How long is the life of a basic round wire coil spring?

Unfortunately, there are no specific test values as reference regarding the life of a round wire coil spring because there is individual difference to a certain extent and the installation conditions are complicated. The usage count varies with the operating temperature, environment, and amount of deformation. To increase the usage count, it is recommended to use the spring up to 70% of the allowable displacement Fmax..

What are the JIS standards for general spring-related materials?

Piano wires: JIS G 3522 Iron wires: JIS G 3532 Hard drawn steel wires: JIS G 3521 Stainless steel wires for springs: JIS G 4313

What influence will the usage without a spring rail have on the spring?

The usage without a spring rail will cause buckling of the spring, bending of its body and other problems, leading to breakage due to high stress locally generated on the inner side of the bending part. To ensure the service life of the spring, install the spring using the shaft, outer diameter guide rail, etc. ※Basically, it is ideal to use the spring on the intermediate shaft of the inner diameter side guide rail, passing it through from the upper surface to the lower surface.

What influence will the usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) have on the spring?

The usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) will cause high stress breakage above the calculated value on the section. In addition, near the solid length, the effective coil part will gradually get close and the spring constant will increase. Therefore, be sure to use within the allowable displacement Fmax.(mm).

What is the difference between a piano steel wire spring and a hard drawn steel wire spring?

There is little difference in appearance between the two materials. In short, the piano wire is an advanced material, and the hard drawn steel wire is a general material. The piano wire is often used as a spring for precision machinery while the hard drawn steel wire is mostly used as a peripheral spring for groceries or blinds. They are both high-carbon steels with almost the same chemical composition. The production of piano wires is time-consuming and they are expensive because there is additional standardized management and inspection of impurities, the depth of surface scars, and the depth of decarburized layer. Although the subtle difference is invisible to the naked eye, it has a great influence on the quality of the spring.

(!) Since support from Microsoft will end on January 14th, 2020, Windows 7 will be excluded from the recommended environment from December 15th, 2019 on this site. Vì lý do Microsoft kết thúc hỗ trợ cho Windows 7 vào ngày 14/01/2020, Windows 7 sẽ là hệ điều hành không được khuyến khích sử dụng với trang web này từ ngày 15/12/2019.

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Configure Remaining SpecificationsĐịnh cấu hình các thông số còn lại

Part Number CompleteĐã hoàn thành

C-UM20-30

type Free Length L Inner Dia. D-2d (or D) Outer Dia. D (or D1) Height with the max. load applied ([Free Length] – [Allowable Deflection]) Spring Constant Allowable Load (Configurable Range) Max. Load Wire Dia. End Surface Status Total Coils Solid Length Allowable Displacement CAD Days to Ship

Specification/DimensionsĐặc điểm kỹ thuật / Kích thướcĐặc điểm kỹ thuật / Kích thước

type
- C-UH
- C-UM
ClearTrống
Free Length L(mm)
5

10

15

20

25

30

35

40

50
ClearTrống
Inner Dia. D-2d (or D)(Ø)
2.8

2.9

3

3.1

3.2

3.5

3.6

3.7

3.8

4

4.2

4.3

4.5

4.6

4.7

4.9

5.6

5.8

6

6.2

6.3

7.2

7.4

7.6

7.8

8

8.2

9.4

10

10.4

10.6

16.2

26
ClearTrống
Outer Dia. D (or D1)(Ø)
4

5

6

8

10

13

20
ClearTrống
Height with the max. load applied ([Free Length] – [Allowable Deflection])(mm)
3.25

3.3

3.5

6.5

7

9.75

9.8

10.5

13

14

16.3

17.5

19.5

21

22.75

22.8

24.5

26

35
ClearTrống
Spring Constant(N/mm)
2

2.9

5.9

9.8
ClearTrống
Allowable Load (Configurable Range)(N)
- 1.51~4.50
- 4.51~8.50
- 8.51~16.00
- 16.01~30.00
- 30.01~50.00
- 50.01~73.00
- 73.01~107.00
- 150.01~230.00
ClearTrống
Max. Load(N)
3.4

4.4

4.9

6.8

8.8

10.3

10.8

13.2

13.7

15.7

17.7

20.6

22.1

24

25.5

26.5

31.4

35.3

36.3

41.2

44.1

52

53

58.8

61.8

73.5

88.3

147
ClearTrống
Wire Dia.(Ø)
0.4

0.45

0.5

0.55

0.6

0.65

0.7

0.75

0.85

0.9

1

1.1

1.2

1.3

1.4

1.5

1.8

1.9

2
ClearTrống
End Surface Status
- With Grinding
- Without Grinding
ClearTrống
Total Coils
3.9

4.5

4.6

4.8

4.9

5

5.1

5.3

6

6.3

6.5

6.6

6.8

7

7.5

7.8

8.1

8.5

8.8

8.9

9

9.8

11

11.5

12

12.3

12.5

12.6

13.2

14.1

14.5

14.7

16

17.5

17.7

21
ClearTrống
Solid Length(mm)
2.2

2.7

3.13

3.2

3.8

3.9

4.65

4.9

5.2

5.3

5.6

6.4

6.9

7.3

7.4

7.5

7.7

7.9

8.1

8.4

8.45

9.2

9.3

9.7

10.5

11

11.1

11.81

11.9

12

12.7

12.8

13.3

15.5

15.9

16.5

16.7

16.8

17.5

18

28.5
ClearTrống
Allowable Displacement(mm)
1.5

1.7

1.75

3

3.5

4.5

5.2

5.25

6

7

7.5

8.7

9

10.5

12.2

12.25

14

15
ClearTrống
CADCAD
- 2D
- 3D
ClearTrống

Days to ShipSố ngày giao hàng

Alltất cả các

Same day

8 Day(s) or Less
ClearTrống

Specify AlterationsChỉ định thay đổi

Round Wire Coil Springs, Defection O.D. Referenced, Stainless Steel, Heavy Load (Part Number)

Name: Round Wire Coil Springs, Defection O.D. Referenced, Stainless Steel, Heavy Load
Brand: MISUMI
Availability: PreOrder

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MISUMI

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MISUMI

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**RoHS Compliant is available for some part numbers.
Please contact with MISUMI for detail effective date.

Product Description

This is an economy item, The price is cheaper than the MISUMI standard product.

Economy Round Wire Coil Springs

Stainless Steel Heavy Load Reliable

- Superior performance with stainless steel durability.

- O.D. Referenced design ensures exact fit and reliable performance.

- Available in a variety of lengths and diameters to meet your needs.

- High quality at a lower cost, perfect for budget-conscious projects.

- Configurable spring constant and load capacity for tailored solutions.

Economy Index Plunger with Knob (M8-M10)

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 steel springs are also magnetic. Please be careful.

Dimensional Drawings

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-UM: 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		Wire Diameter d	Solid Length	F max.	N{kgf} max.		Fa%
C-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	7.0	13.7	｛1.4 ｝
	5－	5＊	0.45	2.25	1.75	3.4	｛0.35 ｝
		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	7.0	13.7	｛1.4 ｝
		30	0.7	11.9	10.5	24.0	｛2.45｝
		35	0.75	16.5	12.25	20.6	｛2.1 ｝
	6－	5＊	0.55	2.7	1.7	4.9	｛0.5 ｝
		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	7.0	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	14.0	41.2	｛4.2 ｝
	8－	10	0.85	6.4	3.5	10.8	｛1.1 ｝
		15	0.9	7.9	5.3	15.7	｛1.6 ｝
		20	0.9	7.9	7.0	20.6	｛2.1 ｝
		25	0.9	7.9	8.8	25.5	｛2.6 ｝
		30	1.0	12.0	10.5	31.4	｛3.2 ｝
		35	1.0	12.0	12.3	36.3	｛3.7 ｝
	10－	10	0.9	5.2	3.5	10.8	｛1.1 ｝
		15	1.0	7.3	5.3	15.7	｛1.6 ｝
		20	1.0	7.3	7.0	20.6	｛2.1 ｝
		25	1.1	10.5	8.8	25.5	｛2.6 ｝
		30	1.1	10.5	10.5	31.4	｛3.2 ｝
	13－	15	1.2	8.4	5.3	15.7	｛1.6 ｝
		20	1.3	11.1	7.0	20.6	｛2.1 ｝
		25	1.3	11.1	8.8	25.5	｛2.6 ｝
		40	1.4	15.1	14.0	41.2	｛4.2｝
	20－	30	1.9	13.3	10.5	52.0	｛5.3 ｝

kgf (load)=N/mm (spring constant)×0.101972×F (displacement)
{kgf}=N×0.101972

■C-UH: 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		Wire Diameter d	Solid Length	F max.	N{kgf} max.		Fa%
C-UH	4－	5＊	0.45	2.7	1.5	4.4	｛ 0.45｝	30
		10＊	0.5	3.8	3.0	8.8	｛ 0.9 ｝
		15	0.6	8.1	4.5	13.2	｛ 1.35｝
	5－	5＊	0.55	3.3	1.5	4.4	｛ 0.45 ｝
		10	0.6	4.65	3.0	8.8	｛ 0.9 ｝
		15	0.6	4.65	4.5	13.2	｛ 1.35｝
		25	0.75	11.81	7.5	22.1	｛ 2.25｝
	6－	5＊	0.65	3.2	1.5	8.8	｛ 0.9 ｝
		10	0.7	3.9	3.0	17.7	｛ 1.8 ｝
		15	0.85	7.7	4.5	26.5	｛ 2.7 ｝
		20	0.9	9.7	6.0	35.3	｛ 3.6 ｝
		25	1.0	15.5	7.5	44.1	｛ 4.5 ｝
		30	1.0	15.5	9.0	53.0	｛ 5.41 ｝
	8－	10	0.9	5.3	3.0	17.7	｛ 1.8 ｝
		15	0.9	5.3	4.5	26.5	｛ 2.7 ｝
		20	1.1	11	6.0	35.3	｛ 3.6 ｝
		25	1.1	11	7.5	44.1	｛ 4.5 ｝
		30	1.2	15.9	9.0	53.0	｛ 5.4 ｝
	10－	15	1.1	6.9	4.5	26.5	｛ 2.7 ｝
		20	1.2	9.3	6.0	35.3	｛ 3.6 ｝
		25	1.2	9.3	7.5	44.1	｛ 4.5 ｝
		30	1.3	12.7	9.0	53.0	｛ 5.4 ｝
		35	1.4	17.5	10.5	61.8	｛ 6.3 ｝
	13－	15	1.5	9.2	4.5	44.1	｛ 4.5 ｝
		20	1.5	9.2	6.0	58.8	｛ 6 ｝
		25	1.5	9.2	7.5	73.5	｛ 7.5 ｝
		30	1.8	18	9.0	88.3	｛ 9 ｝
		50	2.0	28.5	15.0	147.0	｛15.0 ｝
	16－	45	2.2	25.1	13.5	132.4	｛ 13.51 ｝
	20－	30	2.3	13.8	9.0	132.4	｛ 13.51 ｝
		35	2.5	18.8	10.5	154.9	｛ 15.81 ｝
		40	2.5	18.8	12.0	176.5	｛ 18.01 ｝
		45	2.8	29.4	13.5	199.1	｛ 20.32 ｝

Both ends of C-UM/C-UH models with * are not ground.
● 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.

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

■Spring Constant The 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 givingpriority 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 displacementFmax.(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

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.

Precautions

Precautions for use of Round Wire Springs
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.

Related Products


(Economy series) Round Wire Springs - Outer Diameter Standard Stainless Steel, Ultra Heavy Load, Spring Constant 4.9 to 29.4N/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, Light Load, Spring Constant 0.5 to 3.9 N/mm
Reason for Recommendation: MISUMI Basic Round Wire Springs, Outer Diameter Standard Type, Ultra Heavy 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, Light Load Type

Part Number

Incomplete part number.
Please use left hand selections to complete a part number.Incomplete part number.
Please use left hand selections to complete a part number.

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: 30; 60; 90

Part Number
C-UM20-30

Part Number	Price	Minimum Order Qty.	Volume Discount	Days to ShipSố ngày giao hàng	Free Length L (mm)	Inner Dia. D-2d (or D) (Ø)	Outer Dia. D (or D1) (Ø)	Height with the max. load applied ([Free Length] – [Allowable Deflection]) (mm)	Spring Constant (N/mm)	Allowable Load (Configurable Range) (N)	Max. Load (N)	Wire Dia. (Ø)	End Surface Status	Total Coils	Solid Length (mm)	Allowable Displacement (mm)
	15,532 VND	100 Piece(s)	Available	8 Day(s)	30	16.2	20	19.5	5.9	50.01~73.00	52	1.9	With Grinding	6	13.3	10.5

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Basic InformationThông tin cơ bản

Material	SUS304-WPB

Please check the type/dimensions/specifications of the part C-UM20-30 in the Round Wire Coil Springs, Defection O.D. Referenced, Stainless Steel, Heavy Load series.Vui lòng kiểm tra kiểu/kích thước/thông số kỹ thuật của phần C-UM20-30 trong chuỗi Round Wire Coil Springs, Defection O.D. Referenced, Stainless Steel, Heavy Load.

The specifications and dimensions of some parts may not be fully covered. For exact details, refer toCác thông số kỹ thuật và kích thước của mã sản phẩm có thể không được bao phủ đầy đủ. Để biết chi tiết chính xác, hãy tham khảo manufacturer catalogsdanh mục nhà sản xuất ..

Frequently asked question (FAQ)FAQ

Question:Question: How long is the life of a basic round wire coil spring?: Answer:Answer: Unfortunately, there are no specific test values as reference regarding the life of a round wire coil spring because there is individual difference to a certain extent and the installation conditions are complicated.
The usage count varies with the operating temperature, environment, and amount of deformation. To increase the usage count, it is recommended to use the spring up to 70% of the allowable displacement Fmax..
Question:Question: What are the JIS standards for general spring-related materials?: Answer:Answer: Piano wires: JIS G 3522
Iron wires: JIS G 3532
Hard drawn steel wires: JIS G 3521
Stainless steel wires for springs: JIS G 4313
Question:Question: What influence will the usage without a spring rail have on the spring?: Answer:Answer: The usage without a spring rail will cause buckling of the spring, bending of its body and other problems, leading to breakage due to high stress locally generated on the inner side of the bending part. To ensure the service life of the spring, install the spring using the shaft, outer diameter guide rail, etc.
※Basically, it is ideal to use the spring on the intermediate shaft of the inner diameter side guide rail, passing it through from the upper surface to the lower surface.
Question:Question: What influence will the usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) have on the spring?: Answer:Answer: The usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) will cause high stress breakage above the calculated value on the section. In addition, near the solid length, the effective coil part will gradually get close and the spring constant will increase. Therefore, be sure to use within the allowable displacement Fmax.(mm).
Question:Question: What is the difference between a piano steel wire spring and a hard drawn steel wire spring?: Answer:Answer: There is little difference in appearance between the two materials. In short, the piano wire is an advanced material, and the hard drawn steel wire is a general material.
The piano wire is often used as a spring for precision machinery while the hard drawn steel wire is mostly used as a peripheral spring for groceries or blinds.
They are both high-carbon steels with almost the same chemical composition. The production of piano wires is time-consuming and they are expensive because there is additional standardized management and inspection of impurities, the depth of surface scars, and the depth of decarburized layer.
Although the subtle difference is invisible to the naked eye, it has a great influence on the quality of the spring.

Check other FAQ (2 items) HideĐóng.

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C-UH10-30
C-UH10-35
C-UH13-20
C-UM4-10
C-UM4-15
C-UM4-20

Standard Unit Price	Minimum order quantity	Volume Discount	Days to ShipSố ngày giao hàng	Free Length L (mm)	Inner Dia. D-2d (or D) (Ø)	Outer Dia. D (or D1) (Ø)	Height with the max. load applied ([Free Length] – [Allowable Deflection]) (mm)	Spring Constant (N/mm)	Allowable Load (Configurable Range) (N)	Max. Load (N)	Wire Dia. (Ø)	End Surface Status	Total Coils	Solid Length (mm)	Allowable Displacement (mm)
8,754 VND	1 Piece(s)	Available	Same day	30	7.4	10	21	5.9	50.01~73.00	53	1.3	With Grinding	8.8	12.7	9
9,289 VND	1 Piece(s)	Available	Same day	35	7.2	10	24.5	5.9	50.01~73.00	61.8	1.4	With Grinding	11.5	17.5	10.5
8,298 VND	1 Piece(s)	Available	Same day	20	10	13	14	9.8	50.01~73.00	58.8	1.5	With Grinding	5.1	9.2	6
3,662 VND	1 Piece(s)	Available	Same day	10	3	4	6.5	2	4.51~8.50	6.8	0.5	Without Grinding	8.8	4.9	3.5
4,951 VND	1 Piece(s)	Available	Same day	15	2.9	4	9.75	2	8.51~16.00	10.3	0.55	With Grinding	12.6	7.5	5.25
5,258 VND	1 Piece(s)	Available	Same day	20	2.8	4	13	2	8.51~16.00	13.7	0.6	With Grinding	17.5	11.1	7

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MISUMI Contact Monday to Saturday: 8:00 am - 5:00 pm Order cut off time is 5:00 pm Thứ 2 đến Thứ 7: 8 giờ sáng đến 5 giờ chiều Hạn chót đặt hàng là 5 giờ chiều

Tel:Số điện thoại:0222-361-1555
Fax:Số Fax:0222-361-2555
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MISUMI Vietnam Company Limited, Legal Representative: Tomohiro Watanabe,
phone: 0222-361-1555, e-mail: cs@misumi.com.vn, Enterprise Code: 0107514576,
Date of Issuance: 22 July 2016, Place of Issuance: Bac Ninh, Business Certificate No. 6573041568-KD dated 27 September 2016 issued by the People's Committee of Bac Ninh

Công ty TNHH MISUMI Việt Nam, Đại diện theo pháp luật: Tomohiro Watanabe,
Điện thoại: 0222-361-1555, e-mail: cs@misumi.com.vn, Mã số doanh nghiệp: 0107514576,
ngày cấp 22/7/2016, nơi cấp: Bắc Ninh, Giấy phép kinh doanh số: 6573041568-KD ngày cấp 27/9/2016 bởi UBND tỉnh Bắc Ninh

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Specification/DimensionsĐặc điểm kỹ thuật / Kích thướcĐặc điểm kỹ thuật / Kích thước

type

Free Length L(mm)

Inner Dia. D-2d (or D)(Ø)

Outer Dia. D (or D1)(Ø)

Height with the max. load applied ([Free Length] – [Allowable Deflection])(mm)

Spring Constant(N/mm)

Allowable Load (Configurable Range)(N)

Max. Load(N)

Wire Dia.(Ø)

End Surface Status

Total Coils

Solid Length(mm)

Allowable Displacement(mm)

CADCAD