Company Overview and Product Range

CHIORINO S.p.A., founded in 1906 in Biella, Italy, is a global leader specializing in conveyor and transmission belts. Since 2011, the company expanded into polyurethane and rubber timing belts designed for high reliability across diverse industrial applications. The company focuses on specialization, flexibility, and continuous technological innovation to meet evolving market demands.

Product Categories and Features

• Rubber Timing Belts reinforced with fiberglass cords
• Polyurethane Timing Belts with Kevlar or steel cords
• Flat Transmission Belts
• Conveyor and Process Belts
• Rubber Aprons

These products are engineered for high dynamic performance and minimal power loss.

Polyurethane Timing Belts

These belts are endless, maintenance-free, and suitable for environments with wide temperature variations. Available in multiple tooth pitches (e.g., T2.5, T5, T10, T20), they come with detailed specifications for tooth count and belt length.

Open-End Polyurethane Timing Belts

Offered with tight tolerances and excellent dimensional stability, these belts can have optional polyamide coatings on the back or tooth face. Available as open length rolls or endless jointed belts, they cover a broad range of standard widths and tooth profiles.

Profiles and Dimensions

Extensive tables specify standard widths, pitches, tooth heights (H, H1), and lengths for profiles such as HTD3M, HTD5M, HTD8M, HTD14M, STD5M, STD8M, STD14M, XL, L, H, XH, F1, F2, F2.5, F3, Eagle series, and RTD series. These profiles address varying load, speed, and environmental requirements.

Special Features and Applications

• RTD 14M XHPL profile designed for heavy-duty synchronous lifting
• Total Protection (TP) belts with no tooth gaps to prevent corrosion
• Helical offset tooth belts reduce noise and enable self-tracking without pulley flanges
• Polyurethane flat belts for non-synchronous drive applications, available double-sided on demand
• Chiorino-flex endless belts manufactured without splices or welding, suitable for high load and speed; special cords include high performance (CH-HPL), high flexibility (CH-HFE), stainless steel (CH-INOX), and aramid (CH-ARAMID)

Technical Support and Customization

CHIORINO provides technical assistance and customization options such as ground finishes, holes, and coatings to meet specific customer requirements.

Critical Parameters Summary

• Belt lengths range from a few hundred millimeters to over 19,000 mm depending on profile and pitch
• Standard widths typically range from 4 mm up to 150 mm or more
• Tooth pitches include 2.5 mm, 5 mm, 8 mm, 10 mm, 14 mm, 20 mm, among others
• Tooth heights (H and H1) are specified per profile for pulley compatibility
• Minimum pulley teeth and idler diameters are provided to ensure proper belt operation

Idler Recommendations and Installation Guidelines

For fixed center distances, it is recommended to apply strain and increase the number of teeth engaged on the small pulley. A toothed idler on the inside (loose side) of the belt is preferred over back side idlers to reduce noise and prevent uneven wear. Inside flat idlers are discouraged due to noise and wear issues.

• Idler diameter must be at least equal to the small pulley diameter
• Idler position must satisfy: 2 × (small pulley diameter + large pulley diameter) < center distance
• Idlers must be mounted on rigid supports for stability
• Idler width should be equal or greater than pulley width
• Idlers should be placed on the loose side of the belt drive

Flexibility and Minimum Idler Diameter by Belt Type and Profile

Detailed tables specify minimum number of teeth and idler diameters for various belt types and cord materials (standard, aramid, stainless steel, HPL, HFE). For example, T5 standard belts require a minimum of 10 teeth and 30 mm idler diameter, while aramid cords require 10 teeth and 18 mm idler diameter. Larger profiles like T20 or HTD14M require idlers up to 250 mm diameter or more.

Chiorino Rubber Timing Belts Characteristics

Rubber timing belts feature single or double-sided teeth profiles reinforced with fiberglass cords to minimize elongation and enhance flexibility. Chloroprene rubber provides wear resistance, and fabric tooth surfaces extend service life.

Standard Belt Lengths and Teeth Counts for MXL and XL Rubber Timing Belts

• MXL belts range from 40 to over 2000 teeth, lengths from ~81 mm to over 4000 mm
• XL belts cover 23 to 254 teeth, lengths from ~117 mm to over 760 mm
• Double-sided belts available from 150XL upwards, subject to minimum order quantities
• L (rubber) belts also listed with teeth counts and lengths (e.g., 98L with 26 teeth and 247.65 mm length)

Overview of Rubber Timing Belts by Type

• XL (3.25 mm pitch): 26 to 44 teeth, 247.65 mm to 419.10 mm length
• L (5.08 mm pitch): 37 to 558 teeth, 342.90 mm to 5314.95 mm length; double-sided available from 160L
• H (9.525 mm pitch): 37 to 472 teeth, 469.90 mm to 4495.80 mm length; double-sided available
• XH (14.3 mm pitch): 38 to 200 teeth, 844.55 mm to 4445.00 mm length
• T2.5, T5, T10 (trapezoidal profiles): various teeth counts and lengths (e.g., T5 from 37 to 560 teeth)
• HTD 2M (curved tooth profile): 38 to 300 teeth, 78 mm to 3000 mm length

Recommendations and Notes

• Double-sided belts available for L and H types from certain lengths; MOQ applies
• Selection should consider pitch, length, and load capacity per application
• Precise teeth count and length matching is critical for mechanical performance

Timing Belts Specifications

Detailed data for HTD 8M, HTD 14M, STD 3M, STD 4.5M, STD 5M, STD 8M, and STD 14M series belts are provided, including teeth counts and lengths. Some belts are available double-sided from specific lengths with MOQ.

V-Belts Overview

Chiorino offers classical, narrow, and cogged raw edge V-belts designed for demanding drives requiring space and weight reduction. Textile wrapping protects against heat, oil, and ozone.

Types and Sections

• Classical V-Belts: Z, A, B, C, D sections
• Narrow V-Belts: SPZ, SPA, SPB, SPC sections
• Cogged Raw Edge V-Belts: AX, BX, CX, XPZ, XPA, XPB, XPC, 3VX, 5VX sections

Technical Characteristics

Properties

• Low-stretch cords for extended lifetime and performance
• Textile wrapping for protection against heat, oil, and ozone
• UNISET technology ensures dimensional stability and precise fit
• Operating temperature range: -20°C to +70°C (up to +80°C for cogged belts)

Poly V® Belts

Poly V belts have lengthwise grooves engaging with pulley grooves for even tension distribution. Available in PL and PJ sections with effective lengths from ~197 mm to over 7000 mm and maximum ribs up to 190. Custom types (PH, PK, PM) available on request.

Coatings and Special Covers

Various coatings are offered to reduce noise, modify friction, or serve conveying functions. Coatings differ by raw material, thickness, color, hardness (Shore A), and pulley multiplier. Types include polyamide, polyurethane, rubber, silicon, cellular and sponge rubbers, and special antistatic coatings.

Pulleys

Standard and custom pulleys are manufactured to ISO specifications, compatible with RTD, Metric, Poly Chain GT, HTD, and Imperial belt series.

Company and Contact Information

CHIORINO S.p.A. is headquartered in Biella, Italy, with subsidiaries worldwide including Germany, France, Benelux, Belarus, UK, Spain, Brazil, Poland, Romania, Hungary, USA, South Africa, Australia, and New Zealand. Contact details are provided for each location.

Additional Services and Customer Questionnaire

The document includes a questionnaire for customers to specify timing belt requirements such as material, pitch, quantity, length, width, thickness, application type, industry, pulley diameter, and special requests like coatings, grinding, and profiles.

Summary of Critical Information

• Extensive range of timing and V-belts with precise dimensional data
• Specialized coatings and covers tailored to application needs
• Dimensional stability ensured by UNISET technology
• Wide operating temperature range and environmental protection
• Global presence with comprehensive technical support

This document serves as a comprehensive technical catalog and specification guide for CHIORINO's timing and transmission belts, essential for engineers and procurement specialists to select appropriate belt types and dimensions for diverse industrial applications.