Round Wire Coil Springs, Defection O.D. Referenced, Stainless Steel, Light Load

Brand :

MISUMI

Caution

Product Description

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This round wire coil spring is a light-load stainless steel spring manufactured with a focus on outer diameter (O.D.) precision. Used in precision instruments, light-duty return mechanisms, and low-force actuation systems where accurate outer diameter control is required for fitting within narrow bores or guide tubes.
•Type: Coil Spring
•Material: Stainless Steel/SUS304-WPB
•Load Type: Light Load
•Manufacturing Priority: Outer Diameter Tolerance Controlled
•End Face: you can choose from With Grinding type and Without Grinding type.

Economy Round Wire Coil Springs

Stainless Steel Light Load Precision

- Achieve exacting specifications with our outer diameter prioritized Round Wire Coil Springs.

- Enjoy high-quality stainless steel springs at a fraction of the cost with our Economy Series.

- Ideal for applications requiring less stress with durability.

- Choose from a wide range of diameters and lengths to match your needs.

- Designed to operate efficiently up to a percentage of maximum displacement.

MISUMI Standard

Cheaper Price

Product Variety

3D CAD
3D CAD Support

Product Overview

♢When purchasing of Round Wire Springs, please note that this spring is the outer diameter standard type, manufactured with priority to the outer diameter tolerance, and suitable for hole installation occasions.
♢Stainless Round Wire Springs are also magnetic. Please be careful.

Dimensional Drawing

Outer Diameter D	φ10 or Less	Free Length L	50 or Less	±1mm
	φAbove 12		Above 60	±2mm

Material of Round Wire Springs
Material SUS304-WPB Spring Constant ±10%

Specification Table

■C-UL: Fmax. (allowable displacement) = L×40%

The outer diameter standard type gives priority to guaranteeing the outer diameter, while the inner diameter is for reference only.

Type	Coil O.D. D - Free Length L		Wire Dia. d	Reference Length	F max.	N {kgf} max.		Fa％
C－UL	2－	5^＊	0.2	1.65	2	0.98	{0.1}	40
		10^＊	0.26	5.07	4	1.96	{0.2}
		15^＊	0.26	5.07	6	2.94	{0.3}
	3－	5^＊	0.3	2	2	2.0	{0.2}
		10^＊	0.35	3.7	4	3.9	{0.4}
		15^＊	0.4	6.6	6	5.9	{0.6}
		20^＊	0.4	6.6	8	7.8	{0.8}
		25^＊	0.45	11.7	10	9.8	{1}
		30^＊	0.45	11.7	12	11.8	{1.2}
	4－	5^＊	0.35	2.1	2	2.0	{0.2}
		10^＊	0.45	5.3	4	3.9	{0.4}
		15^＊	0.45	5.3	6	5.9	{0.6}
		20^＊	0.5	8	8	7.8	{0.8}
		25^＊	0.5	8	10	9.8	{1 }
		30^＊	0.55	12.7	12	11.8	{1.2}
		40	0.6	19.8	16	15.7	{1.6}
	5－	5^＊	0.4	2.2	2	2.0	{0.2}
		10^＊	0.5	4.75	4	3.9	{0.4}
		15^＊	0.5	4.75	6	5.9	{0.6}
		20^＊	0.55	6.88	8	7.8	{0.8}
		25^＊	0.55	6.88	10	9.8	{1}
		30	0.65	14.95	12	11.8	{1.2}
		40	0.65	14.95	16	15.7	{1.6}
	6－	5^＊	0.45	2.3	2	2.0	{0.2}
		10^＊	0.55	4.4	4	3.9	{0.4}
		15^＊	0.55	4.4	6	5.9	{0.6}
		20	0.65	8.5	8	7.8	{0.8}
		25	0.65	8.5	10	9.8	{1 }
		30	0.7	12.6	12	11.8	{1.2}
		35	0.7	12.6	14	13.7	{1.4}
	8－	10	0.65	4.6	4	3.9	{0.4}
		15	0.75	8.3	6	5.9	{0.6}
		20			8	7.8	{0.8}
		25			10	9.8	{1 }
		30	0.8	10.4	12	11.8	{1.2}
		35			14	13.7	{1.4}
		40			16	15.7	{1.6}
		45	0.85	14.5	18	17.7	{1.8}
	10－	10	0.75	4.7	4	3.9	{0.4}
		15	0.8	6.2	6	5.9	{0.6}
		20	0.8	6.2	8	7.8	{0.8}
		25	0.9	9.5	10	9.8	{1 }
		30			12	11.8	{1.2}
		35			14	13.7	{1.4}
		50	1.0	15.5	20	19.6	{2.0}
		60	1.1	23.7	24	23.5	{2.4}
	12－	15	0.9	6.75	6	5.9	{0.6}
		20	1.0	10	8	7.8	{0..8}
		25	1.0	10	10	9.8	{1.0}
		40	1.2	21.6	16	15.7	{1.6}
	13－	20	1.0	8.25	8	7.8	{0.8}
		30	1.1	12.1	12	11.8	{1.2}
		40	1.1	12.1	16	15.7	{1.6}
	16－	15	1.1	7.7	6	5.9	{0.6}
		25	1.2	10.8	10	9.8	{1.0}
	20－	30	1.7	12.8	12	35.3	{3.6}

■C-UTT: Fmax. (allowable displacement) = L×Fa%

The outer diameter standard type gives priority to guaranteeing the outer diameter, while the inner diameter is for reference only.

Type	D－L		d	Reference Length	F max.	N {kgf} max.		Fa％
C－UTT	3－	5^＊	0.35	2.8	2	2.9	{0.3}	40
		10^＊	0.4	4.8	4	5.9	{0.6}
		15^＊	0.45	8.3	6	8.8	{0.9}
		20^＊	0.45	8.3	6	8.8	{0.9}	30
	4－	5^＊	0.4	2.6	2	2.9	{0.3}	40
		10^＊	0.45	3.9	4	5.9	{0.6}
		15^＊	0.5	6	6	8.8	{0.9}
		20^＊	0.55	9.4	8	11.8	{1.2}
		30	0.6	14.4	10	14.7	{1.5}	33
	5－	5^＊	0.45	2.6	2	2.9	{0.3}	40
		10^＊	0.5	3.6	4	5.9	{0.6}
		15	0.6	7.5	6	8.8	{0.9}
		20	0.6	7.5	8	11.8	{1.2}
		25	0.65	10.7	10	14.7	{1.5}
		30	0.7	15.4	12	17.7	{1.8}
	6－	5^＊	0.5	2.4	2	3.9	{0.4}
		10	0.6	4.2	4	7.8	{0.8}
		15	0.7	7.4	6	11.8	{1.2}
		20	0.7	7.4	8	15.7	{1.6}
		25	0.8	13.6	10	19.6	{2.0}
		30	0.8	13.6	12	23.5	{2.4}
		35	0.85	17.5	14	27.5	{2.8}
		40	0.9	23.4	16	31.4	{3.2}
		45	0.9	23.4	18	35.3	{3.6}
	8－	10	0.75	5.3	4	7.8	{0.8}	40
		15	0.75	5.3	6	11.8	{1.2}
		20	0.9	10.4	8	15.7	{1.6}
		25	0.9	10.4	10	19.6	{2.0}
		30	1.0	17	12	23.5	{2.4}
		35			14	27.5	{2.8}
		40			16	31.4	{3.2}
		45	1.1	25.3	18	35.3	{3.6}
		70	1.2	39.6	28	54.9	{5.6}
	10－	10	0.85	5.1	4	7.8	{0.8}
		15	0.85	5.1	6	11.8	{1.2}
		20	1.0	9.5	8	15.7	{1.6}
		25	1.0	9.5	10	19.6	{2.0}
		30	1.1	14.3	12	23.5	{2.4}
		35	1.1	14.3	14	27.5	{2.8}
		40	1.2	20.4	16	31.4	{3.2}
		45	1.2	20.4	18	35.3	{3.6}
		60	1.3	29.9	24	47.1	{4.8}
	13－	15	1.0	5.75	6	11.8	{1.2}
		20	1.2	10.5	8	15.7	{1.6}
		25	1.2	10.5	10	19.6	{2.0}
		30	1.3	15	12	23.5	{2.4}
		35	1.3	15	14	27.5	{2.8}
		40	1.4	20.3	16	31.4	{3.2}
		45	1.4	20.3	18	35.3	{3.6}
		50	1.5	27.8	20	39.2	{4.0}
	16－	15	1.2	7.2	6	11.8	{1.2}
		20	1.3	9.1	8	15.7	{1.6
		25	1.3	9.1	10	19.6	{2.0}
		30	1.4	12.3	12	23.5	{2.4}
		35	1.5	16.5	14	27.5	{2.8}
		40	1.6	21.6	16	31.4	{3.2}
	20－	30	1.8	12.6	12	47.1	{4.8}
		50	2.2	27.5	20	78.5	{8.0}

kgf(Load)＝N/mm(Spring Constant)×0.101972×F(Allowable Displacement),{kgf}=N×0.101972

The outer diameter standard type gives priority to guaranteeing the outer diameter, while the inner diameter is for reference only.

Both ends of C-UL models with * are not ground.

Be sure to use within the allowable displacement Fmax.(mm)

Calculation method of laps (reference value):
Total number of laps = solid length ÷ wire diameter (d)-1
Effective laps=total number of laps-2

The number of laps is a reference value. There will be some deviations among batches. The solid length is a reference value. There will be slight differences among batches. Moreover, if it is used under the limit condition of the solid length, it may cause the spring to be deformed or be damaged after using only a limited number of times.

The solid length is a reference value. There will be slight differences among batches.

■Spring Constant

D12 is for C-UY・C-UR・C-UF・C-UBB only. D14 is for C-UBB only.

Type

C-UV

C-UY

C-UR

C-UF

C-UL

C-UTT

C-UM

C-UH

C-UBB

0.05{0.005}

0.2{0.02}

0.3{0.03}

0.5{0.05}

N/mm
0.05
{kgf/mm}{0.005}

N/mm
0.098
{kgf/mm}{0.01}

N/mm
0.29
{kgf/mm}
{0.03}

N/mm
0.49
{kgf/mm}
{0.05}

N/mm
0.98
{kgf/mm}
{0.1}

1.5{0.15}

2.0
{0.2}

2.9{0.3}

4.9{0.5}

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}

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

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

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

0.3{0.03}

0.5{0.05}

0.98{0.1}

2.9{0.3}

3.9{0.4}

4.9{0.5}

14.7{1.5}

29.4{3.0}

Fmax.

F＝L×70％

F＝L×75％

F＝L×60％

F＝L×45％

F＝L×40％

F＝L×35％

F＝L×30％

F＝L×25％

Product Features

Different from ordinary springs on the market, MISUMI Round Wire Springs are more precise and refined, divided into the inner diameter standard type and the outer diameter standard type, the former of which is manufactured giving priority to the inner diameter tolerance while the latter is manufactured giving priority to the outer diameter tolerance.

Select an appropriate Round Wire Springs type according to the actual installation situation, and refer to the published content for the specific inner and outer diameter tolerance values.
* The solid length is a reference value. If it is used under the limit condition of the solid length, the spring may be deformed, or damaged after using only a limited number of times. Therefore, use within the allowable displacement Fmax.(mm).
To increase the usage count, it is recommended to use the spring up to 70% of the allowable displacement Fmax..

The test data are obtained through testing by our company, which are for reference only. Generic products on the market are similar products randomly purchased by our company from online or offline markets
	Installation Diagram of Outer Diameter Standard Type Round Wire Coil Spring, Round Wire Springs

Precautions

Precautions
Operating temperature of Round Wire Springs
SWP-A……Normal temperature (0~40℃)
Stainless steel……-10~100℃
Spring oil tempered steel wire……Normal temperature (0~40℃)
* If the spring is used under conditions exceeding the above temperature, the load value may decrease due to usage conditions.
* When used in an environment with high and low temperature differences and humidity such as outdoors, it is recommended to choose stainless steel products.
* Heat-resistant springs can also be used. For details, refer to the Plastic Mold Components Catalog.
Stainless steel springs are also magnetic. Please be careful.

Example of Use

Hole Reference Positioning Mechanism
A Round Wire Springs is mechanism for positioning the workpiece based on the hole reference.
Loosening during positioning can be reduced by using a tapered pin to eliminate the deviation caused by the tolerance of each workpiece hole.
Select the compression spring to move from the beginning of the positioning contact with the workpiece.


(Economy series) Round Wire Springs - Outer Diameter Standard Stainless Steel, Ultra Light Load, Spring Constant 0.05 to 0.98 N/mm	(Economy series) Round Wire Springs - Inner Diameter Standard Stainless Steel, Light Load, Spring Constant 0.29 to 0.49 N/mm	(Economy series) Round Wire Springs - Outer Diameter Standard Stainless Steel, Heavy Load, Spring Constant 2.0 to 14.7 N/mm
Reason for Recommendation: MISUMI Basic Round Wire Springs, Outer Diameter Standard Type, Ultra Light Load Type	Reason for Recommendation: MISUMI Basic Round Wire Springs, Inner Diameter Standard Type, Light Load Type	Reason for Recommendation: MISUMI Basic Round Wire Springs, Outer Diameter Standard Type, Heavy Load Type