What is the difference between a butterfly spring and a coil spring?

1. The butterfly spring can be installed in small spaces with large load, and its characteristics can be varied in a wide range through combination of use. 2. When bearing load, it can get larger stroke. It has the load characteristics of low hysteresis and high reproducibility during compression and decompression.

What types of disc spring materials are available in the market?

The standard material is 60Si2Mn, while the best material should be 50CrV4, equivalent to the imported steel 51CrV4. The rest are unconventional materials such as stainless steel.

Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

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Part Number Complete

E-SRBN8A

Outer Dia. D Inner Dia. d Load Type Plate Thickness t Free State Height H Total Deflection h type CAD Days to Ship

Specification/Dimensions

Outer Dia. D(Ø)
8

10

12.5

14

16

18

20

22.5

25

28

31.5

35.5

40

45

50
Clear
Inner Dia. d(Ø)
4.2

5.2

6.2

7.2

8.2

9.2

10.2

11.2

12.2

14.2

16.3

18.3

20.4

22.4

25.4
Clear
Load Type
- B
- A
Clear
Plate Thickness t(mm)
0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.25

1.5

1.75

2

2.25

2.5

3
Clear
Free State Height H(mm)
0.55

0.6

0.7

0.75

0.85

0.9

1

1.05

1.1

1.2

1.25

1.35

1.4

1.45

1.55

1.6

1.75

1.8

2.05

2.15

2.25

2.45

2.65

2.8

3.05

3.15

3.4

3.5

4.1
Clear
Total Deflection h(mm)
0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.65

0.7

0.8

0.9

1

1.1

1.15

1.3

1.4
Clear
type
- E-SRBN
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

Same day

10 Day(s) or Less
Clear

Specify Alterations

Disc Springs【50-100 Pieces Per Package】

Volume Discount

Check FAQ of this product (2 items)

Brand :

MiSUMi Economy

Part Number :

E-SRBN8A

E-SRBN8B

E-SRBN10A

E-SRBN10B

E-SRBN12.5A

E-SRBN12.5B

E-SRBN14A

E-SRBN14B

E-SRBN16A

E-SRBN16B

E-SRBN18A

E-SRBN18B

E-SRBN20A

E-SRBN20B

E-SRBN22.5A

E-SRBN22.5B

E-SRBN25A

E-SRBN25B

E-SRBN28A

E-SRBN28B

E-SRBN8A

Order Qty :
Total Price :

---
Days to ship :

---

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Product Description

Disc Springs
Disc Springs also known as belleville spring are an economy item, The price is cheaper than the MISUMI standard product. They offer a wide variety of sizes to choose from.
[Feature]
● Outer Diameter Minimum/Maximum (mm.) : 8 and 50
● Inner Diameter Minimum/Maximum (mm.) : 4.2 and 25.4
● Free State Height Minimum/Maximum (mm.) : 0.55 and 4.1 (depend on product code)
● Material : 50CrVA
● Surface treatment : Phosphating
[Application]
Disc springs are utilized in bolted joints to maintain the desired preload force.

Economy Disc Spring

Compact DesignHigh Load CapacityConsistent Quality

- Design: Cone-shaped disc design for efficient load distribution.

- Material: 50CrVA steel for strength and durability.

- Size Range: Varied outer and inner diameters to suit different applications.

- Fastener with bulk packaging options

- High Load Capacity: Handles large loads with minimal deformation.

MISUMI Standard

Cheaper Price

Product Variety

3D CAD
3D CAD Support

Disc Springs Product Overview

Overview
The Disc Springs is a cone -shaped disc-like spring that is made by drilling the center of a disc. Unlike conventional springs, it has special functions.
Capable of withstanding large loads with small deformation, it features short stroke, less space, easy combination, maintenance and replacement, enhanced level of economy and safety, and long service life.
Meanwhile, it is also considered as a spring that is difficult to design. When used in a stacked manner, a slight dimensional difference may impose great impact on the load, and cause a reversed relationship between displacement and load.

Disc Springs Product Features

Features of Disc Springs
1. Large stiffness, strong shock absorbing and vibration absorption ability, bearing large load with small deformation, and suitable for small axial space requirements
2. This spring has variable stiffness.
3. Using the same disc spring with different combinations can make the spring characteristics change in a large range
It can be used in different combinations, such as parallel overlapping, in-line combination, or parallel and in-line combination.

■ Difference between MISUMI Economy series and generic products in the market

Products circulating on the market *	MISUMI economy series
24H Salt Spray Test Results	48H Salt Spray Test Results
Surface treatment: blackening	Surface treatment: parkerizing

■ Dimensional Consistency Performance Test

Products circulating on the market *	MISUMI economy series
30PC Consistency Test (CPK)	50PC Consistency Test (CPK)
Deviation of Spring Height (H0) CPK=0.48	Deviation of Spring Height (H0) CPK=1.48	The dimensional consistency of the product is 3 times that of the products circulating on the market.
Overlapping use can result in unstable performance	Ensure stable performance during overlapping use

・When used in combination, the truncated cone height and disc thickness of the disc spring has a great impact on its performance. If the dimensional consistency is not high, stress may be unevenly distributed in the cross section. In this case, a good CPK index can effectively improve its fatigue strength and shock absorbing capability of the material per unit volume. The service life is thus improved.
* Generic products in 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.

Disc Springs Dimensional Drawing

・Material Table

Material: 50CrVA

Surface treatment: parkerizing

Disc Springs Usage Method

Disc Springs Example of Use

Disc Springs Precautions

Changes in inner and outer diameters during compression
Precautions for disc springs - Disc spring coefficient

* When the stroke of the Disc Springs is greater than 75%, the load increase will be limited, but it has a great impact on its service life. Therefore, its optimal operating range is between 10~75% of its maximum displacement.
* When Disc Springss are used in combination, a guide rod or guide sleeve is required for the inner diameter or outer diameter, and the spring shape may change with the compression, so it is important to consider the gap between the spring and the guide part.

Inner Diameter/Outside diameter (mm)	Recommended gap (mm)
15 or Less	0.2
20 or Less	0.3
26 or Less	0.4
45 or Less	0.6
75 or Less	0.8
140 or Less	1.0
250 or Less	1.6

(Not guaranteed values and for reference only)

Disc Springs Related Products

Reason for recommendation: The tension spring with standard fixed length is a heavy load type spring capable of bearing large load and having short delivery time.

Reason for recommendation: The O.D. referenced-type stainless steel spring is a high quality choice for you.

Reason for recommendation: The stainless steel torsion spring provides arm angle options of 90°, 180° and 135°, for which alteration can be made.

Part Number

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

: 30; 45; 60

Part Number
E-SRBN8A
E-SRBN8B
E-SRBN10A
E-SRBN10B
E-SRBN12.5A
E-SRBN12.5B
E-SRBN14A
E-SRBN14B
E-SRBN16A
E-SRBN16B
E-SRBN18A
E-SRBN18B
E-SRBN20A
E-SRBN20B
E-SRBN22.5A
E-SRBN22.5B
E-SRBN25A
E-SRBN25B
E-SRBN28A
E-SRBN28B
E-SRBN31.5A
E-SRBN31.5B
E-SRBN35.5A
E-SRBN35.5B
E-SRBN40A
E-SRBN40B
E-SRBN45A
E-SRBN45B
E-SRBN50A
E-SRBN50B

Price	Minimum Order Qty.	Number of pc(s). included in pkg.	Volume Discount	Days to Ship	RoHS	Outer Dia. D (Ø)	Inner Dia. d (Ø)	Load Type	Plate Thickness t (mm)	Free State Height H (mm)	Total Deflection h (mm)
₹ 1,082.66	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	8	4.2	A	0.3	0.55	0.25
₹ 1,085.43	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	8	4.2	B	0.4	0.6	0.2
₹ 1,117.08	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	10	5.2	A	0.4	0.7	0.3
₹ 435.75	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	10	5.2	B	0.5	0.75	0.25
₹ 1,191.55	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	12.5	6.2	A	0.5	0.85	0.35
₹ 1,204.09	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	12.5	6.2	B	0.7	1	0.3
₹ 1,227.44	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	14	7.2	A	0.5	0.9	0.4
₹ 1,307.46	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	14	7.2	B	0.8	1.1	0.3
₹ 1,362.63	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	16	8.2	A	0.6	1.05	0.45
₹ 1,394.26	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	16	8.2	B	0.9	1.25	0.35
₹ 1,448.17	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	18	9.2	A	0.7	1.2	0.5
₹ 1,489.46	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	18	9.2	B	1	1.4	0.4
₹ 1,515.74	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	20	10.2	A	0.8	1.35	0.55
₹ 1,594.26	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	20	10.2	B	1.1	1.55	0.45
₹ 1,609.55	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	22.5	11.2	A	0.8	1.45	0.65
₹ 1,736.30	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	22.5	11.2	B	1.25	1.75	0.5
₹ 1,810.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	25	12.2	A	0.9	1.6	0.7
₹ 2,702.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	25	12.2	B	1.5	2.05	0.55
₹ 2,670.00	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	28	14.2	A	1	1.8	0.8
₹ 3,370.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	28	14.2	B	1.5	2.15	0.65
₹ 3,514.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	31.5	16.3	A	1.25	2.15	0.9
₹ 4,184.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	31.5	16.3	B	1.75	2.45	0.7
₹ 4,099.00	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	35.5	18.3	A	1.25	2.25	1
₹ 5,440.00	1 Pack(s)	100 Pieces Per Package	Available	10 Day(s)	10	35.5	18.3	B	2	2.8	0.8
₹ 5,253.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	40	20.4	A	1.5	2.65	1.15
₹ 6,907.00	1 Pack(s)	100 Pieces Per Package	Available	Same day	10	40	20.4	B	2.25	3.15	0.9
₹ 3,874.00	1 Pack(s)	50 Pieces Per Package	Available	10 Day(s)	10	45	22.4	A	1.75	3.05	1.3
₹ 5,943.00	1 Pack(s)	50 Pieces Per Package	Available	Same day	10	45	22.4	B	2.5	3.5	1
₹ 5,105.00	1 Pack(s)	50 Pieces Per Package	Available	Same day	10	50	25.4	A	2	3.4	1.4
₹ 7,604.00	1 Pack(s)	50 Pieces Per Package	Available	Same day	10	50	25.4	B	3	4.1	1.1

Specification Table

Part Number	Outer Diameter (D)	Load Type	Tolerance (D) mm	I.D. (d) mm	Tolerance (d) mm	Plate Thickness (t) mm	Free Height Ho mm	Tolerance (Ho) mm	Maximum Deflection (h) mm	Load (75% Deflection) N
Type	D	Load Type	Tolerance (D) mm	I.D. (d) mm	Tolerance (d) mm	Plate Thickness (t) mm	Free Height Ho mm	Tolerance (Ho) mm	Maximum Deflection (h) mm	Load (75% Deflection) N
Economy series	8	A	0 -0.15	4.2	0.15 0	0.3	0.55	+0.1 -0.05	0.25	119
	8	B		4.2		0.4	0.6		0.2	210
	10	A		5.2		0.4	0.7		0.3	213
	10	B		5.2		0.5	0.75		0.25	323
	12.5	A	0 -0.18	6.2		0.5	0.85		0.35	294
	12.5	B		6.2		0.7	1		0.3	657
	14	A		7.2		0.5	0.9		0.4	274
	14	B		7.2		0.8	1.1		0.3	813
	16	A		8.2		0.6	1.05		0.45	411
	16	B		8.2		0.9	1.25		0.35	1029
	18	A		9.2		0.7	1.2		0.5	568
	18	B		9.2		1	1.4		0.4	1274
	20	A	0 -0.21	10.2	0.18 0	0.8	1.35		0.55	745
	20	B		10.2		1.1	1.55		0.45	1520
	22.5	A		11.2		0.8	1.45		0.65	710
	22.5	B		11.2		1.25	1.75	+0.15 -0.08	0.5	1950
	25	A		12.2		0.9	1.6	+0.10 -0.05	0.7	868
	25	B		12.2		1.5	2.05	+0.15 -0.08	0.55	2910
	28	A		14.2		1	1.8	+0.10 -0.05	0.8	1110
	28	B		14.2		1.5	2.15	+0.15 -0.08	0.65	2850
	31.5	A	0 -0.25	16.3		1.25	2.15		0.9	1920
	31.5	B		16.3		1.75	2.45		0.7	3900
	35.5	A		18.3	0.21 0	1.25	2.25		1	1700
	35.5	B		18.3		2	2.8		0.8	5190
	40	A		20.4		1.5	2.65		1.15	2620
	40	B		20.4		2.25	3.15	+0.20 -0.10	0.9	6540
	45	A		22.4		1.75	3.05	+0.15 -0.08	1.3	3660
	45	B		22.4		2.5	3.5	+0.20 -0.10	1	7720
	50	A		25.4		2	3.4	+0.15 -0.08	1.4	4756
	50	B		25.4		3	4.1	+0.20 -0.10	1.1	11964

The load is reference value.

"h" is the dimension of the load (at 75% displacement).

Basic Information

Material	Spring Steel

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 difference between a butterfly spring and a coil spring?: Answer: 1. The butterfly spring can be installed in small spaces with large load, and its characteristics can be varied in a wide range through combination of use.
2. When bearing load, it can get larger stroke. It has the load characteristics of low hysteresis and high reproducibility during compression and decompression.
Question: What types of disc spring materials are available in the market?: Answer: The standard material is 60Si2Mn, while the best material should be 50CrV4, equivalent to the imported steel 51CrV4. The rest are unconventional materials such as stainless steel.

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