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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

EI 007AA 04M

Cost
$0.00
$0.00
Price
$0.00
Weight
0.00 lb.
Direction of Wind
Factory Option
Ends
Standard Loops
Finish
Pre-coated with Tin
Material
Music Wire
Total Coils
43.300
Published Stock Code
EI007AA04M
Product Type
Extension Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.04
Rate (kg/cm)
0.04
Rate (lb/in)
0.23
Rate (gm/mm)
4.10
Weight per Item (lb)
0.00
Material Specification
ASTM A228
Free Length (cm)
1.113
Free Length (inch)
0.438
Free Length (mm)
11.130
Free Length - Build Spec (in)
0.44
Free Length Tolerance (cm)
0.05
Free Length Tolerance (in)
0.02
Free Length Tolerance (mm)
0.51
Free Length Tolerance - Build Spec (in)
0.02
Inside Diameter (cm)
0.16
Inside Diameter (in)
0.06
Inside Diameter (mm)
1.63
Outside Diameter (cm)
0.198
Outside Diameter (in)
0.08
Outside Diameter (mm)
1.98
Outside Diameter - Build Spec (in)
0.08
Outside Diameter Tolerance (cm)
0.01
Outside Diameter Tolerance (in)
0.00
Outside Diameter Tolerance (mm)
0.10
Outside Diameter Tolerance - Build Spec (in)
0.00
Rate (gm/cm)
41.00
Rate (kg/mm)
0.00
Rate (N/cm)
0.40
Rate - Build Spec (lb/in)
0.23
Rate Tolerance (gm/cm)
4.10
Rate Tolerance (gm/mm)
0.41
Rate Tolerance (kg/cm)
0.00
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.02
Rate Tolerance (N/cm)
0.04
Rate Tolerance (N/mm)
0.00
Rate Tolerance - Build Spec (lb/in)
0.02
Total Coils - Build Spec
43.25
Wire Diameter (cm)
0.08
Wire Diameter (inch)
0.01
Wire Diameter (mm)
0.18
Wire Diameter - Build Spec (in)
0.01
Material Short Description
MW
Product Series
Instrument Extension Series (inch)
Inside Diameter Tolerance (cm)
Reference
Inside Diameter Tolerance (in)
Reference
Inside Diameter Tolerance (mm)
Reference
Initial Tension - Build Spec. (lb)
0.03
Initial Tension (lb)
0.03
Initial Tension (N)
0.11
Initial Tension (kg)
0.01
Initial Tension (gm)
11.30
Initial Tension Tolerance - Build Spec. (lb)
0.01
Initial Tension Tolerance (lb)
0.01
Initial Tension Tolerance (N)
0.02
Initial Tension Tolerance (kg)
0.00
Initial Tension Tolerance (gm)
2.27
Inside Diameter Tolerance - Build Spec (in)
REF
Max Load - Build Spec. (lb)
0.26
Max Load (lb)
0.26
Max Load (kg)
0.12
Max Load (gm)
116.60
Max Extended Length - Build Spec. (in)
1.44
Max Extended Length (in)
1.44
Max Extended Length (mm)
36.60
Max Extended Length (cm)
3.66
Body Length - Build Spec. (in)
0.31
Body Length (in)
0.31
Body Length (mm)
7.87
Body Length (cm)
0.79
Loop Inside Diameter - Build Spec. (in)
0.06
Loop Inside Diameter (in)
0.06
Loop Inside Diameter (mm)
1.63
Loop Inside Diameter (cm)
0.16
Loop Position
Random
Loop Opening - Build Spec. (in)
0.01
Loop Opening (in)
0.01
Loop Opening (mm)
0.18
Loop Opening (cm)
0.02
Max Load (N)
1.14
Inside Diameter - Build Spec (in)
0.06
Model Code
EI

Extension Spring: OD 0.078 in, FL 0.438 in, Music Wire

Instrument Extension Series (inch)

Precision Springs for Precision Products.

Lee Spring EI 007AA 04M is a precision extension spring from the Instrument Extension Series (inch) series, engineered for applications requiring reliable quality extension springs. This spring features a 0.078-inch outside diameter (1.98 mm) with 0.064-inch loop inside diameter (1.63 mm) and extends from a free length of 0.438 inch (11.13 mm) to a maximum extended length of 1.441 inch (36.6 mm). Made from Music Wire with a 0.007-inch wire diameter (0.18 mm), the spring delivers a spring rate of 0.231 lb/inch (0.04 N/mm) through its 43.3 total coils with an initial tension of 0.025 lb (0.111 N). The spring supports a maximum load of 0.257 lb (1.143 N) at full extension with a body length of 0.31 inch (7.87 mm). The spring features Random loop position and Pre-coated with Tin finish for optimal performance.

About the Extension Spring Instrument Series

The Lee Spring Extension Spring Instrument Series includes a wide range of size and rate combinations in a smaller, highly precise spring design. Selections are sorted in ascending order based on outside diameter. Instrument Series Extension Springs are available in both inch and metric sizes. Sizes range from outside diameters from .063" up to .157" and free lengths from .250" to 1.181". Inch Series springs are available in Music Wire, Type 302 Stainless Steel and Type 316 Stainless Steel. Metric Series springs are available in Music Wire and Type 302 Stainless Steel. The Music Wire springs are made from coated wire or provided with a plating finish for light corrosion resistance. The Type 302 Stainless Steel springs are passivated, while Type 316 Stainless Steel springs are passivated and ultrasonically cleaned.

Instrument Extension Series (inch) Extension Springs have useful applications in various industries, including:

  • Medical devices
  • Firearms
  • Pharmaceutical delivery devices
  • Lighting and electrical control
  • Petro-chemical processes
  • Communication devices
  • Aerospace
  • Testing and measurement equipment
  • Marine applications
  • Automotive
  • Locks and security devices
  • Precision Instruments
  • Hardware

...and many more applications

232941
Product Extension OD 0.078 in, Length 0.438 in, Music Wire
Product Extension OD 1.98 mm, Length 11.13 mm, Music Wire
Part Number EI 007AA 04M
Series Instrument Extension Series (inch)
Outside Diameter (inch) 0.078
Outside Diameter (cm) 0.198
Outside Diameter (mm) 1.98
Wire Diameter (inch) 0.007
Wire Diameter (cm) 0.08
Wire Diameter (mm) 0.18
Max Load (gm) 116.6
Max Load (lb) 0.257
Max Load (kg) 0.1166
Max Load (N) 1.143
Rate (gm/cm) 41
Rate (gm/mm) 4.1
Rate (kg/cm) 0.041
Rate (kg/mm) 0.0041
Rate (lb/in) 0.231
Rate (N/cm) 0.4
Rate (N/mm) 0.04
Max Extended Length (cm) 3.66
Max Extended Length (in) 1.441
Max Extended Length (mm) 36.6
Initial Tension (gm) 11.3
Initial Tension (kg) 0.0113
Initial Tension (lb) 0.025
Initial Tension (N) 0.111
Free Length (cm) 1.113
Free Length (inch) 0.438
Free Length (mm) 11.13
Material Music Wire
Loop Inside Diameter (cm) 0.163
Loop Inside Diameter (in) 0.064
Loop Inside Diameter (mm) 1.63
Ends Standard Loops
Loop Position Random
Direction of Wind Factory Option
Finish Pre-coated with Tin
0.007 0.078 0.004 0.438 0.02 43.3 0.025 0.005 0.231 0.023 1.441 0.257 0.007 0.31 Random 0.078 0.004 0.438 0.02 43.3 0.025 0.005 0.231 0.023 1.441 0.257
Default View
Side view
Top view
Quantity Price
1 - 19 $8.870
20 - 49 $5.370
50 - 99 $2.840
100 - 199 $1.770
200 - 299 $1.531
300 - 399 $1.423
400 - 499 $1.327
500 - 599 $1.237
600 - 699 $1.161
700 - 799 $1.097
800 - 899 $1.043
900 - 999 $1.002
1000 $0.969

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