Timing pulleys
and Gears
Pulleys for Timing Belts
When creating a transport system using timing belts, it is necessary to create the corresponding pulleys with a high level of precision which in many cases cannot be guaranteed using standard off-the-shelf pulleys.
In order to achieve a high standard of quality and ensure that the machining is aligned with the teeth, our production process involves the initial phases being carried out using CNC machining centres and lathes, before then performing the toothing as the last operation, taking advantage of the existing machining for placement.
Cast Pulleys
When the number of pulleys is fairly large, we can create a mould to make aluminium castings in order to ensure excellent technical results combined with the best price-quality ratio.
As we already have various rough castings available in diameters up to 800 mm, we recommend sending us drawings of the pulley to be created so that we can check if we already have a suitable rough casting geometry in stock.
timing belts for belts are made with certified generators both with normal and zero backlash, and are available in the following pitches: AT – T – XL – L – H -XH – HTD – RPP – ATP.
Flanged Pulleys
The most common system to hold the timing belt on the pulley is to use flanges which are pressed on, or alternatively threaded holes can be created on the pulley before screwing on the flanges.
The first solution is the cheapest but offers less of a guarantee of long-term holding, while the second solution is the most reliable, and also allows thicker flanges to be used.
Self-Guiding Pulleys
When using flanges, residue of the transported product can be deposited in the area between the belt and the flange; the most cost-effective solution to solve this problem is to use a belt with a trapezoidal profile, which when combined with the use of pulleys with a central throat, allows the system to be self-guided.
If the pitch diameters are small, the pulley can be made in two parts, placing a spoked disc in the middle which can keep the belt guided with a central channel.
Toothed Sectors and Plates
Usually off-the-shelf plates are used to lock the ends of the open timing belt, but when the design requires a non-standard geometry we can create toothed plates to drawing specifications in any material and format.
When the application requires only a part to be toothed, it is possible to supply sectors made to drawing specifications in any material, which are subsequently toothed for belt or gear.
Gears
As well as timing belts for belts, we are also able to supply gears, as we have generators for metric module toothing (from 0.5 to 6 mm) we can create gear wheels, whole or in sectors, with straight or inclined teeth.
We can create toothed components in most commercially available materials, whether plastics such as POM, PA6, PEEK, TEFLON and NYLON, or metals such as C45 steel, 39NiCrMo4, BRASS, BRONZE, ALUMINIUM, STEEL, STAINLESS STEEL etc.; we use only certified materials in order to guarantee the origin of the parts made to drawing specifications which we supply.
As well as being able to count on many types of different metals, we can also combine specific treatments such as:
ANODISATION, BLUING, GALVANISATION, NICKEL PLATING, HARD ANODIC OXIDISATION, GOLD HARD ANODISATION (GHA) etc.
1 – Pulleys with fastening holes allow thicker than standard flanges to be used
2 – Aluminium components milled from a single billet and with AT10 toothing, used in the pharmaceutical sector
3 – ATK10 pitch self-guiding pulley with conical bushing and C45 steel shaft
4 – AT10 pitch cast aluminium pulley with hard anodic oxidisation coating
5 – Generators are available for all timing belt pitches: T, AT, ATP, XL, L, H, XH, HTD, RPP
6 – The maximum diameter of toothed pulley we can manufacture is around 800 mm
7 – We hold various raw casting sizes in our warehouse for use in new projects
8 – Various types of machining can be performed to lighten the mass of timing belts
9 – Screwed on flanges provide excellent holding against the lateral thrust of the belts
10 – Aluminium pulley with central machining for self-guided ATK belt
11 – Aluminium toothed bar for T10 belt pitch; can be customised with machining to drawing specifications
12 – By using belts with false teeth, it is possible to create channels on the pulleys to allow use of longer screws
13 – All pulleys are toothed as the last machining stage, using only certified generators
14 – Silver-ion GHA treatment on aluminium pulleys for the food sector
15 – Toothed plates for belts can be manufactured to customer requirements
16 – On the basis of design requirements, we can also produce toothed circumference sectors
17 – The straight and inclined teeth steel gears can be manufactured to 0.5 – 6 mm module
18 – Surface treatments such as galvanisation, bluing, nickel-plating etc. can be applied to toothed components.
19 – We can produce timing belts and gears in plastics such as POM, PA6, PEEK, TEFLON, NYLON
20 – Gear wheels can be supplied in any material with relative certificate of origin