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Tension Springs Heavy Load【1-100 Pieces Per Package】

Volume Discount

MiSUMi Economy

- Tension Springs Heavy Load from MISUMI.
- This is an economy item; The price is cheaper than the MISUMI standard product.
- The wire material of spring can be selected 2 type SUS304WP-B or SWP-A.
- C－AWT and C－AUT are heavy load Tension springs type.
- The outer diameter of spring can be selected from 3.0 mm to 10.0 mm.
- The free length of spring can be selected from 10 mm to 60 mm.

RoHS

Part Number

Configured Part Number is shown.

Drawing/Specifications
3D Preview
Part Numbers

Product Overview

◇ Made of quality materials, the Economy series tensile springs have been localized, which greatly reduces the cost, and their cost efficiency is higher thanks to Misumi’s higher quality control performance.
◇ Stainless steel materials are imported from Japan, and anti-rust resistance is high. Stainless steel springs are also magnetic. Please be careful.
◇ Misumi's Economy series tensile springs have been standardized in specifications, that is, the maximum load of the same diameter is a certain value. Initial tension, and the spring coefficient is a reference value.

Dimensional Drawing

L = Free length D ≤ φ18mm (±1.0)
D ≥ φ18mm (±1.5)

Shape	Material
C-BUT C-AUT	SUS304-WPB

C-BWT C-AWT	Spring Steel

Specification Overview

The initial tension and the spring constant are reference values, which are different slightly depending on batches. Load {kgf} = Load N × 0.101972
Method for calculating the number of coils (reference value):
Total number of coils = (L - 2 (D - d)) / d
Effective number of coils = Total number of coils - 2
The number of coils is a reference value and may vary slightly depending on the batch.

Specification Table

Type	Coil Outer Diameter D — Free Length L		Wire Diameter dmm	Under Dynamic Load		(Initial Tension) N	(Spring Constant) N/mm
				Under Dynamic Load
				Maximum Displacement Fmax. Mm	Maximum Load N


C-AWT (Spring Steel) C-AUT (SUS304-WPB) C-BWT (Spring Steel) C-BUT (SUS304-WPB)	3—	10	0.5	2	8.8	2.16	3.24
		15		3.7			1.77
		25		6.8			0.98
	4—	15	0.6	4	11.1	2.55	2.16
		20		6.4			1.37
		30		10.9			0.78
	5-	15	0.8	2.9	20.79	5.1	5.39
		20		4.6			3.43
		25		6.4			2.45
		30		8.4			1.86
		35		10			1.57
		45		13.3			1.18
	6-	20	1	3.7	33.15	8.6	6.57
		25		5.3			4.61
		30		6.9			3.53
		35		8.3			2.94
		40		10			2.45
		55		14.3			1.71
	8-	25	1.2	5.3	41.19	9.81	5.88
		30		7.3			4.31
		35		9.1			3.43
		40		11.9			2.65
		50		15.5			2.06
		60		18.8			1.67
	10-	30	1.6	5.2	77.47	20.59	10.89
		35		6.8			8.34
		40		8.4			6.77
		45		10			5.69
		50		11.6			4.9
	12-	40	2.0	6.6	120.62	34.3	13.04
		45		7.7			11.18
		50		9.4			9.22
		60		12.1			7.16
		70		14.9			5.79
	14-	60	2.3	10.9	154.95	45.11	10.1
	16-	55	2.6	9.0	195.15	55.9	15.49
		100		22.4			6.18
		125		28.4			4.90
	18-	125	2.9	27.1	236.34	68.65	6.19
	24-	80	4.0	11.7	430.51	123.6	26.48

Load {kgf} = Load N × 0.101972

Product Features

Tension spring (also known as draw spring) is a spiral spring which bears axial tension. It has side hooks at both ends to ensure the tension source of tension spring.
When not bearing load, the coils of tension spring are generally tight without clearance.
The working principle of tension spring is to act in reverse when stretching or pulling away, and to work by using the resilience (pulling force) after stretching, so as to control the movement of machine parts, absorb and store energy, measure the force and so on.

■ Corrosion resistance: 72-hour salt spray test

· Conclusion: Rust resistance is 9 times that of market products
· Differences between economy extension springs, standard products, and market-available products

· Product information: Material: SUS304-WPB
Specifications: Wire diameter 1 mm, outer diameter 8 mm, free length 40 mm
· Test conditions: Initial length 40 mm, allowable displacement 19.2 mm, allowable load 24.52N, stretching frequency 309 times/minute

· Conclusion: Service life is 3.08 times that of market products
*Products circulating on the market are similar products randomly purchased by our company from online or offline markets
* The test data are obtained through testing by our company, which are for reference only

Precautions

[Precautions for Use]
▶Operating temperature
SWP-A type: Room temperature (0–40°C)
Stainless steel type: -10–100°C
*If used under conditions exceeding the above temperature, the load value may decrease depending on the 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.

▶Approximate usage standard: around 1,000,000 times
*The above number of times is for reference only. The number of times of use varies with the tensile direction, 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..

▶Others
· Use within the allowable displacement Fmax. (mm). If it is used under the condition of exceeding the allowable displacement, the spring may be deformed, or damaged after using only a limited number of times. Please also be careful not to stretch the tensile spring beyond the allowable displacement when installing it.
· Stainless steel springs are also magnetic. Please be careful.

Example of Use

Example of Use
Installation Diagram

The installation diagram is for reference only.

Part Number

CAD Data download and 3D preview are not available because the part number has not yet been determined.

*In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.

CAD Download

: 30; 45; 60

Part Number
C-AUT3-10
C-AUT3-10-PACK
C-AUT3-15
C-AUT3-15-PACK
C-AUT3-25
C-AUT3-25-PACK
C-AUT4-15
C-AUT4-15-PACK
C-AUT4-20
C-AUT4-20-PACK
C-AUT4-30
C-AUT4-30-PACK
C-AUT5-15
C-AUT5-15-PACK
C-AUT5-20
C-AUT5-20-PACK
C-AUT5-25
C-AUT5-25-PACK
C-AUT5-30
C-AUT5-30-PACK
C-AUT5-35
C-AUT5-35-PACK
C-AUT5-45
C-AUT5-45-PACK
C-AUT6-20
C-AUT6-20-PACK
C-AUT6-25
C-AUT6-25-PACK
C-AUT6-30
C-AUT6-30-PACK
C-AUT6-35
C-AUT6-35-PACK
C-AUT6-40
C-AUT6-40-PACK
C-AUT6-55
C-AUT6-55-PACK
C-AUT8-25
C-AUT8-25-PACK
C-AUT8-30
C-AUT8-30-PACK
C-AUT8-35
C-AUT8-35-PACK
C-AUT8-40
C-AUT8-40-PACK
C-AUT8-50
C-AUT8-50-PACK
C-AUT8-60
C-AUT8-60-PACK
C-AUT10-30
C-AUT10-30-PACK
C-AUT10-35
C-AUT10-35-PACK
C-AUT10-40
C-AUT10-40-PACK
C-AUT10-45
C-AUT10-45-PACK
C-AUT10-50
C-AUT10-50-PACK
C-AUT12-60
C-AUT12-60-PACK

Standard Unit Price	Number of pc(s). included in pkg.	Minimum order quantity	Volume Discount	Days to Ship	Free Length L (mm)	Outer Dia. D (Ø)	Allowable Load (Configurable Range) (N)	Wire Dia. (Ø)	Material	Length of Spring Used L+F (mm)	Hook Opposing Angle	Standard Spring Constant (N/mm)	Max. Load (N)	Initial Tension (N)	Max. Displacement (mm)	Sales packaging
MYR 1.87		1 Piece(s)	Available	1 Day(s) or more	10	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	12	[180° (Standard)] 180° (Standard)	3.24	8.8	2.16	2	-
MYR 177.80	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	10	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	12	[180° (Standard)] 180° (Standard)	3.24	8.8	2.16	2	Bagged
MYR 1.94		1 Piece(s)	Available	1 Day(s) or more	15	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	18.7	[180° (Standard)] 180° (Standard)	1.77	8.8	2.16	3.7	-
MYR 184.51	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	15	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	18.7	[180° (Standard)] 180° (Standard)	1.77	8.8	2.16	3.7	Bagged
MYR 2.53		1 Piece(s)	Available	6 Day(s) or more	25	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	31.8	[180° (Standard)] 180° (Standard)	0.98	8.8	2.16	6.8	-
MYR 239.86	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	25	3	8.01~15.00	0.5	[Stainless Steel Wire] SUS304-WPB	31.8	[180° (Standard)] 180° (Standard)	0.98	8.8	2.16	6.8	Bagged
MYR 1.94		1 Piece(s)	Available	1 Day(s) or more	15	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	19	[180° (Standard)] 180° (Standard)	2.16	11.1	2.55	4	-
MYR 184.51	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	15	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	19	[180° (Standard)] 180° (Standard)	2.16	11.1	2.55	4	Bagged
MYR 2.13		1 Piece(s)	Available	1 Day(s) or more	20	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	26.4	[180° (Standard)] 180° (Standard)	1.37	11.1	2.55	6.4	-
MYR 202.12	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	20	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	26.4	[180° (Standard)] 180° (Standard)	1.37	11.1	2.55	6.4	Bagged
MYR 2.79		100 Piece(s)		8 Day(s) or more	30	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	40.9	[180° (Standard)] 180° (Standard)	0.78	11.1	2.55	10.9	-
MYR 265.02	100 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	30	4	8.01~15.00	0.6	[Stainless Steel Wire] SUS304-WPB	40.9	[180° (Standard)] 180° (Standard)	0.78	11.1	2.55	10.9	Bagged
MYR 1.51		1 Piece(s)	Available	1 Day(s) or more	15	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	17.9	[180° (Standard)] 180° (Standard)	5.39	20.79	5.1	2.9	-
MYR 143.41	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	15	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	17.9	[180° (Standard)] 180° (Standard)	5.39	20.79	5.1	2.9	Bagged
MYR 2.05		1 Piece(s)	Available	1 Day(s) or more	20	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	24.6	[180° (Standard)] 180° (Standard)	3.43	20.79	5.1	4.6	-
MYR 194.57	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	20	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	24.6	[180° (Standard)] 180° (Standard)	3.43	20.79	5.1	4.6	Bagged
MYR 2.22		1 Piece(s)	Available	1 Day(s) or more	25	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	31.4	[180° (Standard)] 180° (Standard)	2.45	20.79	5.1	6.4	-
MYR 210.50	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	25	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	31.4	[180° (Standard)] 180° (Standard)	2.45	20.79	5.1	6.4	Bagged
MYR 1.94		1 Piece(s)	Available	1 Day(s) or more	30	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	38.4	[180° (Standard)] 180° (Standard)	1.86	20.79	5.1	8.4	-
MYR 184.51	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	30	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	38.4	[180° (Standard)] 180° (Standard)	1.86	20.79	5.1	8.4	Bagged
MYR 2.78		1 Piece(s)	Available	1 Day(s) or more	35	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	45	[180° (Standard)] 180° (Standard)	1.57	20.79	5.1	10	-
MYR 264.18	100 Pieces Per Package	1 Pack(s)	Available	13 Day(s) or more	35	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	45	[180° (Standard)] 180° (Standard)	1.57	20.79	5.1	10	Bagged
MYR 3.57		100 Piece(s)		8 Day(s) or more	45	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	58.3	[180° (Standard)] 180° (Standard)	1.18	20.79	5.1	13.3	-
MYR 338.82	100 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	45	5	15.01~30.00	0.8	[Stainless Steel Wire] SUS304-WPB	58.3	[180° (Standard)] 180° (Standard)	1.18	20.79	5.1	13.3	Bagged
MYR 2.03		1 Piece(s)	Available	1 Day(s) or more	20	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	23.7	[180° (Standard)] 180° (Standard)	6.57	33.15	8.6	3.7	-
MYR 192.89	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	20	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	23.7	[180° (Standard)] 180° (Standard)	6.57	33.15	8.6	3.7	Bagged
MYR 1.76		1 Piece(s)	Available	1 Day(s) or more	25	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	30.3	[180° (Standard)] 180° (Standard)	4.61	33.15	8.6	5.3	-
MYR 167.73	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	25	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	30.3	[180° (Standard)] 180° (Standard)	4.61	33.15	8.6	5.3	Bagged
MYR 2.66		1 Piece(s)	Available	1 Day(s) or more	30	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	36.9	[180° (Standard)] 180° (Standard)	3.53	33.15	8.6	6.9	-
MYR 253.28	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	30	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	36.9	[180° (Standard)] 180° (Standard)	3.53	33.15	8.6	6.9	Bagged
MYR 2.85		1 Piece(s)	Available	1 Day(s) or more	35	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	43.3	[180° (Standard)] 180° (Standard)	2.94	33.15	8.6	8.3	-
MYR 270.89	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	35	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	43.3	[180° (Standard)] 180° (Standard)	2.94	33.15	8.6	8.3	Bagged
MYR 3.01		1 Piece(s)	Available	6 Day(s) or more	40	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	50	[180° (Standard)] 180° (Standard)	2.45	33.15	8.6	10	-
MYR 285.99	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	40	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	50	[180° (Standard)] 180° (Standard)	2.45	33.15	8.6	10	Bagged
MYR 2.85		1 Piece(s)	Available	1 Day(s) or more	55	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	69.3	[180° (Standard)] 180° (Standard)	1.71	33.15	8.6	14.3	-
MYR 270.89	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	55	6	30.01~60.00	1	[Stainless Steel Wire] SUS304-WPB	69.3	[180° (Standard)] 180° (Standard)	1.71	33.15	8.6	14.3	Bagged
MYR 3.04		1 Piece(s)	Available	1 Day(s) or more	25	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	30.3	[180° (Standard)] 180° (Standard)	5.88	41.19	9.81	5.3	-
MYR 288.50	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	25	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	30.3	[180° (Standard)] 180° (Standard)	5.88	41.19	9.81	5.3	Bagged
MYR 3.29		1 Piece(s)	Available	1 Day(s) or more	30	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	37.3	[180° (Standard)] 180° (Standard)	4.31	41.19	9.81	7.3	-
MYR 312.82	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	30	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	37.3	[180° (Standard)] 180° (Standard)	4.31	41.19	9.81	7.3	Bagged
MYR 3.01		1 Piece(s)	Available	1 Day(s) or more	35	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	44.1	[180° (Standard)] 180° (Standard)	3.43	41.19	9.81	9.1	-
MYR 285.99	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	35	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	44.1	[180° (Standard)] 180° (Standard)	3.43	41.19	9.81	9.1	Bagged
MYR 3.32		1 Piece(s)	Available	5 Day(s) or more	40	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	51.9	[180° (Standard)] 180° (Standard)	2.65	41.19	9.81	11.9	-
MYR 316.18	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	40	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	51.9	[180° (Standard)] 180° (Standard)	2.65	41.19	9.81	11.9	Bagged
MYR 3.84		1 Piece(s)	Available	1 Day(s) or more	50	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	65.5	[180° (Standard)] 180° (Standard)	2.06	41.19	9.81	15.5	-
MYR 365.66	100 Pieces Per Package	1 Pack(s)	Available	13 Day(s) or more	50	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	65.5	[180° (Standard)] 180° (Standard)	2.06	41.19	9.81	15.5	Bagged
MYR 4.59		1 Piece(s)	Available	1 Day(s) or more	60	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	78.8	[180° (Standard)] 180° (Standard)	1.67	41.19	9.81	18.8	-
MYR 436.11	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	60	8	30.01~60.00	1.2	[Stainless Steel Wire] SUS304-WPB	78.8	[180° (Standard)] 180° (Standard)	1.67	41.19	9.81	18.8	Bagged
MYR 2.85		1 Piece(s)	Available	1 Day(s) or more	30	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	35.2	[180° (Standard)] 180° (Standard)	10.89	77.47	20.59	5.2	-
MYR 270.89	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	30	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	35.2	[180° (Standard)] 180° (Standard)	10.89	77.47	20.59	5.2	Bagged
MYR 3.07		1 Piece(s)	Available	1 Day(s) or more	35	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	41.8	[180° (Standard)] 180° (Standard)	8.34	77.47	20.59	6.8	-
MYR 291.86	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	35	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	41.8	[180° (Standard)] 180° (Standard)	8.34	77.47	20.59	6.8	Bagged
MYR 3.48		1 Piece(s)	Available	1 Day(s) or more	40	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	48.4	[180° (Standard)] 180° (Standard)	6.77	77.47	20.59	8.4	-
MYR 331.27	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	40	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	48.4	[180° (Standard)] 180° (Standard)	6.77	77.47	20.59	8.4	Bagged
MYR 3.75		1 Piece(s)	Available	1 Day(s) or more	45	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	55	[180° (Standard)] 180° (Standard)	5.69	77.47	20.59	10	-
MYR 356.44	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	45	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	55	[180° (Standard)] 180° (Standard)	5.69	77.47	20.59	10	Bagged
MYR 3.53		1 Piece(s)	Available	1 Day(s) or more	50	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	61.6	[180° (Standard)] 180° (Standard)	4.9	77.47	20.59	11.6	-
MYR 334.63	100 Pieces Per Package	1 Pack(s)	Available	2 Day(s) or more	50	10	60.01~110.00	1.6	[Stainless Steel Wire] SUS304-WPB	61.6	[180° (Standard)] 180° (Standard)	4.9	77.47	20.59	11.6	Bagged
MYR 5.47		100 Piece(s)		8 Day(s) or more	60	12	110.01~	2	[Stainless Steel Wire] SUS304-WPB	72.1	[180° (Standard)] 180° (Standard)	7.16	120.62	34.3	12.1	-
MYR 519.98	100 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	60	12	110.01~	2	[Stainless Steel Wire] SUS304-WPB	72.1	[180° (Standard)] 180° (Standard)	7.16	120.62	34.3	12.1	Bagged

Basic Information

Type	Standard Type

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146 Part Numbers

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Specification/Dimensions

Free Length L(mm)
10

15

20

25

30

35

40

45

50

55

60

70

80

100

125
Clear
Outer Dia. D(Ø)
3

4

5

6

8

10

12

14

16

18

24
Clear
Allowable Load (Configurable Range)(N)
- 8.01~15.00
- 15.01~30.00
- 30.01~60.00
- 60.01~110.00
- 110.01~
Clear
Wire Dia.(Ø)
0.5

0.6

0.8

1

1.2

1.6

2

2.3

2.6

2.9

4
Clear
Material
- Stainless Steel Wire
  - SUS304-WPB
- Steel Wire
  - Spring steel
Clear
Length of Spring Used L+F(mm)
12

17.9

18.7

19

23.7

24.6

26.4

30.3

31.4

31.8

35.2

36.9

37.3

38.4

40.9

41.8

43.3

44.1

45

46.6

48.4

50

51.9

52.7

55

58.3

59.4

61.6

64

65.5

69.3

70.9

72.1

78.8

84.9

91.7

122.4

152.1

153.4
Clear
Hook Opposing Angle
- 180° (Standard)
  - 180° (Standard)
- 90°
Clear
Standard Spring Constant(N/mm)
0.78

0.98

1.18

1.37

1.57

1.67

1.71

1.77

1.86

2.06

2.16

2.45

2.65

2.94

3.24

3.43

3.53

4.31

4.61

4.9

5.39

5.69

5.79

5.88

6.18

6.19

6.57

6.77

7.16

8.34

9.22

10.1

10.89

11.18

13.04

15.49

26.48
Clear
Max. Load(N)
8.8

11.1

20.79

33.15

41.19

77.47

120.62

154.95

195.15

236.34

430.51
Clear
Initial Tension(N)
2.16

2.55

5.1

8.6

9.81

20.59

34.3

45.11

55.9

68.65

123.6
Clear
Max. Displacement(mm)
2

2.9

3.7

4

4.6

5.2

5.3

6.4

6.6

6.8

6.9

7.3

7.7

8.3

8.4

9

9.1

9.4

10

10.9

11.6

11.7

11.9

12.1

13.3

14.3

14.9

15.5

18.8

22.4

27.1

28.4
Clear
Sales packaging
- Bagged
Clear
type
- C-AUT
- C-AWT
- C-BUT
- C-BWT
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

1 Day(s) or Less

2 Day(s) or Less

5 Day(s) or Less

6 Day(s) or Less

8 Day(s) or Less

9 Day(s) or Less

10 Day(s) or Less

13 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

Question: What is the initial tension?: Answer: It can be understood that when a general tensile spring is under tension, the tension measured when it is about to undergo elastic deformation without deformation (critical state) is called the initial tension. It is realized by properly controlling the process parameters in the manufacturing process of tensile spring.
MISUMI tension spring specifications (except for free designation) have been standardized, i.e. the maximum load of the same diameter is a certain value. Because the tensile spring is made on the basis of the maximum load, the initial tension and spring coefficient are the reference values.
Question: What is the life of the tensile spring?: Answer: Some hook installation methods of tension springs may cause stress concentration, so the standard use times cannot be provided. To increase the use times, it is recommended to use it under 70% of the allowable displacement Fmax.
· It is recommended to use it at room temperature below 40°C, and the load value will decrease due to service conditions at temperatures over 40°C .
Question: What is the spring constant?: Answer: The spring constant is the force necessary to give the spring unit displacement, which is used to express the characteristics of the spring.
Question: What are the JIS standards for general spring-related materials?: 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: What is the difference between a piano steel wire spring and a hard drawn steel wire spring?: 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.

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Tension Springs Heavy Load【1-100 Pieces Per Package】

Part Number

Basic Information

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Specification/Dimensions

Free Length L(mm)

Outer Dia. D(Ø)

Allowable Load (Configurable Range)(N)

Wire Dia.(Ø)

Material

Length of Spring Used L+F(mm)

Hook Opposing Angle

Standard Spring Constant(N/mm)

Max. Load(N)

Initial Tension(N)

Max. Displacement(mm)

Sales packaging

type

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Days to Ship

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Frequently asked question (FAQ)

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