local function set_drill_qualities()
    local drills = data.raw["mining-drill"]

    for name, drill in pairs(drills) do
        if not drill.quality then
            if name == "electric-mining-drill" then
                drill.quality = 1
            elseif name == "burner-mining-drill" then
                drill.quality = 0
            elseif name == "big-mining-drill" then
                drill.quality = 1
            else
                drill.quality = 1
            end
        end
    end
end

set_drill_qualities()