Adjusting Bosch PHO 100 planer blades

Phil Addison · 2011-03-20T00:51:24+00:00

I acquired an oldish Bosch PHO 100 planer and having cleaned it up I'mtrying to adjust the blades. It seems very hit and miss on this machine.The blades (755), see exploded diagram held by a flat slotted plate (51) that is held by 2 Allen screws.After adjusting, these 2 screws are covered by a further curvedretaining plate (52) that is held by 3 more Allen screws, so there willbe 5 altogether clamping on the first flat plate. The bladed havegrooves in them that locate them in a fixed radial position against theflat plate. They can be slid out sideways from the plate once the curvedcover is removed.I suspect that I should not have loosened the flat plate at all, itpossibly being a factory setting, but this machine was old and had mucksticking the blades so it wasn't apparent that they should slide out!!The flat plate is slotted to allow the blade height and angle to beadjusted but there is no micrometer adjustment of any kind, you justhave to loosen the screws a bit, try to move the blade slightly andre-tighten, then check the blade height and paralell-ness. I'm attempting this by clamping the planer upside down with the cutdepth set to zero, and laying a strip of wood over the blade. Rotatingthe blade cylinder assembly (850) will then moves the wood an amountproportional to the blade protrusion. The idea is to get near zeromovement of the strip at each end of the blade (and for both blades),showing the blade is both parallel to the sole plate and hardlyprotruding at all.The trouble with this planer is that the slightest loosening of thescrews lets the blade move, hence it is a frustrating business to get itright. By the way, I am not fitting the curved plate (52) until I havecompleted the alignment checks satisfactorily.Axminster sell an alignment gauge, but it won't help with stability ofthe adjustment I missing something here, or does anyone have any tips for making thetask more predictable.Phil

Mar 20, 2011 Last reply: 7 years ago 21 Replies

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woodfordtooling 7 years ago

2 x 82mm TCT PLANER BLADES to fit Bosch PHO-1, PH02-82, PH015-82, PH020-82 Length: 82mm Width: 5.5mm Thickness: 1.1mm Material: Fine grain tungsten carbide No. of blades in a pack: 2 blades These are TCT Planer Blades to suit the Bosch Planer machines using the 82mm Planer Blades and a wide range of other planer blocks from 4 sided moulders to surface thicknessers. You Can Refer :

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Harry Bloomfield 7 years ago

A pointless reply to a post made in 2011?

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