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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 3850-14M-170, pitch 14M, width 170 mm, length 3850 mm, 275 teeth, closed loop
ATTI • Code 039390 • CF HTD385014170
HTD timing belt 3850-14M-170, pitch 14M, width 170 mm, length 3850 mm, 275 teeth, closed loop
List price 1.775,81 € /pc.
Online 976,70 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4326-14M-40, pitch 14M, width 40 mm, length 4326 mm, 309 teeth, closed loop
ATTI • Code 039391 • CF HTD43261440
HTD timing belt 4326-14M-40, pitch 14M, width 40 mm, length 4326 mm, 309 teeth, closed loop
List price 469,64 € /pc.
Online 258,30 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 4326-14M-55, pitch 14M, width 55 mm, length 4326 mm, 309 teeth, closed loop
ATTI • Code 039392 • CF HTD43261455
HTD belt 4326-14M-55, pitch 14M, width 55 mm, length 4326 mm, 309 teeth, closed loop
List price 645,77 € /pc.
Online 355,17 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4326-14M-85, pitch 14M, width 85 mm, length 4326 mm, 309 teeth, closed loop
ATTI • Code 039393 • CF HTD43261485
HTD timing belt 4326-14M-85, pitch 14M, width 85 mm, length 4326 mm, 309 teeth, closed loop
List price 997,99 € /pc.
Online 548,90 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 4326-14M-115, pitch 14M, width 115 mm, length 4326 mm, 309 teeth, closed loop
ATTI • Code 039394 • CF HTD432614115
HTD belt 4326-14M-115, pitch 14M, width 115 mm, length 4326 mm, 309 teeth, closed loop
List price 1.350,23 € /pc.
Online 742,63 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4326-14M-170, pitch 14M, width 170 mm, length 4326 mm, 309 teeth, closed loop
ATTI • Code 039395 • CF HTD432614170
HTD timing belt 4326-14M-170, pitch 14M, width 170 mm, length 4326 mm, 309 teeth, closed loop
List price 1.995,99 € /pc.
Online 1.097,79 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4578-14M-40, pitch 14M, width 40 mm, length 4578 mm, 327 teeth, closed loop
ATTI • Code 039396 • CF HTD45781440
HTD timing belt 4578-14M-40, pitch 14M, width 40 mm, length 4578 mm, 327 teeth, closed loop
List price 497,06 € /pc.
Online 273,39 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4578-14M-55, pitch 14M, width 55 mm, length 4578 mm, 327 teeth, closed loop
ATTI • Code 039397 • CF HTD45781455
HTD timing belt 4578-14M-55, pitch 14M, width 55 mm, length 4578 mm, 327 teeth, closed loop
List price 683,47 € /pc.
Online 375,91 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 4578-14M-85, pitch 14M, width 85 mm, length 4578 mm, 327 teeth, closed loop
ATTI • Code 039398 • CF HTD45781485
HTD belt 4578-14M-85, pitch 14M, width 85 mm, length 4578 mm, 327 teeth, closed loop
List price 1.056,28 € /pc.
Online 580,96 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 4578-14M-115, pitch 14M, width 115 mm, length 4578 mm, 327 teeth, closed loop
ATTI • Code 039399 • CF HTD457814115
HTD toothed belt 4578-14M-115, pitch 14M, width 115 mm, length 4578 mm, 327 teeth, closed loop
List price 1.429,08 € /pc.
Online 785,99 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 4578-14M-170, pitch 14M, width 170 mm, length 4578 mm, 327 teeth, closed loop
ATTI • Code 039400 • CF HTD457814170
HTD timing belt 4578-14M-170, pitch 14M, width 170 mm, length 4578 mm, 327 teeth, closed loop
List price 2.112,55 € /pc.
Online 1.161,90 € /pc.
On Order
(Ship. 6-7 days)
Timing belt T2.5- 120-06, pitch 2.5, width 6 mm, development 120 mm, 48 teeth, closed loop
ATTI • Code 039401 • CF CPOT02012006
Timing belt T2.5- 120-06, pitch 2.5, width 6 mm, development 120 mm, 48 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
Timing belt T2.5- 145-06, pitch 2.5, width 6 mm, length 145 mm, 58 teeth, closed loop
ATTI • Code 039402 • CF CPOT02014506
Timing belt T2.5- 145-06, pitch 2.5, width 6 mm, length 145 mm, 58 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
Timing belt T2.5- 160-06, pitch 2.5, width 6 mm, length 160 mm, 64 teeth, closed loop
ATTI • Code 039403 • CF CPOT02016006
Timing belt T2.5- 160-06, pitch 2.5, width 6 mm, length 160 mm, 64 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
Toothed belt T2.5- 177.5-06, pitch 2.5, width 6 mm, length 177 mm, 70.8 teeth, closed loop
ATTI • Code 039404 • CF CPOT02017706
Toothed belt T2.5- 177.5-06, pitch 2.5, width 6 mm, length 177 mm, 70.8 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
Timing belt T2.5- 200-06, pitch 2.5, width 6 mm, length 200 mm, 80 teeth, closed loop
ATTI • Code 039405 • CF CPOT02020006
Timing belt T2.5- 200-06, pitch 2.5, width 6 mm, length 200 mm, 80 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
T5 timing belt - 165-10, pitch 5, width 10 mm, length 165 mm, 33 teeth, closed loop
ATTI • Code 039406 • CF CPOT05016510
T5 timing belt - 165-10, pitch 5, width 10 mm, length 165 mm, 33 teeth, closed loop
List price 15,92 € /pc.
Online 8,75 € /pc.
On Order
(Ship. 6-7 days)
Toothed belt T2.5- 230-06, pitch 2.5, width 6 mm, length 230 mm, 92 teeth, closed loop
ATTI • Code 039407 • CF CPOT02023006
Toothed belt T2.5- 230-06, pitch 2.5, width 6 mm, length 230 mm, 92 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
T2.5 timing belt - 245-06, pitch 2.5, width 6 mm, length 245 mm, 98 teeth, closed loop
ATTI • Code 039408 • CF CPOT02024506
T2.5 timing belt - 245-06, pitch 2.5, width 6 mm, length 245 mm, 98 teeth, closed loop
List price 13,74 € /pc.
Online 7,56 € /pc.
On Order
(Ship. 6-7 days)
T2.5 toothed belt - 265-06, pitch 2.5, width 6 mm, length 265 mm, 106 teeth, closed loop
ATTI • Code 039409 • CF CPOT02026506
T2.5 toothed belt - 265-06, pitch 2.5, width 6 mm, length 265 mm, 106 teeth, closed loop
List price 14,18 € /pc.
Online 7,80 € /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 €