COIL SPRINGS

Category	Characteristics	Type		Outer Diameter		Overall Length		Allowable Deflection	LoadN{kgf}
		Part Number	Color	min.	max.	min.	max.		min.	max.
Wire Springs	•Designed to have a consistent spring constant against the diameter. (Load varies depending on the overall length.)	WY (FA)	-	φ3	φ16	5	70	75% (1 million shots)	0.38 {0.04}	10.3 {1.05}
		WR (FA)	-	φ3	φ27	5	90	60% (1 million shots)	0.9 {0.09}	23.5 {2.4}
		WF (FA)	-	φ3	φ27	5	90	45% (1 million shots)	1.1 {0.11}	35.3 {3.6}
		WL (FA)	-	φ2	φ27	5	100	40% (1 million shots)	0.98 {0.1}	117.7 {12.0}
		WT (FA)	-	φ3	φ27	5	80	40% (1 million shots)	2.9 {0.3}	125.5 {12.8}
		WM (FA)	-	φ3	φ27	5	100	35% (1 million shots)	3.4 {0.4}	171.6 {17.5}
		WH (FA)	-	φ4	φ27	5	100	30% (1 million shots)	4.9 {0.5}	441.3 {45.0}
		WB (FA)	-	φ3	φ27	5	100	25% (1 million shots)	4.9 {0.5}	735.5 {75.0}
		NWL (Inner dia. st.) (FA)	-	φ5.5 (Inner dia.)	φ16.6 (Inner dia.)	30	60	40% (1 million shots)	13.7 {1.4}	27.5 {2.8}
		NWM (Inner dia. st.) (FA)	-	φ5.5 (Inner dia.)	φ16.6 (Inner dia.)	30	60	32% (1 million shots)	20.6 {2.1}	34.3 {3.5}
		WP (Long type) (Press)	-	φ11.5	φ17	100	500	70% (1 million shots)	21.3 {2.2}	34.3 {3.5}

Temperature to be used
Data shown in the catalog on load, etc are based on measurements made at room temperature(40A or less), and depending on various conditions, use at temperatures above room temperature may lead to a reduction in load and the number of cycles for durability.
The products are to be used in temperatures of 80°C or less. The heat resistance temperature(round wire:120°C, irregular wire:200°C)for springs is higher that the temperatures for use, but a great reduction in functionality is expected at temperatures above the temperatures for use.Except Stainless type.
For the maximum allowable deflection of a heatproof spring at high temperature, see the table on the page at right.

Coil spring painting
MISUMI coil springs are painted for identification and to prevent corrosion.
Possible to peel the paint by alteration(excluding round wire).PDF (152KB)

Allowable deflection
Do not use with a greater deflection than the maximum values or load and durability will be reduced, and may result in breakage.
If round wire coil springs have even a single stroke larger than the maximum deflection, the L dimension is reduced.

Calculation of spring load
Load=spring constant×deflection
N=N/mm × Fmm(international units)
kgf=kgf/mm × Fmm
(kgf=N×0.101972)

Category		Characteristics	Type		Outer Diameter		Overall Length		Allowable Deflection			Load N{kgf}
			Part Number	Color	min.	max.	min.	max.	Room Tempera- ture Used	150°C Used	200°C Used	min.	max.
		•Designed to have a consistent spring constant against the diameter. (Load varies depending on the overall length.) •Operating temperature limit200°C	WFH	-	φ4	φ18	5	100	60% (1 million shots)	54% (1 million shots)	48% (1 million shots)	1.5 {0.15}	58.8 {6.0}
			WLH	-	φ4	φ18	5	100	50% (1 million shots)	45% (1 million shots)	40% (1 million shots)	2.5 {0.25}	147.1 {15.0}
			WMH	-	φ4	φ18	5	100	40% (1 million shots)	36% (1 million shots)	32% (1 million shots)	3.9 {0.4}	196.1 {20.0}
			WHH	-	φ4	φ18	5	100	35% (1 million shots)	32% (1 million shots)	28% (1 million shots)	5 {0.5}	514.8 {52.5}
		•For high deflection •Designed to have a consistent spring constant against the diameter •Operating temperature limit200°C	SWY (Ultra high deflection)	Pastel green	φ11	φ42	20	300	65% (1 million shots)	52% (1 million shots)	46% (1 million shots)	29.4 {3.0}	392.3 {40.0}
									70% (300,000 shots)	56% (300,000 shots)	49% (300,000 shots)	31.4 {3.2}	425.6 {43.4}
			SWU (Super high deflection)	Light blue	φ10.5	φ43	15	300	60% (1 million shots)	48% (1 million shots)	42% (1 million shots)	68.6 {7.0}	588.4 {60.0}
									65% (300,000 shots)	52% (300,000 shots)	46% (300,000 shots)	73.9 {7.5}	637.4 {65.0}
			SWR (High deflection)	Ivory	φ10.5	φ50	15	400	50% (1 million shots)	40% (1 million shots)	35% (1 million shots)	78.5 {8.0}	1323.9 {135.0}
									55% (300,000 shots)	44% (300,000 shots)	39% (300,000 shots)	87.2 {8.8}	1456.3 {148.5}
			SWS (Medium deflection)	Orange	φ10.5	φ52	20	300	40% (1 million shots)	32% (1 million shots)	28% (1 million shots)	87.2 {8.8}	1569.1 {160.0}
									45% (300,000 shots)	36% (300,000 shots)	32% (300,000 shots)	97.1 {9.9}	1765.2 {180.0}
			SWN (Low deflection)	Dark brown	φ14.5	φ37	20	300	30% (1 million shots)	25% (1 million shots)	20% (1 million shots)	274.6 {28.0}	882.6 {90.0}
									35% (300,000 shots)	30% (300,000 shots)	25% (300,000 shots)	304.0 {31.0}	980.7 {100.0}

Category		Characteristics	Type		Diameter Outer(Inner)		Overall Length		Allowable Deflection	Load N{kgf}
			Part Number	Color	min.	max.	min.	max.		min.	max.
Irregular Wire Springs	For heavy load	•Designed to have a consistent spring constant against the diameter.	SWC (Extra minimal load) (Press)	Purple	φ6(φ3)	φ30(φ15)	15	200	50% (1 million shots)	27 {2.8}	392 {40.0}
									60% (300,000 shots)	32 {3.3}	471 {48.0}
			SWF (Minimal load) (Press)	Yellow	φ6(φ3)	φ70(φ38.5)	10	500	40% (1 million shots)	47 {4.8}	3136 {320}
									50% (300,000 shots)	59 {6.0}	3920 {400}
			SWL (Light load) (Press)	Blue	φ6(φ3)	φ70(φ38.5)	10	350	32% (1 million shots)	63 {6.4}	4782 {488}
									40% (300,000 shots)	78 {8.0}	5978 {610}
			SWM (Medium load) (Press)	Red	φ6(φ3)	φ70(φ38.5)	10	350	25.6% (1 million shots)	78 {8.0}	6664 {680}
									32% (300,000 shots)	98 {10}	8330 {850}
			SWH (Heavy load) (Press)	Green	φ6(φ3)	φ70(φ38.5)	10	350	19.2% (1 million shots)	110 {11}	10046 {1024}
									24% (300,000 shots)	137 {14}	12557 {1280}
			SWB (Extra heavy load) (Press)	Brown	φ6(φ3)	φ70(φ38.5)	10	350	16% (1 million shots)	142 {14}	13655 {1392}
									20% (300,000 shots)	177 {18}	17069 {1740}
			SWG (Hyper heavy load) (Press)	Black	φ10(φ5)	φ50(φ25)	15	200	16% (1 million shots)	392 {40}	9807 {1000}
									20% (300,000 shots)	490 {50}	12258 {1250}
	For anticorrosive and heat proof		SWUF SWUL SWUM SWUH (Press)	- (no painting)	φ10(φ5)	φ30(φ15)	20	60