Facing accessory for a portable boring apparatus

A facing accessory for a portable boring apparatus, the accessory comprising:

• a shaft mounting portion for mounting to a longitudinal shaft of the portable boring apparatus extending along a longitudinal axis;
• a tool holder secured to the shaft mounting portion and adapted to receive a facing tool thereon, the tool holder comprising at least an extendable arm for enabling movement of the facing tool towards and away from the shaft mounting portion along a radial axis relative to the longitudinal shaft, the extendable arm having an adjustable length and comprising at least:
• a first section secured to the shaft mounting portion and extending radially away from the shaft mounting portion;
• and
• a second section extending along the radial axis and slidably connected to the first section to allow a translation of the second section relative to the first section along the radial axis, the facing tool being securable to the second section;
• and
• an actuator including a drive assembly operatively connected to the second section of the extendable arm for translating the second section relative to the first section along the radial axis;
• wherein the extendable arm further comprises a third section slidably secured to the first and second sections between the first and second sections so that a translation of the second section drives a translation of the third section along the radial axis;
• wherein the first section comprises a first guide recess and the third section comprises a first protrusion slidably engaged within the first recess, and the second section comprises a second guide recess and the third section comprises a second protrusion slidably engaged within the second recess;
• and
• wherein the first section further comprises a first rack groove extending from the first recess along the radial axis and a first guide rack inserted within the first rack groove, the second section comprises a second rack groove extending from the second recess along the radial axis and a second guide rack inserted within the second rack groove, and the third section comprises an aperture extending therethrough along the longitudinal axis and a synchronization gear rotatably secured within the aperture, the synchronization gear being operatively connected to the first and second guide racks to control an extension of the second and third sections.