Methods for production of a guide bar for a chainsaw and a guide bar for a chainsaw

A method for production of a chainsaw guide bar, the method comprising:

• arranging a side plate on each side of a core plate, thereby forming a sandwiched structure with a guide groove between the side plates;
• arranging a spacer within the guide groove;
• joining the core and the side plates to form an elongated guide bar;
• hardening and tempering of the guide bar;
• and
• removing the spacer from the guide groove,
• wherein the spacer is formed integrally with the core plate,
• wherein the core plate comprises a pair of opposite long side edges that extend over an entirety of a length of the core plate from a rear end of the guide bar to a front end of the guide bar to form a base of the guide groove,
• wherein the spacer extends entirely from the rear end to the front end along an entirety of at least one of the long side edges,
• wherein the spacer and a proximate one of the long side edges are separated by a gap between the core plate and the spacer, and
• wherein the gap extends entirely from the rear end to the front end along at least one of the long side edges and is interrupted by at least one frangible bridge operably coupling the spacer to the core plate.

A guide bar for a chainsaw, the guide bar comprising:

• a laminated structure of at least three layers comprising a first side plate, a second side plate, and a core plate disposed between said first side plate and said second side plate;
• wherein the core plate is provided with at least one detachable element,
• wherein the at least one detachable element is formed integrally with the core plate, and
• wherein the core plate comprises a pair of opposite long side edges that extend over an entirety of a length of the core plate from a rear end of the guide bar to a front end of the guide bar to form a base of a guide groove,
• wherein the at least one detachable element extends entirely from the rear end to the front end along an entirety of at least one of the long side edges,
• wherein the at least one detachable element and a proximate one of the long side edges are separated by a gap between the core plate and the at least one detachable element, and
• wherein the gap extends entirely from the rear end to the front end along at least one of the long side edges and is interrupted by at least one frangible bridge operably coupling the at least one detachable element to the core plate.