I saw a post that said the Nakahashi bits from Lee Valley were compatible with the Delta 14-651. Some of my original chisels were pretty blue, so I ordered a set. After sharpening, I noticed that the bit is much longer than the original set and does not seat deeply enough in the chuck to work with square mortiser - not even close - I would need to cut the bit. Is this expected? I do believe the chuck is open as far it can go, the bit fits in it, but only seats an inch to an inch and a half.

Am I missing something?

Thanks!