Arukh HaShulchan, Orach Chaim 318:7-12

Sugya Map

• Issue: The definition of Tochein (grinding) regarding soft vs. hard substances.
• Nafka Mina: Does the issur of Tochein apply to substances that lack a "growth" (gidul) component, or is it purely mechanical?
• Primary Sources: Shabbat 73b, Shulchan Arukh, Orach Chaim 318:1, Arukh HaShulchan 318:7-12.

Text Snapshot

• Arukh HaShulchan 318:7: "דכל דבר שאינו גידולי קרקע אין בו משום טוחן" (Everything that is not a product of the ground has no issur of grinding).
• Leshon Nuance: The author emphasizes gidulei karka as the metziut prerequisite. If the substance didn't grow from the earth, the act of pulverizing is legally invisible to the Melacha.

Readings

• Rambam (Mishneh Torah, Shabbat 8:15): Limits Tochein strictly to gidulei karka. The chiddush is that Tochein is a derivative of Zoreia (sowing)—transforming the raw material back to a state ready for planting.
• Arukh HaShulchan (ad loc.): Argues that even if some poskim are stringent, the minhag follows the lenient view regarding non-agricultural items (e.g., crushing ice or non-organic minerals).

Friction

• Kushya: If Tochein is merely "breaking down," why does the source matter? Should mechanical disintegration not trigger the issur regardless of the origin?
• Terutz: The Melacha isn't about the physical act of "making small," but about tikkun (preparation). If the object cannot be planted/grown, the act lacks the telusha (detachment) context required for the Av Melacha.

Intertext

• Shulchan Arukh, Orach Chaim 318:1: Matches the Arukh HaShulchan’s premise.
• Mishnah Berurah 318:13: Notes the Machloket regarding crushing ice (sheleg). He suggests avoiding it lechatchila even if technically permissible, highlighting the tension between theory and yirat shamayim.

Psak/Practice

• Heuristic: While one may grind non-food items (like medicine or hard minerals) if they are not gidulei karka, the Acharonim generally advocate for shinui (doing it differently than usual) to avoid potential Mekalkel (destructive) or Tochein concerns.

Takeaway

• Tochein is not physics; it is botany. If it didn't grow, you aren't "grinding" it in the eyes of the Torah.