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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 141-3M-09, pitch 3M, width 9 mm, length 141 mm, 47 teeth, closed loop
ATTI • Code 062106 • CF HTD01290309
HTD timing belt 141-3M-09, pitch 3M, width 9 mm, length 141 mm, 47 teeth, closed loop
List price 3,22 € /pc.
Online 1,77 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 141-3M-15, pitch 3M, width 15 mm, length 141 mm, 47 teeth, closed loop
ATTI • Code 062107 • CF HTD01410315
HTD timing belt 141-3M-15, pitch 3M, width 15 mm, length 141 mm, 47 teeth, closed loop
List price 5,80 € /pc.
Online 3,19 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 150-3M-03, pitch 3M, width 3 mm, length 150 mm, 50 teeth, closed loop
ATTI • Code 062108 • CF HTD01500303
HTD toothed belt 150-3M-03, pitch 3M, width 3 mm, length 150 mm, 50 teeth, closed loop
List price 1,25 € /pc.
Online 0,69 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 150-3M-06, pitch 3M, width 6 mm, length 150 mm, 50 teeth, closed loop
ATTI • Code 062109 • CF HTD01500306
HTD belt 150-3M-06, pitch 3M, width 6 mm, length 150 mm, 50 teeth, closed loop
List price 2,50 € /pc.
Online 1,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 150-3M-12, pitch 3M, width 12 mm, length 150 mm, 50 teeth, closed loop
ATTI • Code 062110 • CF HTD01500312
HTD timing belt 150-3M-12, pitch 3M, width 12 mm, length 150 mm, 50 teeth, closed loop
List price 4,98 € /pc.
Online 2,74 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 153-3M-03, pitch 3M, width 3 mm, length 153 mm, 51 teeth, closed loop
ATTI • Code 062111 • CF HTD01530303
HTD timing belt 153-3M-03, pitch 3M, width 3 mm, length 153 mm, 51 teeth, closed loop
List price 1,27 € /pc.
Online 0,70 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 153-3M-06, pitch 3M, width 6 mm, length 153 mm, 51 teeth, closed-loop
ATTI • Code 062112 • CF HTD01530306
HTD timing belt 153-3M-06, pitch 3M, width 6 mm, length 153 mm, 51 teeth, closed-loop
List price 2,54 € /pc.
Online 1,39 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 153-3M-09, pitch 3M, width 9 mm, length 153 mm, 51 teeth, closed loop
ATTI • Code 062113 • CF HTD01530309
HTD timing belt 153-3M-09, pitch 3M, width 9 mm, length 153 mm, 51 teeth, closed loop
List price 3,81 € /pc.
Online 2,10 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 156-3M-06, pitch 3M, width 6 mm, length 156 mm, 52 teeth, closed ring
ATTI • Code 062114 • CF HTD01560306
HTD toothed belt 156-3M-06, pitch 3M, width 6 mm, length 156 mm, 52 teeth, closed ring
List price 2,59 € /pc.
Online 1,43 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 156-3M-09, pitch 3M, width 9 mm, length 156 mm, 52 teeth, closed loop
ATTI • Code 062115 • CF HTD01560309
HTD timing belt 156-3M-09, pitch 3M, width 9 mm, length 156 mm, 52 teeth, closed loop
List price 3,88 € /pc.
Online 2,13 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 156-3M-15, pitch 3M, width 15 mm, length 156 mm, 52 teeth, closed loop
ATTI • Code 062116 • CF HTD01560315
HTD timing belt 156-3M-15, pitch 3M, width 15 mm, length 156 mm, 52 teeth, closed loop
List price 6,46 € /pc.
Online 3,55 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 159-3M-03, pitch 3M, width 3 mm, length 159 mm, 53 teeth, closed loop
ATTI • Code 062117 • CF HTD01590303
HTD timing belt 159-3M-03, pitch 3M, width 3 mm, length 159 mm, 53 teeth, closed loop
List price 1,31 € /pc.
Online 0,72 € /pc.
On Order
(Ship. 6-7 days)
HTD 159-3M-06 timing belt, pitch 3M, width 6 mm, length 159 mm, 53 teeth, closed loop
ATTI • Code 062118 • CF HTD01590306
HTD 159-3M-06 timing belt, pitch 3M, width 6 mm, length 159 mm, 53 teeth, closed loop
List price 2,63 € /pc.
Online 1,45 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 159-3M-09, pitch 3M, width 9 mm, length 159 mm, 53 teeth, closed loop
ATTI • Code 062119 • CF HTD01590309
HTD timing belt 159-3M-09, pitch 3M, width 9 mm, length 159 mm, 53 teeth, closed loop
List price 3,93 € /pc.
Online 2,16 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 159-3M-15, pitch 3M, width 15 mm, length 159 mm, 53 teeth, closed loop
ATTI • Code 062120 • CF HTD01590315
HTD toothed belt 159-3M-15, pitch 3M, width 15 mm, length 159 mm, 53 teeth, closed loop
List price 6,57 € /pc.
Online 3,61 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 162-3M-06, pitch 3M, width 6 mm, length 162 mm, 54 teeth, closed loop
ATTI • Code 062121 • CF HTD01620306
HTD timing belt 162-3M-06, pitch 3M, width 6 mm, length 162 mm, 54 teeth, closed loop
List price 2,67 € /pc.
Online 1,47 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 162-3M-09, pitch 3M, width 9 mm, length 162 mm, 54 teeth, closed loop
ATTI • Code 062122 • CF HTD01620309
HTD timing belt 162-3M-09, pitch 3M, width 9 mm, length 162 mm, 54 teeth, closed loop
List price 4,01 € /pc.
Online 2,20 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 165-3M-06, pitch 3M, width 6 mm, length 165 mm, 55 teeth, closed-loop
ATTI • Code 062123 • CF HTD01650306
HTD toothed belt 165-3M-06, pitch 3M, width 6 mm, length 165 mm, 55 teeth, closed-loop
List price 2,73 € /pc.
Online 1,50 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 168-3M-03, pitch 3M, width 3 mm, length 168 mm, 56 teeth, endless loop
ATTI • Code 062124 • CF HTD01680303
HTD timing belt 168-3M-03, pitch 3M, width 3 mm, length 168 mm, 56 teeth, endless loop
List price 1,40 € /pc.
Online 0,77 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 168-3M-06, pitch 3M, width 6 mm, length 168 mm, 56 teeth, closed loop
ATTI • Code 062125 • CF HTD01680306
HTD timing belt 168-3M-06, pitch 3M, width 6 mm, length 168 mm, 56 teeth, closed loop
List price 2,80 € /pc.
Online 1,54 € /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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