Looking for a clean way to run some wiring or piping? Amana Tool’s new ball end insert router bits cut a circular channel in the backside of moldings to hide the runs. Ball end bits aren’t new, but these bits are an extension of Amana’s line of bits with replaceable inserts.
These 1/2″ shank bits come in four different sizes, 1/2″, 5/8″, 3/4″, and 1″ diameter. The 1/2″ and 5/8″ bits use a single knife, while the 3/4″ and 1″ bits use two knives. To reduce stress on the ball end bit, Amana recommends that you remove most of the wood first using a straight bit that matches the ball end bit’s smallest cutting dimension.
The bits range in price from $40 to $57, depending on the size. The replacement cutters run $19 to $44. The two larger knives come in pairs, since the larger-sized bits use two.