I see what Your asking: The best I can say is to check with the manufacture, If You have a manufacture bulletin , they will talk about it. I have a 1/2 in. router that uses a reducer. to go to i/4 in. Could You be so blessed ? If You have a Colet in Your nut for the i/4 in., You may have a bushing that slips out. It would help us a lot if You would give us information on the router, And at the same time, if You could add a name, and a location in the profile page, We will have the information to give You mush needed help.
John 3:16 Please fill out your profile, It helps us to know you better