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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 800-8M-30, pitch 8M, width 30 mm, length 800 mm, 100 teeth, closed loop
ATTI • Code 038237 • CF HTD08000830
HTD timing belt 800-8M-30, pitch 8M, width 30 mm, length 800 mm, 100 teeth, closed loop
List price 47,81 € /pc.
Online 26,30 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 720-8M-30, pitch 8M, width 30 mm, length 720 mm, 90 teeth, closed loop
ATTI • Code 038238 • CF HTD07200830
HTD toothed belt 720-8M-30, pitch 8M, width 30 mm, length 720 mm, 90 teeth, closed loop
List price 43,16 € /pc.
Online 23,74 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 1040-8M-30, pitch 8M, width 30 mm, length 1040 mm, 130 teeth, closed ring
ATTI • Code 038239 • CF HTD10400830
HTD toothed belt 1040-8M-30, pitch 8M, width 30 mm, length 1040 mm, 130 teeth, closed ring
List price 62,28 € /pc.
Online 34,26 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 150-3M-09, pitch 3M, width 9 mm, circumference 150 mm, 50 teeth, closed loop
ATTI • Code 039090 • CF HTD01500309
HTD timing belt 150-3M-09, pitch 3M, width 9 mm, circumference 150 mm, 50 teeth, closed loop
List price 3,74 € /pc.
Online 2,06 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 165-3M-09, pitch 3M, width 9 mm, length 165 mm, 55 teeth, closed loop
ATTI • Code 039091 • CF HTD01650309
HTD toothed belt 165-3M-09, pitch 3M, width 9 mm, length 165 mm, 55 teeth, closed loop
List price 4,08 € /pc.
Online 2,24 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 180-3M-09, pitch 3M, width 9 mm, length 180 mm, 60 teeth, closed loop
ATTI • Code 039092 • CF HTD01800309
HTD timing belt 180-3M-09, pitch 3M, width 9 mm, length 180 mm, 60 teeth, closed loop
List price 4,47 € /pc.
Online 2,46 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 195-3M-09, pitch 3M, width 9 mm, length 195 mm, 65 teeth, closed loop
ATTI • Code 039093 • CF HTD01950309
HTD timing belt 195-3M-09, pitch 3M, width 9 mm, length 195 mm, 65 teeth, closed loop
List price 4,87 € /pc.
Online 2,68 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 210-3M-09, pitch 3M, width 9 mm, development 210 mm, 70 teeth, closed loop
ATTI • Code 039094 • CF HTD02100309
HTD belt 210-3M-09, pitch 3M, width 9 mm, development 210 mm, 70 teeth, closed loop
List price 5,19 € /pc.
Online 2,85 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 225-3M-09, pitch 3M, width 9 mm, length 225 mm, 75 teeth, closed loop
ATTI • Code 039095 • CF HTD02250309
HTD timing belt 225-3M-09, pitch 3M, width 9 mm, length 225 mm, 75 teeth, closed loop
List price 5,58 € /pc.
Online 3,07 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 252-3M-09, pitch 3M, width 9 mm, length 252 mm, 84 teeth, closed loop
ATTI • Code 039096 • CF HTD02520309
HTD timing belt 252-3M-09, pitch 3M, width 9 mm, length 252 mm, 84 teeth, closed loop
List price 6,24 € /pc.
Online 3,43 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 255-3M-09, pitch 3M, width 9 mm, length 255 mm, 85 teeth, closed loop
ATTI • Code 039097 • CF HTD02550309
HTD timing belt 255-3M-09, pitch 3M, width 9 mm, length 255 mm, 85 teeth, closed loop
List price 6,30 € /pc.
Online 3,47 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 285-3M-09, pitch 3M, width 9 mm, length 285 mm, 95 teeth, closed loop
ATTI • Code 039098 • CF HTD02850309
HTD toothed belt 285-3M-09, pitch 3M, width 9 mm, length 285 mm, 95 teeth, closed loop
List price 7,10 € /pc.
Online 3,91 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 300-3M-09, pitch 3M, width 9 mm, length 300 mm, 100 teeth, closed loop
ATTI • Code 039099 • CF HTD03000309
HTD toothed belt 300-3M-09, pitch 3M, width 9 mm, length 300 mm, 100 teeth, closed loop
List price 7,42 € /pc.
Online 4,08 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 330-3M-09, pitch 3M, width 9 mm, circumference 330 mm, 110 teeth, closed loop
ATTI • Code 039100 • CF HTD03300309
HTD timing belt 330-3M-09, pitch 3M, width 9 mm, circumference 330 mm, 110 teeth, closed loop
List price 8,21 € /pc.
Online 4,52 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 357-3M-09, pitch 3M, width 9 mm, length 357 mm, 119 teeth, endless loop
ATTI • Code 039101 • CF HTD03570309
HTD toothed belt 357-3M-09, pitch 3M, width 9 mm, length 357 mm, 119 teeth, endless loop
List price 8,87 € /pc.
Online 4,88 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 384-3M-09, pitch 3M, width 9 mm, length 384 mm, 128 teeth, closed loop
ATTI • Code 039102 • CF HTD03840309
HTD timing belt 384-3M-09, pitch 3M, width 9 mm, length 384 mm, 128 teeth, closed loop
List price 9,53 € /pc.
Online 5,24 € /pc.
On Order
(Ship. 6-7 days)
HTD 420-3M-09 timing belt, pitch 3M, width 9 mm, length 420 mm, 140 teeth, closed loop
ATTI • Code 039103 • CF HTD04200309
HTD 420-3M-09 timing belt, pitch 3M, width 9 mm, length 420 mm, 140 teeth, closed loop
List price 10,44 € /pc.
Online 5,74 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 447-3M-09, pitch 3M, width 9 mm, length 447 mm, 149 teeth, closed loop
ATTI • Code 039104 • CF HTD04470309
HTD timing belt 447-3M-09, pitch 3M, width 9 mm, length 447 mm, 149 teeth, closed loop
List price 11,10 € /pc.
Online 6,10 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 474-3M-09, pitch 3M, width 9 mm, length 474 mm, 158 teeth, closed loop
ATTI • Code 039105 • CF HTD04740309
HTD timing belt 474-3M-09, pitch 3M, width 9 mm, length 474 mm, 158 teeth, closed loop
List price 11,76 € /pc.
Online 6,47 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 513-3M-09, pitch 3M, width 9 mm, length 513 mm, 171 teeth, closed loop
ATTI • Code 039106 • CF HTD05130309
HTD timing belt 513-3M-09, pitch 3M, width 9 mm, length 513 mm, 171 teeth, closed loop
List price 12,76 € /pc.
Online 7,02 € /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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