Marylou Bryan Jointers August 14th, 2018 - 16:55:34
While the jointer can be used as a planer for small pieces of lumber, the principal function of this woodworking machine is to put a straight, smooth, level edge or edges on a board in preparation for edge-to-edge glue-up. Rabbeting can be accomplished on some jointers but I prefer to use the table saw for this task. Chamfering, or making angled cuts, can be performed by tilting the fence.
As with most woodworking machines, the type of jointer need by a woodworker depends mostly on the production demand of his or her woodworking operation. For hobbyist woodwork or small woodshops, smaller jointers that have a 4 to 6 inch width of cut are usually sufficient, while for larger, multifaceted woodworking operations, a larger jointer with an 8 to 16 inch width of cut is usually recommended.
Assessing the quality of used finger jointers follows the same four-part process of assessing other used industrial woodworking machines. First, you should only shop for a used finger jointer with a professional seller of used wood working machines; otherwise, the jointer's state of wear may not be properly assessed. Second, always investigate a seller's reputation at the Better Business Bureau, avoiding seller's that have unresolved customer complaints on their record. Third, always be sure to ask for a copy of a jointer's official maintenance record to assess whether or not it has been properly maintained. Fourth, conduct a firsthand inspection of the jointer before you buy it, or have a trustworthy third party conduct the inspection on your behalf.
Always unplug your jointer from electrical current before attempting any knife adjustments. In my jointer, an 8" Rockwell/Delta classic, the knives are removed and replaced by using a flat wrench that came with the jointer. This wrench is used to loosen and tighten the hex head machine screws that press against the knives and hold them in place in the cutter head. It is very easy to round over the hex heads, so I am very careful not to do so. I purchased a gadget that helps me align the knives with reference to the outfeed table. It magnetically attaches itself to the surface of the outfeed table and magnetically attracts the knives upwards and holds them in position, exactly level with the outfeed table, while I tighten the hex bolts. Each knife (there are 3 in my machine) must be in the extreme vertical position before it can be individually correctly adjusted and tightened. When all 3 knives have been set properly, they should just touch, but not lift, a flat piece of wood laid on the outfeed table, extending over the cutter head. They must do this across their entire length of each knife.
A wood jointer is power tool used by woodworkers to square and true boards. In other words it will make a board straight and its edges will be at perfect right angles to its top and bottom faces.