Compression spring D-308B Spring steel Ø 3.2 x 18 x 120 mm

Name: D-308B - Compression springs
SKU: D-308B
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	3.2	mm	Wire diameter
Di	-	mm	Inner coil diameter
D	18	mm	Mean coil diameter
De	21.2	mm	Outer coil diameter
Dd	14	mm	maximum diameter of mandrel
Dh	22.3	mm	minimum diameter of bush
L0	120	mm	unstressed spring length
Lk	83.56	mm	buckling length
Fn	637.425	N	maximum force in static use
Ln	76.5	mm	Minimum length in static use
sn	43.5	mm	Maximum spring deflection in static use
Fndyn	514.336	N	maximum force in dynamic use
Lndyn	84.9	mm	Minimum length in dynamic use
shdyn	13.28	mm	Maximum stroke in dynamic use
S	9.344	mm	pitch of spring
n	12.5	pc.	number of active coils
nt	-	pc.	total number of coils
R	14.653	N/mm	Spring rate
Weight	52.1268	g	weight of one spring
Fntol	34.78	N	(+/-) tolerance of maximum force in static use
Fndtol	34.71	N	(+/-) tolerance of maximum dynamic force
Detol	0.35	mm	(+/-) tolerances of outer coil diameter
L0tol	1.78	mm	(+/-) tolerance of unstressed spring length
Price group	O	-	price group
F1tol	-	N	(+/-) tolerance of prestressed spring force
F2tol	-	N	(+/-) tolerance of loaded spring force