Arukh HaShulchan, Orach Chaim 305:5-12

Sugya Map

• Issue: The definition of tashmish (ancillary utility) versus muktzeh in the context of keilim (vessels) designated for forbidden use.
• Nafka Mina: Whether the guf ha-kli (the vessel itself) maintains its status when its primary function is issur, or if the tashmish elevates the object.
• Primary Sources: Shabbat 123a; Shulchan Aruch OC 305; Arukh HaShulchan 305:5-12.

Text Snapshot

• Arukh HaShulchan 305:5: "כל כלי שאינו מיוחד אלא למלאכה האסורה... הרי הוא ככלים שמלאכתן לאיסור."
• Nuance: Note the shift from the Rambam’s focus on the kli itself to the Arukh HaShulchan’s insistence on yichud (designation). The word “m’yuchad” is the fulcrum; if the vessel lacks an explicit mandate for the forbidden, the tashmish remains fluid.

Readings

• Rambam (Hilchot Shabbat 20:1): Asserts that any vessel used for melachah is muktzeh. The chiddush is the categorical nature of the prohibition regardless of whether the owner has a specific "use" in mind.
• Arukh HaShulchan (ad loc.): Argues that muktzeh is a function of da'at (intent). If a vessel is used interchangeably, it lacks the kvi'ut (permanence) required to be classified as a kli she-melachto le-issur.

Friction

• Kushya: If yichud is the driver, why does the Gemara (Shabbat 123a) suggest that even a hammer is muktzeh even if one occasionally uses it as a paperweight?
• Terutz: The Arukh HaShulchan posits that yichud is not merely subjective, but tethered to re'i (visibility/utility). If the tashmish is heter, the yichud is effectively nullified by the act of use, not the intent of the owner.

Intertext

• SA Orach Chaim 308:3: Discusses tashmish for heter and issur. The Mishnah Berurah there (s.k. 12) aligns with the Arukh HaShulchan’s logic that shemirat ha-kli (safeguarding the vessel) defines its status more than its original factory intent.

Psak/Practice

• Heuristic: If a vessel is multi-purpose, it is mutar l'tzorech gufo (for its own use) even if it was previously used for issur, provided it was not meyuchad (dedicated) solely to that issur.

Takeaway

• Muktzeh is not an ontological state of the object, but a legal definition derived from the regularity of its tashmish. If you haven't "married" the tool to the forbidden task, you haven't lost the tool to muktzeh.