CONTI SYNCHRORIB Double-Sided Combined Belts
CONTI SYNCHRORIB are combined double-sided drive belts. One side consists of a timing belt (SYNCHRO), while the other side is a poly-V belt (RIB). The timing belt ensures precise synchronous motion, and the ribbed side allows limited slippage under shock loading.
The toothed side of the belts can be in HTD or STD profile. Depending on the required power transmission, they are available in standard design with glass-cord tension member, in reinforced design (CXP), or – on request – 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 only in a few defined lengths and widths, determined by the number of ribs.
HTD 8M
STD S8M
Belt Construction
- Polyamide fabric
- Synthetic rubber teeth
- Glass-cord tension member in standard or CXP design (on request aramid tension member – CXA design)
- Synthetic rubber ribs
Typical Applications
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.
Properties
- 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)
Belt Code Description
Example:
STD S8M-1552-107 PK-30 CXP CONTI SYNCHRORIB (1552 S8M CXP PK30)
The first part represents the standard belt marking system we use across all manufacturers:
| Code Part | Description |
|---|---|
| STD | Timing belt profile |
| S8M | Timing belt tooth pitch in mm |
| 1552 | Belt length in mm |
| 107 | Belt width in mm (30 PK ribs: 30 × 3.56 = 106.80 mm) |
| PK | Poly-V belt profile |
| 30 | Number of ribs The number of belt ribs (elevations) = number of grooves on the pulley. |
| CXP | Belt design |
| CONTI SYNCHRORIB | Belt type |
The marking inside the parentheses corresponds to the manufacturer's catalog:
| Code Part | Description |
|---|---|
| 1552 | Belt length in mm |
| S8M | STD timing belt profile and its tooth pitch in mm |
| CXP | Belt design |
| PK | Poly-V belt profile |
| 30 | Number of ribs The number of belt ribs (elevations) = number of grooves on the pulley. |
Certificates
- Factory Electrical Conductivity Certificate of Belts According to ISO 1813 and ISO 9563 (pdf, 104.90 kB)
- ContiTech Explanation of ATEX Certification (pdf, 11.96 kB)
Notice
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.
Documents for Download
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.


