Custom made soft carbon pucks for silicone keypads

Custom carbon pucks for silicone keypads form contact elements within the intended button assembly. Their dimensions and placement need to correspond to the circuit contact and the movement of the molded key. A puck should be developed as part of that interface rather than selected solely by its visible diameter.

Check the available area beneath the button and the position reached during a press. The contact element needs to remain aligned through the intended movement, including a touch away from the face center. The surrounding rubber and housing support influence that movement.

Evaluate the complete keypad and circuit arrangement after assembly. The carbon element alone does not establish a contact rating or operating life for the finished control. Keep the contacting surfaces free of particles and handling residue during fitting. Use the intended manufacturing and retention arrangement rather than adding an improvised fixing method. If servicing affects the contact region, restore the specified geometry and check every relevant control before returning the device to use.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. The contact element needs to remain aligned through the intended movement, including a touch away from the face center.

Custom dimensions

A puck should be developed as part of that interface rather than selected solely by its visible diameter.

Fit & assembly

Check the available area beneath the button and the position reached during a press.

Use & inspection

If servicing affects the contact region, restore the specified geometry and check every relevant control before returning the device to use.

Photos illustrate structure or material only. The contact element needs to remain aligned through the intended movement, including a touch away from the face center. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.