A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

A walk reel mower has a traction frame that carries a rotatable cutting reel that pushes grass against a bedknife for cutting the grass. A handle assembly extends rearwardly and upwardly from the traction frame. The handle assembly carries a handle that is gripped by a user to operate the mower as the user walks on the ground behind the traction frame. The handle assembly has upper and lower portions that have a telescopic connection to one another to adjust the height of the handle above the ground to accommodate users of different heights.

A walk reel mower has a traction frame that carries a rotatable cutting reel that pushes grass against a bedknife for cutting the grass. A handle assembly extends rearwardly and upwardly from the traction frame. The handle assembly carries a handle that is gripped by a user to operate the mower as the user walks on the ground behind the traction frame. The handle assembly has upper and lower portions that have a telescopic connection to one another to adjust the height of the handle above the ground to accommodate users of different heights.

An autonomous mobile work system (20) includes a drive wheel (34) that is connected to a frame (24) and a rotating blade assembly (36). The rotating blade assembly (36) includes a blade assembly axis of rotation (38) and is connected to the frame (24) within a housing (26). The mobile work system (20) further includes a single motor (40) operably connected to the blade assembly (36). The motor (50) includes a motor output shaft (44) and the motor output shaft (44) includes an output shaft axis of rotation (46). The mobile work system (20) still further includes a gear box (50) operably connected to the drive wheel (34) and the motor output shaft (44). The single motor (50) urges rotation of both the rotating blade assembly (36) and the drive wheel (34). The gear box (50) can include a planetary gear set (104) including a ring gear (110) defining cavities (120) at its outside diameter (124). A locking shaft (126) can rotate between an engaged position and a disengaged position with one of the cavities (120).

An autonomous mobile work system (20) includes a drive wheel (34) that is connected to a frame (24) and a rotating blade assembly (36). The rotating blade assembly (36) includes a blade assembly axis of rotation (38) and is connected to the frame (24) within a housing (26). The mobile work system (20) further includes a single motor (40) operably connected to the blade assembly (36). The motor (50) includes a motor output shaft (44) and the motor output shaft (44) includes an output shaft axis of rotation (46). The mobile work system (20) still further includes a gear box (50) operably connected to the drive wheel (34) and the motor output shaft (44). The single motor (50) urges rotation of both the rotating blade assembly (36) and the drive wheel (34). The gear box (50) can include a planetary gear set (104) including a ring gear (110) defining cavities (120) at its outside diameter (124). A locking shaft (126) can rotate between an engaged position and a disengaged position with one of the cavities (120).

A roller is connected to a harvesting platform for movement with a combine over a ground surface in a direction of travel. The roller includes a first portion defining a first diameter and including a first material, and a second portion defining a second diameter and including a second material. The second diameter is greater than the first diameter. The second portion substantially surrounds the first portion, the second material has different material properties than the first material. The roller extends in the direction of travel and rotates about a second axis which extends generally parallel to the direction of travel.

A roller is connected to a harvesting platform for movement with a combine over a ground surface in a direction of travel. The roller includes a first portion defining a first diameter and including a first material, and a second portion defining a second diameter and including a second material. The second diameter is greater than the first diameter. The second portion substantially surrounds the first portion, the second material has different material properties than the first material. The roller extends in the direction of travel and rotates about a second axis which extends generally parallel to the direction of travel.

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 land preparation implement includes a rotatable drum assembly that includes a tool assembly. The tool assembly includes a tool holder and a tool. The tool includes a plurality of cleats. The tool holder includes a plurality of cleat supports. The cleats and the cleat supports cooperate to facilitate releasable coupling of the tool to the tool holder.