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Silicone Rubber Keypads - Dimensions

Silicone Rubber Keypads Dimensions

Silicone Rubber Keypads dimensions: keytop side radius and button base width and radius
  • 1 - Typical outside radius 1.0mm to 1.5mm
  • 2 - Minimum radius 0.3mm
  • 3 - Minimum inside radius 0.2mm
  • 4 - Minimum spacing between the edges of a rubber dome and guide hole 1.0mm
  • 5 - Guide holes minimum 1.0mm diameter
  • 6 - Width of rubber button base typically 2.0mm greater than 'a'
  • 7 - Minimum radius for the side of the keytop 0.25mm
  • 8 - Minimum radius for the top edges of the keytop 0.2mm
Silicone Rubber Keypads dimensions: key spacing and guide holes

Key Height

Silicone Rubber Keypads dimensions: key height
  • H = Dimensions from keytop to front panel
  • S = Key stroke
  • H-S > 1.5mm

Key Corner Radius

Silicone Rubber Keypads dimensions: key corner radius
  • R = Corner radius of cut-out
  • r = Corner radius of rubber
  • 1.0mm < R < 1.25mm
  • 0.75mm < r < 1.0mm

Key Clearance

Silicone Rubber Keypads dimensions: key clearance
  • A & B = Dimensions of front panel cut-out
  • a & b = Dimensions of rubber
  • A-a > 0.4mm
  • B-b = 0.3mm

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