SmartFlex®25 μm

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 70 mA I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (m

A)

Str

oke

(%)

Time (s)

Cu

rren

t (m

A)

0

0.5

0

1

2

3

4

1.5

2.5

3.5

0 0.3

40

20

0.4 0.5 0.6

60

80

0

0.5

0

1

2

3

4

1.5

2.5

3.5

0 0.3

40

20

0.4 0.5 0.6

60

80

Cycle time vs StressI 25°C I 50 mA I 3,5% I

Stress (MPa)

Tim

e (m

s)

50

100

150 200 250 300 3500

200

cycleactuation

cooling

actuation cycleheatingcooling

400

150

250

300

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (m

s)

Current (mA)

150

200

50

100

450

50 60 6555

250

7040

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 70 mA I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (m

s)

-10

150

200

100

-400

250

-30 -20 0 10 20 30 40 50 60

300

-10-40 -30 -20 0 10 20 30 40 50 60

150

200

100

0

250

300

50

actuation

cooling

actuation cycleheatingcooling

SmartFlex®50 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 160 mA I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (m

A)

Str

oke

(%)

Time (s)

Cu

rren

t (m

A)

180

10

0.5

0

1

2

3

4

1.5

2.5

3.5

0.2

20

60

140

100

0.4 0.6 0.80.3 0.5 0.7 0.9 10

0.5

0

1

2

3

4

1.5

2.5

3.5

0.2

20

60

140

100

0.4 0.6 0.80.3 0.5 0.7 0.9

Cycle time vs StressI 25°C I 130 mA I 3,5% I

Stress (MPa)

Tim

e (m

s)

200

400

150 200 250 3500

300

600

800

400

200

400

150 200 250 3500

300

600

800

400

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (s

)

Current (mA)

1,2

1,6

0,4

0,8

80 1000

120 140 160

1,2

1,6

0,4

0,8

80 1000

120 140 160

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 160 mA I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (m

s)

-10

600

800

200

400

-400

1000

-30 -20 0 10 20 30 40 50 60

1200

-10

600

800

200

400

-400

1000

-30 -20 0 10 20 30 40 50 60

1200

actuation

cooling

actuation cycleheatingcooling

D.SMA.94.1.14

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgr

SmartFlex®76 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 240mA I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

40

0.50

1

2

3

4

1.5

2.5

3.5

0 0.5 1 1.5 2 2.5 3 3.5

0.1

0.2

0.3

0.4

0

0.50

1

2

3

4

1.5

2.5

3.5

0 0.5 1 1.5 2 2.5 3 3.5

0.1

0.2

0.3

0.4

Cycle time vs StressI 25°C I 200 mA I 3,5% I

Stress (MPa)

Tim

e (m

s)

100 150 200 250 3500

300

400

800

1200

1600

50 400100 150 200 250 3500

300

400

800

1200

1600

50 400

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (m

s)

Current (mA)

500

2000

2500

1000

1500

160 1800

200 220 240

500

2000

2500

1000

1500

160 1800

200 220 240

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 240 mA I 240 MPa I 3,5% I

Temperature (°C)

Tim

e (m

s)

-10

1000

1500

-400

2000

-30 -20 0 10 20 30 40 50 60

2500

500

actuation

cooling

actuation cycleheatingcooling

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

SmartFlex®100 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 380mA I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

0

0.50

1

2

3

4

1.5

2.5

3.5

0 1 2 3 5

0.1

0.2

0.3

0.5

0.4

0

0.50

1

2

3

4

1.5

2.5

3.5

0 1 2 3 5

0.1

0.2

0.3

0.5

0.4

4

Cycle time vs StressI 25°C I 300 mA I 3,5% I

Stress (MPa)

Tim

e (m

s)

500

2500

1000

1500

50 100 150 200 250 3500

300

2000

3000

400

500

2500

1000

1500

50 100 150 200 250 3500

300

2000

3000

400

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (m

s)

Current (mA)

500

2000

2500

1000

1500

210 260 310 3600

3000

500

2000

2500

1000

1500

210 260 310 3600

3000actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 380 mA I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (m

s)

-10

1000

1500

500

-400

2000

-30 -20 0 10 20 30 40 50 60

2000

2500

3500

-10

1500

-400

2000

-30 -20 0 10 20 30 40 50 60

2000

2500

3500

1000

500

actuation

cooling

actuation cycleheatingcooling

D.SMA.95.1.14

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgr

SmartFlex®150 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 750mA I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

60

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 2 3 4 5

0.1

0.1

0.4

0.6

0.8

0.3

0.5

0.7

60

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 2 3 4 5

0.1

0.1

0.4

0.6

0.8

0.3

0.5

0.7

Cycle time vs StressI 25°C I 600 mA I 3,5% I

Stress (MPa)

Tim

e (m

s)

1000

4000

2000

3000

50 100 150 200 250 3500

300

5000

400

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (m

s)

Current (mA)

1000

4000

5000

2000

3000

400 450 500 550 650 7000

750

1000

4000

5000

2000

3000

400 450 500 550 650 7000

750600

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 750 mA I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (m

s)

-10

3000

4000

1000

-400

5000

-30 -20 0 10 20 30 40 50 60

7000

2000

6000

3000

4000

1000

-400

5000

-30 -20 0 10 20 30 40 50 60

7000

6000

2000

actuation

cooling

actuation cycleheatingcooling

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

SmartFlex®200 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 1.1 A I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

0

0.5

1

2

3

4

1.5

2.5

3.5

0 1 2 3 5

0.5

1

1.5

2

4

Cycle time vs StressI 25°C I 0.9 A I 3,5% I

Stress (MPa)

Tim

e (s

)

1

5

2

3

50 100 150 200 250 3500

300

4

6

400

1

5

2

3

50 100 150 200 250 3500

300

4

6

400

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (s

)

Current (A)

1

4

5

2

3

0,75 0.8 10

6

0.9 1.1

1

4

5

2

3

0,75 0.8 10

6

0.9 1.1

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 1,1 A I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (s

)

-10

4

6

2

-400

8

-30 -20 0 10 20 30 40 50 60

10

12

-10

4

6

-400

8

-30 -20 0 10 20 30 40 50 60

10

12

2

actuation

cooling

actuation cycleheatingcooling

D.SMA.96.1.14

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgr

SmartFlex®300 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 2.1 A I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

60

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 2 3 4 5

0.5

1

2

3

1.5

2.5

3.5

7 860

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 2 3 4 5

0.5

1

2

3

1.5

2.5

3.5

7 8

Cycle time vs StressI 25°C I 1,8 A I 3,5% I

Stress (MPa)

Tim

e (s

)

8

50 100 150 200 250 3500

300 400

2

6

4

10

8

50 100 150 200 250 3500

300 400

2

6

4

10actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (s

)

Current (A)

6

10

8

1.2 1.4 1.80

1.6

4

2

2

6

10

8

1.2 1.4 1.80

1.6

4

2

2

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 2,1 A I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (s

)

-10

10

15

-40

20

-30 -20 0 10 20 30 40 50 60

25

0

5

actuation

cooling

actuation cycleheatingcooling

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

SmartFlex®400 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 3.8 A I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

0

0.5

1

2

3

4

1.5

2.5

3.5

1 2 3 5

2

4

5

4

3

1

0

00

0.5

1

2

3

4

1.5

2.5

3.5

1 2 3 5

2

4

5

4

3

1

0

0 6 7 98

Cycle time vs StressI 25°C I 3 A I 3,5% I

Stress (MPa)

Tim

e (s

)

2

10

4

6

50 100 150 200 250 3500

300

8

12

400

14

16

2

10

4

6

50 100 150 200 250 3500

300

8

12

400

14

16

actuation

cooling

actuation cycleheatingcooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (s

)

Current (A)

12

14

2

16

10

8

6

4

2

02.4 2.8 3.2 3.6 4

12

14

2

16

10

8

6

4

2

02.4 2.8 3.2 3.6 4

actuation

cooling

actuation cycleheatingcooling

Cycle time vs TemperatureI 3,8 A I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (s

)

0-10

10

15

-40

20

-30 -20 10 20 30 40 50 60

25

5

30

35

40

-10

10

15

-40

20

-30 -20 10 20 30 40 50 60

25

5

30

35

40

0

actuation

cooling

actuation cycleheatingcooling

D.SMA.97.1.14

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgr

SmartFlex®500 μm

Stroke vs TimeI 1st cycle I L 100 mm I 25°C I 5.7 A I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

110

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 3 5 7 9

1

2

4

6

3

5

7

13110

0.5

0

1

2

3

4

1.5

2.5

3.5

0 1 3 5 7 9

1

2

4

6

3

5

7

13

Cycle time vs StressI 25°C I 4 A I 3,5% I

Stress (MPa)

Tim

e (s

)

23

100 150 200 250 35015

300 400

17

21

19

25

50

23

100 150 200 250 35015

300 400

17

21

19

25

50

Stress (MPa)

Tim

e (s

)

2

100 150 200 250 3500

300 400

0,5

1,5

1

2,5

50

2

100 150 200 250 3500

300 400

0,5

1,5

1

2,5

50

actuationheating

actuationactuation cyclecooling

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Current (A)

Tim

e (s

)

23

3,4 3,8 4,2 4,6 5,415

5 5,8

17

21

19

25

3

23

3,4 3,8 4,2 4,6 5,415

5 5,8

17

21

19

25

3

Current (A)

Tim

e (s

)

4

3,4 3,8 4,2 4,6 5,40

5 5,8

1

3

2

5

3

4

3,4 3,8 4,2 4,6 5,40

5 5,8

1

3

2

5

3

actuationactuation cyclecooling

actuationheating

Cycle time vs TemperatureI 5,7 A I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (s

)

0

20

-40

30

-30 -20 10 20 30 40 50 60

40

50

60

-100

10

actuation

cooling

actuation cycleheatingcooling

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

Increased cooling time performances

SmartFlex®500 μm withsilicon sleeve

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

Tim

e (s

)

Current (A)

6

7

6

8

5

4

3

2

1

06.5 7 8 8.5 9.57.5 9

6

7

6

8

5

4

3

2

1

06.5 7 8 8.5 9.57.5 9

actuation

cooling

actuation cycleheatingcooling

Different cooling methods improving response time after actuation.Speed performance's increasing

Standard air convection 1:1Solid Heat Sink Materials 2:1Forced Air 4:1Heat Conductive Grease 8:1Silicon 10:1Oil Immersion 25:1Water with Glycol 100:1

Cycle time vs TemperatureI 8,5 A I 200 MPa I 3,5% I

Temperature (°C)

Tim

e (s

)

00-10

1

-40

3

-30 -20 10 20 30 40 50 60

4

5

6

2

actuation

cooling

actuation cycleheatingcooling

Stroke vs Time First cycle I L 100 mm I 25°C I 8,5 A I 170 MPa I

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

Str

oke

(%)

Time (s)

Cu

rren

t (A

)

60

0.5

0

1

2

3

4

1.5

2.5

3.5

0 2 4

2

6

10

8

8

4

Cycle time vs StressI 25°C I 8,5 A I 3,5% I

Stress (MPa)

Tim

e (s

)

2

0,5

1

100 150 200 250 300 4000

350

1,5

2,5

3

3,5

actuation

cooling

actuation cycleheatingcooling

* Getting quicker time response requires more current to heat the wire

D.SMA.98.1.14

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgr

SmartFlex®300 μm with

silicon sleeve

m a k i n g i n n o v a t i o n h a p p e n , t o g e t h e r

oupgrSAES Groupwww.saesgroup.comsma@saes‐group.com

Increased cooling time performances

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

0,0

0,5

1,0

1,5

2,0

2,5

2,6 2,8 3 3,2 3,4 3,6 3,8 4

Tim

e (s

)

Current (A)

cycle

cooling

actua�on

Different cooling methods improving response time after actuation Speed performance's increasing

Standard air convection 1:1Solid Heat Sink Materials 2:1Forced Air 4:1Heat Conductive Grease 8:1Silicon 10:1Oil Immersion 25:1Water with Glycol 100:1

Cycle time vs TemperatureI 3,5 A I 170 MPa I 3,5% I

0,0

1,0

2,0

3,0

4,0

5,0

6,0

-20 -10 0 10 20 30 40 50 60

Tim

e (s

)

Temperature (°C)

cycle

cooling

actua�on

Stroke vs Time First cycle I L 100 mm I 25°C I 3,5 A I 170 MPa I

0

1

2

3

4

5

0

0,5

1

1,5

2

2,5

3

3,5

4

0 1 2 3 4

Curr

ent (

A)

Stro

ke (%

)

Time (s)

Cycle time vs StressI 25°C I 3,5 A I 3,5% I

0,0

0,5

1,0

1,5

2,0

2,5

100 150 200 250 300 350 400

Tim

e (s

)

Stress (MPa)

cycle

cooling

actua�on

* Getting quicker time response requires more current to heat the wire

Increased cooling time performances

SmartFlex®400 μm withsilicon sleeve

Cycle time vs CurrentI 25°C I 170 MPa I 3,5% I

0,0

0,5

1,0

1,5

2,0

2,5

3,0

4,5 5 5,5 6 6,5 7

Tim

e (s

)

Current (A)

cycle

cooling

actua�on

Different cooling methods improving response time after actuation Speed performance's increasing

Standard air convection 1:1Solid Heat Sink Materials 2:1Forced Air 4:1Heat Conductive Grease 8:1Silicon 10:1Oil Immersion 25:1Water with Glycol 100:1

Cycle time vs TemperatureI 6,0 A I 170 MPa I 3,5% I

0,0

1,0

2,0

3,0

4,0

5,0

6,0

-20 -10 0 10 20 30 40 50 60

Tim

e (s

)

Temperature (°C)

cycle

cooling

actua�on

Stroke vs Time First cycle I L 100 mm I 25°C I 6,5 A I 170 MPa I

0

1

2

3

4

5

6

7

8

9

10

0,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

4,0

0 1 2 3 4

Curr

ent (

A)

Stro

ke (%

)

Time (s)

Cycle time vs StressI 25°C I 6,0 A I 3,5% I

0,0

0,5

1,0

1,5

2,0

2,5

100 150 200 250 300 350 400

Tim

e (s

)

Stress (MPa)

cycle

cooling

actua�on

* Getting quicker time response requires more current to heat the wire

D.SMA.156.0.17

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

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CRIMPSfor SmartFlex®Wires

CRIMP Barrel 4 mm CRIMP Barrel 2 mm

Typical delivery packaging Design parameters to order crimped Smartflex wire

LaLb LaLb

Typical Pull‐Out Max Force [N]

Wire Diameter [μm] 50 76 100 150 200

Barrell 4 mm 1,6 3,6 6,3 14 25

Barrell 2 mm 1,2 2,7 4,7 10 ‐

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If your application requires an electro‐mechanical termination we can support you with different crimp solutions according to yourrequirements. Our standard solutions are specified below. For new design we are available to study and develop customized partfor you. Crimped Smartflex wires can be ordered both for prototypes and large volume production.

Barrel Crimp

CRIMPSfor SmartFlex®Wires

D.SMA.99.15.16

Design parameters to order crimped Smartflex wire Ring Type CrimpTypical Pull‐Out Max Force [N]

Wire Diameter [μm] 150 200 300Ring Type 10 19 35

Design parameters to order crimped Smartflex wire T Type Crimp

Typical Pull‐Out Max Force [N]Wire Diameter [μm] 100 180T type 4,7 15

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

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Book Crimp

Typical Pull‐Out Max Force [N]Wire Diameter [μm] 400 500T type 50 80

NOTE: SAES can support you to studyand develop different book crimp toweld on PCB

Design parameters to order crimped Smartflex wire

SmartFlex®Springs“Shape MemorySprings for Actuators”

COMPRESSIONSPRINGS

Mechanical and functional characteristics of some exemplifying compression spring

D [mm]Mean Diameter

L0 [mm]Free Length

d [mm]Wire Diameter

F [N]Typical Force

s [mm]Typical Stroke

14 130 1,5 20 3010 25 1,5 14 89 16 2,2 50 26 18 1,5 30 33 8 0,6 2 2

Available Ends under request

Typical behaviour of a SMA compression spring

Forc

e

Stroke

Bias

Spr

ing

Austenite

Martensite

B

A

s

heat

ingco

oling

SMA SpringBias Spring

Stroke

BAs

SMA SpringBias Spring

Stroke

BAs

Force

SMA compression springs can be used as very fast and miniaturized thermal‐actuators. When heated above As (austenite start temperature) they expand developing an high force.

SMA compression springs can be customized according to your design andapplication requirements.

Mean Dia.D

Wire Dia.d

Pitch, p

Coil angle, α

FreeLength

Lo

Mean Dia.D

Wire Dia.d

Pitch, p

Coil angle, α

FreeLength

Lo

Plain Ends

Closed Ends

Closed EndsGround

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SmartFlex®Springs“Shape MemorySprings for Actuators”

TENSILE SPRINGS

D.SMA.101.1.14

Typical behaviour of a SMA tensile spring

Forc

e

Stroke

Bias SpringAustenite

Martensite

A

B

s

heatingcooling

Forc

e

Stroke

Bias SpringAustenite

Martensite

A

B

s

heatingcooling

SMA Spring Bias Spring

Stroke

BAs

Force

SMA tensile springs can be used as very fast and miniaturized thermal‐actuators. When heated above As (austenite starttemperature) they contracts developing an high force.

SMA tensile springs can be customized according to your designand application requirements.

Mean Dia.D

Wire Dia.d

Pitch, p

Coil angle, α

FreeLength

Lo

Mean Dia.D

Wire Dia.d

Pitch, p

Coil angle, α

FreeLength

Lo

Α

Α

Sez. Α−Α

1 mm

Α

Α

Sez. Α−Α

1 mm

Full twisted loop Open loop with

special hook

Mechanical and functional characteristics of some exemplifying tensile spring

D [mm]Mean Diameter

L0 [mm]Free Length

d [mm]Wire Diameter

F [N]Typical Force

s [mm]Typical Stroke

12 60 1,5 10 1608 12 1,5 20 65 30 0,8 3 100

The SAES Group manufacturing companies are ISO9001 certified, the Asian and Italian companiesare also ISO14001 certified. Full information about our certifications for each company of theGroup are available on our website at: www.saesgroup.com

© SAES Group. Printed in Italy. All rights reserved. SAES® and SmarFlex® are registered trademarks of SAES Group. SAES Group

reserves the right to change or modify product specifications at any time without notice.

Available Ends under request

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