)
AT5 timing belt - 340-16, pitch 5, width 16 mm, length 340 mm, 68 teeth, closed loop
ATTI • Code 040074 • CF CPOAT05034016
AT5 timing belt - 340-16, pitch 5, width 16 mm, length 340 mm, 68 teeth, closed loop
List price 34,40 € /pc.
Online 18,92 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 340-25, pitch 5, width 25 mm, length 340 mm, 68 teeth, closed loop
ATTI • Code 040075 • CF CPOAT05034025
AT5 toothed belt - 340-25, pitch 5, width 25 mm, length 340 mm, 68 teeth, closed loop
List price 53,74 € /pc.
Online 29,55 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 375-10, pitch 5, width 10 mm, length 375 mm, 75 teeth, closed loop
ATTI • Code 040076 • CF CPOAT05037510
AT5 toothed belt - 375-10, pitch 5, width 10 mm, length 375 mm, 75 teeth, closed loop
List price 21,86 € /pc.
Online 12,02 € /pc.
On Order
(Ship. 6-7 days)
AT5 timing belt - 375-16, pitch 5, width 16 mm, length 375 mm, 75 teeth, closed loop
ATTI • Code 040077 • CF CPOAT05037516
AT5 timing belt - 375-16, pitch 5, width 16 mm, length 375 mm, 75 teeth, closed loop
List price 34,97 € /pc.
Online 19,23 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 375-25, pitch 5, width 25 mm, length 375 mm, 75 teeth, closed loop
ATTI • Code 040078 • CF CPOAT05037525
AT5 toothed belt - 375-25, pitch 5, width 25 mm, length 375 mm, 75 teeth, closed loop
List price 54,64 € /pc.
Online 30,05 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 390-10, pitch 5, width 10 mm, length 390 mm, 78 teeth, closed loop
ATTI • Code 040079 • CF CPOAT05039010
AT5 toothed belt - 390-10, pitch 5, width 10 mm, length 390 mm, 78 teeth, closed loop
List price 22,22 € /pc.
Online 12,22 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 390-16, pitch 5, width 16 mm, length 390 mm, 78 teeth, closed loop
ATTI • Code 040080 • CF CPOAT05039016
AT5 toothed belt - 390-16, pitch 5, width 16 mm, length 390 mm, 78 teeth, closed loop
List price 35,56 € /pc.
Online 19,56 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 390-25, pitch 5, width 25 mm, length 390 mm, 78 teeth, closed loop
ATTI • Code 040081 • CF CPOAT05039025
AT5 toothed belt - 390-25, pitch 5, width 25 mm, length 390 mm, 78 teeth, closed loop
List price 55,55 € /pc.
Online 30,55 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 420-10, pitch 5, width 10 mm, length 420 mm, 84 teeth, closed loop
ATTI • Code 040082 • CF CPOAT05042010
AT5 toothed belt - 420-10, pitch 5, width 10 mm, length 420 mm, 84 teeth, closed loop
List price 23,32 € /pc.
Online 12,83 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 420-16, pitch 5, width 16 mm, length 420 mm, 84 teeth, closed loop
ATTI • Code 040083 • CF CPOAT05042016
AT5 toothed belt - 420-16, pitch 5, width 16 mm, length 420 mm, 84 teeth, closed loop
List price 37,32 € /pc.
Online 20,52 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 420-25, pitch 5, width 25 mm, development 420 mm, 84 teeth, closed loop
ATTI • Code 040084 • CF CPOAT05042025
AT5 toothed belt - 420-25, pitch 5, width 25 mm, development 420 mm, 84 teeth, closed loop
List price 58,30 € /pc.
Online 32,07 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 455-10, pitch 5, width 10 mm, length 455 mm, 91 teeth, closed loop
ATTI • Code 040085 • CF CPOAT05045510
AT5 toothed belt - 455-10, pitch 5, width 10 mm, length 455 mm, 91 teeth, closed loop
List price 23,88 € /pc.
Online 13,13 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 455-16, pitch 5, width 16 mm, length 455 mm, 91 teeth, closed loop
ATTI • Code 040086 • CF CPOAT05045516
AT5 toothed belt - 455-16, pitch 5, width 16 mm, length 455 mm, 91 teeth, closed loop
List price 38,18 € /pc.
Online 21,00 € /pc.
On Order
(Ship. 6-7 days)
AT5 timing belt - 455-25, pitch 5, width 25 mm, length 455 mm, 91 teeth, closed loop
ATTI • Code 040087 • CF CPOAT05045525
AT5 timing belt - 455-25, pitch 5, width 25 mm, length 455 mm, 91 teeth, closed loop
List price 59,67 € /pc.
Online 32,82 € /pc.
On Order
(Ship. 6-7 days)
AT5 toothed belt - 500-10, pitch 5, width 10 mm, length 500 mm, 100 teeth, closed loop
ATTI • Code 040088 • CF CPOAT05050010
AT5 toothed belt - 500-10, pitch 5, width 10 mm, length 500 mm, 100 teeth, closed loop
List price 24,50 € /pc.
Online 13,48 € /pc.
On Order
(Ship. 6-7 days)
AT5 timing belt - 500-16, pitch 5, width 16 mm, length 500 mm, 100 teeth, closed loop
ATTI • Code 040089 • CF CPOAT05050016
AT5 timing belt - 500-16, pitch 5, width 16 mm, length 500 mm, 100 teeth, closed loop
List price 39,22 € /pc.
Online 21,57 € /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 €