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Specifications

 

Download Spec Sheet

Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

LTR078N 04 M

Cost
$0.00
$0.00
Price
$0.00
Weight
0.03 lb.
Direction of Wind
Right Hand
Finish
Zinc Plate and Bake per ASTM B633
Material
Music Wire
Total Coils
7.000
Product Series
Published Stock Code
LTR078N04M
Product Type
Torsion Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
6.56
Rate (kg/cm)
0.07
Rate (lb/in)
0.06
Rate (gm/mm)
669.40
Weight per Item (lb)
0.03
Material Specification
ASTM A228
Inside Diameter (cm)
1.59
Inside Diameter (in)
0.63
Inside Diameter (mm)
15.88
Outside Diameter (cm)
1.984
Outside Diameter (in)
0.78
Outside Diameter (mm)
19.84
Outside Diameter - Build Spec (in)
0.78
Outside Diameter Tolerance (cm)
0.05
Outside Diameter Tolerance (in)
0.02
Outside Diameter Tolerance (mm)
0.51
Outside Diameter Tolerance - Build Spec (in)
0.02
Rate (gm/cm)
66.94
Rate (kg/mm)
0.67
Rate (N/cm)
0.66
Rate - Build Spec (lb/in)
0.06
Rate Tolerance (gm/cm)
0.00
Rate Tolerance (gm/mm)
0.00
Rate Tolerance (kg/cm)
0.00
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.00
Rate Tolerance (N/cm)
0.00
Rate Tolerance (N/mm)
0.00
Rate Tolerance - Build Spec (lb/in)
0.00
Total Coils - Build Spec
7.00
Wire Diameter (cm)
0.20
Wire Diameter (inch)
0.08
Wire Diameter (mm)
1.98
Wire Diameter - Build Spec (in)
0.08
Material Short Description
MW
Product Series
Torsion Springs
Inside Diameter Tolerance (cm)
Reference
Inside Diameter Tolerance (in)
Reference
Inside Diameter Tolerance (mm)
Reference
Inside Diameter Tolerance - Build Spec (in)
Reference
Body Length - Build Spec. (in)
0.64
Body Length (in)
0.64
Body Length (mm)
16.18
Body Length (cm)
1.62
Length of Leg (in)
2.00
Length of Leg - Build Spec. (in)
2.00
Length of Leg (mm)
50.80
Length of Leg (cm)
5.08
Length of Leg Tolerance - Build Spec. (in)
0.06
Length of Leg Tolerance (in)
0.06
Length of Leg Tolerance (mm)
1.52
Length of Leg Tolerance (cm)
0.152
Body Length Tolerance - Build Spec. (in)
Reference
Body Length Tolerance (in)
Reference
Body Length Tolerance (mm)
Reference
Body Length Tolerance (cm)
Reference
To Work Over Rod/Mandrel - Build Spec. (in)
0.50
To Work Over Rod/Mandrel (in)
0.50
To Work Over Rod/Mandrel (mm)
12.70
To Work Over Rod/Mandrel (cm)
1.27
To Work Over Rod/Mandrel Toler. - Build Spec. (in)
0
To Work Over Rod/Mandrel Tolerance (in)
0
To Work Over Rod/Mandrel Tolerance (mm)
0
To Work Over Rod/Mandrel Tolerance (cm)
0
Max Torque - Build Spec. (lb/in)
10.45
Max Torque (lb/in)
10.45
Max Torque (N/mm)
1180.69
Max Torque (N/cm)
118.07
Max Torque (kg/mm)
120.40
Max Torque (kg/cm)
12.04
Max Torque (gm/mm)
120399.00
Max Torque (gm/cm)
12039.90
Max Torque Tolerance - Build Spec. (lb/in)
1.05
Max Torque Tolerance (lb/in)
1.05
Max Torque Tolerance (N/mm)
118.07
Max Torque Tolerance (kg/mm)
12.04
Max Torque Tolerance (kg/cm)
1.20
Max Torque Tolerance (gm/mm)
12039.90
Max Torque Tolerance (gm/cm)
1203.99
Deflection to Max Torque
180.00
Deflection to Max Torque Tolerance
0
Radius - Build Spec. (in)
1.00
Radius (in)
1.00
Radius (mm)
25.40
Radius (cm)
2.54
Free Position of Ends
180.00
Free Position of Ends Tolerance
10.00
Max Torque Tolerance (N/cm)
11.80692
Inside Diameter - Build Spec (in)
0.63
Model Code
LTR

Torsion Spring: OD 0.781 in, 180 Degree, Right Hand Wind, Music Wire

Torsion Springs

Selection to Match Your Needs.

Lee Spring LTR078N 04 M is a precision torsion spring from the Torsion Springs, engineered for applications requiring reliable quality rotational force. This spring features a 0.781-inch outside diameter (19.84 mm) designed to work over a rod/mandrel of 0.5 inch (12.7 mm) with a 0.078 -inch wire diameter (1.98 mm). Made from this spring delivers a maximum torque of 10.45 lb-in (1180.69 N-mm) through its 7 total coils with a deflection to max torque of 180 degrees for predictable angular performance. The spring features legs with a length of 2 inch (50.8 mm) positioned at 180 degrees in the free position, operating at a radius of 1 inch (25.4 mm) with a body length of 0.64 inch (16.18 mm). This torsion spring has Zinc Plate and Bake per ASTM B633 and a Right Hand direction of wind and provides consistent rotational force for optimal performance in angular displacement applications.

About the Torsion Spring Series

Lee Spring's Torsion Springs have been carefully designed to represent the most commonly used specifications in both inch and metric sizes. Torsion Spring selection are available in seven categories based on the free position of legs (90°, 120°, 180°, 210°, 270°, 300°, 360°) and both left-hand and right-hand wound springs are available.

Direction of Wind:

Good design dictates that torsion springs should be used in the direction that winds the coil. When ordering, select either LTL (standard left-hand wound) or LTR (standard right-hand wound) for required application.

Mandrel Size:

Generally, torsion springs are used over a mandrel (shaft or arbor). The column "Suggested Mandrel Size", allows approximately a 10% clearance for the various deflections shown in examples below. If you require greater deflection, a reduction in mandrel size is suggested.

Torsion Springs Torsion 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

479971
Product Torsion OD 0.781 in, 180 Degree, Right Hand Wind,
Product Torsion OD 19.84 mm, 180 Degree, Right Hand Wind,
Part Number LTR078N 04 M
Series Torsion Springs
Outside Diameter (inch) 0.781
Outside Diameter (cm) 1.984
Outside Diameter (mm) 19.84
Wire Diameter (inch) 0.078
Wire Diameter (cm) 0.198
Wire Diameter (mm) 1.98
Max Torque (lb-in) 10.45
Max Torque (N-cm) 118.069
Max Torque (N-mm) 1180.69
Max Torque (kg-cm) 12.0399
Max Torque (kg-mm) 120.399
Max Torque (gm-cm) 12039.9
Max Torque (gm-mm) 120399
Deflection to Max Torque 180
Radius (cm) 2.54
Radius (in) 1
Radius (mm) 25.4
To Work Over Rod/Mandrel (cm) 1.27
To Work Over Rod/Mandrel (in) 0.5
To Work Over Rod/Mandrel (mm) 12.7
Free Position of Ends 180
Length of Leg (cm) 5.08
Length of Leg (in) 2
Length of Leg (mm) 50.8
Body Length (cm) 1.618
Body Length (in) 0.64
Body Length (mm) 16.18
Direction of Wind Right Hand
Total Coils 7
Material Music Wire
Finish Zinc Plate and Bake per ASTM B633
0.64 7 180 180 10 2 0.06 0.5 0.781 0.02 10.45 1.045 Right Hand 0.078
Default View
Side view
Top view
Quantity Price
1 - 19 $13.420
20 - 49 $8.400
50 - 99 $4.840
100 - 199 $3.200
200 - 299 $2.556
300 - 399 $2.332
400 - 499 $2.130
500 - 599 $1.949
600 - 699 $1.792
700 - 799 $1.654
800 - 899 $1.542
900 - 999 $1.451
1000 $1.384

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geographic requirements wherever your business
takes you in the world