Hand plane types explained: jack, smoother, jointer, and block plane functions

The hand plane category has accumulated enough mythology — about Stanley Bedrock vs. Bailey, about Lie-Nielsen vs. Veritas, about Japanese vs. Western — that new buyers often lose sight of the functional question: what does this specific plane type actually do, and do I need it?

Here is the functional breakdown.

The jack plane (No. 5)

The jack plane is 14 to 15 inches long, the middle length in the bench plane family. "Jack" is a corruption of "jack of all trades" — it is the generalist plane, the first one most woodworkers should buy.

The jack plane is configured for fast material removal, not final surface quality. The blade is ground with a pronounced camber (a slight arc, typically 3–4mm across the width) so that it takes a slightly curved shaving rather than the full-width shaving of a flat blade. The curved shaving removes material efficiently without digging in at the corners and without the long tear-out runs that a flat blade can produce in contrary grain.

The jack plane traverses a board — run diagonally across the grain, not with it — to knock down high spots, break down rough-sawn texture, and flatten a board quickly. This is preparatory work; the surface left by a well-set jack plane is scalloped and rough, ready for a smoothing plane, not a finish coat.

Where the jack plane earns its keep in a furniture shop: reducing a rough-sawn board to near-flat, removing machine planer snipe, bringing a glued-up panel to flat before a final pass with the smoother. It is a workhorse, not a finishing tool.

A used Stanley No. 5 (pre-war, type 11–15) from a flea market or estate sale, sharpened and tuned, works as well as a new premium plane for jack work. This is the correct place to be frugal in the hand plane budget.

The smoothing plane (No. 4)

The smoother is 9 to 10 inches long — shorter than the jack, which is intentional. The shorter sole can follow slight undulations in the surface without bridging over them, making it effective at producing a truly flat, glass-smooth surface after the jack has done the preparatory work.

The smoother blade is ground flat or with a very slight camber (less than 1mm), set for a fine shaving — tissue-paper thin in a well-tuned plane. The shaving should be translucent when held to light. At this setting, the smoother leaves a surface that needs minimal sanding (often just 220-grit to knock off any raised grain before finishing) or no sanding at all on cooperative grain.

The smoother is the plane where premium matters. The fit between the frog (which holds the blade assembly) and the body determines how much chatter and vibration reaches the blade, and chatter produces a surface with a subtle washboard pattern that is invisible until finish is applied and suddenly very obvious. Premium iron planes (Lie-Nielsen, Veritas) or heavy bronze planes have enough mass to damp vibration that lighter planes cannot. A well-tuned vintage Stanley No. 4 can match them in capable hands, but it requires more skill to tune to that level.

The smoother excels at figured wood: highly figured maple, burl, crotch figure, and any grain that machines with heavy tear-out. A scraper cabinet scraper is the other tool for this job; the choice between plane and scraper depends on the specific figure and the woodworker's preference. Both work; neither is wrong.

The jointer plane (No. 7 or No. 8)

The jointer plane is 22 to 24 inches long — the longest bench plane made. The long sole bridges over any low spots and cuts only the high points, progressively flattening the surface until the plane cuts evenly across the full width. This is the same principle as a machine jointer: the long reference surface determines the plane.

The jointer plane is the correct tool for: preparing edges for jointing (edge planing two boards so their edges mate without a gap), flattening a wide panel that is too large for a machine planer, and truing up a frame or carcase that is slightly out of flat after assembly.

For edge jointing, the plane technique is to work two mating edges simultaneously — flip one board so the faces are toward each other, clamp them together, and plane both edges as one. Any error in the angle of the plane cancels out when the boards are separated and brought together: an edge that is 89 degrees on one board mates with an edge that is 91 degrees on the other, and the joint is a perfect 180. This is the "shooting both edges as one" technique that eliminates the need for the fence to be exactly square to the sole.

The jointer plane is the last plane most woodworkers need and the one they are most likely to not actually need if they have a machine jointer. If you work primarily with a machine jointer and planer, the No. 7 is a specialty tool. If you work primarily with hand tools, it is essential.

The block plane

The block plane is not a bench plane — it is a different category of tool designed for different work. The blade is bedded at a much lower angle (usually 20–21 degrees, versus 45 degrees for most bench planes), bevel-up rather than bevel-down, which makes it effective on end grain and cross-grain work where a standard bench plane would tear.

The block plane excels at: trimming end grain (fitting a drawer front flush with the face frame, trimming a tenon shoulder to fit, chamfering an end-grain edge), small fitting tasks, and working in positions where a full-size bench plane is too large.

The block plane does not replace any bench plane for face planing. It is a fitting and trimming tool. The Lie-Nielsen No. 60-1/2, the Veritas Low-Angle Block Plane, and the vintage Stanley No. 60-1/2 are all well-regarded; the differences are in quality of machining and longevity, not in functional design.

The router plane (No. 71)

The router plane is often overlooked in discussions of hand planes because it does not look like the others — no tote, no knob, just a flat body with a blade that protrudes from the center. Its function is precise: it registers from the surface surrounding a recess and cuts to a precise depth below that surface.

This makes it the ideal tool for cutting mortises to a consistent depth, fitting dadoes and grooves to exact depth, and fitting hardware recesses (hinge mortises especially) with precision that a chisel alone cannot match.

A router plane is not a beginner's tool — you need to understand what it is doing geometrically to use it effectively — but it solves specific furniture-making problems better than any other tool in the shop.

What to buy first

If you are adding hand planes to a power-tool shop: No. 4 smoother first. It is the plane you will reach for every session — smoothing end grain, fitting a drawer, cleaning up a sawn surface before finishing.

Second: No. 5 jack plane, ideally a used one. Third: block plane. Fourth: No. 7 jointer if you edge-joint by hand or work without a machine jointer. Fifth: router plane when you start doing mortise-and-tenon work or inlay fitting.

The hand plane requires sharpening to function. A plane with a dull blade is a frustrating experience; a plane with a sharp blade — one that will shave end grain cleanly and produce transparent shavings on soft pine — is a satisfying and productive tool. Invest in sharpening setup before the planes, and everything else follows.