MISUMI WT18-20

Material JIS-SWP-A Specifications

Part Number

WT13-60

�Spring Constant D12 and 14 for WY Type and D12,14 and 20 for WT Type are not available.

Type

WY

WR

WF

WL

WT

WM

WH

WB

D

2

0.5{0.05}

3

N/mm 0.1 {kgf/mm}{0.01}

N/mm 0.3 {kgf/mm}{0.03}

N/mm 0.5 {kgf/mm}{0.05}

N/mm 1.0 {kgf/mm}{0.1}

1.5 {0.15}

2.0 {0.2}

3.9{0.4}

4

2.9{0.3}

4.9{0.5}

5

N/mm 2.0 {kgf/mm}{0.2}

N/mm 2.9 {kgf/mm}{0.3}

N/mm 5.9 {kgf/mm}{0.6}

N/mm 9.8 {kgf/mm}{1.0}

6

8

10

N/mm 0.2 {kgf/mm}{0.02}

12

13

N/mm 9.8 {kgf/mm}{1.0}

N/mm 19.6 {kgf/mm}{2.0}

14

16

18

N/mm 0.5 {kgf/mm}{0.05}

N/mm 1.0 {kgf/mm}{0.1}

N/mm 2.9 {kgf/mm}{0.3}

N/mm 3.9 {kgf/mm}{0.4}

N/mm 4.9 {kgf/mm}{0.5}

N/mm 14.7 {kgf/mm} {1.5}

29.4{3.0}

20

22

N/mm 29.4{kgf/mm}{3.0}

27

Fmax.

F=Lx75%

F=Lx60%

F=Lx45%

F=Lx40%

F=Lx40%

F=Lx35%

F=Lx30%

F=Lx25%

�WT: Fmax. (Allowable Deflection) =Lx40% (Lx35%)

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
0.3	1.73	2	2.9{0.3}	WT3-	5*
0.4	5	4	5.9{0.6}	10*
0.45	8.78	6	8.8{0.9}	15*
0.45	8.78	8	11.8{1.2}	20*
0.5	14.5	10	14.7{1.5}	25*
0.4	2.7	2	2.9{0.3}	WT4-	5*
0.4	2.7	4	5.9{0.6}	10*
0.5	6.5	6	8.8{0.9}	15*
0.55	9.63	8	11.8{1.2}	20
0.55	9.63	10	14.7{1.5}	25
0.6	15	12	17.7{1.8}	30
0.6	15	14	20.6{2.1}	35
0.65	22.1	16	23.5{2.4}	40
0.45	2.36	2	3.9{0.4}	WT5-	5*
0.5	3.25	4	7.8{0.8}	10*
0.6	6.3	6	11.8{1.2}	15
0.6	6.3	8	15.7{1.6}	20
0.7	12.6	10	19.6{2.0}	25
0.7	12.6	12	23.5{2.4}	30
0.75	17.3	14	27.5{2.8}	35
0.75	17.3	14	27.5{2.8}	(40)
0.8	24	15.8	30.9{3.2}	(45)
0.8	24	17.5	34.3{3.5}	(50)
0.85	32.3	19.3	37.8{3.9}	(55)
0.85	32.3	21	41.2{4.2}	(60)
0.85	34	22.7	44.5{4.5}	(65)
0.9	44.6	24.5	48.1{4.9}	(70)
0.5	2.38	2	3.9{0.4}	WT6-	5*
0.6	4.35	4	7.8{0.8}	10
0.6	4.35	6	11.8{1.2}	15
0.7	7.7	8	15.7{1.6}	20
0.7	7.7	10	19.6{2.0}	25
0.8	14	12	23.5{2.4}	30
0.8	14	14	27.5{2.8}	35
0.85	18.7	16	31.4{3.2}	40
0.85	18.7	18	35.3{3.6}	45
0.9	24.8	20	39.2{4.0}	50
0.9	24.8	19	37.8{3.9}	(55)
0.9	24.8	21	41.2{4.2}	(60)
0.9	26.1	22.7	44.5{4.5}	(65)
1	43	24.5	48.1{4.9}	(70)
1	43	28	54.9{5.6}	(80)

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
0.7	4.38	4	7.8{0.8}	WT8-	10
0.8	6.8	6	11.8{1.2}	15
0.8	6.8	8	15.7{1.6}	20
0.8	6.8	10	19.6{2.0}	25
0.9	10.8	12	23.5{2.4}	30
0.9	10.8	14	27.5{2.8}	35
1	17.5	16	31.4{3.2}	40
1	17.5	18	35.3{3.6}	45
1	17.5	20	39.2{4.0}	50
1.1	27.5	22	43.1{4.4}	55
1.1	27.5	24	47.1{4.8}	60
1.1	27.5	26	51.0{5.2}	65
1.1	27.5	28	54.9{5.6}	70
1.2	42	32	62.8{6.4}	80
0.85	5.53	4	7.8{0.8}	WT10-	10
0.9	6.75	6	11.8{1.2}	15
0.9	6.75	8	15.7{1.6}	20
1	10	10	19.6{2.0}	25
1	10	12	23.5{2.4}	30
1	10	14	27.5{2.8}	35
1	10	16	31.4{3.2}	40
1.1	14.3	18	35.3{3.6}	45
1.1	14.3	20	39.2{4.0}	50
1.2	21.6	22	43.1{4.4}	55
1.2	21.6	24	47.1{4.8}	60
1.2	21.6	26	51.0{5.2}	65
1.3	32.5	28	54.9{5.6}	70
1.3	32.5	32	62.8{6.4}	80
1	6	6	11.8{1.2}	WT13-	15
1.1	8.25	8	15.7{1.6}	20
1.1	8.25	10	19.6{2.0}	25
1.2	11.1	12	23.5{2.4}	30
1.2	11.1	14	27.5{2.8}	35
1.2	11.1	16	31.4{3.2}	40
1.2	11.1	18	35.3{3.6}	45
1.3	15.6	20	39.2{4.0}	50
1.3	15.6	22	43.1{4.4}	55
1.3	15.6	24	47.1{4.8}	60
1.4	21	26	51.0{5.2}	65
1.4	21	28	54.9{5.6}	70
1.4	21	32	62.8{6.4}	80
1.2	7.5	6	11.8{1.2}	WT16-	15
1.3	9.43	8	15.7{1.6}	20
1.4	12.6	10	19.6{2.0}	25
1.4	12.6	12	23.5{2.4}	30
1.4	12.6	14	27.5{2.8}	35
1.4	12.6	16	31.4{3.2}	40
1.6	22.4	18	35.3{3.6}	45
1.6	22.4	20	39.2{4.0}	50
1.6	22.4	22	43.1{4.4}	55
1.7	28.9	24	47.1{4.8}	60
1.7	28.9	26	51.0{5.2}	65
1.7	28.9	28	54.9{5.6}	70
1.7	28.9	32	62.8{6.4}	80

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
1.6	10.8	8	31.4{3.2}	WT18-	20
1.7	13.6	10	39.2{4.0}	25
1.7	13.6	12	47.1{4.8}	30
1.7	13.6	14	54.9{5.6}	35
1.8	16.7	16	62.8{6.4}	40
1.9	20.5	18	70.6{7.2}	45
1.9	20.5	20	78.5{8.0}	50
2	26	22	86.3{8.8}	55
2	26	24	94.1{9.6}	60
2	26	26	102.0{10.4}	65
2	26	28	109.8{11.2}	70
2.1	31.5	32	125.5{12.8}	80
1.8	11.3	8	31.4{3.2}	WT22-	20
1.8	11.3	10	39.2{4.0}	25
1.9	13.3	12	47.1{4.8}	30
1.9	13.3	14	54.9{5.6}	35
2	16	16	62.8{6.4}	40
2.1	19.5	18	70.6{7.2}	45
2.1	19.5	20	78.5{8.0}	50
2.3	28.2	22	86.3{8.8}	55
2.3	28.2	24	94.1{9.6}	60
2.3	28.2	26	102.0{10.4}	65
2.3	28.2	28	109.8{11.2}	70
2.4	33.6	32	125.5{12.8}	80
2.1	13.2	12	47.1{4.8}	WT27-	30
2.3	17.9	14	54.9{5.6}	35
2.3	17.9	16	62.8{6.4}	40
2.4	20.4	18	70.6{7.2}	45
2.6	28.6	20	78.5{8.0}	50
2.6	28.6	22	86.3{8.8}	55
2.6	28.6	24	94.1{9.6}	60
2.6	28.6	26	102.0{10.4}	65
2.8	39.2	28	109.8{11.2}	70
2.8	39.2	32	125.5{12.8}	80

• Load calculation method = Spring constant x Deflection (Int'l Unit) N=N/mmxFmm kgf=kgf/mmxFmm (kgf=Nx0.101972) The values of solid length are for reference only. There may be some variations depending on the lot. Usage Count: 1 Million Times Product Outline >>P.327 How to use coil springs, and precautions >>P.328 Allowable Deflection of (L) Size WT5-40Fmax.=Lx35% WT5-45Fmax.=Lx35% WT5-50Fmax.=Lx35% WT5-55Fmax.=Lx35% WT5-60Fmax.=Lx35% WT5-65Fmax.=Lx35% WT5-70Fmax.=Lx35% WT6-55Fmax.=Lx35% WT6-60Fmax.=Lx35% WT6-65Fmax.=Lx35% WT6-70Fmax.=Lx35% WT6-80Fmax.=Lx35% Both ends of * marked WT Type springs are not ground. �WM: Fmax. (Allowable Deflection) =Lx35%

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
0.35	2.5	1.8	3.4{0.4}	WM	3-	5*
0.38	3.3	3.5	6.9{0.7}			10*
0.45	7	5.3	10.3{1.1}			15*
0.5	11.5	7	13.7{1.4}			20*
0.5	11.5	7.5	14.7{1.5}			(25)
0.55	20.4	9	17.7{1.8}			(30)
0.4	2.3	1.7	3.9{0.4}	WM	4-	5*
0.45	3.4	3.5	6.9{0.7}			10*
0.5	5.1	5.2	10.8{1.1}			15*
0.55	7.7	7	13.7{1.4}			20
0.6	11.7	8.7	17.7{1.8}			25
0.6	11.7	10.5	20.6{2.1}			30
0.65	17.6	12.2	24.0{2.5}			35
0.65	17.6	12	23.5{2.4}			(40)
0.5	2.8	1.7	4.9{0.5}	WM	5-	5*
0.6	4.2	3.5	9.8{1.0}			10
0.65	6.5	5.2	14.7{1.5}			15
0.65	6.5	7	20.6{2.1}			20
0.7	9.1	8.7	25.5{2.6}			25
0.75	12.7	10.5	30.4{3.1}			30
0.8	17.4	12.2	35.3{3.6}			35
0.85	23.8	14	41.2{4.2}			40
0.85	23.8	15.8	46.1{4.7}			45
0.9	23.8	15	43.5{4.5}			(50)
0.9	30	16.5	49.0{5.0}			(55)
0.9	30	18	53.0{5.4}			(60)
0.9	30	17.6	52.0{5.3}			(65)
0.9	30	19.6	58.8{6.0}			(70)
0.55	2.8	1.7	4.9{0.5}	WM	6-	5*
0.65	4.7	3.5	9.8{1.0}			10
0.75	8	5.2	14.7{1.5}			15
0.75	8	7	20.6{2.1}			20
0.85	13.6	8.7	25.5{2.6}			25
0.85	13.6	10.5	30.4{3.1}			30
0.9	18	12.2	35.3{3.6}			35
0.9	18	14	41.2{4.2}			40
0.9	18	15.8	46.1{4.7}			45
0.85	18	17.5	51.0{5.2}			50
1.0	31	19.2	55.9{5.7}			55
1.0	31	18	53.0{5.4}			(60)
1.0	31	18.8	54.9{5.6}			(65)
1.1	47.3	20	58.8{6.0}			(70)
1.1	48.4	22.4	65.9{6.7}			(80)
0.75	4.2	3.5	9.8{1.0}	WM	8-	10
0.9	8.5	5.2	14.7{1.5}			15
0.9	8.5	7	20.6{2.1}			20
0.9	8.5	8.7	25.5{2.6}			25
0.9	8.5	10.5	30.4{3.1}			30
1.0	13	12.2	35.3{3.6}			35
1.0	13	14	41.2{4.2}			40
1.1	19.8	15.8	46.1{4.7}			45
1.1	19.8	17.5	51.0{5.2}			50
1.2	31.2	19.2	55.9{5.7}			55
1.2	31.2	21	61.8{6.3}			60
1.2	31.2	22.7	64.7{6.6}			65
1.2	31.2	24.5	71.6{7.3}			70
1.3	44.2	28	82.4{8.4}			80

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
0.9	5.2	3.5	9.8{1.0}	WM	10-	10
1.0	7.7	5.2	14.7{1.5}			15
1.0	7.7	7	20.6{2.1}			20
1.1	11	8.7	25.5{2.6}			25
1.1	11	10.5	30.4{3.1}			30
1.2	16.2	12.2	35.3{3.6}			35
1.2	16.2	14	41.2{4.2}			40
1.3	22.1	15.8	46.1{4.7}			45
1.3	22.1	17.5	51.0{5.2}			50
1.3	22.1	19.2	55.9{5.7}			55
1.4	32.1	21	61.8{6.3}			60
1.4	32.1	22.7	64.7{6.6}			65
1.4	32.1	24.5	71.6{7.3}			70
1.4	32.2	28	82.4{8.4}			80
1.0	5.5	3.5	10.3{1.1}	WM	12-	10
1.1	7.4	5.2	14.7{1.5}			15
1.1	7.4	7	20.6{2.1}			20
1.1	7.4	8.7	25.5{2.6}			25
1.2	10.2	10.5	30.4{3.1}			30
1.2	10.2	12.2	35.3{3.6}			35
1.3	14.3	14	41.2{4.2}			40
1.3	14.3	15.8	46.1{4.7}			45
1.3	14.3	17.5	51.0{5.2}			50
1.4	19.6	19.2	55.9{5.7}			55
1.4	19.6	21	61.8{6.3}			60
1.5	26.3	22.7	64.7{6.6}			65
1.5	26.3	24.5	71.6{7.3}			70
1.6	36.8	28	82.4{8.4}			80
1.0	5	3.5	10.3{1.1}	WM	13-	10
1.2	8.4	5.2	14.7{1.5}			15
1.3	11.7	7	20.6{2.1}			20
1.3	11.7	8.7	25.5{2.6}			25
1.4	14.5	10.5	30.4{3.1}			30
1.4	14.5	12.2	35.3{3.6}			35
1.4	14.5	14	41.2{4.2}			40
1.4	14.5	15.8	46.1{4.7}			45
1.4	14.5	17.5	51.0{5.2}			50
1.5	22.5	19.2	55.9{5.7}			55
1.5	22.5	21	61.8{6.3}			60
1.6	28.8	22.7	64.7{6.6}			65
1.6	28.8	24.5	71.6{7.3}			70
1.7	37.4	28	82.4{8.4}			80
1.7	37.4	31.5	92.9{9.5}			90
1.2	7.5	5.2	14.7{1.5}	WM	14-	15
1.3	9.8	7	20.6{2.1}			20
1.4	13.3	8.7	25.5{2.6}			25
1.4	13.3	10.5	30.4{3.1}			30
1.4	13.3	12.2	35.3{3.6}			35
1.4	13.3	14	41.2{4.2}			40
1.5	17.3	15.8	46.1{4.7}			45
1.5	17.3	17.5	51.0{5.2}			50
1.5	17.3	19.2	55.9{5.7}			55
1.6	23.2	21	61.8{6.3}			60
1.6	23.2	22.7	64.7{6.6}			65
1.7	30.6	24.5	71.6{7.3}			70
1.7	30.6	28	82.4{8.4}			80
1.8	39.6	31.5	92.7{9.5}			90

d	Solid Length	F max.	Load N{kgf}max.	Part Number	Unit Price
Type D-L	10 ~ 19 pcs.
1.3	7.8	5.2	14.7{1.5}	WM	16-	15
1.4	9.8	7	20.6{2.1}			20
1.5	12.5	8.7	25.5{2.6}			25
1.5	12.5	10.5	30.4{3.1}			30
1.6	15	12.2	35.3{3.6}			35
1.6	15	14	41.2{4.2}			40
1.7	20.4	15.8	46.1{4.7}			45
1.7	20.4	17.5	51.0{5.2}			50
1.8	27	19.2	55.9{5.7}			55
1.8	27	21	61.8{6.3}			60
1.8	27	22.7	64.7{6.6}			65
1.8	27	24.5	71.6{7.3}			70
1.8	27	28	82.4{8.4}			80
1.9	34.2	31.5	92.7{9.5}			90
1.7	11.9	7	34.3{3.5}	WM	18-	20
1.8	14.4	8.7	42.2{4.3}			25
1.8	14.4	10.5	51.0{5.2}			30
1.8	14.4	12.2	59.8{6.1}			35
1.8	14.4	14	68.6{7.0}			40
2.0	22	15.8	77.5{7.9}			45
2.0	22	17.5	85.3{8.7}			50
2.0	22	19.2	94.1{9.6}			55
2.0	22	21	103.0{10.5}			60
2.2	34.1	22.7	110.8{11.3}			65
2.2	34.1	24.5	119.6{12.2}			70
2.2	34.1	28	137.3{14.0}			80
2.3	41.4	31.5	154.0{15.7}			90
2.3	41.4	35	171.6{17.5}			100
1.8	11.7	7	34.3{3.5}	WM	20-	20
1.8	11.7	8.7	42.2{4.3}			25
1.9	14.3	10.5	51.0{5.2}			30
1.9	14.3	12.2	59.8{6.1}			35
1.9	14.3	14	68.6{7.0}			40
2.0	17	15.8	77.5{7.9}			45
2.0	17	17.5	85.3{8.7}			50
2.2	24.8	19.2	94.1{9.6}			55
2.2	24.8	21	103.0{10.5}			60
2.2	24.8	22.7	110.8{11.3}			65
2.2	24.8	24.5	119.6{12.2}			70
2.4	36	28	137.3{14.0}			80
2.4	36	31.5	154.0{15.7}			90
2.4	36	35	171.6{17.5}			100
1.9	12	7	34.3{3.5}	WM	22-	20
2.0	14	8.7	42.2{4.3}			25
2.0	14	10.5	51.0{5.2}			30
2.0	14	12.2	59.8{6.1}			35
2.0	14	14	68.6{7.0}			40
2.3	23	15.8	77.5{7.9}			45
2.3	23	17.5	85.3{8.7}			50
2.3	23	19.2	94.1{9.6}			55
2.3	23	21	103.0{10.5}			60
2.4	30	22.7	110.8{11.3}			65
2.4	30	24.5	119.6{12.2}			70
2.4	30	28	137.3{14.0}			80
2.6	40	31.5	154.0{15.7}			90
2.6	40	35	171.6{17.5}			100
2.3	14	10.5	51.0{5.2}	WM	27-	30
2.4	17	12.2	59.8{6.1}			35
2.4	17	14	68.6{7.0}			40
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