Planer wood electric

Planer wood electric

This topic has 5 replies, 4 voices, and was last updated 30 August 2024 at 20:09 by Speedy Builder5.

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30 August 2024 at 09:25 #750011
Speedy Builder5
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@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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30 August 2024 at 09:37 #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
30 August 2024 at 11:07 #750065
not done it yet
Participant
@notdoneityet
One pulley may be keyed?
30 August 2024 at 14:17 #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.
30 August 2024 at 17:23 #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.
30 August 2024 at 20:09 #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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