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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 1350-5M-25, pitch 5M, width 25 mm, length 1350 mm, 270 teeth, closed loop
ATTI • Code 039232 • CF HTD13500525
HTD timing belt 1350-5M-25, pitch 5M, width 25 mm, length 1350 mm, 270 teeth, closed loop
List price 79,10 € /pc.
Online 43,51 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 480-8M-20, pitch 8M, width 20 mm, length 480 mm, 60 teeth, closed loop
ATTI • Code 039233 • CF HTD04800820
HTD toothed belt 480-8M-20, pitch 8M, width 20 mm, length 480 mm, 60 teeth, closed loop
List price 19,12 € /pc.
Online 10,52 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 480-8M-30, pitch 8M, width 30 mm, length 480 mm, 60 teeth, closed loop
ATTI • Code 039234 • CF HTD04800830
HTD toothed belt 480-8M-30, pitch 8M, width 30 mm, length 480 mm, 60 teeth, closed loop
List price 28,69 € /pc.
Online 15,78 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 480-8M-50, pitch 8M, width 50 mm, length 480 mm, 60 teeth, closed loop
ATTI • Code 039235 • CF HTD04800850
HTD toothed belt 480-8M-50, pitch 8M, width 50 mm, length 480 mm, 60 teeth, closed loop
List price 47,81 € /pc.
Online 26,30 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 480-8M-85, pitch 8M, width 85 mm, length 480 mm, 60 teeth, closed loop
ATTI • Code 039236 • CF HTD04800885
HTD belt 480-8M-85, pitch 8M, width 85 mm, length 480 mm, 60 teeth, closed loop
List price 81,29 € /pc.
Online 44,71 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 560-8M-20, pitch 8M, width 20 mm, length 560 mm, 70 teeth, endless loop
ATTI • Code 039237 • CF HTD05600820
HTD toothed belt 560-8M-20, pitch 8M, width 20 mm, length 560 mm, 70 teeth, endless loop
List price 22,39 € /pc.
Online 12,32 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 560-8M-30, pitch 8M, width 30 mm, length 560 mm, 70 teeth, closed loop
ATTI • Code 039238 • CF HTD05600830
HTD timing belt 560-8M-30, pitch 8M, width 30 mm, length 560 mm, 70 teeth, closed loop
List price 33,60 € /pc.
Online 18,48 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 560-8M-50, pitch 8M, width 50 mm, length 560 mm, 70 teeth, closed loop
ATTI • Code 039239 • CF HTD05600850
HTD toothed belt 560-8M-50, pitch 8M, width 50 mm, length 560 mm, 70 teeth, closed loop
List price 55,99 € /pc.
Online 30,79 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 560-8M-85, pitch 8M, width 85 mm, length 560 mm, 70 teeth, closed loop
ATTI • Code 039240 • CF HTD05600885
HTD toothed belt 560-8M-85, pitch 8M, width 85 mm, length 560 mm, 70 teeth, closed loop
List price 95,17 € /pc.
Online 52,34 € /pc.
On Order
(Ship. 6-7 days)
HTD tooth belt 600-8M-20, pitch 8M, width 20 mm, development 600 mm, 75 teeth, closed loop
ATTI • Code 039241 • CF HTD06000820
HTD tooth belt 600-8M-20, pitch 8M, width 20 mm, development 600 mm, 75 teeth, closed loop
List price 23,86 € /pc.
Online 13,13 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 600-8M-30, pitch 8M, width 30 mm, length 600 mm, 75 teeth, closed loop
ATTI • Code 039242 • CF HTD06000830
HTD timing belt 600-8M-30, pitch 8M, width 30 mm, length 600 mm, 75 teeth, closed loop
List price 35,80 € /pc.
Online 19,69 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 600-8M-85, pitch 8M, width 85 mm, length 600 mm, 75 teeth, closed loop
ATTI • Code 039244 • CF HTD06000885
HTD toothed belt 600-8M-85, pitch 8M, width 85 mm, length 600 mm, 75 teeth, closed loop
List price 101,44 € /pc.
Online 55,79 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 640-8M-20, pitch 8M, width 20 mm, length 640 mm, 80 teeth, endless loop
ATTI • Code 039245 • CF HTD06400820
HTD timing belt 640-8M-20, pitch 8M, width 20 mm, length 640 mm, 80 teeth, endless loop
List price 25,50 € /pc.
Online 14,02 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 640-8M-30, pitch 8M, width 30 mm, length 640 mm, 80 teeth, closed loop
ATTI • Code 039246 • CF HTD06400830
HTD belt 640-8M-30, pitch 8M, width 30 mm, length 640 mm, 80 teeth, closed loop
List price 38,26 € /pc.
Online 21,04 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 640-8M-50, pitch 8M, width 50 mm, length 640 mm, 80 teeth, closed loop
ATTI • Code 039247 • CF HTD06400850
HTD timing belt 640-8M-50, pitch 8M, width 50 mm, length 640 mm, 80 teeth, closed loop
List price 63,75 € /pc.
Online 35,06 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 640-8M-85, pitch 8M, width 85 mm, length 640 mm, 80 teeth, closed loop
ATTI • Code 039248 • CF HTD06400885
HTD belt 640-8M-85, pitch 8M, width 85 mm, length 640 mm, 80 teeth, closed loop
List price 108,37 € /pc.
Online 59,60 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 720-8M-20, pitch 8M, width 20 mm, length 720 mm, 90 teeth, closed loop
ATTI • Code 039249 • CF HTD07200820
HTD timing belt 720-8M-20, pitch 8M, width 20 mm, length 720 mm, 90 teeth, closed loop
List price 28,77 € /pc.
Online 15,82 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 720-8M-50, pitch 8M, width 50 mm, length 720 mm, 90 teeth, closed loop
ATTI • Code 039251 • CF HTD07200850
HTD timing belt 720-8M-50, pitch 8M, width 50 mm, length 720 mm, 90 teeth, closed loop
List price 71,93 € /pc.
Online 39,56 € /pc.
On Order
(Ship. 6-7 days)
HTD Timing Belt 720-8M-85, pitch 8M, width 85 mm, length 720 mm, 90 teeth, closed loop
ATTI • Code 039252 • CF HTD07200885
HTD Timing Belt 720-8M-85, pitch 8M, width 85 mm, length 720 mm, 90 teeth, closed loop
List price 122,28 € /pc.
Online 67,25 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 760-8M-20, pitch 8M, width 20 mm, length 760 mm, 95 teeth, closed loop
ATTI • Code 039253 • CF HTD07600820
HTD toothed belt 760-8M-20, pitch 8M, width 20 mm, length 760 mm, 95 teeth, closed loop
List price 30,26 € /pc.
Online 16,65 € /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 €