Metallized Carbon Corp.'s Metcar 100 Series and 300 Series Bearing Assemblies are designed for
use in gypsum board and ceiling tile continuous dryers. These self-aligning,
bearing assemblies with carbon-graphite replaceable bearing cartridges are used
to hold the powered rollers in large continuous dryers that are used for curing
gypsum board and ceiling tile.
The 100 Series and the 300 Series bearing
assemblies are designed to permit the bearing cartridge to be replaced quickly
and easily even after years of exposure to the high temperatures inside the
dryer. Fast and easy bearing cartridge replacement is required in these dryers
because of the short down time allowed for these large, high production dryers.
The Metcar 100 Series bearing
assemblies are designed to enable fast bearing cartridge replacement from the
axial direction (that is when the bearing cartridge can slid over the end of
the shaft). The 100 Series Bearing Cartridge slides onto the end of
shaft, ears on the bearing cartridge flange slide into slots in the
housing, the cartridge is rotated ninety degrees, and a circular clip lock is
used to block the slots so the cartridge is secured in the housing
The Metcar 300 Series bearing
assemblies are designed to enable fast bearing cartridge replacement from the
radial direction. This is necessary when the bearing assembly is located behind
the roller drive sprocket or behind locking collars so it is not possible to
slide the bearing cartridge over the shaft. The bottom half of the 300 Series
Split Bearing Cartridge slides under the shaft and a slot on the bearing
cartridge flange engages with a stud in the housing. The top half of the 300
Series split bearing cartridge is placed over the shaft and an "easy clip" wire
spring is used to hold both halves of the split cartridge in place.
Optional bearing cartridges are
available to provide for different cartridge lengths and to accommodate thrust
load on the end of the bearing cartridge. The 100 and 300 series bearing
assemblies are available with several options for mounting to the dryer support
frame. These including; saddle mounted, offset mounted, vertical mounted,
horizontal mounted, angle mounted, flush mounted, wing mounted and flange mounted.
Housings and bearing cartridges retaining rings are fabricated from zinc plated
steel.
The 100 and 300 Series
Bearing cartridges are available with four different grades of Metcar,
self-lubricating carbon-graphite material. Metcar Grade 1515 (copper
impregnated, carbon-graphite) is recommended for dryer zones with temperatures
up to 700 F (371C). Metcar Resistox Grade 2500 is recommended for dryer zones
with temperatures from 700 to 1000 F (371 to 538 c). Metcar Resistox Grades
9200 and 9800 are recommended for dryer zones with temperatures from 1000 to
1100 F (538 to 593 C).
