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[[Image:jointer photo|175px| ]]
Name Jointer
Owner TBD, best contacts are Greg Smith or Dave Scholl.
Make Model Chiu Ting WJT-150 (6 inch jointer)
Part Number S/N 4932
Date Acquired
Storage Location The jointer should be stored in the Wood Shop. It is on a wheeled base so it can be rolled out to provide clearance for working with long boards.
Authorization Required
Documentation * Wikipedia has an excellent article on the Jointer.
Other References * Jointer consumables are on this list: Wood Shop Consumables


The jointer does one important thing very well. It creates a perfectly flat surface, either on the face of a board, or on the edge (with the face of the board riding against the jointer's fence). When milling rough lumber, the jointer represents the first step, producing one flat face and one straight edge for reference. The board then moves to the planer for thicknessing and the tablesaw to be cut to final width. To work properly the outfeed table should be set at the exact same height as the blades. The position of the infeed table determines the depth of cut, and multiple passes can be taken to produce a completely flattened surface.


  • Wear ear and eye protection.
  • Do not wear jewelry, long sleeves, or loose clothing.
  • To prevent nicks on the blades, please check your board carefully and remove nails, screws, and any other metal bits.
  • Work with natural wood only, please! Masonite, for example, will quickly dull the blades. Even plywood, particleboard, MDF, and the like will shorten the blade life because of the glue content.


The following is a list of safety precautions to take into account when operating a jointer.

  • Always read and follow the manufacturer's instructions.
  • Wear ear and eye protection.
  • Do not wear jewelry, long sleeves, or loose clothing.
  • Check the depth of cut before turning machine on.
  • Adjust depth of cut to less than 1/32 in. for material with knots, 1/16 in. for clear material.
  • Avoid deep cuts as they can cause kickback.
  • Never joint stock less than 12 in. long.
  • Never edge joint material less than 1/4 in. thick, 3/4 in. wide or 12 in. long.
  • Never face joint material less than 3/8 in. thick, 3/4 in. wide or 12 in. long.
  • Always have the blade guard in place.
  • Stand to one side of the jointer, not directly behind it.
  • Stand at the left side of the cutterhead -- never stand at the end of the front table, because a board may accidentally kick back.
  • Keep your eyes and undivided attention on the machine while using it.
  • Allow the cutterhead to reach full speed before starting a cut.
  • Keep your hands on top of the work and use a hold down.
  • Use paddles, push blocks, and push sticks to keep your hands 6 in. away from from the cutterhead at all times.
  • Never feed material with your thumb or fingers on the end of it; keep them on top of the material.
  • Always try to plane in the direction of the grain - never plane the end grain of narrow stock (less than 8 inches).
  • Surface the concave (hollow) side of a warped board first.  
  • Keep the floor around the machine clean and clear of scrap wood.
  • Keep knives sharp and the machine adjusted properly.

Maintenance Info

  • Two critical adjustments need to be maintained on the jointer.
    • The infeed and outfeed tables need to be parallel to within 0.001 in. or so.
    • The blades need to be 0.001 in. higher than the outfeed table.
  • If the power switch sticks in the ON position, take it apart and look for compacted sawdust in the switch mechanism.
    • The switch was last cleaned on 2012-10-14.


  1. TBD


  • The sawdust chute dumps directly onto the floor. Perhaps a box or a dust collection hose would make cleanup more convenient.