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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

LEM075CD 03 M

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
30.300
Published Stock Code
LEM075CD03M
Product Type
Extension Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.30
Rate (kg/cm)
0.31
Rate (lb/in)
1.73
Rate (gm/mm)
30.90
Weight per Item (lb)
0.01
Material Specification
ASTM A228
Free Length (cm)
3.500
Free Length (inch)
1.378
Free Length (mm)
35.000
Free Length - Build Spec (in)
1.38
Free Length Tolerance (cm)
0.09
Free Length Tolerance (in)
0.04
Free Length Tolerance (mm)
0.89
Free Length Tolerance - Build Spec (in)
0.04
Inside Diameter (cm)
0.65
Inside Diameter (in)
0.26
Inside Diameter (mm)
6.53
Outside Diameter (cm)
0.800
Outside Diameter (in)
0.32
Outside Diameter (mm)
8.00
Outside Diameter - Build Spec (in)
0.32
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)
309.00
Rate (kg/mm)
0.03
Rate (N/cm)
3.03
Rate - Build Spec (lb/in)
1.73
Rate Tolerance (gm/cm)
30.90
Rate Tolerance (gm/mm)
3.09
Rate Tolerance (kg/cm)
0.03
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.17
Rate Tolerance (N/cm)
0.30
Rate Tolerance (N/mm)
0.03
Rate Tolerance - Build Spec (lb/in)
0.17
Total Coils - Build Spec
30.34
Wire Diameter (cm)
0.07
Wire Diameter (inch)
0.03
Wire Diameter (mm)
0.74
Wire Diameter - Build Spec (in)
0.03
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)
0.37
Initial Tension (lb)
0.37
Initial Tension (N)
1.65
Initial Tension (kg)
0.17
Initial Tension (gm)
167.80
Initial Tension Tolerance - Build Spec. (lb)
0.07
Initial Tension Tolerance (lb)
0.07
Initial Tension Tolerance (N)
0.33
Initial Tension Tolerance (kg)
0.03
Initial Tension Tolerance (gm)
33.57
Inside Diameter Tolerance - Build Spec (in)
REF
Max Load - Build Spec. (lb)
3.75
Max Load (lb)
3.75
Max Load (kg)
1.70
Max Load (gm)
1701.00
Max Extended Length - Build Spec. (in)
3.33
Max Extended Length (in)
3.33
Max Extended Length (mm)
84.53
Max Extended Length (cm)
8.45
Body Length - Build Spec. (in)
0.87
Body Length (in)
0.87
Body Length (mm)
22.05
Body Length (cm)
2.21
Loop Inside Diameter - Build Spec. (in)
0.26
Loop Inside Diameter (in)
0.26
Loop Inside Diameter (mm)
6.48
Loop Inside Diameter (cm)
0.65
Loop Position
Random
Loop Opening - Build Spec. (in)
0.03
Loop Opening (in)
0.03
Loop Opening (mm)
0.74
Loop Opening (cm)
0.07
Max Load (N)
16.68
Inside Diameter - Build Spec (in)
0.26
Model Code
LEM

Standard Extension Series (metric)

Selection to Match Your Needs

Lee Spring LEM075CD 03 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 8-mm outside diameter (0.315 inch) with 6.48-mm loop inside diameter (0.255 inch) and extends from a free length of 35 mm (1.378 inch) to a maximum extended length of 84.53 mm (3.328 inch). Made from Music Wire with a 0.74-mm wire diameter (0.029 inch), the spring delivers a spring rate of 0.303 N/mm (1.73 lb/inch) through its 30.3 total coils with an initial tension of 1.646 N (0.37 lb) for predictable extension behavior. The spring supports a maximum load of 16.681 N (3.75 lb) at full extension with a body length of 22.05 mm (0.868 inch). The spring features Random loop position and Pre-coated with Tin 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

270181
Product Extension OD 0.315 in, Length 1.378 in, Music Wire
Product Extension OD 8 mm, Length 35 mm, Music Wire
Part Number LEM075CD 03 M
Series Standard Extension Series (metric)
Outside Diameter (inch) 0.315
Outside Diameter (cm) 0.8
Outside Diameter (mm) 8
Wire Diameter (inch) 0.029
Wire Diameter (cm) 0.074
Wire Diameter (mm) 0.74
Max Load (gm) 1701
Max Load (lb) 3.75
Max Load (kg) 1.701
Max Load (N) 16.681
Rate (gm/cm) 309
Rate (gm/mm) 30.9
Rate (kg/cm) 0.309
Rate (kg/mm) 0.0309
Rate (lb/in) 1.73
Rate (N/cm) 3.03
Rate (N/mm) 0.303
Max Extended Length (cm) 8.453
Max Extended Length (in) 3.328
Max Extended Length (mm) 84.53
Initial Tension (gm) 167.8
Initial Tension (kg) 0.1678
Initial Tension (lb) 0.37
Initial Tension (N) 1.646
Free Length (cm) 3.5
Free Length (inch) 1.378
Free Length (mm) 35
Material Music Wire
Loop Inside Diameter (cm) 0.648
Loop Inside Diameter (in) 0.255
Loop Inside Diameter (mm) 6.48
Ends Standard Loops
Loop Position Random
Direction of Wind Factory Option
Finish Pre-coated with Tin
0.029 0.315 0.01 1.378 0.035 30.3 0.37 0.074 1.73 0.173 3.328 3.75 0.029 0.868 Random 0.315 0.01 1.378 0.035 30.3 0.37 0.074 1.73 0.173 3.328 3.75
Default View
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Quantity Price
1 - 19 $8.310
20 - 49 $5.040
50 - 99 $2.610
100 - 199 $1.590
200 - 299 $1.323
300 - 399 $1.231
400 - 499 $1.148
500 - 599 $1.077
600 - 699 $1.012
700 - 799 $0.954
800 - 899 $0.912
900 - 999 $0.873
1000 $0.844

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