A broaching cutter includes a plurality of initial cutting blade stages for cutting formation portions to be tooth body portions in internal teeth, a plurality of intermediate cutting blade stages for cutting the formation portions to be the tooth body portions further deeply, and a plurality of final cutting blade stages for cutting formation portions to be clearance portions located deeper than the tooth body portions, the initial cutting blade stages, the intermediate cutting blade stages, and the final cutting blade stages being sequentially arranged from an upstream side in a cutting direction S. Each of a pair of distal end corners of each of cutting blades in the intermediate and final cutting blade stages has a chamfered shape larger than that of a curved shape of a pair of distal end corners of each of the cutting blades in the initial cutting blade stages.

A broaching cutter includes a plurality of initial cutting blade stages for cutting formation portions to be tooth body portions in internal teeth, a plurality of intermediate cutting blade stages for cutting the formation portions to be the tooth body portions further deeply, and a plurality of final cutting blade stages for cutting formation portions to be clearance portions located deeper than the tooth body portions, the initial cutting blade stages, the intermediate cutting blade stages, and the final cutting blade stages being sequentially arranged from an upstream side in a cutting direction S. Each of a pair of distal end corners of each of cutting blades in the intermediate and final cutting blade stages has a chamfered shape larger than that of a curved shape of a pair of distal end corners of each of the cutting blades in the initial cutting blade stages.

Aspects of the disclosure are directed to a first chip ring that includes a first through slot, a second chip ring that includes a second through slot, and a component disposed between the first chip ring and the second chip ring that includes a component through slot, where the first, second and component through slots are coaxial along a slot axis this is oriented at a non-zero valued angle relative to a planar surface of the component facing at least one of the first and second chip rings.

Aspects of the disclosure are directed to a first chip ring that includes a first through slot, a second chip ring that includes a second through slot, and a component disposed between the first chip ring and the second chip ring that includes a component through slot, where the first, second and component through slots are coaxial along a slot axis this is oriented at a non-zero valued angle relative to a planar surface of the component facing at least one of the first and second chip rings.

A CNC milling machine and broaching tool for forming a magazine well in a firearm lower receiver, the magazine well having a forward end and a rearward end with a plurality of corners in the forward end and a plurality of corners in the rearward end. The CNC milling machine and broaching tool including a CNC milling machine for shaping a blank into a lower receiver having a guide hole with a length and a width and a broaching tool having a length less than the length of the guide hole and a width less than the width of the guide hole. The broaching tool having a single cutting edge for each of the plurality of corners in the forward end and the plurality of corners in the rearward end.

A CNC milling machine and broaching tool for forming a magazine well in a firearm lower receiver, the magazine well having a forward end and a rearward end with a plurality of corners in the forward end and a plurality of corners in the rearward end. The CNC milling machine and broaching tool including a CNC milling machine for shaping a blank into a lower receiver having a guide hole with a length and a width and a broaching tool having a length less than the length of the guide hole and a width less than the width of the guide hole. The broaching tool having a single cutting edge for each of the plurality of corners in the forward end and the plurality of corners in the rearward end.

A broach tool includes a broach tool rake face with a tailored surface topography.

A broach tool includes a broach tool rake face with a tailored surface topography.

A broaching tool includes at least one cutting zone with a cutting face that contacts a workpiece to remove material from the workpiece. At least one cavity corresponds to the cutting zone and is arranged to receive the removed material. A plurality of lubrication channels are supplied with lubricant, each lubrication channel having an inlet opening arranged to receive the lubricant and at least one outlet opening which opens into the cavity. The distance between the outlet openings of two consecutive lubrication channels varies further from the cutting face.

A broaching tool includes at least one cutting zone with a cutting face that contacts a workpiece to remove material from the workpiece. At least one cavity corresponds to the cutting zone and is arranged to receive the removed material. A plurality of lubrication channels are supplied with lubricant, each lubrication channel having an inlet opening arranged to receive the lubricant and at least one outlet opening which opens into the cavity. The distance between the outlet openings of two consecutive lubrication channels varies further from the cutting face.