ל״ט מלאכות שבת : מלאכת טוחן
ARCHIVES: HILCHOS SHABBOS; 39 MELACHOS; TOCHEN
(PROHIBITION OF GRINDING)
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Halachos for Wednesday, June 1, 2011
1) We will now begin learning the Halachos of the Melacha of “Tochen”, grinding.
In the Mishkan the Melacha of Tochen was
 employed when they ground up the many different spices necessary to 
make the Ketores, incense, as well as grinding wheat kernels to make 
flour used for the Menachos, Lechem HaPanim, Lachmei Todah etc.
The Av Melacha of Tochen is “Grinding”; 
The Tolados of Tochen are applicable to activities where one breaks a 
large item into smaller parts (e.g. chopping, dicing, shredding etc.) as
 we shall see B’Ezras Hashem in the very near future.
Tochen applies to non-food items as well as to food items.
2) One who grinds wheat kernels and 
turns them into flour or grinds any whole spice and turns them into 
powder on Shabbos has transgressed the biblical Av Melacha of Tochen. 
(See Rambam Hilchos Shabbos Perek 8 Halacha 15)
Cutting fruits or vegetables into “very 
small” pieces is biblically forbidden and doing so is a Toladah of 
Tochen. (Shulchan Aruch Siman 321:12)
This applies even to vegetables that are able to be eaten raw. (See Mishna Berura ibid. S”K 38)
What is considered “very small” pieces 
is not clearly defined in the Poskim. (See Biur Halacha Siman 321:12 
Dibur Hamaschil Hamechatech)
Thus, one must be careful to not cut the pieces any smaller then what would usually be considered by people as “very small”.
The fact that the pieces can be further 
cut into even smaller pieces does not automatically render the original 
pieces large enough to be permitted.
It is best to consult a Rav to determine minimum size that the pieces need to be to be permissible on Shabbos.
Halachos for Thursday, June 2, 2011
1) It is permissible to cut a fruit or 
vegetable [or other food item] into sections, and doing so is not 
subject to the prohibition of Tochen.
According to many Poskim, it is even 
permitted to use a specialized utensil (e.g. egg or cheese slicer) as 
only actions that are considered Tochen (i.e. very small pieces) are 
subject to restrictions of specialized utensils (as we shall discuss in 
the near future B’Ezras Hashem.) (See Igros Moshe Orach Chaim Vol. 4 
Siman 74: Tochen;4. See also Shmiras Shabbos K’Hilchaso Perek 6 footnote
 12 quoting HaRav Shlomo Zalmen Auerbach Zatzal)
2) Most  contemporary Poskim maintain 
that the prohibition of Tochen only applies if the food is being diced 
“very small” both in its length and its width, but if slicing a tomato, 
egg or any other item in only one direction, there is absolutely no 
prohibition and it may be slices as thin as desired. (Ruling of Rav 
Moshe Feinstein Zatzal in  Igros Moshe Orach Chaim Vol. 4 Siman 
74:Tochen;3. Rav Shlomo Zalmen Auerbach Zatzal in Shu”t Minchas Shlomo 
Siman 91:13 also rules this way.)
There is a minority opinion that 
maintains that thinly slicing a vegetable, even in one direction, is a 
prohibition of Tochen. (See K’tzos HaShulchan Siman 129; Badei 
HaShulchan 2 quoting the ruling of the Tzemach Tzedek. See also Sefer 
Orchos Shabbos page 217 footnote 12 where he quotes Maran HaRav Yosef 
Shalom Elyashiv Shlita as ruling this way as well.)
For Halacha L’ma’aseh a Rav should be consulted.
Halachos for Erev Shabbos Kodesh, June 3, 2011
(Double Portion L’Kavod Shabbos Kodesh)
Halachos for Erev Shabbos Kodesh
1) If the fruits or vegetables are being
 prepared for a salad immediately before the meal, it is permitted to 
dice them into small pieces. (Rama Siman 321:12 based on Shu”t HaRashba 
Vol. 4 Siman 75)
2) The reason for this is that if being 
done immediately before eating we don’t deem it “grinding” rather we 
deem it a normal “manner of eating” to cut up our food before we eat it.
 (See Mishna Berura Siman 321:44)
The same applies for preparing food for 
one’s pets (or any animals that one is obligated to feed) that the food 
may be cut up for them into small pieces immediately before feeding 
them. (ibid.)
Halachos for Shabbos Kodesh
1) Some Poskim disagree with the above 
leniency of the Rama and maintain that even for immediate consumption it
 is forbidden to cut into very small pieces. (See also Chazon Ish Siman 
57 Dibur Hamaschil U’Bikur and Dibur Hamaschil Aval where he adds some 
more restrictions even for those who do hold of this leniency.)
Therefore, it is best even when cutting 
it into small pieces, to avoid making the pieces too small. (See Mishna 
Berura Siman 321:45.)
2) However, if you see people who are 
not stringent with this, and they prepare their eggs and onions (a 
traditional Shabbos dish in many circles, known in Yiddish as “Aier mit 
Tzvibel”) on Shabbos morning very finely diced, do not chastise them as 
they have on whom to rely, provided they do so immediately before 
eating. (ibid.)
Halachos for Sunday, June 5, 2011
1) We learned yesterday that the Rama allows cutting foods into very small pieces if done immediately before the meal.
However, this leniency only applies if 
they are being cut with a regular knife, but if a special instrument is 
being used (e.g. a grater) to cut them into very small pieces, it is 
prohibited even according to the Rama. (See Mishna Berura Siman 321:45 
and Biur Halacha Dibur Hamaschil Midi)
2) According to some Poskim, the 
leniency of cutting food into small pieces immediately before the meal 
applies only to cutting into small pieces.
However, crushing or mashing fruits and 
vegetables [in the regular manner] is prohibited even if done 
immediately before the meal. (See Chazon Ish Siman 57 Dibur Hamaschil 
V’Aamnam)
Other Poskim, however, do not 
differentiate between cutting and crushing and allow it all if done 
immediately before the meal. (See Shu”t Rivash Siman 184 quoted in Biur 
Hagra Siman 321:10. See also Pri Megadim, Aishel Avraham, Siman 321:14 
and Shu”t Igros Moshe Orach Chaim Vol. 4 Siman 74: Tochen; 4)
Halachos for Monday, June 6, 2011
1) A fruit or vegetable that was cooked 
or baked and thus became soft due to the cooking or baking may be 
crushed or mashed, as it is no longer subject to the prohibition of 
Tochen. (Based on Rambam Hilchos Shabbos Perek 21:13)
Thus, for example, potatoes that have 
been cooked may be mashed in the regular manner with a fork on Shabbos 
(though not with a specialized mashing utensil as we will B’Ezras Hashem
 discuss in the near future.)
2) The above only applies if the items in question were fully cooked to the point of being totally soft.
If they are not fully cooked and thus 
not sufficiently soft the above leniency will not apply and they will 
still be subject to the prohibition of Tochen. (See Shmiras Shabbos 
K’Hilchaso Perek 6 footnote 21 quoting HaRav Shlomo Zalmen Auerbach 
Zatzal)
Additionally, this leniency only applies
 if the vegetable became soft due to cooking or another action; if it 
became soft on its own due to being overripe, such as an avocado, this 
leniency will not apply. (See Chazon Ish Siman 58:9. See also Shmiras 
Shabbos K’Hilchaso Perek 6:7.)
Halachos for Tuesday, June 7, 2011
(Triple Portion l’Kavod Chag HaShavuos)
Halachos for Tuesday, Erev Shavuos
1) It is permissible to spread fruit jam
 that has pieces of fruit in it, onto a piece of bread provided that the
 pieces of fruit are significantly soft (as is usually the case)
2) There is a debate amongst the Poskim 
if the prohibition of Tochen applies to  a fruit or vegetable which when
 mashed does not separate into individual pieces but rather just changes
 shape but remains one large mass.
An example of this is bananas and avocadoes, which when mashed do not separate, rather the entire mixture stays bound together.
The Chazon Ish (Siman 57 Dibur Hamaschil
 L’Inyan) rules that it is still subject to the prohibition of Tochen, 
and may not be mashed in the regular manner..
Rav Moshe Feinstein Zatzal (Igros Moshe 
Orach Chaim Vol. 4 Siman 74;Tochen:2) rules that they are not subject to
 the prohibition of Tochen and may be mashed in the regular manner.
It is best to be stringent and mash these fruits in an irregular manner (as we shall discuss shortly)
Halachos for Wednesday, first day of Shavuos
1) Foods that do not grow from the 
ground, such as meat, eggs, cheese etc., are not subject to the 
prohibition of Tochen and may be cut into very small pieces [for human 
consumption]. (Shulchan Aruch Siman 321:9)
However, if cutting up meat, or other 
foods that do not grow from the ground, to feed an animal that would 
otherwise be unable to eat the large pieces, it is indeed subject to the
 Melacha of Tochen, and only permitted immediately before feeding them. 
(Rama ibid. See also Mishna Berura S”K 33 and 34 that some Poskim rule 
leniently and allow it in all situations.)
2) The leniency of permitting to cut non
 growing items to be cut as small as desired is only when they are being
 cut by hand or with a knife.
However, a specialized utensil (e.g. egg
 or cheese slicer, meat tenderizer, grater etc.) may not be employed to 
cut these foods, as doing so is a transgression of “Uvda D’Chol, weekday
 activity”. (See Mishna Berura Siman 321:36)
Halachos for Thursday, second day of Shavuos
1) Usually in regard to Melachos of 
Shabbos, if one transgressed them in an unusual manner (Shinui) although
 it would not be a biblical transgression, there would still be a 
rabbinical transgression.
However, in regard to the Melacha of 
Tochen, Chazal teach us that if it is done in an unusual manner, the 
Melacha has not been transgressed at all, even rabinically. (See Talmud 
Shabbos 141a and Tosefta Beitza Perek 1 quoted in Bais Yosef  Siman 321)
2) One who grinds a spice into a powder 
on Shabbos using a mortar and pestle, a spice mill or a similar device 
which is usually used to grind spices, has transgressed the biblical 
transgression of Tochen. (See Rambam Hilchos Shabbos Perek 8 Halacha 15 
and Mishna Berura Siman 321:23)
However, if one grinds the spice using 
the back of a knife or fork and grinds it onto the table or into another
 non specialized dish, it is permitted, provided that the spices being 
ground are for use for this Shabbos. (Shulchan Aruch Siman 321:7 and 
Mishna Berura S”K 24)
The same principle applies to all fruits
 and vegetables, and if they are cut up using a Shinui, an irregular 
manner, such as doing it with the back of a knife or spoon it is 
permissible to cut them up or crush them into very small pieces.
Halachos for Erev Shabbos Kodesh, June 10, 2011
(Double Portion L’Kavod Shabbos Kodesh)
Halachos for Erev Shabbos Kodesh
1) An item which was already ground up is no longer subject to the prohibition of being ground up again.
Thus, breads, cakes, cookies and similar
 items, which are made from wheat which was already ground up into 
flour, may be ground up into crumbs on Shabbos. (See Rama Siman 321:12 
and Biur Halacha Dibur Hamaschil Lefarer)
2) The grinding up of a previously ground item may even be done with the assistance of a fork or knife. (ibid.)
However, this should not be done with a 
specialized grinding utensil as utilizing such a utensil is considered 
“Uvda D’Chol, a weekday way of doing things” (ibid.)
Halachos for Shabbos Kodesh
1) A sugar cube may be ground up to 
produce loose sugar, as the cube was originally loose sugar, and thus no
 longer subject to the prohibition of Tochen.
Likewise, salt or sugar which, due to 
the moistness in the air, hardened into a clump may be ground up and 
returned to its original loose state.
However, they may only be ground back 
into the state from which they started (i.e. regular salt/sugar 
crystals) but may not be further ground up to make them finer and more 
powdery than they originally were as doing so would be a prohibition of 
Tochen.
2) Dried mud or similar grime that got 
stuck to ones shoes or clothing may not be scraped off on Shabbos as 
doing so may cause the mud to be ground up. (See Shulchan Aruch Siman 
302:7)
In extreme circumstances where not 
removing the mud will be an issue of “Kavod Habriyos, affecting the 
human dignity of the wearer” a non-Jew may be asked to remove the 
offending matter from the shoes or clothing. (See Mishna Berura Siman 
302:36 and Sha’ar HaTziyun Os 44)
Tam V’Nishlam.
With gratitude to Hashem Yisborach, this brings us to the end of our foray into Hilchos Tochen.