STD Standard Pilot Bore Timing Pulleys
STD standard timing pulleys are the basic type of pulleys for belts in the STD profile. They are made of steel or gray cast iron as unbored or with a pilot bore. Their design is based on the ISO 5294 (DIN 7721) standard.
The pulleys are supplied as a semi-finished product and the inner hole needs to be adjusted to fix them on the shafts.
Typical Applications
The STD standard timing pulleys are designed for all types of STD belts.
They are typically used in high-speed machine tools, compressors, packaging, printing and textile machines and in many other machines.
They are also typically used in machines from Asia, especially Japan.
Materials
Steel or grey cast iron.
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.
Matching Belts
- S3M pulley for STD S3M belts with pitch of 3.00 mm – on request
- S5M pulley for STD S5M belts with pitch of 5.00 mm – on request
- S8M pulley for STD S8M belts with pitch of 8.00 mm
- S14M pulley for STD S14M belts with pitch of 14.00 mm
Pulley Code Description
Example:
30-S8M-20 (Type 6F, Steel)
| Code Part | Description |
|---|---|
| 30 |
Number of pulley teeth |
| S8M |
Teeth pitch in mm and profile of pulleys for belts STD |
| 20 |
Width of belt in mm |
| 6F |
Type of construction |
| Steel |
Pulley material |
Documents for Download
Dimensions and Parameters of STD Standard Pilot Bore Timing Pulleys
TYMA CZ Data Sheets
Czech and English (PDF 1.19 MB)
Related Products
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Pulley Manufacturer Profile
SIT S.p.A. is a company focused on mechanical power transmission (SIT stands for Società Italiana Trasmissioni, meaning Italian Power Transmission Company). Under the SIT brand, it develops, engineers, manufactures, and distributes high-quality solutions and components for industrial applications across a wide range of sectors – from automotive and precision engineering to the food and textile industries, as well as chemical plants and logistics centers.
Together with Elatech S.r.l. and other companies, SIT S.p.A. is part of the Scaglia Group. The Group operates in Europe, North America, and Asia, and comprises 7 manufacturing facilities and 6 subsidiaries with more than 1,000 employees. As part of the Group, the individual companies benefit from shared technologies and innovations, providing financial stability and sustainable growth.
We are an authorized distributor of shaft couplings, bushes, sprockets, and pulleys from SIT S.p.A., as well as polyurethane timing belts and conveyor belts from Elatech S.r.l.