Firestone EMDG198 248-2, Bead ring Dynamic Characteristics at 11.0 in. Design Height, 72.5 lbs

248-2

		Description	Assembly Order No.
	Style	Ribbed neck aluminum bead
248-2		rings (equal spacing),
		17/8 bolts, nuts, washers	WO1-358-9602
	Four
	Ply
	Bellows
Assembly weight			72.5 lbs.

Force to collapse to minimum height (@ 0 PSIG)..... 350 lbs.

40 (3/8-24) BOLTS

EACH RING

28-32 FT. LBS.

TORQUE

32.68 BOLT CIRCLE DIA.

37.4 MAX O.D.

AT 100 PSIG

HEIGHT

35.04 DIA.

VOLUME (WITHOUT BUMPER) CU IN. x 1000

10

5

	RECOMMENDED		Static Data
		AIRMOUNT
	DESIGN HEIGHT			B412
		11.0 INCHES
					125
Do not use Airstroke in
shaded area without					120
consulting Firestone
					115
				120 Psig
	Volume				110
	100 Psig
					105
					100
					95
				100 Psig
					90
					85	1000
				80 Psig	80
					75	x
					70
					65LBS
				60 Psig	60	FORCE
					55
					50
					45
			40 Psig		40
					35
					30
					25
				20 Psig	20
					15
					10
					5

MAX. HT.	14	12	10	8	6	MIN. HT.
16						4. 2

NOTE: The effective length of 17/8 bolt is 1.02” in this							HEIGHT IN.
					See page 12 for instructions on how to use chart.
bead ring.
Dynamic Characteristics at 11.0 in. Design Height					Force Table (Use for Airstroke® actuator design)
(Required for Airmount isolator design only)
						Volume		Pounds Force
Volume @ 100 PSIG = 9,815 in3			Natural		Assembly	@ 100
					Height	PSIG	@20	@40	@60	@80	@100
			Frequency		(in.)	(in3)	PSIG	PSIG	PSIG	PSIG	PSIG
Gage		Spring
Pressure	Load	Rate	CPM	HZ	13.0	11,386	12,660	26,460	41,020	55,290	69,700
(PSIG)	(lbs.)	(lbs./in.)
					11.0	9,815	15,200	30,830	47,720	63,890	79,730
40	30,830	6,746	88	1.46
60	47,720	9,549	84	1.40	9.0	8,090	16,890	34,210	52,080	69,850	87,790
80	63,890	12,423	83	1.38	7.0	6,243	18,210	37,030	55,570	74,410	93,230
100	79,730	14,989	81	1.36	5.0	4,304	19,270	38,820	58,730	78,570	98,180

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