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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 860-5M-09, pitch 5M, width 9 mm, length 860 mm, 172 teeth, endless loop
ATTI • Code 039158 • CF HTD08600509
HTD timing belt 860-5M-09, pitch 5M, width 9 mm, length 860 mm, 172 teeth, endless loop
List price 18,57 € /pc.
Online 10,21 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 950-5M-09, pitch 5M, width 9 mm, length 950 mm, 190 teeth, closed loop
ATTI • Code 039160 • CF HTD09500509
HTD toothed belt 950-5M-09, pitch 5M, width 9 mm, length 950 mm, 190 teeth, closed loop
List price 20,09 € /pc.
Online 11,05 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 980-5M-09, pitch 5M, width 9 mm, length 980 mm, 196 teeth, endless loop
ATTI • Code 039161 • CF HTD09800509
HTD timing belt 980-5M-09, pitch 5M, width 9 mm, length 980 mm, 196 teeth, endless loop
List price 20,73 € /pc.
Online 11,40 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 1035-5M-09, pitch 5M, width 9 mm, development 1035 mm, 207 teeth, closed loop
ATTI • Code 039162 • CF HTD10350509
HTD toothed belt 1035-5M-09, pitch 5M, width 9 mm, development 1035 mm, 207 teeth, closed loop
List price 21,83 € /pc.
Online 12,01 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 1050-5M-09, pitch 5M, width 9 mm, length 1050 mm, 210 teeth, closed loop
ATTI • Code 039163 • CF HTD10500509
HTD timing belt 1050-5M-09, pitch 5M, width 9 mm, length 1050 mm, 210 teeth, closed loop
List price 22,13 € /pc.
Online 12,17 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 1350-5M-09, pitch 5M, width 9 mm, length 1350 mm, 270 teeth, closed loop
ATTI • Code 039166 • CF HTD13500509
HTD toothed belt 1350-5M-09, pitch 5M, width 9 mm, length 1350 mm, 270 teeth, closed loop
List price 28,48 € /pc.
Online 15,66 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 255-5M-15, pitch 5M, width 15 mm, length 255 mm, 51 teeth, closed loop
ATTI • Code 039168 • CF HTD02550515
HTD timing belt 255-5M-15, pitch 5M, width 15 mm, length 255 mm, 51 teeth, closed loop
List price 9,77 € /pc.
Online 5,37 € /pc.
On Order
(Ship. 6-7 days)
HTD 280-5M-15 toothed belt, pitch 5M, width 15 mm, length 280 mm, 56 teeth, closed loop
ATTI • Code 039169 • CF HTD02800515
HTD 280-5M-15 toothed belt, pitch 5M, width 15 mm, length 280 mm, 56 teeth, closed loop
List price 10,69 € /pc.
Online 5,88 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 325-5M-15, pitch 5M, width 15 mm, length 325 mm, 65 teeth, closed loop
ATTI • Code 039170 • CF HTD03250515
HTD toothed belt 325-5M-15, pitch 5M, width 15 mm, length 325 mm, 65 teeth, closed loop
List price 12,41 € /pc.
Online 6,83 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 300-5M-15, pitch 5M, width 15 mm, length 300 mm, 60 teeth, closed-loop
ATTI • Code 039171 • CF HTD03000515
HTD timing belt 300-5M-15, pitch 5M, width 15 mm, length 300 mm, 60 teeth, closed-loop
List price 11,50 € /pc.
Online 6,33 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 305-5M-15, pitch 5M, width 15 mm, length 305 mm, 61 teeth, closed loop
ATTI • Code 039172 • CF HTD03050515
HTD timing belt 305-5M-15, pitch 5M, width 15 mm, length 305 mm, 61 teeth, closed loop
List price 11,60 € /pc.
Online 6,38 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 340-5M-15, pitch 5M, width 15 mm, length 340 mm, 68 teeth, closed loop
ATTI • Code 039173 • CF HTD03400515
HTD timing belt 340-5M-15, pitch 5M, width 15 mm, length 340 mm, 68 teeth, closed loop
List price 12,99 € /pc.
Online 7,14 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 350-5M-15, pitch 5M, width 15 mm, length 350 mm, 70 teeth, closed loop
ATTI • Code 039174 • CF HTD03500515
HTD timing belt 350-5M-15, pitch 5M, width 15 mm, length 350 mm, 70 teeth, closed loop
List price 13,34 € /pc.
Online 7,33 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 375-5M-15, pitch 5M, width 15 mm, length 375 mm, 75 teeth, closed loop
ATTI • Code 039175 • CF HTD03750515
HTD toothed belt 375-5M-15, pitch 5M, width 15 mm, length 375 mm, 75 teeth, closed loop
List price 14,26 € /pc.
Online 7,84 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 400-5M-15, pitch 5M, width 15 mm, length 400 mm, 80 teeth, closed loop
ATTI • Code 039176 • CF HTD04000515
HTD belt 400-5M-15, pitch 5M, width 15 mm, length 400 mm, 80 teeth, closed loop
List price 15,58 € /pc.
Online 8,57 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 425-5M-15, pitch 5M, width 15 mm, length 425 mm, 85 teeth, endless loop
ATTI • Code 039177 • CF HTD04250515
HTD timing belt 425-5M-15, pitch 5M, width 15 mm, length 425 mm, 85 teeth, endless loop
List price 16,52 € /pc.
Online 9,08 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 450-5M-15, pitch 5M, width 15 mm, length 450 mm, 90 teeth, closed loop
ATTI • Code 039178 • CF HTD04500515
HTD timing belt 450-5M-15, pitch 5M, width 15 mm, length 450 mm, 90 teeth, closed loop
List price 16,94 € /pc.
Online 9,32 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 475-5M-15, pitch 5M, width 15 mm, length 475 mm, 95 teeth, closed loop
ATTI • Code 039179 • CF HTD04750515
HTD timing belt 475-5M-15, pitch 5M, width 15 mm, length 475 mm, 95 teeth, closed loop
List price 17,67 € /pc.
Online 9,72 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 500-5M-15, pitch 5M, width 15 mm, length 500 mm, 100 teeth, closed loop
ATTI • Code 039180 • CF HTD05000515
HTD timing belt 500-5M-15, pitch 5M, width 15 mm, length 500 mm, 100 teeth, closed loop
List price 18,50 € /pc.
Online 10,18 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 525-5M-15, pitch 5M, width 15 mm, length 525 mm, 105 teeth, closed loop
ATTI • Code 039181 • CF HTD05250515
HTD belt 525-5M-15, pitch 5M, width 15 mm, length 525 mm, 105 teeth, closed loop
List price 19,44 € /pc.
Online 10,69 € /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 €