Hi & Welcome to the forum.
The Kress spindle is not really upto the task of any serious work, when i first started looking through the forum i was thinking perhaps an 1800W router would be OK but the more reading you do you will find even these are not suitable(very noisy & bearings would be US in no time with constant use, most go for the chinese water cooled spindles that give very little trouble.
Hope that helps
Mike