A sharpening device for sharpening and grinding mower blades. The sharpening device includes a roller table and a plurality of mower blade mounting platforms that slide back and forth atop a base. The mower blade mounting platforms include an electromagnet that secures a mower blade to a support surface and guides for directing the position of the secured mower blade. The sharpening device further includes a plurality of sharpening members, such as grindstones, that engage with the mower blades secured to the mower blade mounting platforms. Each mower blade mounting platform includes adjustment mechanisms that allow a user to alter the lateral position of the blade and the sharpening angle of the blade. A first and second motor causes the mower blade mounting platforms to reciprocate and the sharpening members to rotate.

A sharpening device for sharpening and grinding mower blades. The sharpening device includes a roller table and a plurality of mower blade mounting platforms that slide back and forth atop a base. The mower blade mounting platforms include an electromagnet that secures a mower blade to a support surface and guides for directing the position of the secured mower blade. The sharpening device further includes a plurality of sharpening members, such as grindstones, that engage with the mower blades secured to the mower blade mounting platforms. Each mower blade mounting platform includes adjustment mechanisms that allow a user to alter the lateral position of the blade and the sharpening angle of the blade. A first and second motor causes the mower blade mounting platforms to reciprocate and the sharpening members to rotate.

A mower reel grinding apparatus including at least one bracket moveable in a horizontal plane along a positioning axis to any one of a number of predetermined positions and configured to releasably secure to a pivot mechanism of a plurality of types of mower units, the pivot mechanism having a pivot axis, each type of mower unit including a cutting reel positioned at a known location relative to the pivot axis, and each of the predetermined positions corresponding to at least one type of mower unit of the plurality of types of mower units, wherein the at least one bracket is moved to the predetermined position corresponding to the type of mower unit secured thereto such that the cutting reel is positioned at a desired grinding position along the positioning axis when the pivot axis is secured to the bracket.

A mower reel grinding apparatus including at least one bracket moveable in a horizontal plane along a positioning axis to any one of a number of predetermined positions and configured to releasably secure to a pivot mechanism of a plurality of types of mower units, the pivot mechanism having a pivot axis, each type of mower unit including a cutting reel positioned at a known location relative to the pivot axis, and each of the predetermined positions corresponding to at least one type of mower unit of the plurality of types of mower units, wherein the at least one bracket is moved to the predetermined position corresponding to the type of mower unit secured thereto such that the cutting reel is positioned at a desired grinding position along the positioning axis when the pivot axis is secured to the bracket.

A mower reel grinding system a plurality of mower unit types, including a grinding wheel shaft, the grinding wheel shaft at a fixed position in an x-y plane. A mounting plate includes a number of predetermined fixed mounting positions on the mounting plate, each predetermined fixed mounting positions corresponding to at least one type of mower unit of the plurality of mower unit types, a mounting bracket to receive a mower unit, the mounting bracket selectively moveable to the predetermined fixed position corresponding to the mower unit type to be received thereby, and a pivot point about which the mounting plate rotates to adjust a position of the mounting bracket in the x-y plane relative to the grinding wheel shaft.

A mower reel grinding system a plurality of mower unit types, including a grinding wheel shaft, the grinding wheel shaft at a fixed position in an x-y plane. A mounting plate includes a number of predetermined fixed mounting positions on the mounting plate, each predetermined fixed mounting positions corresponding to at least one type of mower unit of the plurality of mower unit types, a mounting bracket to receive a mower unit, the mounting bracket selectively moveable to the predetermined fixed position corresponding to the mower unit type to be received thereby, and a pivot point about which the mounting plate rotates to adjust a position of the mounting bracket in the x-y plane relative to the grinding wheel shaft.

One example provides a grinding positioning plate for a reel-type mower unit including a cutting reel having a rotational axis. The grinding positioning plate includes a main body including a pivot element having a pivot axis, and at least one pair of clamping assemblies, each clamping assembly to clamp to a corresponding mounting flange of the reel-type mower unit to mount the main body to reel-type mower unit such that the pivot axis is in parallel with the rotational axis and at a known horizontal distance from the rotational axis.

One example provides a grinding positioning plate for a reel-type mower unit including a cutting reel having a rotational axis. The grinding positioning plate includes a main body including a pivot element having a pivot axis, and at least one pair of clamping assemblies, each clamping assembly to clamp to a corresponding mounting flange of the reel-type mower unit to mount the main body to reel-type mower unit such that the pivot axis is in parallel with the rotational axis and at a known horizontal distance from the rotational axis.

A blade sharpener for use with a powered rotary tool having a rotatable sharpening element includes a main body having a bore for receiving the powered rotary tool, where the bore extends through the main body along an axis and the main body has a first channel for receiving a blade to be sharpened. The first channel is perpendicular to the rotary axis and opens into the bore to permit a blade to engage the sharpening element. The blade sharpener also includes a guide having a guide channel for receiving a blade to be sharpened where the guide is pivotally attached to the main body to accommodate any curvature of a blade to be sharpened as the blade sharpener follows along the blade.

A blade sharpener for use with a powered rotary tool having a rotatable sharpening element includes a main body having a bore for receiving the powered rotary tool, where the bore extends through the main body along an axis and the main body has a first channel for receiving a blade to be sharpened. The first channel is perpendicular to the rotary axis and opens into the bore to permit a blade to engage the sharpening element. The blade sharpener also includes a guide having a guide channel for receiving a blade to be sharpened where the guide is pivotally attached to the main body to accommodate any curvature of a blade to be sharpened as the blade sharpener follows along the blade.