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Fine-Tip Tweezers: One Steel Strip Bent and Spring-Tempered
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14. Ukwakira 2026NO
25
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Fine-Tip Tweezers: One Steel Strip Bent and Spring-Tempered

Tweezers are two springy arms joined at one end: pressed, the tips close; let go, the spring opens them. They go back to predynastic Egypt. Make them from one strip of tool steel bent in half, temper it to a spring, and file the tips to fine needle points that meet exactly. The picture: Roman tweezers, one strip bent at a loop, with a sliding ring.
Hagati
Half a day

Amabwiriza

1

Draw the strip

Draw tool steel to a strip about 8 mm wide, 0.8 mm thick and 21 cm long (our size), tapering both ends.

Ibikoresho by'iyi ntambwe:

Inkoni iringaniye y'icyuma cy'ibikoreshoInkoni iringaniye y'icyuma cy'ibikoresho1 igice
AmakaraAmakara1 as required

Ibikoresho bikenewe:

Uruganda rw'umucuziUruganda rw'umucuzi
IngoyiIngoyi
Inyundo ifite umutwe utambitseInyundo ifite umutwe utambitse
Amafashi y'umucuziAmafashi y'umucuzi
2

Bend it in half

Anneal, then bend the strip in half round a small rod so the arms spring apart with the tips about 6 mm open. Square the arms in the vise.

Ibikoresho bikenewe:

Ifatiro ry'AmezaIfatiro ry'Ameza
Inyundo ifite umutwe utambitseInyundo ifite umutwe utambitse
Uruganda rw'umucuziUruganda rw'umucuzi
3

Shape the tips

File the ends to long, fine points with the needle files, and dress the inner faces so the tips meet along the last few millimetres. Check under the loupe.

Ibikoresho bikenewe:

Ikusanyirizo ry'Amakariso MatoIkusanyirizo ry'Amakariso Mato
Ikariso ry'IcyumaIkariso ry'Icyuma
Lupu YaguraLupu Yagura
4

Harden and spring-temper

Heat to cherry red and quench in oil, polish, then temper to blue so the arms spring back (our temper).

Ibikoresho bikenewe:

Uruganda rw'umucuziUruganda rw'umucuzi
Indobo yo gukonjeshaIndobo yo gukonjesha
Amavuta yo gukataAmavuta yo gukata
Amafashi y'umucuziAmafashi y'umucuzi
5

Finish the points

Hone the tips lightly on the stone and check that they close evenly without crossing.

Ibikoresho bikenewe:

Ibuye ryo gutyaza rya grit 1000Ibuye ryo gutyaza rya grit 1000
Lupu YaguraLupu Yagura
6

Closing force

Gupakira ikaye ya Jupyter…

Ibikoresho

2

Ibikoresho bikenewe

11

Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

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