PRODEM PRB008 - Page 42

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Chisel pins:
Check the chisel pins for wear, every 50 hours of hydraulic hammer use or weekly as well as each time the
chisel is replaced. Any burr and swelling on the chisel pins must be smoothed off carefully by grinding.
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 Circular type chisel pins (PRB008 ~ PRB100):
The initial diameters (D1) of the chisel pins are shown in the following table. Replace the chisel pin, if the
diameter is less than the lower limit (D2) of the diameter.
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 Plate type chisel pins (PRB150 ~ PRB700):
Check the width of the chisel pins including the worn out portion.
If the wear on the first side exceeds 1.5 mm, both chisel pins must be inverted together to use the other side.
Replace the chisel pins, if the final widths are less than lower limits (D2) of the width.
Circular type chisel pin
PRB008 ~ PRB100
Plate type chisel pin
PRB150 ~ PRB700
Dimension limits of Chisel Pins: Unit: mm
Hammer Model
Original Dimensions
(D1)
Lower Limits
(D2)
Pin shape
PRB008 / 010 / 020 / 030 / 040(H) 25 23
Circular
PRB050 30 28
PRB060 33 / 38 31 / 36
PRB100 34 32
PRB150 69 65
Plate
PRB170 / 200 / 250 90 85
PRB300 89 85
PRB400 98 / 108 93 / 103
PRB500 108 / 118 103 / 113
PRB700 130 125