Compression spring D-389H Spring steel Ø 7 x 68 x 254 mm

Name: D-389H - Compression springs
SKU: D-389H
Availability: InStock

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Formula symbols	Value	Unit	Description
Material	EN 10270-1	-	Type of material
Spring ends	Closed and ground	-	Spring ends
F1		N	prestressed spring force
L1		mm	Prestressed spring length
s1		mm	Prestressed spring deflection
F2		N	Loaded spring force
L2		mm	Loaded spring length
s2		mm	Loaded spring deflection
d	7	mm	Wire diameter
Di		mm	Inner coil diameter
D	68	mm	Mean coil diameter
De	75	mm	Outer coil diameter
Dd	59	mm	maximum diameter of mandrel
Dh	77.5	mm	minimum diameter of bush
L0	254	mm	unstressed spring length
Lk		mm	buckling length
Fn	1289.187	N	maximum force in static use
Ln	96.56	mm	Minimum length in static use
sn	157.44	mm	Maximum spring deflection in static use
Fndyn	1223.458	N	maximum force in dynamic use
Lndyn	104.59	mm	Minimum length in dynamic use
shdyn	67.87	mm	Maximum stroke in dynamic use
S	26	mm	pitch of spring
n	9.5	pc.	number of active coils
nt		pc.	total number of coils
R	8.189	N/mm	Spring rate
Weight	747.3483	g	weight of one spring
Fntol	62.8	N	(+/-) tolerance of maximum force in static use
Fndtol	61.9	N	(+/-) tolerance of maximum dynamic force
Detol	1.2	mm	(+/-) tolerances of outer coil diameter
L0tol	5.32	mm	(+/-) tolerance of unstressed spring length
Price group	AR	-	price group
F1tol		N	(+/-) tolerance of prestressed spring force
F2tol		N	(+/-) tolerance of loaded spring force