Originally Posted by bob a job  But the cutter gets hot and makes the bearing in my router hot. |
Are you sure it's not the bearings getting hot and making the cutter hot? Run the router for a little while without cutting to check. You may need new bearings in the router.
If it is the cutter getting hot, the only thing you can do is lower the rpm's and/or move faster. But cutting creates a lot of heat, and there's not a lot you can do about it. Using a bit cleaner to keep the bit clean can help. Or if possible, blow compressed air on it while cutting.