Overview

This document details technical specifications for HTD® timing belt pulleys designed for taper bushes, covering multiple series and configurations. It provides comprehensive data on dimensions, flange types, materials, weights, and ordering codes, presented in a multilingual format for clarity.

1. Product Description and Features

HTD® timing belt pulleys are engineered for secure shaft mounting using taper bushes. Available in pitch profiles 5M, 8M, and 14M, and widths ranging from 15mm to 85mm, these pulleys come with various flange options identified by codes (e.g., 3F, 4F, 5F, 8F, 9W). Materials include steel and cast iron variants, ensuring durability for power transmission.

2. Dimensional Specifications

Key dimensions provided for each pulley model include:

• Pitch Diameter (Dp): Defines the belt pitch circle diameter.
• External Diameter (De): Overall pulley diameter.
• Flange Diameter (Df): Diameter of flange where applicable.
• Hub Diameter (Dm): Diameter of the hub section.
• Internal Bore Diameter (Di): Size of the bore for shaft fitting.
• Flange Thickness (F) and Width (S): Dimensions related to flange size.
• Maximum Bore Diameter: Largest allowable bore for mounting.
• Weight: Pulley mass in kilograms.

Each pulley is identified by unique codes combining size, pitch, width, and flange type to facilitate precise ordering.

3. Flange Types and Codes

Flanges are essential for belt retention and pulley stability. Various flange designs are coded (e.g., 3F, 4F, 5F, 7A, 8F, 8WF, 9W, 9A), with some pulleys offered without flanges for specific applications.

4. Material Specifications

Pulleys are manufactured from steel and cast iron (including grey cast iron), selected to balance strength, durability, and weight according to application needs.

5. Series Specific Data Highlights

• 5M-15 Series: Small pulleys, pitch diameters ~54–216 mm, widths 15 mm, max bore up to 50 mm, weights 0.25–3 kg.
• 8M-20 Series: Medium pulleys, pitch diameters 56–366 mm, widths 20 mm, max bore up to 60 mm, weights up to 4.8 kg.
• 8M-30 Series: Larger pulleys, pitch diameters 56–366 mm, widths 30 mm, max bore up to 60 mm, weights up to 9 kg.
• 8M-50 Series: Larger sizes, pitch diameters 71–488 mm, widths 50 mm, max bore up to 90 mm, weights up to 22 kg.
• 8M-85 Series: Heavy-duty, pitch diameters 86–488 mm, widths 85 mm, max bore up to 26 mm, weights up to 31.5 kg.
• 14M-40 and 14M-55 Series: Large pitch pulleys, pitch diameters 124–962 mm, widths 40 mm and 55 mm, max bore up to 90 mm, weights 1.5–19 kg.
• 14M-85 Series: Largest pulleys, pitch diameters 86–488 mm, widths 85 mm, max bore up to 26 mm, weights up to 28.5 kg.

6. Identification Codes and Ordering

Unique codes combining size, pitch, width, and flange type enable accurate identification and ordering of pulleys, ensuring compatibility with taper bushes and application requirements.

7. Summary of Critical Parameters and Recommendations

• Select pulley size matching the required pitch diameter and width for the belt and application.
• Choose flange type based on belt retention needs and mechanical constraints.
• Verify maximum bore size compatibility with shaft and taper bush dimensions.
• Consider material choice for strength and weight balance.
• Use provided identification codes for precise ordering and specification matching.

8. Additional Technical Data

Conclusion

This document is a comprehensive reference for selecting HTD® timing belt pulleys with taper bushes, providing essential dimensional data, material specifications, flange options, and ordering codes. It supports correct pulley selection and installation for reliable mechanical power transmission.