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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 toothed belt 550-5M-15, pitch 5M, width 15 mm, length 550 mm, 110 teeth, closed loop
ATTI • Code 039182 • CF HTD05500515
HTD toothed belt 550-5M-15, pitch 5M, width 15 mm, length 550 mm, 110 teeth, closed loop
List price 20,38 € /pc.
Online 11,21 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 560-5M-15, pitch 5M, width 15 mm, length 560 mm, 112 teeth, closed loop
ATTI • Code 039183 • CF HTD05600515
HTD toothed belt 560-5M-15, pitch 5M, width 15 mm, length 560 mm, 112 teeth, closed loop
List price 20,78 € /pc.
Online 11,43 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 600-5M-15, pitch 5M, width 15 mm, length 600 mm, 120 teeth, closed loop
ATTI • Code 039185 • CF HTD06000515
HTD timing belt 600-5M-15, pitch 5M, width 15 mm, length 600 mm, 120 teeth, closed loop
List price 22,46 € /pc.
Online 12,36 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 635-5M-15, pitch 5M, width 15 mm, length 635 mm, 127 teeth, closed loop
ATTI • Code 039186 • CF HTD06350515
HTD toothed belt 635-5M-15, pitch 5M, width 15 mm, length 635 mm, 127 teeth, closed loop
List price 23,76 € /pc.
Online 13,07 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 670-5M-15, pitch 5M, width 15 mm, length 670 mm, 134 teeth, closed loop
ATTI • Code 039187 • CF HTD06700515
HTD timing belt 670-5M-15, pitch 5M, width 15 mm, length 670 mm, 134 teeth, closed loop
List price 25,06 € /pc.
Online 13,78 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 700-5M-15, pitch 5M, width 15 mm, length 700 mm, 140 teeth, closed loop
ATTI • Code 039188 • CF HTD07000515
HTD timing belt 700-5M-15, pitch 5M, width 15 mm, length 700 mm, 140 teeth, closed loop
List price 26,25 € /pc.
Online 14,44 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 750-5M-15, pitch 5M, width 15 mm, length 750 mm, 150 teeth, closed loop
ATTI • Code 039189 • CF HTD07500515
HTD timing belt 750-5M-15, pitch 5M, width 15 mm, length 750 mm, 150 teeth, closed loop
List price 28,14 € /pc.
Online 15,47 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 800-5M-15, pitch 5M, width 15 mm, length 800 mm, 160 teeth, closed loop
ATTI • Code 039190 • CF HTD08000515
HTD belt 800-5M-15, pitch 5M, width 15 mm, length 800 mm, 160 teeth, closed loop
List price 30,03 € /pc.
Online 16,52 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 860-5M-15, pitch 5M, width 15 mm, length 860 mm, 172 teeth, endless loop
ATTI • Code 039191 • CF HTD08600515
HTD timing belt 860-5M-15, pitch 5M, width 15 mm, length 860 mm, 172 teeth, endless loop
List price 30,94 € /pc.
Online 17,02 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 900-5M-15, pitch 5M, width 15 mm, length 900 mm, 180 teeth, closed loop
ATTI • Code 039192 • CF HTD09000515
HTD timing belt 900-5M-15, pitch 5M, width 15 mm, length 900 mm, 180 teeth, closed loop
List price 32,05 € /pc.
Online 17,63 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 950-5M-15, pitch 5M, width 15 mm, length 950 mm, 190 teeth, closed loop
ATTI • Code 039193 • CF HTD09500515
HTD toothed belt 950-5M-15, pitch 5M, width 15 mm, length 950 mm, 190 teeth, closed loop
List price 33,48 € /pc.
Online 18,42 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 980-5M-15, pitch 5M, width 15 mm, length 980 mm, 196 teeth, closed loop
ATTI • Code 039194 • CF HTD09800515
HTD timing belt 980-5M-15, pitch 5M, width 15 mm, length 980 mm, 196 teeth, closed loop
List price 34,56 € /pc.
Online 19,01 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 1050-5M-15, pitch 5M, width 15 mm, length 1050 mm, 210 teeth, closed loop
ATTI • Code 039195 • CF HTD10500515
HTD timing belt 1050-5M-15, pitch 5M, width 15 mm, length 1050 mm, 210 teeth, closed loop
List price 36,89 € /pc.
Online 20,29 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 1350-5M-15, pitch 5M, width 15 mm, length 1350 mm, 270 teeth, closed loop
ATTI • Code 039198 • CF HTD13500515
HTD toothed belt 1350-5M-15, pitch 5M, width 15 mm, length 1350 mm, 270 teeth, closed loop
List price 47,46 € /pc.
Online 26,10 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 225-5M-25, pitch 5M, width 25 mm, length 225 mm, 45 teeth, closed loop
ATTI • Code 039200 • CF HTD02250525
HTD timing belt 225-5M-25, pitch 5M, width 25 mm, length 225 mm, 45 teeth, closed loop
List price 14,38 € /pc.
Online 7,91 € /pc.
On Order
(Ship. 6-7 days)
HTD toothed belt 255-5M-25, pitch 5M, width 25 mm, length 255 mm, 51 teeth, closed loop
ATTI • Code 039201 • CF HTD02550525
HTD toothed belt 255-5M-25, pitch 5M, width 25 mm, length 255 mm, 51 teeth, closed loop
List price 16,28 € /pc.
Online 8,95 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 280-5M-25, pitch 5M, width 25 mm, length 280 mm, 56 teeth, closed loop
ATTI • Code 039202 • CF HTD02800525
HTD timing belt 280-5M-25, pitch 5M, width 25 mm, length 280 mm, 56 teeth, closed loop
List price 17,82 € /pc.
Online 9,80 € /pc.
On Order
(Ship. 6-7 days)
HTD timing belt 305-5M-25, pitch 5M, width 25 mm, length 305 mm, 61 teeth, closed loop
ATTI • Code 039204 • CF HTD03050525
HTD timing belt 305-5M-25, pitch 5M, width 25 mm, length 305 mm, 61 teeth, closed loop
List price 19,35 € /pc.
Online 10,64 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 325-5M-25, pitch 5M, width 25 mm, length 325 mm, 65 teeth, closed loop
ATTI • Code 039205 • CF HTD03250525
HTD belt 325-5M-25, pitch 5M, width 25 mm, length 325 mm, 65 teeth, closed loop
List price 20,69 € /pc.
Online 11,38 € /pc.
On Order
(Ship. 6-7 days)
HTD belt 340-5M-25, pitch 5M, width 25 mm, length 340 mm, 68 teeth, closed loop
ATTI • Code 039206 • CF HTD03400525
HTD belt 340-5M-25, pitch 5M, width 25 mm, length 340 mm, 68 teeth, closed loop
List price 21,66 € /pc.
Online 11,91 € /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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