[Cleaned & Packaged] Round Wire Coil Spring - O.D. Referenced, Stainless Steel, UM/UH

Closed Ends (Both Ends Not Ground*) Closed Ends (Both Ends Ground)
O.D. D ø10 or Less 0-0.5 mm Free Length L 50 or Less ±1 mm
ø12 or More 0-0.8 mm 60 or More ±2 mm

Type		Body Material	Cleaning Method
Max. Deflection (Fmax.)
F = L × 35%	F = L × 30%	[M] Material	Cleaning Method	Cleaning Environment	Packaging Type	Packing Environment
SL-UM	SL-UH	EN 1.4301 Equiv. (WPB) (Spring constant ±10%)	Degreasing	General environment	Anti-rust packing	General environment
SH-UM	SH-UH		Precision cleaning	Class 1,000*	Degassing double packing	Class 10**
SHD-UM	SHD-UH		Electrolytic polishing + precision cleaning

*US FED STD 209E, ISO 14644-1 ISO 6 Equiv.
**US FED STD 209E, ISO 14644-1 ISO 4 Equiv.
[!] Maximum deflection differs from above for some sizes. See the specification table for details.
[ ! ] Products are packed by order quantity. Ex. If the order is for 20 pieces, they are packed in one package (incl. 20 pieces).
[ ! ] See the details of degreasing, precision cleaning, and electrolytic polishing shown at the bottom of the specification table.

■UM: Fmax. (allowable deflection) = L × Fa%

Part Number		d	Solid Length (Reference Value)	F max.	N{kgf} max.		Fa%
Type	D−L
SL-UM SH-UM SHD-UM	4-5*	0.4	2.2	1.75	3.4	{0.35}	35
	10*	0.5	4.9	3.5	6.8	{0.7 }
	15	0.55	7.5	5.25	10.3	{1.05}
	20	0.6	11.1	7	13.7	{1.4 }
	25	0.6	11.1	8.75	17.2	{1.75}
	30	0.65	16.3	10.5	20.6	{2.1 }
	5-5*	0.45	2.25	1.75	3.4	{0.35}	35
	10*	0.5	3.13	3.5	6.8	{0.7 }
	15	0.65	8.45	5.25	10.3	{1.05}
	20	0.65	8.45	7	13.7	{1.4 }
	25	0.7	11.9	8.75	17.2	{1.75}
	30	0.7	11.9	10.5	20.6	{2.1 }
	35	0.75	16.5	12.25	24	{2.45}
	40	0.8	23.2	14	27.5	{2.8 }
	45	0.8	23.2	15.75	30.9	{3.15}
	50	0.85	31.45	17.5	34.3	{3.5 }
	6-5*	0.55	2.7	1.7	4.9	{0.5 }	35
	10	0.7	5.6	3.5	10.8	{1.1 }
	15	0.75	7.4	5.2	15.7	{1.6 }
	20	0.75	7.4	7	20.6	{2.1 }
	25	0.85	12.8	8.7	25.5	{2.6 }
	30	0.85	12.8	10.5	31.4	{3.2 }
	35	0.9	16.7	12.2	36.3	{3.7 }
	40	0.9	16.8	14	41.2	{4.2 }
	45	1	27.8	15.8	46.1	{4.7 }
	50	1	28	17.5	52	{5.3 }
	60	1	28	18	53	{5.4 }	30
	70	1.1	46.2	20	58.8	{6 }	28
	8-10	0.85	6.4	3.5	10.8	{1.1 }	35
	15	0.9	7.9	5.2	15.7	{1.6 }
	20	0.9	7.9	7	20.6	{2.1 }
	25	0.9	7.9	8.7	25.5	{2.6 }
	30	1	12	10.5	31.4	{3.2 }
	35	1	12	12.2	36.3	{3.7 }
	40	1.1	18.7	14	41.2	{4.2 }
	45	1.1	18.7	15.8	46.1	{4.7 }
	50	1.1	18.7	17.5	52	{5.3 }
	60	1.2	28.2	21	61.8	{6.3 }
	70	1.3	42	24.5	72.6	{7.4 }
	10-10	0.9	5.2	3.5	10.8	{1.1}	35
	15	1	7.3	5.2	15.7	{1.6}
	20	1	7.3	7	20.6	{2.1}
	25	1.1	10.5	8.7	25.5	{2.6}
	30	1.1	10.5	10.5	31.4	{3.2}
	35	1.2	15	12.2	36.3	{3.7}
	40	1.2	15	14	41.2	{4.2}
	45	1.3	21.8	15.8	46.1	{4.7}
	50	1.3	21.8	17.5	52	{5.3}
	60	1.4	30.8	21	61.8	{6.3}
	70	1.4	30.8	24.5	72.6	{7.4}
	12-15	1.1	7.2	5.25	15.7	{1.6}	35
	20	1.1	7.2	7	20.6	{2.1}
	25	1.3	13.7	8.75	25.5	{2.6}
	30	1.3	13.7	10.5	31.4	{3.2}
	40	1.3	13.7	14	41.2	{4.2}
	50	1.5	25.5	17.5	52	{5.3}
	60	1.5	25.5	21	61.8	{6.3}
	70	1.6	34.4	24.5	72.6	{7.4}
	80	1.6	34.4	28	82.4	{8.4}
	13-15	1.2	8.4	5.2	15.7	{1.6}	35
	20	1.3	11.1	7	20.6	{2.1}
	25	1.3	11.1	8.7	25.5	{2.6}
	30	1.4	15.1	10.5	31.4	{3.2}
	35	1.4	15.1	12.2	36.3	{3.7}
40	1.4	15.1	14	41.2	{4.2}
45	1.4	15.1	15.8	46.1	{4.7}
50	1.4	15.1	17.5	52	{5.3}
60	1.6	27.2	21	61.8	{6.3}
70	1.6	27.2	24.5	72.6	{7.4}
80	1.7	36.2	28	82.4	{8.4}
16-15	1.4	9.6	5.2	15.7	{ 1.6}	35
20	1.5	12.4	7	20.6	{ 2.1}
25	1.5	12.4	8.7	25.5	{ 2.6}
30	1.5	12.4	10.5	31.4	{ 3.2}
35	1.6	15.6	12.2	36.3	{ 3.7}
40	1.6	15.6	14	41.2	{ 4.2}
45	1.7	20.4	15.8	46.1	{ 4.7}
50	1.7	20.4	17.5	52	{ 5.3}
60	1.8	26.1	21	61.8	{ 6.3}
70	1.8	26.1	24.5	72.6	{ 7.4}
80	1.8	26.1	28	82.4	{ 8.4}
20-20	1.8	11.3	7	34.3	{ 3.5}	35
25	1.9	13.3	8.8	43.1	{ 4.4}
30	1.9	13.3	10.5	52	{ 5.3}
35	2	16	12.3	59.8	{ 6.1}
40	2	16	14	68.6	{ 7 }
45	2.2	23.7	15.8	77.5	{ 7.9}
50	2.2	23.7	17.5	86.3	{ 8.8}
60	2.2	23.7	21	103	{10.5}
70	2.4	34.8	24.5	120.6	{12.3}
80	2.4	34.8	28	137.3	{14 }

[ ! ] Both ends of * marked springs are not ground.
[!] Usage Count: 1 million times

■UH: Fmax. (allowable deflection) = L × Fa%

Part Number		d	Solid Length (Reference Value)	F max.	N{kgf} max.		Fa%
Type	D−L
SL-UH SH-UH SHD-UH	4-5*	0.45	2.7	1.5	4.4	{ 0.45}	30
	10*	0.5	3.8	3	8.8	{ 0.9 }
	15	0.6	8.1	4.5	13.2	{ 1.35}
	20	0.65	11.7	6	17.6	{ 1.8 }
	25	0.7	16.8	7.5	22.1	{ 2.25}
	30	0.7	16.8	9	26.5	{ 2.7 }
	5-5*	0.55	3.3	1.5	4.4	{ 0.45}	30
	10	0.6	4.65	3	8.8	{ 0.9 }
	15	0.6	4.65	4.5	13.2	{ 1.35}
	20	0.75	11.81	6	17.6	{ 1.8 }
	25	0.75	11.81	7.5	22.1	{ 2.25}
	30	0.8	16	9	26.5	{ 2.7 }
	35	0.85	21.68	10.5	30.9	{ 3.15}
	40	0.85	21.68	12	35.3	{ 3.6 }
	45	0.9	28.8	13.5	39.7	{ 4.05}
	6-5*	0.65	3.2	1.5	8.8	{ 0.9 }	30
	10	0.7	3.9	3	17.7	{ 1.8 }
	15	0.85	7.7	4.5	26.5	{ 2.7 }
	20	0.9	9.7	6	35.3	{ 3.6 }
	25	1	15.5	7.5	44.1	{ 4.5 }
	30	1	15.5	9	53	{ 5.4 }
	35	1.1	24.8	9.8	57.9	{ 5.9 }	28
	40	1.1	24.8	10	58.8	{ 6 }	25
	45	1.1	24.8	11.3	66.7	{ 6.8 }
	50	1.2	39	10	58.8	{ 6 }	20
	60	1.2	39	14	82.4	{ 8.4 }	23
	70	1.2	39	15	88.3	{ 9 }	21
	8-10	0.9	5.3	3	17.7	{ 1.8 }	30
	15	0.9	5.3	4.5	26.5	{ 2.7 }
	20	1.1	11	6	35.3	{ 3.6 }
	25	1.1	11	7.5	44.1	{ 4.5 }
	30	1.2	15.9	9	53	{ 5.4 }
	35	1.2	15.9	10.5	61.8	{ 6.3 }
	40	1.3	23.1	12	70.6	{ 7.2 }
	45	1.3	23.1	13.5	79.4	{ 8.1 }
	50	1.4	33.3	15	88.3	{ 9 }
	60	1.4	33.3	18	105.9	{10.8 }
	70	1.5	48	19	111.8	{11.4 }	27
	10-10	1.1	6.9	3	17.7	{ 1.8}	30
	15	1.1	6.9	4.5	26.5	{ 2.7}
	20	1.2	9.3	6	35.3	{ 3.6}
	25	1.2	9.3	7.5	44.1	{ 4.5}
	30	1.3	12.7	9	53	{ 5.4}
	35	1.4	17.5	10.5	61.8	{ 6.3}
	40	1.4	17.5	12	70.6	{ 7.2}
	45	1.5	23.8	13.5	79.4	{ 8.1}
	50	1.5	23.8	15	88.3	{ 9 }
	60	1.6	32.4	18	105.9	{10.8}
	70	1.7	44.2	21	123.6	{12.6}
	12-15	1.3	8.5	4.5	26.5	{ 2.7}	30
	20	1.3	8.5	6	35.3	{ 3.6}
	25	1.5	14.7	7.5	44.1	{ 4.5}
	30	1.5	14.7	9	53	{ 5.4}
	40	1.7	25.5	12	70.6	{ 7.2}
	50	1.7	25.5	15	88.3	{ 9 }
	60	1.8	33.3	18	105.9	{10.8}
	70	1.9	43.3	21	123.6	{12.6}
	80	2	54	24	141.2	{14.4}
	13-15	1.5	9.2	4.5	44.1	{ 4.5}	30
	20	1.5	9.2	6	58.8	{ 6 }
	25	1.5	9.2	7.5	73.5	{ 7.5}
	30	1.8	18	9	88.3	{ 9 }
	35	1.8	18	10.5	103	{10.5}
	40	1.8	18	12	117.7	{12 }
45	1.8	18	13.5	132.4	{13.5}
50	2	28.5	15	147	{15 }
60	2.1	36	18	176.5	{18 }
70	2.2	45.1	21	205.9	{21 }
80	2.2	45.1	20	196.1	{20 }	25
16-15	1.7	9.6	4.6	44.1	{ 4.5}	30
20	1.9	14	6	58.8	{ 6 }
25	1.9	14	7.5	73.5	{ 7.5}
30	1.9	14	9	88.3	{ 9 }
35	1.9	14	10.5	103	{10.5}
40	2.2	25.1	12	117.7	{12 }
45	2.2	25.1	13.5	132.4	{13.5}
50	2.2	25.1	15	147.1	{15 }
60	2.3	30.5	18	176.5	{18 }
70	2.5	44.7	21	205.9	{21 }
80	2.5	44.7	24	235.4	{24 }
20-25	2.3	13.8	7.5	110.8	{11.3}	30
30	2.3	13.8	9	132.4	{13.5}
35	2.5	18.8	10.5	154.9	{15.8}
40	2.5	18.8	12	176.5	{18 }
45	2.8	29.4	13.5	199.1	{20.3}
50	2.8	29.4	15	220.6	{22.5}
60	3	40.5	18	264.8	{27 }
70	3	40.5	21	308.9	{31.5}
80	3.2	54.4	24	353	{ 36 }

[ ! ] Both ends of * marked springs are not ground.
[!] Usage Count: 1 million times
 
kgf (load) = N⋅mm (spring constant) × 0.101972 × F (Deflection)
[kgf]=N × 0.101972
 
● How to calculate the number of coils (reference value):
Total coils = solid length / wire diameter (d) - 1
Number of active coils = total coils - 2
* The values of the number of coils are for reference only. There may be some variations depending on the lot.
 
[!] The values of solid length are for reference only. There may be some variations depending on the lot.
Using it compressed to the solid length may cause deformation or break after a few uses.
Be sure to use the springs within the range of the allowable deflection F max.(mm).

■Spring Constant (N/mm) [kgf/mm]
[ ! ] D12 is applicable to UY, UR, and UF Types only.

Type

SL-UY SH-UY SHD-UY

SL-UR SH-UR SHD-UR

SL-UF SH-UF SHD-UF

SL-UM SH-UM SHD-UM

SL-UH SH-UH SHD-UH

D

2

0.05 {0.005}

0.2 {0.02}

0.3 {0.03}

3

0.098 {0.01}

0.29 {0.03}

0.49 {0.05}

4

2.0 {0.2}

2.9 {0.3}

5

6

2.9 {0.3}

5.9 {0.6}

8

10

0.2 {0.02}

12

13

9.8 {1.0}

16

20

0.3 {0.03}

0.5 {0.05}

0.98 {0.1}

4.9 {0.5}

14.7 {1.5}

Fmax.

F = L × Fa%

F = L × Fa%

F = L × 45%

F = L × Fa%

F = L × Fa%

				Working Environment: Class 1,000*				Working Environment: Class 10**
Hydrocarbon cleaning Ro water cleaning		Wash with pure water (10 MΩ·cm) after high-pressure water jet cleaning (Ro water)		Use pure water (13 MΩ·cm)		Use nitrogen blow		Conducted on a clean bench in a Class 10** clean environment

*US FED STD 209E, ISO 14644-1 ISO 6 Equiv.
**US FED STD 209E, ISO 14644-1 ISO 4 Equiv.

						Working Environment: Class 1,000*				Working Environment: Class 10**
Hydrocarbon cleaning Ro water cleaning		Electrolytic polishing with an electrolytic polishing layer according to the material		Wash with pure water (10 MΩ·cm) after high-pressure water jet cleaning (Ro water)		Use warm pure water (13 MΩ·cm)		Use nitrogen blow		Conducted on a clean bench in a Class 10** clean environment

*US FED STD 209E, ISO 14644-1 ISO 6 Equiv.
**US FED STD 209E, ISO 14644-1 ISO 4 Equiv.

Cleaning Effectiveness / Recommended Environment for Use

Cleaning Method	Product Part Number	Packaging Type	Effects Compared to Uncleaned Product	Environment (Standard)	Possible applications
Degreasing	SL-□□	Anti-rust packing	Oil removal	General environment	Regular assembly process
					Post battery assembly process
Precision cleaning	SH-□□	Degassing double packing	Oil removal Dust removal	Clean environment (Class 10 to 1,000*)	Battery assembly process
					LCD-related post assembly process
					In-vehicle camera assembly process
Electrolytic polishing + precision cleaning	SHD-□□	Degassing double packing	Oil removal Dust removal Outgas reduction	Vacuum environment Clean environment (Class 10 to 1,000*)	Pre-semiconductor process
					Liquid crystal deposition process
					Pre-OLED process

*US FED STD 209E, ISO 14644-1 ISO 4 to ISO 6 Equiv.