Inch Sizes Standard Pilot Bore Timing Pulleys
Inch Sizes standard timing pulleys in XL, L, H and XH profile are the basic type of pulleys for inch belts with trapezoidal profile. They are made of steel, cast iron or aluminium alloy as unbored or with a pilot bore. Designed according to ISO 5294.
The pulleys are supplied as a semi-finished product and the internal hole must be modified before mounting the pulleys on the shafts.
Pulleys Fields of Use
The XL, L, H, XH standard timing pulleys are designed for all types of XL, L, H, XH belts.
They are typically used in older machines with lower and medium performance, for example in packaging machines, in the ceramic, textile, food and tobacco industry and in many other machines.
In new applications, they are often replaced by HTDHigh Torque Drive
Because of its tooth height and semi-circular tooth geometry, the HTD profile is especially good at avoiding jump-over of the teeth in operation. The HTD profile is extremely suitable for transmitting high torques., STDSuper Torque Drive
The involute shape of the STD profile allows optimal tooth engagement with the pulley. As a result, it provides precise and quiet operation even at high belt speeds. or CTDConti Torque Drive
The CTD profile is a symbiosis of the HTD and STD profiles, combining the benefits of both tooth geometries. The tooth height and width correspond to that of the HTD profile for transmitting extremely high torques and preventing jump-over at the same time, while the involute-shaped flank ensures very smooth running. profiles.
Pulleys Material
Steel, grey cast iron or aluminum alloy.
Other materials to order.
| Parameter | Standard |
|---|---|
| Surface roughness | ISO 254 |
| Balance quality grade | VDI 2060, ISO 1940 |
Caution
Cast iron pulleys at v < 30 m/s must be balanced.
Pulleys Code Description
Example:
30 XL 037 (Type 6F, Al Alloy)
| Code Part | Description |
|---|---|
| 30 |
Number of pulley teeth |
| XL |
Teeth pitch in mm and type of pulleys for belts STDSuper Torque Drive |
| 037 |
Width of the belt in inches × 1/100 (0,37" = 9,398 mm) |
| 6F |
Type of construction |
| Al Alloy |
Pulley material |
Documents for Download
Dimensions and Parameters of Inch Sizes Standard Pilot Bore Timing Pulleys
TYMA CZ Data Sheets
Czech and English (PDF 1.90 MB)
Related Products
Inch Sizes Timing Belts
Rubber timing belts in trapezoidal inch profiles according to ISO 5296
Measuring Instruments
Our professional-quality special tools and measuring instruments will assist you in maintaining and fitting drive components.