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.
Pulleys Fields of Use
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.
Steel or grey cast iron.
Other materials to order.
|Surface roughness||ISO 254|
|Balance quality grade||VDI 2060, ISO 1940|
Cast iron pulleys at v < 30 m/s must be balanced.
Pulleys Code Description
30-S8M-20 (Type 6F, Steel)
Number of pulley teeth
Teeth pitch in mm and profile of pulleys for belts STD
Width of belt in mm
Type of construction
Documents for Download
TYMA CZ Data Sheets
Czech and English (PDF 1.19 MB)
TYMA CZ Catalogue
Czech and English (PDF 3.64 MB)
The group SIT S.p.A develops, engineers, manufactures and distributes high quality solutions and components for power transmission for industrial applications of excellence worldwide, with the aim of increasing the productivity of its customers’ machines and systems. With operations on 3 continents, SIT manufactures pulleys, rubber and polyurethane belts, drive couplings, locking assemblies and a wide range of accessories.
SIT belongs to a large industrial group that dates as far back as 1838. Today, thanks to over 50 years of specific experience in power transmission and a close-knit team of highly qualified professionals, the Group engages in constant technological innovation in order to offer the best application solutions in mechanical power drives.