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CONTI SYNCHRORIB Double-Sided Combined Belts

CONTI SYNCHRORIB are combined double-sided drive belts. One side consists of a timing belt (SYNCHRO), the other of a poly-V-belt (RIB). The timing belt ensures precise synchronous movement, and the ribbed side allows some minor slippage under shock loading.

The toothed side of the belts can be in HTD or STD profile. Depending on the power to be transmitted, they are available with glass cord tension member (STANDARD and CXP), or with aramid tension member (CXA). The ribbed belt side is in PK profile with a rib spacing of 3.56 mm. These are very special belts, produced in only a few specific lengths and widths, which are determined by the number of ribs.

AntistaticAntistatic – for compliance with requirements to ISO 9563. Less PAHThe trendsetters with less polycyclic aromatic hydrocarbons (PAH) for clean operation and protection of persons in case of long-term contact with the belt.


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Belts Available Dimensions

Profile Belt Length (mm)
HTD 8M 1760–2400
STD S8M 1552–2800
HTD 14M * 1778

* This profile is not included in the ContiTech product range for the CONTI SYNCHRORIB belt series. However, we can offer a product from another manufacturer.

Belts Construction


  1. Polyamide fabric
  2. Synthetic rubber teeth
  3. Glass cord tension member for STANDARD or CXP (aramid tension member for CXA)
  4. Synthetic rubber ribs

Belts Fields of Use

CONTI SYNCHRORIB belts have been specifically developed for driving mill table rollers. These rollers, which are grinding elements, rotate against each other at varying circumferential speeds.

These combined drive belts serve as an excellent alternative to double-sided timing belts, which are not only costly but also more susceptible to damage due to overloading and uneven loading.

Mill tables are primarily designed for grinding dry bulk materials. While they are mainly used for grinding grain in mills and feedstuffs, they can also be utilized for grinding corn, rice, chalk, certain spices, and chemical products, as well as for waste cleaning.

Belts Characteristics

  • Timing belts allowing minor slippage on the ribbed side
  • Temperature range depending on application, from −20 °C to +100 °C
  • Antistatic property according to ISO 9563
  • Moderately oil resistant
  • Ageing and ozone resistant
  • Suitable for tropical climates
  • Maintenance-free
  • Low in PAHs – category 2 according to AfPS-GS-2014-01-PAK (for CXP and CXA design)

Belts Code Description


Code Part Description

Timing belt profile


Belt length in mm

8M Timing belt tooth pitch in mm

Poly-V-belt profile


Belt width in mm (12 PK ribs: 12 × 3.56 = 42.72 mm)


Belt design with a glass cord tension member 


Belt type

Belts Certification


General factory certificates are not sufficient for belts used in potentially explosive atmospheres.

If a test report according to ISO 1813 and ISO 9563 is required for the application, it is necessary to inform us of the request for delivery of belts including the certificate when ordering them (when ordering belts via Eshop, please write this request in the "Note" field before by sending the order). The certificate is issued by ContiTech after the test in the production plant.

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Documents for Download

Drive Belts - Preview

Drive Belts

TYMA CZ Catalogue

Czech and English (PDF 4.54 MB)

Endless Timing Belts - Preview

Endless Timing Belts

ContiTech Catalogue

English and German (PDF 8.98 MB)



ContiTech Product Overview

English (PDF 613.45 kB)

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Belt Manufacturer Profile


Continental is the world’s largest specialist for rubber and plastics technology in the non-tire rubber sector. A division of Continental AG, the company develops and produces functional parts, components and systems for the automotive and other important industries.

ContiTech importance on immediate proximity to customers. ContiTech is active in 26 countries with 75 production sites and more than 40 R&D facilities and sales organizations. The customers around the world stand to profit: Greater safety. Higher efficiency. Closer proximity.

TYMA CZ, s.r.o., is the official distributor of Continental ContiTech Power Transmission Group.

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