1. Board hammer is the main wear part in the crusher. Its life time is subject to the kind and property of crushed materials. The board hammer and rotator adopt the fastening form that trapezoid groove insert wedge in radial direction, the axial ends use pallet bolt for fixing. This form is easy to disassemble and assemble.
2. The board hammer, designs with two trapezoid grooves, which can be replaced for three times and its utilization is around 60%. See the follow drawing.
3. Replacement procedure:
(1) Loose wedge nut, twist hexagonal socket head bolt to move the wedge down to the lowest position to leave the board hammer from its seat for 5-10mm.
(2) Disassemble the block on hammer ends.
4. The new replaced board hammer is face A, which close contacts with the trapezoid groove 1, 2. After wearing 60mm, turning the board hammer 180° in the first replacement, then face B is upward, contact with trapezoid groove1, 2. After wearing 60mm again, lift the board hammer in the second replacement, the trapezoid groove 2 is empty. After the third wearing of 60mm, you must replace a new board hammer.