Arukh HaShulchan, Orach Chaim 316:19-24

Sugya Map

• The Issue: The definition of Melechet Tochein (Grinding) within the context of food preparation on Shabbat, specifically regarding Tochein Achar Tochein (grinding after grinding).
• Primary Sources: Shabbat 74a, Shulchan Aruch, Orach Chaim 321, Arukh HaShulchan, Orach Chaim 316:19-24.
• Nafka Mina: Whether the prohibition of Tochein applies to substances that are already pulverized or require only a minor structural change; the distinction between K’derech Achilato (the manner of eating) and K’derech Melachah (the manner of manufacture).

Text Snapshot

The Arukh HaShulchan (R. Yechiel Michel Epstein) approaches the mishnah of Tochein with a characteristic drive toward pshat and accessibility.

• Snapshot: "וכל דבר שאינו עומד לטחינה, אין בו משום טחינה" (Everything not intended for grinding is not subject to the prohibition of grinding).
• Leshon Nuance: Note the use of "עומד לטחינה" (stands/is destined for grinding). Epstein shifts the focus from the physical state of the object to the teleological intent behind the object. He insists that Tochein is not a generic act of breaking down, but a targeted act of Mlechet Machshevet—the creation of a new, functional state (flour) from a raw state (grain).

Readings

1. The Rambam (Hilchot Shabbat 8:15)

The Rambam famously narrows the scope of Tochein to "grinding grain." His chiddush is that the av melachah is specific to the grain-to-flour transformation. The Arukh HaShulchan adopts this restrictive reading, arguing that since the Torah’s primary "grinding" context is the Tabernacle (which involved processing grain for dye or bread), any act not mimicking this process is merely a toladah or entirely permissible.

2. The Chazon Ish (Orach Chaim 57:1)

In sharp contrast, the Chazon Ish rejects the restrictive grain-only paradigm. His chiddush is that Tochein is a general prohibition against the "disintegration of a substance" (p’rur). For the Chazon Ish, the physical act of breaking down a coherent mass into particulate matter—regardless of the substance—constitutes Tochein. The Arukh HaShulchan stands as the masorah bridge here; he acknowledges the Chazon Ish-like stringency in specific cases but insists that the definition of Tochein must remain tethered to the derech hamelachah (the professional manner of grinding).

Friction

The Kushya

If Tochein is defined by the transformation into flour, how do we account for the prohibition of grinding spices or medicinal herbs? The Mishnah in Shabbat 73b lists grinding as an av melachah, and the Gemara assumes one is liable for grinding spices. If we adopt the Arukh HaShulchan’s focus on "grain-like" behavior, spices (which don't become "flour") should theoretically be exempt.

The Terutz

The Arukh HaShulchan resolves this by invoking the concept of Melechet Machshevet. He argues that the issur is not the result (flour), but the act of creating a refined, usable substance where one did not exist before. He differentiates between "breaking" (shevirah) and "grinding" (t’chinah). Shevirah is the destruction of an object; T’chinah is the creation of a new, granular form. If the substance is already in a state where it is edible or usable, the act of further reduction is Tochein Achar Tochein—which is permissible because the "creation" has already occurred. This neatly avoids the Chazon Ish’s blanket prohibition while maintaining the integrity of the Mishnah’s list.

Intertext

• Parallel 1: Shulchan Aruch, Orach Chaim 321:10. The Mechaber discusses the grinding of soft foods (like eggs or cooked vegetables). The Arukh HaShulchan utilizes this to bridge the gap between hard grains and soft foods, arguing that if a food is already cooked, the prohibition of Tochein is fundamentally weakened because the "processing" phase is complete.
• Parallel 2: Beit Yosef, Orach Chaim 321. The debate regarding whether Tochein applies to fruits and vegetables. The Arukh HaShulchan aligns with the Beit Yosef’s lenient stance for l’altar (immediate consumption), suggesting that the mlecha only takes root when the intent is to store the ground product.

Psak/Practice

In practice, the Arukh HaShulchan provides a heuristic for modern kitchen conduct. If one is preparing food immediately before a meal, the prohibition of Tochein is significantly mitigated by the principle of l’altar.

• Heuristic: If the action changes the physical form but does not create a new "material" (e.g., chopping a tomato for a salad), it is generally permissible, provided it is done l’altar. The Arukh HaShulchan provides the underlying logic: since the tomato is already "edible," you are not "creating" flour; you are merely rearranging the geometry of the food.

Takeaway

The Arukh HaShulchan teaches that Tochein is a matter of teleology: one is only liable if they are performing a "manufacturing" act, not a "culinary" act. If the food is already prepared, the act of further refinement is merely a change in state, not a mlecha.