Standard Extension Series (inch).

Selection to Match Your Needs

Lee Spring LE 018A 03 M:

Lee Spring LE 018A 03 M is a precision extension spring from the Standard Extension Series (inch), engineered for applications requiring reliable quality extension springs. This spring features a 0.125-inch outside diameter (3.18 mm) with 0.089-inch loop inside diameter (2.26 mm) and extends from a free length of 1.25 inch (31.75 mm) to a maximum extended length of 2.11 inch (53.59 mm).

Made from Music Wire with a 0.018-inch wire diameter (0.46 mm), the spring delivers a spring rate of 2.2 lb/inch (0.385 N/mm) through its 58.4 total coils with an initial tension of 0.3 lb (1.334 N). The spring supports a maximum load of 2.2 lb (9.786 N) at full extension with a body length of 1.072 inch (27.23 mm). The spring features Random loop position and Zinc Plate and Bake per ASTM B633 finish for optimal performance.

Lee Spring LE 024B 11 M:

Lee Spring LE 024B 11 M is a precision extension spring from the Standard Extension Series (inch), engineered for applications requiring reliable quality extension springs. This spring features a 0.188-inch outside diameter (4.78 mm) with 0.14-inch loop inside diameter (3.56 mm) and extends from a free length of 1.5 inch (38.1 mm) to a maximum extended length of 2.8 inch (71.12 mm).

Made from Music Wire with a 0.024-inch wire diameter (0.61 mm), the spring delivers a spring rate of 2.3 lb/inch (0.403 N/mm) through its 49.1 total coils with an initial tension of 0.4 lb (1.779 N). The spring supports a maximum load of 3.4 lb (15.124 N) at full extension with a body length of 1.22 inch (30.99 mm). The spring features Random loop position and Zinc Plate and Bake per ASTM B633 finish for optimal performance.

Lee Spring LE 041D 02 M:

Lee Spring LE 041D 02 M is a precision extension spring from the Standard Extension Series (inch), engineered for applications requiring reliable quality extension springs. This spring features a 0.375-inch outside diameter (9.53 mm) with 0.293-inch loop inside diameter (7.44 mm) and extends from a free length of 1.125 inch (28.58 mm) to a maximum extended length of 1.855 inch (47.12 mm).

Made from Music Wire with a 0.041-inch wire diameter (1.04 mm), the spring delivers a spring rate of 9.5 lb/inch (1.664 N/mm) through its 12 total coils with an initial tension of 0.9 lb (4.003 N). The spring supports a maximum load of 7.8 lb (34.696 N) at full extension with a body length of 0.539 inch (13.69 mm). The spring features Random loop position and Zinc Plate and Bake per ASTM B633 finish for optimal performance.

Lee Spring LE 105J 02 S:

Lee Spring LE 105J 02 S is a precision extension spring from the Standard Extension Series (inch), engineered for applications requiring reliable quality extension springs. This spring features a 1-inch outside diameter (25.4 mm) with 0.79-inch loop inside diameter (20.07 mm) and extends from a free length of 3 inch (76.2 mm) to a maximum extended length of 4.85 inch (123.19 mm).

Made from Stainless Steel with a 0.105-inch wire diameter (2.67 mm), the spring delivers a spring rate of 16.24 lb/inch (2.844 N/mm) through its 13.1 total coils with an initial tension of 3.332 lb (14.821 N). The spring supports a maximum load of 33.32 lb (148.215 N) at full extension with a body length of 1.42 inch (36.07 mm). The spring features Random loop position and Passivate per ASTM A967 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 (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

Specifications.

Part Number	LE 018A 03 M	LE 024B 11 M	LE 041D 02 M	LE 105J 02 S
Product	Extension OD 0.125 in, Length 1.25 in, Music Wire	Extension OD 0.188 in, Length 1.5 in, Music Wire	Extension OD 0.375 in, Length 1.125 in, Music Wire	Extension OD 1 in, Length 3 in, Stainless Steel
Series	Standard Extension Series (inch)
Outside Diameter (inch)	0.125	0.188	0.375	1
Wire Diameter (inch)	0.018	0.024	0.041	0.105
Max Load (lb)	2.2	3.4	7.8	33.32
Rate (lb/in)	2.2	2.3	9.5	16.24
Max Extended Length (in)	2.11	2.8	1.855	4.85
Initial Tension (lb)	0.3	0.4	0.9	3.332
Free Length (inch)	1.25	1.5	1.125	3
Material	Music Wire			Stainless Steel
Loop Inside Diameter (in)	0.089	0.14	0.293	0.79
Ends	Standard Loops
Loop Position	Random
Direction of Wind	Factory Option
Finish	Zinc Plate and Bake per ASTM B633			Passivate per ASTM A967