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Use the reamer on these parts only after you have pressed them into the other parts FIRST. (See the Assembly Instructions).

1.) Use a 0.251" reamer and ream the bearings by putting the reamer in the cordless drill. (DO NOT use the reamer in the drill press).

NOTE: These parts are bought from a vendor in mass quantity at low cost. The benefit is the low cost. The draw back is the low quality. The shafts must move freely in the bearings for the clock escapement to work. Please check the reamer size. The 0.249" and 0.251" look the same.