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Discontinued Products

Constant Load Flat Coil Spring

Constant Load Flat Coil Spring

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  • Constant Load Flat Coil Spring
  • Constant Load Flat Coil Spring
  • Volume Discount

MISUMI

MISUMI

[Features] It is a long disc spring bent with a constant curvature, and the restoring force (load) generated when it is stretched in a straight line is constant regardless of the stroke. -Once the maximum force is reached, the force remains constant regardless of how far the stroke is extended. (Maximum power is not reached until the drum has completed approximately 1/2 revolution).

Data sheet

Part Number

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Dimensional Drawing

CFS (Constant Force Springs)
CFSB (Brackets for Constant Force Springs)
Constant Force Springs / Brackets for Constant Force Springs: Related Image
·This is not sold as a set.
Material
Main BodyDrum
EN 1.4319 Equiv.Polypropylene
Material of the Drums: CFS0.1, CFS0.2 and CFS5.2 are polyethylene, CFS3.5 is ABS.
MaterialSurface TreatmentAccessory
Main BodyShaftShaft
EN 1.4016 Equiv.

JIS−SWCH Equiv.

Nickel PlatingRetaining Ring-C Type (EN 1.4301 Equiv.)

Specification Table

Part Number
CFS2.4
CFSB2.4
Part NumberMax.
Stroke		Durability TimesSpring Plate ThicknessAccessory Plate ThicknessDD1VℓLWdY
TypeLoad (kgf)
CFS0.1 50050,0000.11.0268.25.21718103.25
0.2 35,0000.13
0.4 1,00037,000341310.225.627.6204.58
0.6 25,0000.15
0.8 1,50025,000341430.632.625
1.0 1,00019,0000.23826.227.620
1.2 1,50034,0004440.642.635
1.4 1,0009,000341325.627.620
1.8 1,5009,000341430.632.625
2.0 1,0006,0000.253826.227.620
2.2 8,0000.34425.6
2.4 6,0000.253830.632.625
2.6 9,0000.344
2.9 20,0002.054164649406.5
3.2 8,0001.0441435.637.6304.5
3.5 21,0002.054165658506.5
3.9 8,0001.0441440.642.6354.5
4.7 9,0002.01450.652.6456.5
5.2 1,5006,0000.451.060163740304.5
5.7 1,0008,0000.32.0441455.657.6506.5
All load tolerances are from 0 to +15%.
 
Part NumbertABP1P2XdDℓ1ℓ2LApplicable Constant Force Spring
TypeNo.
CFSB0.1 1.54522.53512.554.55(24.9)20.568.5CFS0.1CFS0.2 
0.4 25527.54315.565.510(35)30.489.4CFS0.4CFS0.6CFS1.4
0.8 5527.54315.5(40)35.494.4CFS0.8CFS1.8 
1.0 60304818(35)30.494.4CFS1.0CFS2.0 
1.2 6532.55320.5(50)45.4114.4CFS1.2CFS3.9 
2.2 6532.55320.5(35)30.499.4CFS2.2  
2.4 60304818(40)35.499.4CFS2.4  
2.6 6532.55320.5(40)35.4104.4CFS2.6  
2.9 7537.56325.5(56)51.4130.4CFS2.9  
3.2 6532.55320.5(45)40.4109.4CFS3.2  
3.5 7537.56325.5(65.4)60.8139.8CFS3.5  
4.7 6532.55320.5(60)55.4124.4CFS4.7  
5.2 2.58542.57128.576.5(47.4)42.3132.3CFS5.2  
5.7 26532.55320.565.5(65)60.4129.4CFS5.7  

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  1. 1
Part Number
CFS0.1
CFS0.2
CFS0.4
CFS0.6
CFS0.8
CFS1.0
CFS1.2
CFS1.4
CFS1.8
CFS2.0
CFS2.2
CFS2.4
CFS2.6
CFS2.9
CFS3.2
CFS3.5
CFS3.9
CFS4.7
CFS5.2
CFS5.7
CFSB0.1
CFSB0.4
CFSB0.8
CFSB1.0
CFSB1.2
CFSB2.2
CFSB2.4
CFSB2.6
CFSB2.9
CFSB3.2
CFSB3.5
CFSB4.7
CFSB5.2
CFSB5.7
Part Number
Standard Unit Price
Minimum order quantityVolume Discount
Standard
Shipping Days
?
RoHSLoad
(kgf) 		Applicable Constant Load Springs

15.61 €

1 Available Same day

Stock

100.1-

15.61 €

1 Available Same day

Stock

100.2-

20.53 €

1 Available Same day

Stock

100.4-

20.79 €

1 Available Same day

Stock

100.6-

22.55 €

1 Available Same day

Stock

100.8-

21.28 €

1 Available Same day

Stock

101.0-

25.70 €

1 Available Same day

Stock

101.2-

21.28 €

1 Available Same day

Stock

101.4-

24.18 €

1 Available Same day

Stock

101.8-

22.30 €

1 Available Same day

Stock

102.0-

22.55 €

1 Available Same day

Stock

102.2-

23.18 €

1 Available 5 Days 102.4-

24.18 €

1 Available 5 Days 102.6-

35.26 €

1 Available Same day

Stock

102.9-

26.07 €

1 Available Same day

Stock

103.2-

41.94 €

1 Available Same day

Stock

103.5-

27.72 €

1 Available Same day

Stock

103.9-

31.24 €

1 Available Same day

Stock

104.7-

33.37 €

1 Available Same day

Stock

105.2-

33.75 €

1 Available Same day

Stock

105.7-

11.97 €

1 Available 5 Days 10-CFS0.1,CFS0.2

14.86 €

1 Available 5 Days 10-CFS0.4,CFS0.6,CFS1.4

14.86 €

1 Available 5 Days 10-CFS0.8,CFS1.8

14.86 €

1 Available Same day

Stock

10-CFS1.0,CFS2.0

17.88 €

1 Available 5 Days 10-CFS1.2,CFS3.9

17.88 €

1 Available 5 Days 10-CFS2.2

14.86 €

1 Available 5 Days 10-CFS2.4

17.88 €

1 Available 5 Days 10-CFS2.6

17.88 €

1 Available 5 Days 10-CFS2.9

17.88 €

1 Available 5 Days 10-CFS3.2

17.88 €

1 Available 5 Days 10-CFS3.5

17.88 €

1 Available 5 Days 10-CFS4.7

20.79 €

1 Available 5 Days 10-CFS5.2

17.88 €

1 Available 5 Days 10-CFS5.7

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  1. 1

Basic Information

[Features]
  • Leaf spring with a long strip of material that is wound at a predetermined curvature. When the strip is extended
    , the resulting rewinding power (loading force) is always the same regardless of the stroke length.
  • • Once it reaches the maximum load, the above loading force is constant, no matter how much the stroke is pulled out.
    (The drums reach the max. output only after approximately half a rotation.)

Specifications/Overview

[How to Use]
1.The side on which a shaft goes through the drum is regarded as one end, and the accessory plate side as the other end.
 Mount with screws using mounting holes of the accessory plate.
2.Fix the main body, pull out the accessory plate (Fig. 1) or fix the accessory plate and pull out the main body (Fig. 2) to use.
 　
[Cautions on Use]
1.Springs are coiled around the drums, but the inside edge of the springs are not fixed to the drums.
  
 Do not pull out the stroke beyond the specified length: the spring may come off of the drum.
2.If the exact value you want is not available, select the load that is 1 level higher,　and add a counterweight to the load on the other side for adjustment.
 　
 　
3.Durability is as shown in specification table. A set of extension and contraction is counted as one cycle. If durability expectancy is exceeded, load capacity may decrease and cracks may appear partly on the spring surface.
 　
 Continuous use under such condition is dangerous. If used in pairs, both will reach the end of their service life at the same time. Please replace both of them at the same time.
 　
 The above durability times are for reference only. Actual durability may differ from the given value depending on factors such as the environment and conditions of use.
 　
4.After prestressing of springs (5 to 10 sets of extension and contraction over the entire stroke) the load will be stable.
 Load capacity may be higher before prestressing.
[Cautions on Installation]
1.Make sure the spring doesn't contact other structures.
2.Spring draw direction should be perpendicular to the shaft axis.
3.Make sure a spring doesn't contact the accessory plate when retracting.
4.Set the spring so that it can be pulled out horizontally at any time in order to avoid deflection (bending).
5.If drum and shaft do not rotate smoothly, the spring will deteriorate due to excessive force.
6.When using brackets, orient them in the position as shown in Fig. 3. Orienting them in the position as shown in Fig. 4 may cause the spring to come into contact with the installation surface of the brackets.
 　
 This may allow foreign objects such as dust inside, which can cause the spring to deteriorate.
 

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Basic Attributes

  • Load(kgf)

    • 0.1
    • 0.2
    • 0.4
    • 0.6
    • 0.8
    • 1.0
    • 1.2
    • 1.4
    • 1.8
    • 2.0
    • 2.2
    • 2.4
    • 2.6
    • 2.9
    • 3.2
    • 3.5
    • 3.9
    • 4.7
    • 5.2
    • 5.7

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  • Applicable Constant Load Springs

    • CFS0.1,CFS0.2
    • CFS0.4,CFS0.6,CFS1.4
    • CFS0.8,CFS1.8
    • CFS1.0,CFS2.0
    • CFS1.2,CFS3.9
    • CFS2.2
    • CFS2.4
    • CFS2.6
    • CFS2.9
    • CFS3.2
    • CFS3.5
    • CFS4.7
    • CFS5.2
    • CFS5.7

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  • Type

    • CFS
    • CFSB

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