How to Refill a Salt and Pepper Grinder (Any Brand)

Every refillable grinder on the planet opens one of three ways, and two of them take less than a minute once you have seen the trick. This guide covers the standard top-screw wooden mill first — the design used by Haomacro and most kitchen brands — then the supermarket special cases people actually search for.

What you need

• Your grinder(s), worked over a tray or a sheet of paper — peppercorns bounce.
• Whole peppercorns for the pepper mill; coarse, dry sea salt (or dry Himalayan crystals) for the salt mill. Nothing damp, oiled, or flaky.
• Optional but excellent: a small funnel, or a sheet of paper rolled into one.

The one-minute routine (top-screw wooden mills)

1. Unscrew the top nut. The knurled metal knob at the very top turns counter-clockwise until it lifts off. Set it down cup-side up so the small parts stay put.
2. Lift the cap. With the nut off, the wooden head lifts straight up, exposing the filling chamber. On Haomacro mills the S or P mark on the head tells you instantly which jar to reach for — no marks on yours? Here is how to tell which mill is which.
3. Pour to four-fifths. Fill to about 80% — seasoning needs room to tumble toward the mechanism. On a windowed mill like the Haomacro 6.5-inch classic, stop when the acrylic window reads nearly full.
4. Reassemble. Seat the head back on the central spindle and screw the nut down until snug — then remember its position, because that nut is the coarseness setting (details in our coarseness guide).
5. Test-grind over the tray. Five turns. If nothing comes out, loosen the nut half a turn; the chamber may simply be packed too tight at the fine setting.

Brand specifics

Haomacro and similar wooden mills

Pure top-screw design, no tools ever needed. The one habit worth forming: refill the salt mill in a dry moment — not over a steaming pot — because humidity is what later cements salt around any mechanism. Both windowed and windowless Haomacro bodies (see the full range) open identically.

McCormick and other supermarket grinders

Check before you pour: many disposable grinders are sealed by design — the cap is glued or child-locked, and the maker intends the whole unit to be discarded. If the cap has no visible thread and will not turn with firm hand pressure, it is a sealed unit; forcing it usually cracks the plastic. That disposability is a fair reason to move to a refillable wooden mill — our refillable grinder guide ranks the sets built to be opened.

ALDI (Stonemill) and store-brand mills

Most store-brand glass mills are honest top-screw designs like the wooden ones: grip the metal cap, turn counter-clockwise, refill, close. If the cap spins without unscrewing, you have the click-lock variant — pull the head upward firmly while turning.

Mills without a window

No window means no warning, so use the calendar instead: top up windowless mills (like the taller Premium Modern set) on the first of the month, and they will never surprise you mid-recipe.

Troubleshooting

Symptom	Cause	Fix
Top nut will not budge	Salt residue in the thread	Wrap a dry cloth for grip; work it loose gently — never pliers on wood
Salt pours out in chunks	Damp salt clumped	Empty, dry overnight, refill dry — full de-clump routine
Grinds fall out of the base when set down	Coarseness set very loose	Tighten the top nut clockwise a half turn
Nothing comes out after refill	Chamber packed at a fine setting	Loosen counter-clockwise, grind five turns, re-tighten to taste

What to fill with

Whole black peppercorns (Tellicherry if you enjoy pepper enough to notice), and coarse dry sea salt. Skip smoked, oiled, or “wet” gourmet salts — they belong in a pinch bowl, not a mechanism. For which mill suits which cook, our manual grinder guide breaks it down by use.

Frequently asked questions

How full should I fill a salt or pepper grinder? +

About four-fifths. The contents need space to tumble toward the mechanism; a packed-solid chamber grinds poorly and strains the rotor at fine settings.

Can I refill a McCormick grinder from the supermarket? +

Often no — many are sealed, single-use units with glued caps. If the cap has no thread and resists firm hand pressure, it is not designed to open; a refillable mill is the long-term fix.

Why did my salt grinder jam after refilling? +

Almost always moisture: damp or flaky salt clumps around the mechanism. Empty it, let the mill dry overnight, and refill with coarse, visibly dry crystals.

Do I need a funnel? +

A small funnel makes it spill-proof, but a sheet of paper rolled into a cone works exactly as well and lives in every kitchen already.

Can I put pepper in the salt mill and vice versa? +

Mechanically yes — the mills in a set are identical. Practically, keep the S and P assignments: pepper oils leave a scent that will ride along with your salt afterwards.