Compression spring LM45 series

coiledwaveflat wire

Custom High Precision Stainless Steel Serpentine Square Wire Wave Spring Wave Disc Spring

Description:

• Multi turn wave springs, also known as coiled wave springs or scrowave springs, are made from pre-hardened flat wire using on-edge coiling (edge-winding). Waves are added to produce a spring effect.
• Multi turn wave springs (multi-wave compression springs) provide larger deflections than round wire springs while occupying less axial space.
• Flat wire compression (wave) springs offer significant space savings compared with coil springs when used as replacements.

Multi turn wave springs may be manufactured in different configurations: peak (tandem) types for large displacement with medium/low spring force (force inversely proportional to number of turns), and nested (parallel) types for higher force (force proportional to number of turns). They are produced by a continuous winding process rather than by simple stacking of single-turn wave elements.

Compared with conventional round wire coil springs, multi turn wave springs have much lower free and working heights. For equivalent spring force they can save up to 50% of installation space and up to 70% of spring weight. The product described here is made from 17-7PH stainless steel, offering high tensile strength, fatigue resistance, good high-stress performance versus carbon steel, passivated corrosion resistance, bright appearance, and usable up to about 200°C.

Features of multi turn wave springs

• Suitable for applications with large stroke and relatively small load.
• Save approximately half the axial space compared with conventional helical compression springs for similar loads.
• Reduce overall equipment volume and save costs.
• Ideal where axial space is limited.
• Different load requirements can be met by changing strip thickness/width or stacking two or three overlapping wave springs.

Materials

• Stainless steel (including 17-7PH)
• Inconel (nickel-chromium alloys for high temperature/corrosive environments)
• Titanium (lightweight, strong, corrosion resistant)
• Phosphor bronze (good spring properties, corrosion resistance)
• Beryllium copper (high spring properties, corrosion resistance)

Life

Service life depends mainly on compression amount and stress ratio during use. At minimum working height the normal service life is around 10,000 cycles. Reducing compression by more than 50% can theoretically increase life to about 1,000,000 cycles.

Application

Multi turn wave springs compensate for assembly dimensional changes while carrying load. They provide a precise spring constant (load proportional to deflection) and require very little operational space. Typical uses: aerospace, precision machinery, hydraulic sealing, high-end motors, pressure relief valves, surface seals, slip clutches, bearings, fluid valves, axial piston pumps, clutches, vibration isolation, preload positioning and other devices.

How to prevent corrosion of multi turn wave springs

• Spraying/painting coatings (painting, dipping, electrostatic spraying) to provide protective layers for larger springs.
• Oxidation (blue/black) treatments produce thin protective films suitable only for low-corrosive environments.
• Electroplating to form uniform protective metallic layers with good adhesion and physical/chemical properties.

Specification (table)
Part No. | Operates in Bore Diameter (mm) | Shaft Diameter (mm) | Load (N) | Work Height (mm) | Free Height (mm) | Waves | Turns | Thickness (mm) | Radial Wall (mm) | Spring Rate (N/MM)
LM45-H1 | 45 | 35 | 400 | 6.43 | 9.91 | 4.5 | 3 | 0.61 | 3.76 | 114.94
LM45-L1 | 45 | 35 | 110 | 3.38 | 9.91 | 3.5 | 3 | 0.46 | 3.63 | 16.85
LM45-M1 | 45 | 35 | 225 | 5.33 | 9.91 | 4.5 | 3 | 0.46 | 3.63 | 49.13
LM45-H2 | 45 | 35 | 400 | 8.38 | 13.21 | 4.5 | 4 | 0.61 | 3.76 | 82.82
LM45-L2 | 45 | 35 | 110 | 4.52 | 13.21 | 3.5 | 4 | 0.46 | 3.63 | 12.66
LM45-M2 | 45 | 35 | 225 | 6.99 | 13.21 | 4.5 | 4 | 0.46 | 3.63 | 36.17
LM45-H3 | 45 | 35 | 400 | 11.2 | 16.51 | 4.5 | 5 | 0.61 | 3.76 | 75.33
LM45-L3 | 45 | 35 | 110 | 5.64 | 16.51 | 3.5 | 5 | 0.46 | 3.63 | 10.12
LM45-M3 | 45 | 35 | 225 | 9.14 | 16.51 | 4.5 | 5 | 0.46 | 3.63 | 30.53
LM45-H4 | 45 | 35 | 400 | 12.95 | 19.81 | 4.5 | 6 | 0.61 | 3.76 | 58.31
LM45-L4 | 45 | 35 | 110 | 6.76 | 19.81 | 3.5 | 6 | 0.46 | 3.63 | 8.43
LM45-M4 | 45 | 35 | 225 | 10.8 | 19.81 | 4.5 | 6 | 0.46 | 3.63 | 24.97
LM45-H5 | 45 | 35 | 400 | 15.37 | 23.11 | 4.5 | 7 | 0.61 | 3.76 | 51.68
LM45-L5 | 45 | 35 | 110 | 7.9 | 23.11 | 3.5 | 7 | 0.46 | 3.63 | 7.23
LM45-M5 | 45 | 35 | 225 | 12.7 | 23.11 | 4.5 | 7 | 0.46 | 3.63 | (data not provided)

Caractéristiques / spécifications techniques

• SKU: a942aeaedde8
• Product name: Multi Turn Wave Springs
• Material example: 17-7PH stainless steel (high tensile strength, fatigue resistance)
• Maximum recommended working temperature: up to approximately 200°C (material-dependent)
• Manufacturing: made from pre-hardened flat strip using edge-winding (on-edge coiling) with waves added
• Space saving: can reduce component axial space by up to ~50% and spring weight by up to ~70% compared with round wire coil springs for equivalent force
• Typical service life: ~10,000 cycles at minimum working height; can be increased significantly (theoretically to ~1,000,000 cycles) by reducing compression magnitude
• Typical applications: aerospace, precision machinery, hydraulic sealing, high-end motors, valves, clutches, bearings, pumps, vibration isolation and preload positioning
• Available materials: stainless steel, Inconel, titanium, phosphor bronze, beryllium copper