From Standard Handbook of Machine Design, 3rd Edition

Chapter 4: CAM MECHANISMS

Table 4.1: Standard Trigonometric Follower Motions
Table 4.2: Data of Rise Motion Used for Calculations of Return Portion of Cam Profile
Table 4.3: Data of First Half of Rise Motion Used for Calculations of Second Half
Table 4.4: Basic Equations for a Constant-Breadth Circular-Arc Cam, Using A = R 1 ? ?
Table 4.5: Weights Used in the Improved Finite-Difference Method

Chapter 5: GEAR TRAINS

Table 5.1: Solution by Tabulation
Table 5.2: Characteristic Equations for 12 Planetary Trains of Fig. 5.7
Table 5.3: Solution of Type A Train
Table 5.4: Solution of Type I Train

Chapter 6: SPRINGS

Table 6.1: Typical Properties of Common Spring Materials
Table 6.2: Typical Heat Treatments for Springs after Forming
Table 6.3: Ranking of Relative Costs of Common Spring Wires
Table 6.4: Formability of Annealed Spring Steels
Table 6.5: Typical Properties of Spring-Tempered Alloy Strip
Table 6.6: Maximum Allowable Torsional Stresses for Helical Compression Springs in Static Applications
Table 6.7: Maximum Allowable Torsional Stress for Round-Wire Helical Compression Springs in Cyclic Applications
Table 6.8: Free-Length Tolerances of Squared and Ground Helical Compression Springs
Table 6.9: Coil Diameter Tolerances of Helical Compression and Extension Springs
Table 6.10: Load Tolerances of Helical Compression Springs
Table 6.11: Maximum Allowable Stresses ( Corrected) for Helical Extension Springs in Static Applications
Table 6.12: Maximum Allowable Stresses for ASTM A228 and Type 302 Stainless-Steel Helical Extension Springs in Cyclic Applications
Table 6.13: Commercial Free-Length Tolerances for Helical Extension Springs with Initial Tension
Table 6.14: Tolerances on...
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Products & Services
Compression Springs

Compression springs are the most recognizable of spring and are intended to oppose compaction in the direction of the axis. The spring is extended at rest, shorten and store energy when a load is applied, and is one most efficient energy storage devices available. Traditionally, they are wound and uniform in pitch and diameter, but these traits vary considerably today.

Extension Springs

Helically wound to oppose resistant forces, extension springs have consistent mechanical energy to return to its no-load, compressed position. The ends of the spring are attached to components intended to move apart, with the extension spring providing a reliable return force.

Die Springs
Die springs are a robust type of helical compression springs consisting of rectangular wire. For the same value deflection, die springs carry 30% more load. These springs are designed to carry very high compression loads in hostile environments. Made mainly for punch press to provide consistent and reliable resistance, die springs also find use in other industries.
Spring Washers
Spring washers, sometimes called disc springs, lend their mechanical capabilities to the unique profile of the material: the irregularities of the washer compress with a proportionate resistance to return to their predeflected shape. Spring washers are employed in applications where assemblies need a part to take up play, maintain assembly tension, compensate for expansion or contraction in materials, or to absorb intermittent shock loads and provide a controlled reaction under dynamic loads.

Topics of Interest

Many small mechanisms contain a spring or two. The input window for a beam spring shows the range of selections. It's useful to have the input matrix on screen when filling in the blanks. The input...

Most mechanical-drive systems use springs and parts such as retaining clips and spring washers. Although relatively small and inexpensive, these components are often critical to the reliable...

7.1 INTRODUCTION TO SPRING DESIGN Springs are among the most important and most often used mechanical components. Many mechanisms and assemblies would be virtually impossible to design and...

OVERVIEW Springs and die springs are important mechanical components used in countless mechanisms, mechanical systems, and tooling applications. This chapter contains data and calculation procedures...

6.7 Materials for Springs Springs come in many shapes (Figure 6.11 and Table 6.11) and have many purposes: think of axial springs (e.g. a rubber band), leaf springs, helical springs, spiral springs,...