CHIARAVALLI
PLATEWHEELS FOR ROLLER CHAINS
PLATEWHEELS FOR ROLLER CHAINS
The range of platewheels designed for chains manufactu-
red by our Company provides an all-round solution to the
needs of industry in the sector of flexible mechanical tran-
smissions and is the result of a manufacturing process that
is designed to achieve the top in terms of technical and
quality performance.
Our production programme includes sprockets and whe-
els designed for chains, produced in compliance with the
principles and with the most recent Standards and Interna-
tional Unified Standards: UNI, ISO, DIN, ANSI, etc.
However, the standards define a profile with minimum
dimensions and a profile with maximum dimensions for
the wheel space for chains and rollers and the actual profi-
le must lie within these values.
There is the option of selecting proportioning criteria for
the profile, since the tolerances that the Standards leave to
the manufacturer’s discretion are quite wide. The profiles
can be optimised in terms of smooth transmission and the
tooth’s capacity to support greater stresses. This has led
to the systematic development of a series of standardised
profiles for which the geometry can be reproduced with
great precision by tools designed specifically by compu-
ter and the reference profile of which is protected by the
Company’s knowhow.
A valued feature of this optimised profile, which is a cha-
racteristic exclusive to CHIARAVALLI GROUP SpA, is that
of enhancing the “polygonal” chain wrap-around on the
sprocket and on the platewheel, reproducing the motion
discontinuity which is achieved even in the case of unfa-
vourable transmission ratios and centre distances.
As a result of this CHIARAVALLI GROUP SpA has been
able to include sprockets with a very low number of teeth
in its catalogue and production programme.
Respecting precision with limited machining errors is be-
neficial, even if the toothed wheel-chain set represents a
somewhat “basic” transmission solution.
This precision is assured by the systematic use of CNC
machines and technologies developed to minimise the
shearing stress and to improve the degree of surface finish.
The sprockets and wheels designed for chains included in
the catalogue are also manufactured in the version with
the “Taperlock” taper bush piece system particularly
favoured in applications that require easy assembly and
very precise centring tolerances.
Our sales programme is completed with single and multi-
ple roller chains, and special chains suitable for every in-
dustrial application and CHIARAVALLI GROUP SpA is also
able to manufacture sprockets and platewheels suitable
for chains in a specific execution, produced to drawing any
of material and with induction hardening and case-harde-
ning and hardening applied to steel wheels and sprockets.
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