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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.

STD S8M Standard Pilot Bore Timing Pulleys - Preview

STD S8M

Tooth pitch: 8.0 mm
Teeth z = 22 - 192
Diameters Dp (mm): 45.84 - 488.92
STD S14M Standard Pilot Bore Timing Pulleys - Preview

STD S14M

Tooth pich: 14.0 mm
Teeth z = 28 - 144
Stand. diameters Dp (mm): 124.78 - 641.71

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.

Pulleys Material

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.

Pulleys 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 - Preview

Dimensions and Parameters of STD Standard Pilot Bore Timing Pulleys

TYMA CZ Data Sheets

Czech and English (PDF 1.19 MB)

Pulleys and Clamping Bushes - Preview

Pulleys and Clamping Bushes

TYMA CZ Catalogue

Czech and English (PDF 3.64 MB)


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Manufacturer Profile

logo SIT

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.

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