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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 564-3M-09, pitch 3M, width 9 mm, length 564 mm, 188 teeth, closed loop
ATTI • Code 039107 • CF HTD05640309
HTD timing belt 564-3M-09, pitch 3M, width 9 mm, length 564 mm, 188 teeth, closed loop
List price 13,11 € /pc.
Online 7,21 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 612-3M-09, pitch 3M, width 9 mm, length 612 mm, 204 teeth, closed loop
ATTI • Code 039108 • CF HTD06120309
HTD toothed belt 612-3M-09, pitch 3M, width 9 mm, length 612 mm, 204 teeth, closed loop
List price 14,28 € /pc.
Online 7,85 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 669-3M-09, pitch 3M, width 9 mm, length 669 mm, 223 teeth, closed loop
ATTI • Code 039109 • CF HTD06690309
HTD timing belt 669-3M-09, pitch 3M, width 9 mm, length 669 mm, 223 teeth, closed loop
List price 15,58 € /pc.
Online 8,57 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 804-3M-09, pitch 3M, width 9 mm, length 804 mm, 268 teeth, endless loop
ATTI • Code 039111 • CF HTD08040309
HTD toothed belt 804-3M-09, pitch 3M, width 9 mm, length 804 mm, 268 teeth, endless loop
List price 18,69 € /pc.
Online 10,28 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 210-3M-15, pitch 3M, width 15 mm, length 210 mm, 70 teeth, closed loop
ATTI • Code 039116 • CF HTD02100315
HTD timing belt 210-3M-15, pitch 3M, width 15 mm, length 210 mm, 70 teeth, closed loop
List price 8,66 € /pc.
Online 4,76 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 252-3M-15, pitch 3M, width 15 mm, length 252 mm, 84 teeth, closed loop
ATTI • Code 039118 • CF HTD02520315
HTD timing belt 252-3M-15, pitch 3M, width 15 mm, length 252 mm, 84 teeth, closed loop
List price 10,40 € /pc.
Online 5,72 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 255-3M-15, pitch 3M, width 15 mm, length 255 mm, 85 teeth, joined in a loop
ATTI • Code 039119 • CF HTD02550315
HTD toothed belt 255-3M-15, pitch 3M, width 15 mm, length 255 mm, 85 teeth, joined in a loop
List price 10,50 € /pc.
Online 5,78 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 285-3M-15, pitch 3M, width 15 mm, length 285 mm, 95 teeth, closed loop
ATTI • Code 039120 • CF HTD02850315
HTD timing belt 285-3M-15, pitch 3M, width 15 mm, length 285 mm, 95 teeth, closed loop
List price 11,82 € /pc.
Online 6,50 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 384-3M-15, pitch 3M, width 15 mm, length 384 mm, 128 teeth, closed loop
ATTI • Code 039121 • CF HTD03840315
HTD timing belt 384-3M-15, pitch 3M, width 15 mm, length 384 mm, 128 teeth, closed loop
List price 15,87 € /pc.
Online 8,73 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 330-3M-15, pitch 3M, width 15 mm, length 330 mm, 110 teeth, closed-loop
ATTI • Code 039122 • CF HTD03300315
HTD timing belt 330-3M-15, pitch 3M, width 15 mm, length 330 mm, 110 teeth, closed-loop
List price 13,69 € /pc.
Online 7,53 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 357-3M-15, pitch 3M, width 15 mm, length 357 mm, 119 teeth, closed loop
ATTI • Code 039123 • CF HTD03570315
HTD timing belt 357-3M-15, pitch 3M, width 15 mm, length 357 mm, 119 teeth, closed loop
List price 14,77 € /pc.
Online 8,12 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 420-3M-15, pitch 3M, width 15 mm, length 420 mm, 140 teeth, closed loop
ATTI • Code 039124 • CF HTD04200315
HTD timing belt 420-3M-15, pitch 3M, width 15 mm, length 420 mm, 140 teeth, closed loop
List price 17,41 € /pc.
Online 9,57 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 447-3M-15, pitch 3M, width 15 mm, length 447 mm, 149 teeth, closed loop
ATTI • Code 039125 • CF HTD04470315
HTD timing belt 447-3M-15, pitch 3M, width 15 mm, length 447 mm, 149 teeth, closed loop
List price 18,50 € /pc.
Online 10,17 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 474-3M-15, pitch 3M, width 15 mm, length 474 mm, 158 teeth, closed loop
ATTI • Code 039126 • CF HTD04740315
HTD timing belt 474-3M-15, pitch 3M, width 15 mm, length 474 mm, 158 teeth, closed loop
List price 19,60 € /pc.
Online 10,78 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 513-3M-15, pitch 3M, width 15 mm, length 513 mm, 171 teeth, closed loop
ATTI • Code 039127 • CF HTD05130315
HTD timing belt 513-3M-15, pitch 3M, width 15 mm, length 513 mm, 171 teeth, closed loop
List price 21,26 € /pc.
Online 11,69 € /pc.
On Order
(Ship. 6-7 days)
HTD 564-3M-15 toothed belt, pitch 3M, width 15 mm, length 564 mm, 188 teeth, closed loop
ATTI • Code 039128 • CF HTD05640315
HTD 564-3M-15 toothed belt, pitch 3M, width 15 mm, length 564 mm, 188 teeth, closed loop
List price 21,84 € /pc.
Online 12,01 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 612-3M-15, pitch 3M, width 15 mm, length 612 mm, 204 teeth, closed loop
ATTI • Code 039129 • CF HTD06120315
HTD timing belt 612-3M-15, pitch 3M, width 15 mm, length 612 mm, 204 teeth, closed loop
List price 23,79 € /pc.
Online 13,08 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 669-3M-15, pitch 3M, width 15 mm, length 669 mm, 223 teeth, closed loop
ATTI • Code 039130 • CF HTD06690315
HTD timing belt 669-3M-15, pitch 3M, width 15 mm, length 669 mm, 223 teeth, closed loop
List price 25,97 € /pc.
Online 14,28 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 804-3M-15, pitch 3M, width 15 mm, length 804 mm, 268 teeth, closed loop
ATTI • Code 039133 • CF HTD08040315
HTD timing belt 804-3M-15, pitch 3M, width 15 mm, length 804 mm, 268 teeth, closed loop
List price 31,15 € /pc.
Online 17,13 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 225-5M-09, pitch 5M, width 9 mm, length 225 mm, 45 teeth, closed loop
ATTI • Code 039136 • CF HTD02250509
HTD belt 225-5M-09, pitch 5M, width 9 mm, length 225 mm, 45 teeth, closed loop
List price 5,18 € /pc.
Online 2,85 € /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 €