Circular saw blade assembly for a tree felling head

A circular saw blade assembly of a tree felling head of a type which has peripherally mounted cutting teeth, comprising:

• a circular disc plate;
• a rim around the disc plate;
• tooth holders having respective heads adapted to receive the cutting teeth, and respective shanks projecting behind the heads and adapted to receive bolts for fastening the cutting teeth against the heads of the tooth holders;
• and mounting lug arrangements evenly distributed and outwardly projecting around the rim, each mounting lug arrangement being an integral part of the rim and having opposite lug elements spaced from each other and extending substantially in parallel with a radial plane of the disc plate, the lug elements of each mounting lug arrangement defining an outwardly opened channel having an opening on a side thereof opposite the rim, the opening extending substantially in a tangential direction with respect to the rim, the shank of one of the tooth holders being slideably mountable into the channel;
• wherein:
• each mounting lug arrangement has a C-shaped profile with facing bracing flanges;
• and the shank of each tooth holder has a rounded side substantially matching a bottom surface of the channel, and an opposite side provided with a projecting tongue arranged to substantially fit between the bracing flanges of any one of the mounting lug arrangements.