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Inch Sizes Taper Lock Timing Pulleys

Inch Sizes Standard timing pulleys in L, H and XH profile are the basic type of pulleys for inch belts with trapezoidal profile. They are made of gray cast iron. Designed according to ISO 5294.

The pulleys are mounted on shafts using the Taper Lock bushes, thanks to which there is not only a fixing on the shaft with a keyway, but also an axial locking against displacement.

L Inch Sizes Taper Lock Timing Pulleys - Preview

L Inch Sizes

Tooth pitch: 9.525 mm
Teeth z = 18 - 120
Stand. diameters Dp (mm): 54.57 - 363.83
H Inch Sizes Taper Lock Timing Pulleys - Preview

H Inch Sizes

Tooth pitch: 12.700 mm
Teeth z = 16 - 120
Stand. diameters Dp (mm): 64.68 - 485.10
XH Inch Sizes Taper Lock Timing Pulleys - Preview

XH Inch Sizes

Tooth pitch: 22.250 mm
Teeth z = 18 - 84
Stand. diameters Dp (mm): 124,55 - 591,46

Pulleys Fields of Use

The L, H, XH Taper timing pulleys are designed for all types of 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 HTD, STD or CTD profiles.

Pulleys Material

Steel or grey cast iron. 

Other materials to order.

Parameter Standard
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 H 150 (Type 5F) TB 1610 (Steel)

Code Part Description

Number of pulley teeth




Width of the belt in inches × 1/100 (1,50" = 38.10 mm)

Type 5F

Type of construction


Taper Bush


Type of  Taper Bush 


Pulley material

Documents for Download

Dimensions and Parameters of Inch Sizes Taper Lock Timing Pulleys - Preview

Dimensions and Parameters of Inch Sizes Taper Lock Timing Pulleys

TYMA CZ Data Sheets

Czech and English (PDF 1.13 MB)

Pulleys and Clamping Bushes - Preview

Pulleys and Clamping Bushes

TYMA CZ Catalogue

Czech and English (PDF 3.64 MB)

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