I am working on a project where we need to field drill slotted holes in a rubber gate seal. The rubber has a durometer harness of 60 to 70. Currently, round holes exist in the rubber seal which are used for retaining to the structure. In order for fit up, we need to slot the holes by approximately 2 to 4mm. Our thoughts are to use soapy water on both the rubber and drill bit and use a die grinder to elongate the holes.
Does anyone have any recommendations for how best to field drill the rubber?
Thanks in advance.
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