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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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T5 timing belt - 215-10, pitch 5, width 10 mm, length 215 mm, 43 teeth, endless loop
ATTI • Code 039432 • CF CPOT05021510
T5 timing belt - 215-10, pitch 5, width 10 mm, length 215 mm, 43 teeth, endless loop
List price 16,18 € /pc.
Online 8,90 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 215-16, pitch 5, width 16 mm, length 215 mm, 43 teeth, closed loop
ATTI • Code 039433 • CF CPOT05021516
T5 timing belt - 215-16, pitch 5, width 16 mm, length 215 mm, 43 teeth, closed loop
List price 25,90 € /pc.
Online 14,25 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 215-25, pitch 5, width 25 mm, length 215 mm, 43 teeth, closed loop
ATTI • Code 039434 • CF CPOT05021525
T5 timing belt - 215-25, pitch 5, width 25 mm, length 215 mm, 43 teeth, closed loop
List price 40,46 € /pc.
Online 22,26 € /pc.
On Order
(Ship. 6-7 days)
Toothed belt T5- 220-10, pitch 5, width 10 mm, length 220 mm, 44 teeth, closed loop
ATTI • Code 039435 • CF CPOT05022010
Toothed belt T5- 220-10, pitch 5, width 10 mm, length 220 mm, 44 teeth, closed loop
List price 16,18 € /pc.
Online 8,90 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 220-16, pitch 5, width 16 mm, length 220 mm, 44 teeth, closed loop
ATTI • Code 039436 • CF CPOT05022016
T5 timing belt - 220-16, pitch 5, width 16 mm, length 220 mm, 44 teeth, closed loop
List price 25,90 € /pc.
Online 14,25 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 220-25, pitch 5, width 25 mm, length 220 mm, 44 teeth, closed loop
ATTI • Code 039437 • CF CPOT05022025
T5 toothed belt - 220-25, pitch 5, width 25 mm, length 220 mm, 44 teeth, closed loop
List price 40,46 € /pc.
Online 22,26 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 225-16, pitch 5, width 16 mm, length 225 mm, 45 teeth, closed loop
ATTI • Code 039439 • CF CPOT05022516
T5 toothed belt - 225-16, pitch 5, width 16 mm, length 225 mm, 45 teeth, closed loop
List price 26,34 € /pc.
Online 14,49 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 225-25, pitch 5, width 25 mm, length 225 mm, 45 teeth, closed loop
ATTI • Code 039440 • CF CPOT05022525
T5 toothed belt - 225-25, pitch 5, width 25 mm, length 225 mm, 45 teeth, closed loop
List price 41,14 € /pc.
Online 22,63 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 245-10, pitch 5, width 10 mm, length 245 mm, 49 teeth, closed loop
ATTI • Code 039441 • CF CPOT05024510
T5 timing belt - 245-10, pitch 5, width 10 mm, length 245 mm, 49 teeth, closed loop
List price 16,46 € /pc.
Online 9,05 € /pc.
On Order
(Ship. 6-7 days)
T5-245-16 toothed belt, pitch 5, width 16 mm, length 245 mm, 49 teeth, closed loop
ATTI • Code 039442 • CF CPOT05024516
T5-245-16 toothed belt, pitch 5, width 16 mm, length 245 mm, 49 teeth, closed loop
List price 26,34 € /pc.
Online 14,49 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 245-25, pitch 5, width 25 mm, development 245 mm, 49 teeth, closed loop
ATTI • Code 039443 • CF CPOT05024525
T5 toothed belt - 245-25, pitch 5, width 25 mm, development 245 mm, 49 teeth, closed loop
List price 41,14 € /pc.
Online 22,63 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 255-10, pitch 5, width 10 mm, length 255 mm, 51 teeth, closed loop
ATTI • Code 039444 • CF CPOT05025510
T5 timing belt - 255-10, pitch 5, width 10 mm, length 255 mm, 51 teeth, closed loop
List price 16,64 € /pc.
Online 9,15 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 255-16, pitch 5, width 16 mm, length 255 mm, 51 teeth, closed loop
ATTI • Code 039445 • CF CPOT05025516
T5 toothed belt - 255-16, pitch 5, width 16 mm, length 255 mm, 51 teeth, closed loop
List price 26,62 € /pc.
Online 14,64 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 255-25, pitch 5, width 25 mm, length 255 mm, 51 teeth, closed loop
ATTI • Code 039446 • CF CPOT05025525
T5 timing belt - 255-25, pitch 5, width 25 mm, length 255 mm, 51 teeth, closed loop
List price 41,62 € /pc.
Online 22,89 € /pc.
On Order
(Ship. 6-7 days)
Timing belt T10- 260-16, pitch 10, width 16 mm, length 260 mm, 26 teeth, closed loop
ATTI • Code 039447 • CF CPOT10026016
Timing belt T10- 260-16, pitch 10, width 16 mm, length 260 mm, 26 teeth, closed loop
List price 34,97 € /pc.
Online 19,23 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 260-16, pitch 5, width 16 mm, length 260 mm, 52 teeth, closed loop
ATTI • Code 039448 • CF CPOT05026016
T5 timing belt - 260-16, pitch 5, width 16 mm, length 260 mm, 52 teeth, closed loop
List price 26,62 € /pc.
Online 14,64 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 260-25, pitch 5, width 25 mm, length 260 mm, 52 teeth, closed loop
ATTI • Code 039449 • CF CPOT05026025
T5 timing belt - 260-25, pitch 5, width 25 mm, length 260 mm, 52 teeth, closed loop
List price 41,62 € /pc.
Online 22,89 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 270-10, pitch 5, width 10 mm, length 270 mm, 54 teeth, closed loop
ATTI • Code 039450 • CF CPOT05027010
T5 timing belt - 270-10, pitch 5, width 10 mm, length 270 mm, 54 teeth, closed loop
List price 16,74 € /pc.
Online 9,21 € /pc.
On Order
(Ship. 6-7 days)
T5 toothed belt - 270-16, pitch 5, width 16 mm, length 270 mm, 54 teeth, closed loop
ATTI • Code 039451 • CF CPOT05027016
T5 toothed belt - 270-16, pitch 5, width 16 mm, length 270 mm, 54 teeth, closed loop
List price 26,78 € /pc.
Online 14,73 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 280 - 10, pitch 5, width 10 mm, length 280 mm, 56 teeth, closed loop
ATTI • Code 039453 • CF CPOT05028010
T5 timing belt - 280 - 10, pitch 5, width 10 mm, length 280 mm, 56 teeth, closed loop
List price 16,74 € /pc.
Online 9,21 € /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 €