Page 7 - Craft Bearing Catalog
P. 7
Proven Solutions Bearing Components and Features
Bearing Company Inc.
hE ComPLETE BEARING consists of desired high lubricity and stiffness qualities. The
components that can be purchased cage joints for the zamak are a tongue and groove
Tseparately or as a complete pillow block. design and spring steel cage clips are supplied
The components include the bearing assembly to fasten the cage halves together at installation.
(the inner race, the clamp collars that hold the Craft roller cages 4 inch bore and over in S1
inner race halves in place, the roller cage with series, and in all S2 and S3 series bearings, are
rollers, and the outer race); the seals which made from 932 bearing bronze as standard. Cage
protect the bearing from dirt and contaminants; joining faces are made with a special “Z” cut to
the cartridge which contains the bearing create an overlapping design. The cage halves
assembly; and the housing (pedestal or flange) are secured by counter sunk high tensile socket
units which support the cartridge and holds cap screws, and the screws come with a thread-
cartridge and bearing assembly in the correct locking compound built into the screw (Nylok)
position and height.
that ensures retention of the screws for the life
n The Bearing Assembly of the bearing.
All of Craft’s roller cages are designed
Rollers, inner race and outer race are
made from through-hardened 52100 bearing with cage pockets to encapsulate the rollers
steel. With Craft’s standard through-hardened to retain lubricant and ensure accurate roller
practices, this high carbon chrome, low alloy steel guidance while possessing extremely low wear
provides excellent load bearing strength and characteristics. Once the cage halves are mated
wear characteristics, superior surface quality, and secured around the inner race, the units
and an inherent ability to withstand impact load perform as a solid roller cage.
conditions. Strict statistical process control used n Triple Labyrinth Seals
throughout manufacturing assures tolerance
accuracy, fine surface finish, and consistent Craft’s aluminum triple labyrinth (ATL) seals
high quality. are made from 6061-T6 marine grade/aircraft
grade aluminum. The seal bore is machined to
Clamp Collars are made from various mild accept and retain a double row of molded O-ring
steels—dependent upon bearing size and series. material. This provides 100% sealing between
The materials used are chosen for their ability the shaft and the bore, as well as allows for shaft
to be hardened yet retain the ductility required movement for expansion and contraction during
for the repetitive stresses involved with dynamic operation without compromising the seal. By
and constantly varying loads, for millions of design, the seals rotate with the shaft—this
stress cycles. The clamp collars’ seat serves two prevents shaft wear at the seal/shaft mating seat,
purposes, to lock the inner race to the shaft and ensuring long life and full sealing capability.
to guide the rollers along the inner race.
Depending on the application, various
Roller Cage Assembly is available in two O-ring materials are available as an application
types. In the S1 series to 3½ inch group, Craft may require. The seals can be made from
roller cages are made from Zamak 3 or aluminum other materials such as UHMW, bronze, or
material. Zamak is zinc-aluminum alloy with stainless steel.
C Craft Bearing Company, Inc. n Newport News, Virginia n www.craftbearing.com 5
Craft Bearing Company, Inc. n Newport News, Virginia n www.craftbearing.comraft Bearing Company, Inc. n Newport News, Virginia n www.craftbearing.com
Craft Bearing 2017 Catalog + Spe5 5 8/14/17 1:51:00 PM
