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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.
中级
Half a day
说明
1
1
Draw the strip
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.
此步骤所需材料：
工具钢扁钢1 个
木炭1 as required所需工具：
铁匠炉
铁砧
横向楔头锤
铁匠钳2
2
Bend it in half
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.
所需工具：
台虎钳横向楔头锤铁匠炉3
3
Shape the tips
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.
所需工具：
什锦锉套装
金属锉
放大目镜4
4
Harden and spring-temper
Harden and spring-temper
Heat to cherry red and quench in oil, polish, then temper to blue so the arms spring back (our temper).
所需工具：
铁匠炉
淬火水桶
切削油铁匠钳5
5
Finish the points
Finish the points
Hone the tips lightly on the stone and check that they close evenly without crossing.
所需工具：
1000 目磨刀石放大目镜6
6
Closing force
Closing force
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