If it hits the sand and salt bobfish is right, this will screw it up. However, you also must remember that smaller reels don't have anywhere near the line capacity of a beach rod, so say you have 80 metres of line on ur reel, you cast out 60 metres, a big salmon, tailor or jew hits then ping! He'll get off in no time. I had a big salmon strip line of my Alvey, it went about 85 cm. Tailor off the beach can get relatively big, so They can mess up your reel. A fast fish on a small rod: I woulod never try it.
If you are chasing whiting and bream, it should be Ok but Salmon and jews love the beach worms, so watch out for any tell tale signs they are around!
Henners