Tap centering is a rhythm. Here is where to find it.
Your pot is upside down on the wheel and it is sitting off center. You can stop the wheel and nudge it twenty times, or you can learn to knock it true in about four taps while it keeps spinning. Everyone who makes that look easy is doing the same thing: listening for a beat.
Below you will find a practice wheel that runs in your browser, then four ways potters actually get a pot on center, explained properly.
Below you will find a practice wheel that runs in your browser, the one technique worth learning, and the three things that go wrong first.
- Four techniques
- One technique that works
- Free practice tool
- No wheel required
Tap centering, in five sentences
The pot rides with the wheel, so its widest point sweeps past your parked hand once every revolution. That is the beat. Push that widest point toward the middle of the wheel at the moment it arrives, and the pot moves in. Tap any other side, or at any other moment, and it moves somewhere new instead. Four honest taps is par, because a well timed tap takes out about half of whatever is left.
The mistake everybody makes first
They tap when they see the fat side. By the time your eye reports the bulge and your arm agrees to move, it has already gone past, so the tap lands sideways and shoves the pot somewhere new. You cannot watch this. You have to count it.
Find the beat before you sit down at a wheel
The pot rides with the wheel, so the fat side swings past your hand once every single revolution. Tap it as it goes by and the pot moves toward the middle. Tap at the wrong moment and you push it somewhere else. That is the entire skill, and this is a place to practice it while you wait for coffee.
If any of that sounds like nonsense, read the rest of the page first. It only takes a few minutes, and the tool makes a great deal more sense once you know why the beat exists. Press the question mark in the corner of the wheel and every control will explain itself, or press Teach me how and the wheel will count you in and call every tap.
Press the question mark in the corner of the wheel and every control explains itself. Press Teach me how and the wheel will count you in and call every tap.
The practice wheel runs in a browser, so it is not on this printout. It lives on the tap centering page at theclayhole.com.
How to practice this so it actually transfers
- Learn which way to push Start in Free hand at 20 RPM and tap the fat side until moving it toward the middle feels obvious.
- Find the beat Switch to One hand, fixed . Watch the fat side swing past your hand and count it out loud. One, two, one, two.
- Tap on the count Not when you see the bulge. Seeing it and then deciding is already too late, every time.
- Then turn it up When you can center it in four taps at 38 RPM twice in a row, raise the speed and find the beat again.
Being straight with you: this trains your timing and it trains which way to push. It cannot teach your hand how hard to tap. That part only ever comes from clay.
How to practice this so it transfers
Start in Free hand at 20 RPM until pushing the fat side toward the middle feels obvious. Switch to One hand, fixed , count the beat out loud, and tap on the count. Four taps at 38 RPM twice in a row, then turn the speed up and find the beat again.
This trains your timing and which way to push. It cannot teach your hand how hard to tap. That part only ever comes from clay.
Press start and the wheel begins turning.
- Right on the beat
- Close enough to help
- Barely helped
- Made it worse
Tap strikes at the marker on the rim. Watch the fat side arrive there and hit it on that beat. You can also tap the wheel itself, drag the marker around the rim, or press the spacebar.
On center.
38 RPM
One turn every 1.6 seconds.
Right or left handed? A right handed potter sits at six o'clock, braces on the pan to the right and works at three o'clock, with the wheel turning counterclockwise. A left hander mirrors all of it: nine o'clock, and the wheel reversed. Pick yours and the marker and the direction both move, because the tap always leans the way the wheel is already going.
Practice tapping Free hand lets you tap anywhere, which teaches you which side to push. One hand, fixed pins your hand in one spot like a real wheel, so timing is the only thing left to get right. Learn the first, then live in the second.
So what is tap centering, exactly?
You threw a pot. It dried to leather hard. Now you want to turn it upside down and cut a foot into the base, which means the pot has to spin true, and almost nothing ever lands on the wheel perfectly true.
The slow way is to stop the wheel, nudge the pot, start it again, look, stop it again. Tap centering is the fast way. You leave the wheel turning and knock the pot into place with small taps while it spins, reading where it is out by feel or by eye. Done well it takes a few seconds and about four taps.
There are four ways potters do this. They all solve the same problem and you only ever need one of them, though most people end up using the rings to set the pot down and one of the other three to finish it.
Why it feels impossible right up until it does not
Nobody is reacting fast enough to hit a moving target. They are counting. Once you see why a beat exists, the whole thing stops being a magic trick.
- The wheel's true center. Everything you are about to do is aimed at moving the pot onto this point and nowhere else.
- The pot's center, sitting somewhere else. The distance between these two is the whole problem. Call it the offset.
- The fat side. The one spot on the pot that reaches out further than any other. It is always directly opposite the direction the pot needs to move.
- The circle the fat side traces. Because the pot rides on the wheel, that fat side comes back around to the same place every single revolution. This is the beat.
- Your hand, parked and not moving. The fat side arrives here, then leaves, then arrives again. Once per turn, forever, until you do something about it.
The two rules underneath every technique on this page
Push the fat side toward the middle. Not the thin side, not wherever your hand happens to be. Tapping the wrong side moves the pot further out, and tapping the side at ninety degrees to it just spins the problem around to a new spot.
Do it while the fat side is at your hand. That window is short. At a normal trimming speed you have roughly a tenth of a second to land a clean tap, which is why counting beats works and watching does not.
The finger post
This is the one most potters end up using, the one the practice wheel above teaches, and the one worth the effort. Your finger becomes a metronome and your other hand does the tapping.
The one most potters end up using, and the one the practice wheel above teaches. Your finger becomes a metronome and your other hand does the tapping.
- Set the pot down against the rings first. Wheel stopped, slide the pot until the margin against the nearest ring looks the same all the way around. No skill, two seconds, and most of the error is gone before you start.
- Wheel at thirty to forty, and park a braced fingertip beside the base. Three o'clock right handed, nine o'clock left handed, forearm on the wheel pan, close enough that the fat side just brushes it.
- Watch the base, not the rim. A rim can be out of round on its own. The base edge is the one you are about to cut.
- Count the brushes out loud for several turns. One, two, one, two. Do not touch anything yet. You are learning the tempo.
- Tap on the count with your other hand. Toward the middle, leaning slightly the way the wheel is already turning. A tap, not a shove. The beat moves after every imperfect tap, so find it again before the next one.
- Set the wheel slow to medium. Slow enough that you can count it, fast enough that the pot keeps its own momentum. Around thirty to forty revolutions a minute is the zone.
- Park a fingertip beside the base of the pot. Right handed, that is roughly three o'clock, with your forearm braced on the wheel pan. Level with the base, not up on the wall, and close enough that the fat side just brushes it as it comes around. Braced is the point: an unsupported finger drifts without you noticing.
- Watch the base, not the rim. The rim can be out of round all on its own. The base edge, where you are about to cut a foot, is the only edge that matters.
- Count the brushes out loud. One, two, one, two, one beat every time the pot kisses your finger. Do this for several revolutions before you touch anything. You are learning the tempo, not fixing the pot yet.
- Tap on the beat with your other hand. Toward the middle of the wheel, and leaning very slightly the way the wheel is already turning. A tap, not a shove. Think of flicking a light switch.
- Re-listen, then tap again. The beat moves after every imperfect tap, so find it again before the next one. Three or four honest taps and it is running true.
Watch: How to Tap Center Pottery, A Beginner's Guide Florian Gadsby, on YouTube
Covers the counting rhythm and using a steady finger as your guide, then works up to reading the pot by eye alone. Nothing loads from YouTube until you press play. Open it on YouTube instead .
If you throw left handed
Mirror the whole thing. Your post finger sits at nine o'clock instead of three, the wheel usually runs the other way, and the slight lean on the tap still goes whichever way the wheel is already turning. The practice wheel above has a left handed setting that flips both for you.
The one thing that makes this click
Do not tap when you see the fat side. Tap on the count. By the time your eye reports the bulge and your arm agrees to move, it has already gone past, and you end up pushing the pot sideways instead of inward. Everybody makes this mistake first.
If you need it working tonight
Do not tap at all. Brace a knuckle in the pot's path with your wrist locked against the wheel pan, so your hand is a wall rather than a cushion. The pot knocks against it once a turn and gives up ground each time. Creep inward as the knocking softens, stop when it stops. Slower, and it can mark a soft wall, but it works the first time you try it.
The bump
The forgiving one. You do not tap at all. You park something solid in the pot's way and let the pot hit it, over and over, until it has knocked itself onto center. The timing takes care of itself, because the pot can only arrive when the pot arrives.
- Brace a knuckle or the side of your finger in the pot's path. Just inside where the fat side is reaching. Braced is the important word. Your hand has to be a wall, not a cushion, so lock your wrist against the wheel pan.
- Let it hit. Every revolution the fat side strikes your knuckle and gives up a little ground. You will hear it as much as feel it, a soft knock that comes once a turn.
- Creep inward as the knocking softens. As the pot centers, the knocks get quieter and then stop. Move your hand in a hair and let it find the new fat side.
- Stop when the knocking stops. No knock over several full turns means the pot is running as true as this method will get it, which is usually plenty for trimming a foot.
Watch: Tap Centering While Trimming, with S.C. Rolf Ceramic Arts Network, on YouTube
A short one, and the useful part is the practice drill: learn the motion on an empty tin can before you risk a real pot. Nothing loads from YouTube until you press play. Open it on YouTube instead .
Why it is worth knowing
It works the first time you try it, it works when you are tired, and it works on a pot that is only slightly out. Plenty of experienced potters use nothing else.
Where it falls down
It is slower, and on soft leather hard clay a knuckle can leave a flat spot or a smudge on the wall. If the pot is badly out, knock the worst of it off with taps first.
The needle tool pointer
Same beat, read with your eyes instead of your skin. You brace a needle tool so the point sits just clear of the pot, and then you watch a gap open and close. Some people find a moving gap far easier to read than a faint brush against a fingertip.
- Brace the tool so it truly cannot move. Hand on the wheel pan, tool held like a pencil, point level with the base of the pot and a couple of millimeters clear of the widest reach.
- Watch the gap, not the pot. The gap closes to nothing as the fat side arrives and opens to its widest half a turn later. That pulse is the same beat the finger method feels.
- Tap when the gap shuts. Your tapping hand goes in at the tool, or at whatever fixed spot you have chosen, at the moment the gap disappears.
- Move the tool in as the gap evens out. When the gap stops changing all the way around, the pot is centered. Then you have a ready made caliper for marking your foot ring.
The other advantage is that it does not touch the pot. On thin or very soft work, where a finger would leave a mark, the tool gives you the same information for free.
The wheel head rings
Being honest, this one is barely tapping. It is how you set the pot down in the first place, and doing it well means the other three techniques have almost nothing left to fix. Skipping it is why people end up tapping twenty times.
- Use the rings cast into the wheel head. Every wheel head has them. With the wheel stopped, set the pot down and read the foot against the nearest ring, all the way around.
- Look for the side where the margin is wrong. If the foot swallows a ring on one side and leaves a wide band showing on the other, that tells you the direction and roughly the distance you are out.
- Slide, do not tap. With the wheel stopped, push the pot toward the crowded side until the margin looks the same on every side. Then start the wheel and fix whatever is left with one of the methods above.
If your wheel head has no rings you can see
Draw your own. A pencil or a fine marker held steady against the turning head gives you a permanent circle in about two seconds, and one ring at the diameter you use most is worth more than a whole set.
Which technique should you use
Most potters end up with two: the rings to set the pot down, and one of the other three to finish it. Here is the honest comparison.
| Technique | How hard to learn | How fast once you have it | Best for | The catch |
|---|---|---|---|---|
| The finger post | Hardest. Days, not minutes. | Fastest. Three or four taps. | Anyone trimming more than a couple of pots at a sitting. | Until the rhythm lands you will make pots worse before you make them better. |
| The bump | Easiest. Works the first try. | Slow but steady. | Beginners, and pots that are only a little out. | Can mark or flatten soft walls, and it struggles when the pot is badly off. |
| The pointer | Middle. Easier if you are a visual learner. | Nearly as fast as the finger post. | Thin, delicate or very soft pieces you would rather not touch. | One more thing to hold steady, and it does nothing if your bracing is sloppy. |
| The rings | No skill at all. | Instant, but it only gets you close. | Every single pot, before you do anything else. | It is a starting point, not a finish. Something still has to close the last little bit. |
Whichever you choose, the pot still has to be held down once it is centered. Three small coils of clay pressed against the base, or a bat with a bit of grip, and it will stay put while you cut.
When it is not working
Nine things that go wrong, and what each one actually means.
The three that stop people on the first night.
Every tap makes it worse, not better
Your timing is more than about seventy degrees off the beat, which means you are pushing the pot sideways rather than inward. Adding force will not help and will make it worse faster. Slow the wheel right down, stop tapping, and just count the brushes against your finger for a full ten revolutions until the tempo is in your body. Then tap once and see what happened.
It gets close and then bounces back out
You are tapping too hard for how far out it is. A tap that would have been perfect at ten millimeters off will shoot the pot straight past center when it is only two millimeters off. As the pot gets closer, your taps have to get lighter, right down to a fingernail flick at the end. This is the part a screen cannot teach you.
The pot slides right off the wheel head
Either the wheel head is wet, or you are hitting far too hard. Tap centering wants a dry head and small taps. If the surface is slick, wipe it, and if the pot is very light, rest a finger gently on top as a brake so your tap moves it a little instead of a lot.
I cannot feel the fat side brush my finger at all
Your finger is too far out. Move it in a hair at a time until it just catches, and make sure your hand is genuinely braced, because an unsupported finger drifts away from the pot without you noticing. If you still cannot feel it, use the needle tool pointer instead and read the gap with your eyes.
The rim looks wobbly but the base looks fine
Then the base is fine and you should trim it. A rim that is slightly out of round is a throwing artifact, and chasing it will pull a perfectly centered foot off center. Watch the base edge, because that is the edge the tool is about to cut.
My taps land in the right place but nothing moves
The pot has stuck to the wheel head, usually because it went down slightly damp or has been sitting there a while. Lift it, wipe the head, set it back down and start again.
It centers, then goes out again while I trim
Nothing is holding it. Centering and securing are two separate jobs. Once it runs true, stop the wheel, hold the pot still, and press three small coils of soft clay against the base at roughly equal spacing. Then trim.
How close is close enough
Close enough that the base edge no longer appears to move against a fixed finger or tool. A wobble you can only see if you are looking for it will not show in the finished foot. Chasing the last hair of it costs more pots than it saves.
Should the wheel go clockwise or counterclockwise
Whichever direction you throw in. The technique is identical either way, with one detail flipped: the slight lean you put on the tap always goes the same way the wheel is already turning, so it changes with the direction.
The rhythm is the whole skill. Everything else is just clay.
Potters who tap center well are not faster than you and they are not more coordinated than you. They have simply counted the beat enough times that they no longer have to think about it. Five minutes on the practice wheel while you are waiting for something is worth more than an hour of frustrated tapping at a real one.
Potters who tap center well are not faster or more coordinated than you. They have counted the beat enough times that they no longer think about it. For the other three techniques and the reasoning underneath, the toggle at the top of the page has all of it.
Which version would you like to print?
The practice wheel and the videos come out as labelled boxes with the title and channel to search for, since paper does not play them.