İskarpelayı kullandığım sırada talaş eldivenime doldu.

Because it is the definite direct object of kullanmak.

Turkish often adds the accusative ending to a specific direct object:

• iskarpela = chisel
• iskarpela-y-ı = the chisel

The y is a buffer consonant, added because the noun already ends in a vowel. The final -ı is chosen by vowel harmony.

So iskarpelayı kullandığım sırada means while I was using the chisel, not just while I was using a chisel in a vague sense.

Kullandığım comes from kullanmak, meaning to use.

It breaks down roughly like this:

• kullan- = use
• -dık / -dik / -duk / -dük = a participle suffix
• -ım = first-person agreement, meaning my / that I

Because of sound changes, it appears as kullandığım.

This form does not work like a simple English tense. It means something like:

• that I used
• that I was using
• that I use

The exact meaning depends on context. Here, with sırada, it means while I was using.

Yes, sıra often means row, order, or turn. But in the expression -dığı sırada, it means at the time when or while.

So:

• kullandığım sırada = during the time that I was using it
• more naturally, while I was using it

This is a very common Turkish time expression.

Yes, absolutely.

A very natural alternative is:

• İskarpelayı kullanırken talaş eldivenime doldu.

Both versions mean basically the same thing:

• kullanırken = while using
• kullandığım sırada = at the time when I was using

The version with -dığı sırada can sound a little more descriptive or formal, but both are normal.

Because dolmak takes the dative case for the place something fills or enters.

Breakdown:

• eldiven = glove
• eldivenim = my glove
• eldivenime = into my glove / to my glove

So:

• talaş eldivenime doldu = the shavings filled my glove / got into my glove

If you said eldivenimi, that would be the accusative form, which would make my glove a direct object. That does not fit dolmak here.

Dolmak is an intransitive verb meaning to fill up, to become full, or in some contexts to get into and fill.

So:

• talaş eldivenime doldu means the shavings got into the glove and filled it

Compare:

• girdi = entered
• doldu = entered and filled up
• doldurdu = filled something, with an agent doing the filling

So doldurdu would suggest that someone or something actively filled the glove. Doldu is the natural choice if the shavings themselves ended up filling it.

Talaş usually means wood shavings, sawdust, or similar fine wood debris, depending on context.

It is often treated like a mass noun, so Turkish does not need a plural ending here. A bare singular noun can refer to the material collectively.

So talaş here means something like:

• wood shavings
• sawdust
• wood dust

Even though English often uses a plural form like shavings, Turkish commonly just uses talaş.

The sentence is built like this:

• İskarpelayı kullandığım sırada = while I was using the chisel
• talaş = wood shavings / sawdust
• eldivenime = into my glove
• doldu = filled / got in

So the pattern is:

• time clause
• subject
• destination or container
• verb

This is very natural in Turkish. The verb normally comes at the end, and the time expression often comes near the beginning to set the scene first.