A ball magazine for a device for lapping and/or grinding balls includes a ball removal section configured to be connected to the device and receive balls from the device, a ball storage section connected to the ball removal section and configured to receive the balls from the ball removal section, and a ball feed section configured to guide the balls from the ball storage section back to the device. At least part of the ball storage section, which may be formed as a channel, is sloped.

A ball guiding device configured for use with an apparatus for lapping and/or grinding balls that includes a first disc and a second disc with first and second continuous grooves separated by a wall. The ball guiding device includes a body having a guide groove with a first end insertable into the first continuous groove and a second end insertable into the second continuous groove and a raised central portion configured to overly the first wall. The guide groove including a first ramp extending from the first end to the raised central configured to guide the balls out of the first continuous groove and a second ramp extending from the raised central portion to the second end configured to guide the balls into the second continuous groove.

A ball guiding device configured for use with an apparatus for lapping and/or grinding balls that includes a first disc and a second disc with first and second continuous grooves separated by a wall. The ball guiding device includes a body having a guide groove with a first end insertable into the first continuous groove and a second end insertable into the second continuous groove and a raised central portion configured to overly the first wall. The guide groove including a first ramp extending from the first end to the raised central configured to guide the balls out of the first continuous groove and a second ramp extending from the raised central portion to the second end configured to guide the balls into the second continuous groove.