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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 447-3M-03, pitch 3M, width 3 mm, length 447 mm, 149 teeth, closed loop
ATTI • Code 062306 • CF HTD04470303
HTD timing belt 447-3M-03, pitch 3M, width 3 mm, length 447 mm, 149 teeth, closed loop
List price 3,70 € /pc.
Online 2,03 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 447-3M-06, pitch 3M, width 6 mm, length 447 mm, 149 teeth, closed loop
ATTI • Code 062307 • CF HTD04470306
HTD timing belt 447-3M-06, pitch 3M, width 6 mm, length 447 mm, 149 teeth, closed loop
List price 7,40 € /pc.
Online 4,07 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 447-3M-12, pitch 3M, width 12 mm, length 447 mm, 149 teeth, closed loop
ATTI • Code 062308 • CF HTD04470312
HTD timing belt 447-3M-12, pitch 3M, width 12 mm, length 447 mm, 149 teeth, closed loop
List price 14,80 € /pc.
Online 8,14 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 474-3M-06, pitch 3M, width 6 mm, length 474 mm, 158 teeth, closed loop
ATTI • Code 062309 • CF HTD04740306
HTD timing belt 474-3M-06, pitch 3M, width 6 mm, length 474 mm, 158 teeth, closed loop
List price 7,84 € /pc.
Online 4,31 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 474-3M-12, pitch 3M, width 12 mm, length 474 mm, 158 teeth, closed loop
ATTI • Code 062310 • CF HTD04740312
HTD timing belt 474-3M-12, pitch 3M, width 12 mm, length 474 mm, 158 teeth, closed loop
List price 15,68 € /pc.
Online 8,62 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 477-3M-03, pitch 3M, width 3 mm, length 477 mm, 159 teeth, closed loop
ATTI • Code 062311 • CF HTD04770303
HTD timing belt 477-3M-03, pitch 3M, width 3 mm, length 477 mm, 159 teeth, closed loop
List price 3,93 € /pc.
Online 2,16 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 477-3M-09, pitch 3M, width 9 mm, length 477 mm, 159 teeth, endless loop
ATTI • Code 062312 • CF HTD04770309
HTD timing belt 477-3M-09, pitch 3M, width 9 mm, length 477 mm, 159 teeth, endless loop
List price 11,82 € /pc.
Online 6,50 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 477-3M-15, pitch 3M, width 15 mm, length 477 mm, 159 teeth, closed loop
ATTI • Code 062313 • CF HTD04770315
HTD toothed belt 477-3M-15, pitch 3M, width 15 mm, length 477 mm, 159 teeth, closed loop
List price 19,71 € /pc.
Online 10,84 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 480-3M-03, pitch 3M, width 3 mm, length 480 mm, 160 teeth, closed loop
ATTI • Code 062314 • CF HTD04800303
HTD timing belt 480-3M-03, pitch 3M, width 3 mm, length 480 mm, 160 teeth, closed loop
List price 3,96 € /pc.
Online 2,18 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 480-3M-06, pitch 3M, width 6 mm, length 480 mm, 160 teeth, closed loop
ATTI • Code 062315 • CF HTD04800306
HTD timing belt 480-3M-06, pitch 3M, width 6 mm, length 480 mm, 160 teeth, closed loop
List price 7,93 € /pc.
Online 4,36 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 480-3M-09, pitch 3M, width 9 mm, development 480 mm, 160 teeth, closed loop
ATTI • Code 062316 • CF HTD04800309
HTD timing belt 480-3M-09, pitch 3M, width 9 mm, development 480 mm, 160 teeth, closed loop
List price 11,89 € /pc.
Online 6,54 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 480-3M-15, pitch 3M, width 15 mm, length 480 mm, 160 teeth, closed loop
ATTI • Code 062317 • CF HTD04800315
HTD timing belt 480-3M-15, pitch 3M, width 15 mm, length 480 mm, 160 teeth, closed loop
List price 19,80 € /pc.
Online 10,89 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 486-3M-03, pitch 3M, width 3 mm, length 486 mm, 162 teeth, closed loop
ATTI • Code 062318 • CF HTD04860303
HTD toothed belt 486-3M-03, pitch 3M, width 3 mm, length 486 mm, 162 teeth, closed loop
List price 3,98 € /pc.
Online 2,19 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 486-3M-06, pitch 3M, width 6 mm, length 486 mm, 162 teeth, closed loop
ATTI • Code 062319 • CF HTD04860306
HTD toothed belt 486-3M-06, pitch 3M, width 6 mm, length 486 mm, 162 teeth, closed loop
List price 7,97 € /pc.
Online 4,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 486-3M-09, pitch 3M, width 9 mm, length 486 mm, 162 teeth, closed loop
ATTI • Code 062320 • CF HTD04860309
HTD timing belt 486-3M-09, pitch 3M, width 9 mm, length 486 mm, 162 teeth, closed loop
List price 11,96 € /pc.
Online 6,58 € /pc.
On Order
(Ship. 6-7 days)
HTD 486-3M-15 timing belt, pitch 3M, width 15 mm, length 486 mm, 162 teeth, closed loop
ATTI • Code 062321 • CF HTD04860315
HTD 486-3M-15 timing belt, pitch 3M, width 15 mm, length 486 mm, 162 teeth, closed loop
List price 19,92 € /pc.
Online 10,96 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 495-3M-03, pitch 3M, width 3 mm, length 495 mm, 165 teeth, closed loop
ATTI • Code 062322 • CF HTD04950303
HTD belt 495-3M-03, pitch 3M, width 3 mm, length 495 mm, 165 teeth, closed loop
List price 4,13 € /pc.
Online 2,27 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 495-3M-09, pitch 3M, width 9 mm, length 495 mm, 165 teeth, closed loop
ATTI • Code 062324 • CF HTD04950309
HTD timing belt 495-3M-09, pitch 3M, width 9 mm, length 495 mm, 165 teeth, closed loop
List price 12,38 € /pc.
Online 6,81 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 495-3M-12, pitch 3M, width 12 mm, length 495 mm, 165 teeth, closed loop
ATTI • Code 062325 • CF HTD04950312
HTD toothed belt 495-3M-12, pitch 3M, width 12 mm, length 495 mm, 165 teeth, closed loop
List price 16,50 € /pc.
Online 9,08 € /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 €