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Specifications

 

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Physical Dimension

mm cm

Load

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LEM120D 12 M

Cost
$0.00
$0.00
Price
$0.00
Weight
0.04 lb.
Direction of Wind
Factory Option
Ends
Standard Loops
Finish
Zinc Plate and Bake per ASTM B633
Material
Music Wire
Total Coils
68.900
Published Stock Code
LEM120D12M
Product Type
Extension Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.53
Rate (kg/cm)
0.54
Rate (lb/in)
3.04
Rate (gm/mm)
54.30
Weight per Item (lb)
0.04
Material Specification
ASTM A228
Free Length (cm)
10.000
Free Length (inch)
3.937
Free Length (mm)
100.000
Free Length - Build Spec (in)
3.94
Free Length Tolerance (cm)
0.15
Free Length Tolerance (in)
0.06
Free Length Tolerance (mm)
1.52
Free Length Tolerance - Build Spec (in)
0.06
Inside Diameter (cm)
0.71
Inside Diameter (in)
0.28
Inside Diameter (mm)
7.11
Outside Diameter (cm)
0.950
Outside Diameter (in)
0.37
Outside Diameter (mm)
9.50
Outside Diameter - Build Spec (in)
0.37
Outside Diameter Tolerance (cm)
0.03
Outside Diameter Tolerance (in)
0.01
Outside Diameter Tolerance (mm)
0.25
Outside Diameter Tolerance - Build Spec (in)
0.01
Rate (gm/cm)
543.00
Rate (kg/mm)
0.05
Rate (N/cm)
5.32
Rate - Build Spec (lb/in)
3.04
Rate Tolerance (gm/cm)
54.30
Rate Tolerance (gm/mm)
5.43
Rate Tolerance (kg/cm)
0.05
Rate Tolerance (kg/mm)
0.01
Rate Tolerance (lb/in)
0.30
Rate Tolerance (N/cm)
0.53
Rate Tolerance (N/mm)
0.05
Rate Tolerance - Build Spec (lb/in)
0.30
Total Coils - Build Spec
68.86
Wire Diameter (cm)
0.12
Wire Diameter (inch)
0.05
Wire Diameter (mm)
1.19
Wire Diameter - Build Spec (in)
0.05
Material Short Description
MW
Product Series
Standard Extension Series (metric)
Inside Diameter Tolerance (cm)
Reference
Inside Diameter Tolerance (in)
Reference
Inside Diameter Tolerance (mm)
Reference
Initial Tension - Build Spec. (lb)
1.54
Initial Tension (lb)
1.54
Initial Tension (N)
6.85
Initial Tension (kg)
0.70
Initial Tension (gm)
698.50
Initial Tension Tolerance - Build Spec. (lb)
0.31
Initial Tension Tolerance (lb)
0.31
Initial Tension Tolerance (N)
1.37
Initial Tension Tolerance (kg)
0.14
Initial Tension Tolerance (gm)
139.71
Inside Diameter Tolerance - Build Spec (in)
REF
Max Load - Build Spec. (lb)
12.14
Max Load (lb)
12.14
Max Load (kg)
5.51
Max Load (gm)
5506.70
Max Extended Length - Build Spec. (in)
7.43
Max Extended Length (in)
7.43
Max Extended Length (mm)
188.65
Max Extended Length (cm)
18.87
Body Length - Build Spec. (in)
3.38
Body Length (in)
3.38
Body Length (mm)
85.78
Body Length (cm)
8.58
Loop Inside Diameter - Build Spec. (in)
0.28
Loop Inside Diameter (in)
0.28
Loop Inside Diameter (mm)
7.11
Loop Inside Diameter (cm)
0.71
Loop Position
Random
Loop Opening - Build Spec. (in)
0.05
Loop Opening (in)
0.05
Loop Opening (mm)
1.19
Loop Opening (cm)
0.12
Max Load (N)
54.00
Inside Diameter - Build Spec (in)
0.28
Model Code
LEM

Standard Extension Series (metric)

Selection to Match Your Needs

Lee Spring LEM120D 12 M is a precision extension spring from the Standard Extension Series (metric) series, engineered for applications requiring reliable quality extension springs. This spring features a 9.5-mm outside diameter (0.374 inch) with 7.11-mm loop inside diameter (0.28 inch) and extends from a free length of 100 mm (3.937 inch) to a maximum extended length of 188.65 mm (7.427 inch). Made from Music Wire with a 1.19-mm wire diameter (0.047 inch), the spring delivers a spring rate of 0.532 N/mm (3.04 lb/inch) through its 68.9 total coils with an initial tension of 6.85 N (1.54 lb) for predictable extension behavior. The spring supports a maximum load of 54.001 N (12.14 lb) at full extension with a body length of 85.78 mm (3.377 inch). The spring features Random loop position and Zinc Plate and Bake per ASTM B633 finish for optimal performance.

Extension Springs: Standard Series

The Lee Spring Standard Extension Spring Series includes a wide range of size and rate combinations and in both inch and metric sizes. Standard 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 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.

Lee Spring's Stock Extension Springs are supplied with full diameter loops (either to machine or crossover center style) at a random position with the exception of Metric Extension Springs which are specified to meet DIN Standards. Loop openings are approximately one wire diameter and the direction of wind is factory optional.

Standard 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

272221
Product Extension OD 0.374 in, Length 3.937 in, Music Wire
Product Extension OD 9.5 mm, Length 100 mm, Music Wire
Part Number LEM120D 12 M
Series Standard Extension Series (metric)
Outside Diameter (inch) 0.374
Outside Diameter (cm) 0.95
Outside Diameter (mm) 9.5
Wire Diameter (inch) 0.047
Wire Diameter (cm) 0.119
Wire Diameter (mm) 1.19
Max Load (gm) 5506.7
Max Load (lb) 12.14
Max Load (kg) 5.5067
Max Load (N) 54.001
Rate (gm/cm) 543
Rate (gm/mm) 54.3
Rate (kg/cm) 0.543
Rate (kg/mm) 0.0543
Rate (lb/in) 3.04
Rate (N/cm) 5.32
Rate (N/mm) 0.532
Max Extended Length (cm) 18.865
Max Extended Length (in) 7.427
Max Extended Length (mm) 188.65
Initial Tension (gm) 698.5
Initial Tension (kg) 0.6985
Initial Tension (lb) 1.54
Initial Tension (N) 6.85
Free Length (cm) 10
Free Length (inch) 3.937
Free Length (mm) 100
Material Music Wire
Loop Inside Diameter (cm) 0.711
Loop Inside Diameter (in) 0.28
Loop Inside Diameter (mm) 7.11
Ends Standard Loops
Loop Position Random
Direction of Wind Factory Option
Finish Zinc Plate and Bake per ASTM B633
0.047 0.374 0.01 3.937 0.06 68.9 1.54 0.308 3.04 0.304 7.427 12.14 0.047 3.377 Random 0.374 0.01 3.937 0.06 68.9 1.54 0.308 3.04 0.304 7.427 12.14
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Quantity Price
1 - 19 $9.570
20 - 49 $5.810
50 - 99 $3.100
100 - 199 $1.960
200 - 299 $1.727
300 - 399 $1.654
400 - 499 $1.591
500 - 599 $1.533
600 - 699 $1.481
700 - 799 $1.441
800 - 899 $1.405
900 - 999 $1.378
1000 $1.359

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