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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

EIM025B 03 S

Cost
$0.00
$0.00
Price
$0.00
Weight
0.00 lb.
Direction of Wind
Factory Option
Ends
Standard Loops
Finish
Passivate per ASTM A967
Material
Stainless Steel
Total Coils
36.000
Published Stock Code
EIM025B03S
Product Type
Extension Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.09
Rate (kg/cm)
0.09
Rate (lb/in)
0.51
Rate (gm/mm)
9.10
Weight per Item (lb)
0.00
Material Specification
ASTM A313
Free Length (cm)
1.250
Free Length (inch)
0.492
Free Length (mm)
12.500
Free Length - Build Spec (in)
0.49
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)
0.20
Inside Diameter (in)
0.08
Inside Diameter (mm)
1.98
Outside Diameter (cm)
0.249
Outside Diameter (in)
0.10
Outside Diameter (mm)
2.49
Outside Diameter - Build Spec (in)
0.10
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)
91.00
Rate (kg/mm)
0.01
Rate (N/cm)
0.89
Rate - Build Spec (lb/in)
0.51
Rate Tolerance (gm/cm)
9.10
Rate Tolerance (gm/mm)
0.91
Rate Tolerance (kg/cm)
0.01
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.05
Rate Tolerance (N/cm)
0.09
Rate Tolerance (N/mm)
0.01
Rate Tolerance - Build Spec (lb/in)
0.05
Total Coils - Build Spec
35.97
Wire Diameter (cm)
0.03
Wire Diameter (inch)
0.01
Wire Diameter (mm)
0.25
Wire Diameter - Build Spec (in)
0.01
Material Short Description
SS
Product Series
Instrument Extension Series (metric)
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)
0.15
Initial Tension (kg)
0.02
Initial Tension (gm)
15.10
Initial Tension Tolerance - Build Spec. (lb)
0.01
Initial Tension Tolerance (lb)
0.01
Initial Tension Tolerance (N)
0.03
Initial Tension Tolerance (kg)
0.00
Initial Tension Tolerance (gm)
3.02
Inside Diameter Tolerance - Build Spec (in)
REF
Max Load - Build Spec. (lb)
0.46
Max Load (lb)
0.46
Max Load (kg)
0.21
Max Load (gm)
207.80
Max Extended Length - Build Spec. (in)
1.33
Max Extended Length (in)
1.33
Max Extended Length (mm)
33.83
Max Extended Length (cm)
3.38
Body Length - Build Spec. (in)
0.34
Body Length (in)
0.34
Body Length (mm)
8.53
Body Length (cm)
0.85
Loop Inside Diameter - Build Spec. (in)
0.08
Loop Inside Diameter (in)
0.08
Loop Inside Diameter (mm)
1.98
Loop Inside Diameter (cm)
0.20
Loop Position
Random
Loop Opening - Build Spec. (in)
0.01
Loop Opening (in)
0.01
Loop Opening (mm)
0.25
Loop Opening (cm)
0.03
Max Load (N)
2.04
Inside Diameter - Build Spec (in)
0.08
Model Code
EIM

Extension Spring: OD 2.49 mm, FL 12.5 mm, Stainless Steel

Instrument Extension Series (metric)

Precision Springs for Precision Products.

Lee Spring EIM025B 03 S is a precision extension spring from the Instrument Extension Series (metric) series, engineered for applications requiring reliable quality extension springs. This spring features a 2.49-mm outside diameter (0.098 inch) with 1.98-mm loop inside diameter (0.078 inch) and extends from a free length of 12.5 mm (0.492 inch) to a maximum extended length of 33.83 mm (1.332 inch). Made from Stainless Steel with a 0.25-mm wire diameter (0.01 inch), the spring delivers a spring rate of 0.089 N/mm (0.51 lb/inch) through its 36 total coils with an initial tension of 0.148 N (0.0333 lb) for predictable extension behavior. The spring supports a maximum load of 2.038 N (0.4581 lb) at full extension with a body length of 8.53 mm (0.336 inch). The spring features Random loop position and Passivate per ASTM A967 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 (metric) 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

236741
Product Extension OD 0.098 in, Length 0.492 in, Stainless Steel
Product Extension OD 2.49 mm, Length 12.5 mm, Stainless Steel
Part Number EIM025B 03 S
Series Instrument Extension Series (metric)
Outside Diameter (inch) 0.098
Outside Diameter (cm) 0.249
Outside Diameter (mm) 2.49
Wire Diameter (inch) 0.01
Wire Diameter (cm) 0.025
Wire Diameter (mm) 0.25
Max Load (gm) 207.8
Max Load (lb) 0.4581
Max Load (kg) 0.2078
Max Load (N) 2.038
Rate (gm/cm) 91
Rate (gm/mm) 9.1
Rate (kg/cm) 0.091
Rate (kg/mm) 0.0091
Rate (lb/in) 0.51
Rate (N/cm) 0.89
Rate (N/mm) 0.089
Max Extended Length (cm) 3.383
Max Extended Length (in) 1.332
Max Extended Length (mm) 33.83
Initial Tension (gm) 15.1
Initial Tension (kg) 0.0151
Initial Tension (lb) 0.0333
Initial Tension (N) 0.148
Free Length (cm) 1.25
Free Length (inch) 0.492
Free Length (mm) 12.5
Material Stainless Steel
Loop Inside Diameter (cm) 0.198
Loop Inside Diameter (in) 0.078
Loop Inside Diameter (mm) 1.98
Ends Standard Loops
Loop Position Random
Direction of Wind Factory Option
Finish Passivate per ASTM A967
0.01 0.098 0.004 0.492 0.02 36 0.0333 0.00666 0.51 0.051 1.332 0.4581 0.01 0.336 Random 0.098 0.004 0.492 0.02 36 0.0333 0.00666 0.51 0.051 1.332 0.4581
Default View
Side view
Top view
Quantity Price
1 - 19 $9.210
20 - 49 $5.600
50 - 99 $2.960
100 - 199 $1.870
200 - 299 $1.566
300 - 399 $1.476
400 - 499 $1.390
500 - 599 $1.321
600 - 699 $1.253
700 - 799 $1.200
800 - 899 $1.153
900 - 999 $1.116
1000 $1.090

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geographic requirements wherever your business
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