The working head moving device adopted in the working apparatus for machining workpiece supported by the work setting section having the underside-abutting portion and the side-abutting portion can maintain proper machining conditions with adaptability to decrease in size of workpiece entailed by proceeding of machining, can perform machining on workpiece with high uniformity and precision, and can move the working head without causing damage to workpiece. There is provided the head moving system for moving the working head between the working-state position and the retracted-state position, and the head moving system has the trunnion support portion which allows the working head to rock about its oscillation axis perpendicular to the rotation axis of the rotary tool when the working head is pressed against workpiece in conformity with decrease of workpiece size entailed by proceeding of machining, thereby maintaining the angle of intersection of workpiece-contacted surface and the rotation axis invariant.

The working head moving device adopted in the working apparatus for machining workpiece supported by the work setting section having the underside-abutting portion and the side-abutting portion can maintain proper machining conditions with adaptability to decrease in size of workpiece entailed by proceeding of machining, can perform machining on workpiece with high uniformity and precision, and can move the working head without causing damage to workpiece. There is provided the head moving system for moving the working head between the working-state position and the retracted-state position, and the head moving system has the trunnion support portion which allows the working head to rock about its oscillation axis perpendicular to the rotation axis of the rotary tool when the working head is pressed against workpiece in conformity with decrease of workpiece size entailed by proceeding of machining, thereby maintaining the angle of intersection of workpiece-contacted surface and the rotation axis invariant.

A device for restoring the surface of used lacrosse balls. Lacrosse balls are placed inside a chamber that is lined with an abrasive surface. The device can be placed within a typical clothes dryer machine and during the course of a normal drying cycle the surface of the lacrosse balls are restored to a desired characteristic tactile grip. The exterior of the device is cushioned to dampen impact with the inner surface of the clothes dryer and minimize the generation of noise during use.

A device for restoring the surface of used lacrosse balls. Lacrosse balls are placed inside a chamber that is lined with an abrasive surface. The device can be placed within a typical clothes dryer machine and during the course of a normal drying cycle the surface of the lacrosse balls are restored to a desired characteristic tactile grip. The exterior of the device is cushioned to dampen impact with the inner surface of the clothes dryer and minimize the generation of noise during use.

An apparatus for imparting compressive residual stress to at least a surface portion of a first plurality of balls includes a first body having a first surface, the first surface including a smooth contact portion, the smooth contact portion being substantially flat or convex and having a surface hardness greater than or equal to the initial surface hardness of the balls. The apparatus also includes a second body having a second surface, the first surface overlying the second surface, and at least one drive operably connected to the first body or to the second body and configured to move one of the first and second bodies relative to the other body at a substantially fixed distance, the at least one drive also being configured to move the first body toward the second body with a force or to move the second body toward the first body with the force.

A device for restoring the surface of used lacrosse balls. Lacrosse balls are placed inside a chamber that is lined with an abrasive surface. The device can be placed within a typical clothes dryer machine and during the course of a normal drying cycle the surface of the lacrosse balls are restored to a desired characteristic tactile grip. The exterior of the device is cushioned to dampen impact with the inner surface of the clothes dryer and minimize the generation of noise during use.

A device for restoring the surface of used lacrosse balls. Lacrosse balls are placed inside a chamber that is lined with an abrasive surface. The device can be placed within a typical clothes dryer machine and during the course of a normal drying cycle the surface of the lacrosse balls are restored to a desired characteristic tactile grip. The exterior of the device is cushioned to dampen impact with the inner surface of the clothes dryer and minimize the generation of noise during use.

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 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.