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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 531-3M-03, pitch 3M, width 3 mm, length 531 mm, 177 teeth, closed loop
ATTI • Code 062346 • CF HTD05310303
HTD timing belt 531-3M-03, pitch 3M, width 3 mm, length 531 mm, 177 teeth, closed loop
List price 4,30 € /pc.
Online 2,37 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 531-3M-06, pitch 3M, width 6 mm, length 531 mm, 177 teeth, joined in a loop
ATTI • Code 062347 • CF HTD05310306
HTD timing belt 531-3M-06, pitch 3M, width 6 mm, length 531 mm, 177 teeth, joined in a loop
List price 8,60 € /pc.
Online 4,73 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 531-3M-09, pitch 3M, width 9 mm, length 531 mm, 177 teeth, closed loop
ATTI • Code 062348 • CF HTD05310309
HTD belt 531-3M-09, pitch 3M, width 9 mm, length 531 mm, 177 teeth, closed loop
List price 12,90 € /pc.
Online 7,10 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 531-3M-12, pitch 3M, width 12 mm, length 531 mm, 177 teeth, closed loop
ATTI • Code 062349 • CF HTD05310312
HTD timing belt 531-3M-12, pitch 3M, width 12 mm, length 531 mm, 177 teeth, closed loop
List price 17,19 € /pc.
Online 9,46 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 531-3M-15, pitch 3M, width 15 mm, length 531 mm, 177 teeth, endless loop
ATTI • Code 062350 • CF HTD05310315
HTD timing belt 531-3M-15, pitch 3M, width 15 mm, length 531 mm, 177 teeth, endless loop
List price 21,49 € /pc.
Online 11,82 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 537-3M-03, pitch 3M, width 3 mm, length 537 mm, 179 teeth, closed loop
ATTI • Code 062351 • CF HTD05370303
HTD timing belt 537-3M-03, pitch 3M, width 3 mm, length 537 mm, 179 teeth, closed loop
List price 4,32 € /pc.
Online 2,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 537-3M-06, pitch 3M, width 6 mm, length 537 mm, 179 teeth, closed loop
ATTI • Code 062352 • CF HTD05370306
HTD timing belt 537-3M-06, pitch 3M, width 6 mm, length 537 mm, 179 teeth, closed loop
List price 8,64 € /pc.
Online 4,75 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 537-3M-09, pitch 3M, width 9 mm, length 537 mm, 179 teeth, closed loop
ATTI • Code 062353 • CF HTD05370309
HTD toothed belt 537-3M-09, pitch 3M, width 9 mm, length 537 mm, 179 teeth, closed loop
List price 12,96 € /pc.
Online 7,13 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 537-3M-12, pitch 3M, width 12 mm, length 537 mm, 179 teeth, endless loop
ATTI • Code 062354 • CF HTD05370312
HTD toothed belt 537-3M-12, pitch 3M, width 12 mm, length 537 mm, 179 teeth, endless loop
List price 17,29 € /pc.
Online 9,51 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 537-3M-15, pitch 3M, width 15 mm, length 537 mm, 179 teeth, endless
ATTI • Code 062355 • CF HTD05370315
HTD timing belt 537-3M-15, pitch 3M, width 15 mm, length 537 mm, 179 teeth, endless
List price 21,60 € /pc.
Online 11,88 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 544-8M-20, pitch 8M, width 20 mm, length 550 mm, 68.75 teeth, endless
ATTI • Code 062356 • CF HTD05440820
HTD timing belt 544-8M-20, pitch 8M, width 20 mm, length 550 mm, 68.75 teeth, endless
List price 21,74 € /pc.
Online 11,96 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 558-3M-06, pitch 3M, width 6 mm, length 558 mm, 186 teeth, closed loop
ATTI • Code 062357 • CF HTD05580306
HTD timing belt 558-3M-06, pitch 3M, width 6 mm, length 558 mm, 186 teeth, closed loop
List price 8,68 € /pc.
Online 4,78 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 558-3M-09, 3M pitch, 9 mm width, 558 mm length, 186 teeth, closed loop
ATTI • Code 062358 • CF HTD05580309
HTD timing belt 558-3M-09, 3M pitch, 9 mm width, 558 mm length, 186 teeth, closed loop
List price 13,04 € /pc.
Online 7,17 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 558-3M-12, pitch 3M, width 12 mm, length 558 mm, 186 teeth, closed loop
ATTI • Code 062359 • CF HTD05580312
HTD timing belt 558-3M-12, pitch 3M, width 12 mm, length 558 mm, 186 teeth, closed loop
List price 17,38 € /pc.
Online 9,56 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 564-3M-06, pitch 3M, width 6 mm, length 564 mm, 188 teeth, endless loop
ATTI • Code 062360 • CF HTD05640306
HTD timing belt 564-3M-06, pitch 3M, width 6 mm, length 564 mm, 188 teeth, endless loop
List price 8,74 € /pc.
Online 4,80 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 564-3M-12, pitch 3M, width 12 mm, length 564 mm, 188 teeth, closed loop
ATTI • Code 062361 • CF HTD05640312
HTD timing belt 564-3M-12, pitch 3M, width 12 mm, length 564 mm, 188 teeth, closed loop
List price 17,47 € /pc.
Online 9,61 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 576-8M-20, pitch 8M, width 20 mm, length 576 mm, 72 teeth, closed loop
ATTI • Code 062362 • CF HTD05760820
HTD timing belt 576-8M-20, pitch 8M, width 20 mm, length 576 mm, 72 teeth, closed loop
List price 23,10 € /pc.
Online 12,71 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 576-8M-30, pitch 8M, width 30 mm, length 576 mm, 72 teeth, closed loop
ATTI • Code 062363 • CF HTD05760830
HTD timing belt 576-8M-30, pitch 8M, width 30 mm, length 576 mm, 72 teeth, closed loop
List price 34,64 € /pc.
Online 19,05 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 597-3M-03, pitch 3M, width 3 mm, length 597 mm, 199 teeth, closed loop
ATTI • Code 062364 • CF HTD05970303
HTD timing belt 597-3M-03, pitch 3M, width 3 mm, length 597 mm, 199 teeth, closed loop
List price 4,62 € /pc.
Online 2,54 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 597-3M-06, pitch 3M, width 6 mm, length 597 mm, 199 teeth, closed loop
ATTI • Code 062365 • CF HTD05970306
HTD timing belt 597-3M-06, pitch 3M, width 6 mm, length 597 mm, 199 teeth, closed loop
List price 9,24 € /pc.
Online 5,08 € /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 €