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Secateurs: Forged Bypass Pruning Shears with a Spring and Catch
Unknown authorUnknown author (Wikimedia Commons) · Public domain
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14. Oktoba 2026NO
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Secateurs: Forged Bypass Pruning Shears with a Spring and Catch

Secateurs, credited to Bertrand de Molleville around 1813, are one-hand shears for live wood. The bypass kind has a sharp blade that slides past a hooked counter-blade like scissors, cutting cleanly without crushing; a spring opens the handles and a catch holds them shut. Forge the two halves, harden the blade, rivet the pivot, and fit the spring and catch. The picture: 19th-century secateurs with a leaf spring between the handles, from Baltet's L'art de greffer.
Juu
Two days

Maagizo

1

Forge the halves

Forge two halves from tool steel: one with a curved cutting blade, one with a thicker hooked counter-blade, each with a flat boss for the pivot and a handle about 15 cm long (our size).

Vifaa kwa hatua hii:

Kipande cha pembe nane cha feleji ya zanaKipande cha pembe nane cha feleji ya zana0.5 kg
MkaaMkaa3 as required

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
FuaweFuawe
Nyundo yenye kichwa cha msalabaNyundo yenye kichwa cha msalaba
Koleo za mhunziKoleo za mhunzi
Glavu za kulehemuGlavu za kulehemu
Miwani ya usalamaMiwani ya usalama
2

Fit and rivet

Anneal, file the inner faces of the blades flat so they slide close past each other, drill the bosses and rivet them with a firm but free pivot.

Vifaa kwa hatua hii:

Rivet za chuma cha puaRivet za chuma cha pua1 kipande

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
Tupa ya chumaTupa ya chuma
Kibano cha meza ya kaziKibano cha meza ya kazi
Kekee cha mkonoKekee cha mkono
Nyundo yenye kichwa cha msalabaNyundo yenye kichwa cha msalaba
3

Harden the blade

Grind a single bevel on the cutting blade, harden it in water and temper to a straw colour; leave the counter-blade softer.

Vifaa kwa hatua hii:

MajiMaji10 lita

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
Ndoo ya kupoza chumaNdoo ya kupoza chuma
Koleo za mhunziKoleo za mhunzi
Glavu za kulehemuGlavu za kulehemu
Miwani ya usalamaMiwani ya usalama
4

Spring and catch

Forge a V-shaped leaf spring from flat tool steel, leave it springy, and rivet its legs inside the handles. Bend a wire loop on one handle that hooks over the other to hold the shears closed.

Vifaa kwa hatua hii:

Kipande bapa cha feleji ya zanaKipande bapa cha feleji ya zana1 kipande
Rivet za chuma cha puaRivet za chuma cha pua2 vipande
Waya wa chumaWaya wa chuma0.2 m

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
Nyundo yenye kichwa cha msalabaNyundo yenye kichwa cha msalaba
Kekee cha mkonoKekee cha mkono
Koleo la Mdomo BapaKoleo la Mdomo Bapa
5

Sharpen

Hone the bevel only, never the flat face, and check the blades meet without a gap along the cut.

Zana zinazohitajika:

Jiwe la kunoa la grit 1000Jiwe la kunoa la grit 1000
6

Cutting force near the pivot

Inapakia daftari la Jupyter…

Vifaa

6

Zana Zinazohitajika

12

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