The 8 Best Jointers
8. Grizzly G0725
7. Wen 6560
6. Shop Fox W1829
5. Porter Cable Variable
4. Delta Power Tools 37-071
3. Cutech 40160H-CT
2. Jet JJ-8HH
1. Powermatic 1791317K
Jointers Versus Planers
A jointer is designed to square an edge or flatten and straighten a warped piece of wood. Planers are designed to help a woodworker create a uniform thickness throughout an entire board and make its two faces parallel.
Bench-style jointers will have an infeed table, which is where the board enters, and an outfeed table, which is where the board exits the machine. Inside the machine, there is a cutter head mounted between the two tables. Its cutting blades aligns flush with the outfeed table, while the infeed table lowers an equal distance to the amount of wood you want to remove from the board.
When the board passes through the machine, the cutting head removes the desired amount of wood, and then the cut board is supported by the outfeed table on its way out. If one is trying to straighten a warped board, an adjustable fence acts as a guide when the board is placed through the jointer.
Planers should be used after a board has been passed through a jointer to make the entire board a uniform thickness and make the second side parallel with the side that has been flattened by the jointer. The planer will remove wood from the entire length of the board from end to end.
Bench-style planers will have some kind of feed roller, which grabs the board as you feed it into the machine. As it moves through the machine, it runs past a cutting head, which removes some of the wood. Depending on the amount of wood to be removed, the board may have to run through the planer multiple times. Planers are not effective at straightening wood, as they will often just follow the curve in the wood as they plane, resulting in a thinner, but still curved, board.
Determining If You Need A Jointer Or A Planer
The first step before starting to work on a piece of wood, is determining what tool you should be using. This can be done by understanding what type of wood you are purchasing and fully examining it before starting. Purchased wood will usually come in three forms: S4S, S2S, and rough. Rough wood is completely unfinished. It requires the most work before one can start their project.
If starting with rough wood, you will most likely require the services of a jointer and a planer. S4S wood has already been surfaced on all four sides and typically does not require a jointer or a planer unless it is too thick for your desired use or it has warped terribly during storage or transport. S2S wood has two finished sides and may often require a jointer to smooth out the edges before it can be jointed with other pieces.
Once you have your wood, check the edges to see if they are uneven. You should also check the surface along the entire length of the lumber. If the edges are uneven, or if the surface has an unacceptable amount of bumps, a jointer should be used to correct these issues. Next, check the flatness of the wood. If the wood is warped or cupped in any way, a jointer must be used before one starts planing.
If working on a project that requires overly long or wide lengths of wood, you may need to join wood from end to end. This is where a jointer can be especially useful. It will allow you to flatten and smooth the edges to be jointed so that they fit together seamlessly once construction has started.
If the lumber you are using is already perfectly flat and smooth on all the necessary sides, but it is thicker than ideal for an intended application, then it is time to pull out a planner and start making the board thinner. A planer is also the perfect tool if you have lumber with some minor surface blemish or imperfection. It can be used to remove just a small amount of wood, revealing a layer that is free from any surface issues.
Simple Tips For Using A Jointer Effectively
There are a few simple tips that can ensure you get the most from your wood and your jointer. Always make sure you are jointing with the wood grain in the right direction. The grain should be running towards the outfeed table and away from the knives' rotation. If the grain runs in multiple directions, try and position it in a way that the majority of the grain is running correctly.
Double check the height of the outfeed table before starting to ensure that it is perfectly aligned with the knives. If it is too low, the cut will be heavier at the back end of the board. If it is too high, then you will wind up with a concave surface on the board.
One should always start by jointing the face first. After the face has been jointed, you can then joint an edge square with it. This gives you a perfectly flat surface as a reference for later milling and a trued edge for ripping.
The depth of the cuts should be enough that it makes a noticeable difference on each pass, but not enough to tax the motor needlessly. You will achieve better results with multiple passes than by trying to cut everything on one attempt, which can result in a rougher edge or surface that isn't perfectly flat.