Industrial shaft seals

gab.ru
Radial
Берг
shaftАБ seals
bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22
Hardness and surface treatment
The surface hardness of the counter surface
should normally be at least 55 HRC to EN
10109–1 (1995) or 600 HV and the hardened
depth should be at least 0,3 mm. Under
certain conditions, e.g. where speeds are low,
lubrication good and contamination absent,
counter surfaces having a lower hardness than
55 HRC may be suitable. Surfaces which are
nitrided, phosphated or have a galvanised layer
may also be suitable in special cases, but this
must be determined for each specific case.
In case the counter surface cannot meet the
demands outlined above, the use of a Speedi-
Sleeve is recommended. These wear sleeves
are made of stainless steel, have a surface
hardness of 95 HRB and a surface roughness
of 0,25 to 0,5 R a µm. Because they are
extremely thin walled, the seal chosen for the
nominal shaft diameter can still be used.
Detailed information on the Speedi-Sleeve will
be found in the section “Wear sleeves”.
Lead-in chamfers
In order to be able to install radial shaft seals
without damaging the seal lip it is recommended
that the shaft ends or shoulders
should be chamfered or rounded, see Table 10.
If the direction of installation is according to
Z the values given in Table 10 should be kept
to. If the direction of installation is Y then the
shaft end may be either rounded or chamfered.
If seals are to be installed over shaft
shoulders or ends which have not been
rounded or chamfered it is recommended that
a mounting sleeve be used; see section
“Mounting”.
gab.ru 74 Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22