Planer wood electric

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Planer wood electric

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Viewing 6 posts - 1 through 6 (of 6 total)
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  • #750011
    Speedy Builder5
    Participant
      @speedybuilder5

      I have a Bosch PBO-1 electric hand planer. Recently, there is undue vibration from the cutting drum. It seems that the roller bearing on the end of the drum opposite the drive belt had run dry (greased for life) and has worn the shaft down by about 0.003″.

      I was puzzled that the toothed pulley on the motor shaft had a LH thread, but that on the drum it is a RH thread. Rotation of the motor viewed from the pulley end is clockwise.

      I don’t understand!

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      #750021
      Tony Pratt 1
      Participant
        @tonypratt1

        The LH and RH thread configuration is to keep every thing tight in operation, much like a bench grinder.

        Tony

        #750065
        not done it yet
        Participant
          @notdoneityet

          One pulley may be keyed?

          #750157
          Speedy Builder5
          Participant
            @speedybuilder5

            Tony, both pulleys are in the same plane. The motor spindle pulley is prevented from turning by way of a LH thread, so it is self tightening. The planer drum pulley does sit on a taper, but if the taper failed, the pulley would wind itself off and smash into the plastic casing.

            NDY, no keys, just a taper on the drum spindle.

            #750197
            Charles Lamont
            Participant
              @charleslamont71117

              As Tony says, I think. Remember the motor pulley is driven by the motor, but the drum pulley is driving the drum.

              #750242
              Speedy Builder5
              Participant
                @speedybuilder5

                Understood, thanks Gents, regarding the planer, the replacement drum, bearings and probably a new set of brushes is about the same as a Lidl special. I may pass the planer onto my neighbour to totally abuse it like he has done to some of my other tools!

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