End Closure Options; Crimped Bead Plates - Firestone EMDG198 User Manual

END CLOSURE OPTIONS

Each individual air spring data sheet shows a cross sectional
view of the most popular end closure option for that part. For
convoluted air springs 16 inches in diameter and less, and for
the reversible sleeve air springs, the Crimped Bead Plate
CONVOLUTED AIR SPRINGS
(#22 is shown)
REVERSIBLE SLEEVE
AIR SPRINGS
(1T15M-6 is shown)
THREADED HOLE May be used for attachment to
mounting surface. Not included in some pistons (See
individual data sheets for specific part configuration.)
6
attachment is shown. For convoluted air springs 17 inches in
diameter and larger, a Bead Ring attachment is shown . An air
spring of each variety, with proper terminology for each, is
shown on the following pages.

CRIMPED BEAD PLATES

AIR INLET
1
/ " NPT is standard.
4
parts. (See the data sheet order block on each specific
part).
BLIND NUT
3
/ -16 UNC thread x
8
depending on part size). Used for mounting the part.
UPPER BEAD PLATE
(9 gauge carbon steel, .149"). Permanently crimped to
bellows to form an airtight assembly which allows for leak
testing before the unit leaves the factory. Zinc/chromate
plated for rust protection.
GIRDLE HOOP
Wire wound type shown, molded into the bellows.
BELLOWS
Wall gauge is approximately
information.
LOWER BEAD PLATE
Usually the same as upper bead plate, except without air
inlet.
AIR INLET
able for most parts. (See the data sheet order block on
each specific part).
BLIND NUT
per each plate depending on part size). Used for mount-
ing the part.
BEAD PLATE (9 gauge carbon steel, .149").
Permanently crimped to bellows to form an airtight assem-
bly which allows for leak testing before the unit leaves the
factory. Zinc/chromate plated for rust protection.
BELLOWS Wall gauge is approximately
for detailed information.
BELLOWS END CLOSURE—(steel) Permanently
molded into the bellows (Except for styles 1T19L-7,
1T19L-11).
PISTON May be made of aluminum, steel, plastic or
hard rubber. Held to the bellows by a bolt which screws
into the bumper stud. For mounting, a long bolt may be
used coming up through the mounting surface. Or, a
short bolt may be used to attach the piston to the lower
end closure and then use the threaded holes in the pis-
ton to secure the assembly to the mounting surface. (A
piston long bolt is usually not included).
BUMPER STUD A permanent part of the bellows end
closure (and bellows). It has two functions:
1. The optional rubber bumper snaps over the outside.
2. The inside is a threaded hole (see data sheets for
thread dimension and depth) used to secure the
piston to the bellows.
3
/ " NPT is also available for most
4
5
/ " deep (two or four per each plate
8
1
/ ". See page 5 for detailed
4
1 3
/ " NPT is standard. / " NPT is also avail-
4 4
3 5
/ -16 UNC thread x / " deep (two or four
8 8
1
/ ". See page 5
4