APPLICATIONS
In
recent times, the demand for stainless components has increased
considerably. New types of automatic machinery and new hygienic
specifications, especially in food processing, have made the application
cases more and more frequent. In addition to the need of the food,
packaging and pharmaceutical industries, corrosion resistance requirements
also are found in ship-building, off-shore oil equipments, for textile
and fabric finishing machinery as well as chemical industry.
THE
MANUFACTURING PROGRAMME
The
RODOBAL range complies with the DIN 648K dimensional standards.
For each size, there are different types available, however, made
of various combinations of material and using different machining
techniques. Corrosion resistance demands may vary considerably,
to deal with anything from bland corrosion caused by exposure to
weather to much more severe corrosion, typical of certain textile
treatments. To provide a rational and ideal solution -even in terms
of costs- for this requirements variety, the RODOBAL manufacturing
range includes three main sub-types of stainless rod ends: STAIN-PROOF
(units RF..SEI, RM..SEI) STAINLESS (units RF..SEJR, RM..SEJR) EXTRA
STAINLESS (RF..SEJR.316, RM..SEJR.316)
GENERAL
FEATURES
Rod
ends belonging to the three sub-series have all the HEAVY DUTY -
MAINTENANCE FREE construction features. The rod end body (marked
as no. 1 in the sketch below) contains a spherical bearing made
of a unfractured, solid bushing (no. 2, called “race”) and a spherical
inner ring (no. 3) The inner concave surface of the race is lined
with an anti-friction insert (no. 4) composed by a metallic fabric
of bronze (or stainless steel) wire, coated with PTFE (Teflon).
The rod end body is made out of forged, heat treated Aisi 431 stainless
steel; the race is out of special bronze CuSn8 or stainless Aisi
316Ti steel. this "E" is the RODOBAL suffix unit for MAINTENANCE
FREE units.
SPECIFIC
FEATURES
Three
degress of corrosion resistance are possible, depending on the kind
of steel used for the spherical inner ring (no. 3): carbon steel
100Cr6, hardened, ground and hard -chrome plated, for the STAINPROOF
units stainless steel AISI 420 hardened and ground, for STAINLESS
units stainless steel AISI 316, ground, for EXTRA STAINLESS units
Corrosion resistance degree is medium for the first type (suitable
for 75% of the application cases), high for the second type (20%)
and maximum for the the third type with AISI 316 inner ring. Units
of this third type, female rod ends RF..SEJR.316 and male RM..SEJR.316,
are used in most demanding conditions (i.e. fertilizer sacking.
The AISI 316 stainless steel inner ring cannot be heat treated,
so the load bearing capacity of this rod end type is only about
20% of the load capacity of similar units with hardened steel inner
ring.
Other
special features, i.e. 100% AISI 316 construction or special sizes,
special threads on request. For less demanding corrosion conditions,
ask for information about oxide-protected, chrome or nickel plated
rod ends
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