Rotary impact tool

A rotary impact tool comprising:

• a driving unit;
• a spindle rotated by the driving unit;
• an anvil disposed in front of the spindle in a direction of a line of rotational axis of the spindle;
• a primary hammer rotatable around the line of rotational axis of the spindle and movable in the direction of the line of rotational axis;
• a cam structure in which at least one steel ball is disposed between a guidance groove of the spindle and an engagement groove of the primary hammer;
• a secondary hammer rotatable with the primary hammer as one piece;
• a support member that rotatably supports the secondary hammer;
• a retaining member that retains the support member;
• and
• a carrier positioned at a rear end of the spindle and including a front member and a rear member, wherein gears for transmission of power are arranged between the front member and the rear member, wherein
• the retaining member is separate from the spindle and has a retaining surface for retaining the support member, a retaining groove formed on an outer circumference of the retaining surface, and a mounting surface contacting the carrier,
• the retaining surface is on a first side of the retaining member and the mounting surface is on a second side of the retaining member,
• the first side is axially opposite the second side, and
• the mounting surface includes a recess having a shape that corresponds to a shape of the front member and the front member is received within the recess such that the carrier is coupled to the mounting surface and the retaining member and the spindle rotate together.