NORD Drivesystems B1000 - Manual (Page 27)

www.nord.com A25 G1000 – Subject to Change Without Notice
INTRODUCTION
VL2 – Spread Bearing Design
NORD offers reinforced output shaft bearings with
increased bearing distance. The lower bearing is
a oversized, double row spherical bearing, which
absorbs high overhung and thrust loads while provid-
ing a longer bearing service life. The spherical roller
bearing is especially useful in compensating for align-
ment errors in long agitator shafts. The VL2 spread
bearing design is commonly used for shredders,
mixers, overhead conveyors or applications requiring
increased bearing load carrying capacities. Included
with the VL2 design is a grease fi tting for the lower
bearing and a removable plug to allow excess grease
to purge from the bearing cavity.
VL3 – Spread Bearing Design with
Oil Safe Dry Cavity
The VL3 dry cavity design adds additional oil leak pro-
tective measures to the VL2 spread bearing design.
NORD’s Quadralip
TM sealing system prevents oil from
leaking from the gearbox into the VL2 fl ange. If in
any case oil does leak past the Quadralip
TM seals, it
would fl ow down to the oil slinger mounted onto the
shaft. As the shaft rotates, the oil will sling off into
the dry cavity. A sight tube is provided for dry cav-
ity inspection. At the bottom of the spread bearing
fl ange is greased packed, double lip seal.
NORD can calculate the service life upon request.
The following values are required for calculation:
• Rated Power P [hp]
• Output Speed n
2
[rpm]
• Overhung Force F
r
[lb]
• Axial Force (thrust) F
a
[lb]
• Distance from the point
of overhung force to the
fl ange support C [in]
• Required Service Life L
h
[h]
Quadrilip™ Sealing System y
Oil Slinger
Dry Cavity
Spherical
Rol
p
ler Bearing
Output
Flan
p
ge
Grease rr Pa PP cked kk
Double Lip Seal
Sight
Tube
g g Grease Fitting
Fr
Fa
C
Gear Unit
Options
in
Clincher™ Shaft Mount Gear Unit Motors
Helical-Bevel Gear Unit Motors
SK ..82 AF VL2
SK ..82 AF VL3 SK ..82 VF VL2
SK ..82 VF VL3 SK ..82 AFSH VL2
SK ..82 AFSH VL3
SK 90..1 AF VL2
SK 90..1 AF VL3 SK 90..1 VF VL2
SK 90..1 VF VL3 SK 90.1 AFSH VL2
SK 90.1 AFSH VL3
Ц 384 Ц 385 Ц 386
Ц 562 Ц 563 Ц 564
in in
in in in