Spiral Spring Gasket

Spiral Spring Gasket

  • Spiral-Spring-Gasket
  • Spiral-Spring-Gasket-with-Silicone-Core
  • Spiral-Spring-Gasket-with-Silicone

Overview

  • Spiral EMI gasket is an ideal shielding material used for sensitive equipment requiring high electromagnetic shielding performance thanks to its excellent electromagnetic shielding effect.
     -Suitable for semiconductor manufacturing equipment, precision medical equipment, communication equipment, military equipment, satellite equipment, etc.
  • High elasticity Sn plated BeCu or stainless steel sheet is spiraled to provide excellent elasticity, flexibility and high shielding effectiveness.

Features

  • RoHS Compliant
  • Superior EMI shielding effectiveness over 100 dB
  • It can be cut in the longitudinal direction and can be easily inserted into the groove in a circular shape (Groove Mounting)
  • Hardness can be adjusted according to material thickness and spiral pitch of gaskets.
  • Various spiral pitch, diameter, thickness, and materials are available.
  • Spiral plates with low elasticity are susceptible to pressure, but by using a silicone tube or silicone cord as inner core material, damage from excessive compression can be prevented.

Details

Material

Contents Silicone Sponge Silicone Rubber Tube Test Method
Core Color White Translucent -
Specific Gravity (g/cm3) 1.16 1.16 JIS K 6220
Hardness (JIS A) 53 61 JIS K 6253
Tensile Strength 91Kgf/㎠ 104Kgf/㎠ JIS K 6251
Elongation 320% 365% JIS K 6251
Metal Spring Material Sn plated BeCu #C17200 / Stainless steel #304H


Specifications

Spiral-Gasket-Structure

Item Unit SBT-024W SBN-024W SSN-024W Test Method
Size Outer Diameter (A) mm 0.24±0.1 ESQ-612-23
Thickness (B) mm 0.08±0.004 ESQ-612-23
Pitch (C) mm 5±0.4 ESQ-612-23
Standard Length M/Roll 30 ESQ-612-23
Vertical Resistance Ω < 0.1 ESQ-612-02
Compression Recovery Rate
(25%, 150℃X100hr)
% > 90 ESQ-612-18
Repulsive Force (25%) Kgf/in. 8.0±15% 7.5±15% 10.0±15% ESQ-612-27
Environment Friendly RoHS compliant -


Groove Mount

Spiral-Gasket-Groove-Mount


  • Recommended Grove Size
Outer Diameter[mm] Recommended Groove Size[mm]
Depth WB WT
0.90±0.10 0.68 1.10 0.86~0.87
1.60±0.10 1.20 1.95 1.52~1.55
2.40±0.10 1.80 2.93 2.28~2.33
2.80±0.10 2.10 3.42 2.66~2.72
3.00±0.10 2.25 3.67 2.85~2.91
3.20±0.10 2.40 3.91 3.04~3.10
3.60±0.12 2.70 4.40 3.42~3.49
4.30±0.12 3.23 5.25 4.09~4.17
4.70±0.15 3.53 5.74 4.47~4.56
5.00±0.15 3.75 6.11 4.75~4.85
5.30±0.15 3.98 6.48 5.04~5.14
5.50±0.15 4.13 6.72 5.23~5.34
6.40±0.17 4.80 7.82 6.08~6.21
6.80±0.17 5.10 8.31 6.46~6.60
10.0±0.20 7.50 12.22 9.50~9.70


Test Results

[Shielding Effectiveness]
Graph-Spiral-Gasket-Shielding-Effectiveness
  • Advantest Test [MIL STD-83528C Equivalent]
  • Sample#: SBT-044W
  • Sample Spec.: D4.4mm, Sn plated BeCu
[Compression Resistance]
Graph-Spiral-Gasket-Compression-Resistance
  • Test Spec.: ESQ-517-27 (Self-specification)
  • Recommended compression rate: 25%
  • Sample#: SSN-064W (3pins)

Applications

It is mainly used in precision equipment sensitive to electromagnetic waves such as semiconductor manufacturing equipment, display production equipment, and communication equipment.

  • Spiral-Spring-Gasket-in-Groove
  • Spiral-Spring-Gasket-in-Shielding-Case
  • Spiral-Spring-Gasket-with-Silicone-Seal

Product Support

Product Number

Spiral_Spring_Gasket
Number Code Example
(1) Product Code S (Spiral Spring Gasket)
(2) Metal Material BT: Sn plated BeCu
BG: Au plated BeCu
BN: Ni plated BeCu
B: BeCu
SN: Stainless Steel
(3) Outer Diameter 009: 0.9mm
(4) Core Material W: Coreless
T: Silicone rubber tube
F: Silicone sponge
A: Silicone rubber cord