Electronics diagonal cutters

Electronics diagonal cutters (kìm cắt cạnh điện tử) from KNIPEX in this product group are used for cutting component leads and small conductors during circuit assembly. The range covers 48 codes from the 76 series and the 77 series, spread across three directions: standard versions, ESD anti-static versions, and carbide alloy blade versions marked H. Common overall lengths are 115 mm, 120 mm and 130 mm.

Head shapes include round with small bevel, round without bevel, pointed, flat pointed and mini pointed; some codes add a wire-end holding feature. Laser-hardened cutting edges reach at least 62 HRC, while the Knipex 76 series uses induction hardening at 63 HRC. The article below examines box joint construction, handles, how to select by wire diameter, and the carbide application group for piano wire, nickel wire and tungsten wire. Goods imported from the Federal Republic of Germany, warranty according to manufacturer policy.

Electronics diagonal cutters (kìm cắt cạnh điện tử) serve the cutting of component leads and small conductors in circuit assembly. The product group here brings together KNIPEX codes from the 76 series and the 77 series. The range includes standard versions, ESD anti-static versions, and carbide alloy blade versions marked H. Common lengths within the group are 115 mm, 120 mm and 130 mm. Many codes use a play-free box joint, helping the cutting edges keep a stable position when opening and closing.

Head shapes vary: round with small bevel, round without bevel, pointed, flat pointed and mini pointed. Some codes add a wire-end holding feature, limiting cut wire ends from flying off. The cutting edges on many codes are laser-hardened with a minimum hardness of 62 HRC. The Knipex 76 series has induction-hardened cutting edges reaching 63 HRC. Handles come in a non-slip plastic version and a multi-component version. On the ESD codes, the handles allow static energy to discharge gradually.

This characteristic suits work close to components sensitive to static electricity. The SB suffix on a code indicates hanging pack packaging. The carbide codes target hard or tough materials such as piano wire, nickel wire, tungsten wire and diode wire. This page arranges the products by construction, head shape and cutting capacity. Users should check the maximum wire diameter before choosing a code.

Each code links to its own detail page for full specifications.

Construction and materials

Most codes in the group share the same construction principles: play-free box joint, load-optimised design and non-slip handles. The box joint keeps the two cutting edges aligned when closed, limiting misalignment. The load-optimised design gives a more direct feel when squeezing the handles. Many codes have mirror-polished heads, for example the 77 series used in electronics.

Regarding cutting edge hardness, 77 01 115 and 77 22 115 SB are recorded with laser-hardened edges of at least 62 HRC. The Knipex 76 series uses induction-hardened edges reaching 63 HRC, handling fine wires and small components. Code 77 02 115 has a rust-protected surface treatment. Code 77 02 130 is mirror chrome-plated, with a play-free box joint and a high force transmission ratio.

ESD anti-static series

Codes with the ESD suffix use static-dissipative handles. Static energy is discharged through the handles gradually rather than in a sudden release. This arrangement serves work on circuit boards and sensitive semiconductor components. Many ESD codes in the group have a length of 115 mm or 130 mm, together with mirror-polished heads and multi-component handles.

In the 115 mm group, 77 01 115 ESD and 77 02 115 ESD both use a round head with small bevel. Code 77 02 115 ESD is 117 mm long, cutting soft wire up to Ø1.6 mm, medium-hard wire Ø1.2 mm and hard wire Ø0.6 mm. Code 77 22 115 ESD uses a round head without bevel for cutting flush to a surface. Code 77 42 115 ESD uses a pointed head without bevel.

In the 130 mm group, Knipex 77 ESD and 77 02 130 ESD keep the round head with small bevel together with a play-free box joint. Code 77 32 130 ESD has a pointed head with small bevel, cutting soft copper wire Ø0.3–2.0 mm, medium wire up to Ø1.3 mm and hard wire up to Ø0.6 mm. Codes 77 42 130 ESD and 77 82 130 ESD both cut flush to a surface.

Carbide alloy cutting edges

Four codes carrying the H marking in this group use carbide alloy cutting edges, with an overall length of 120 mm. This group targets hard or tough materials commonly found in the electronics sector. The documentation lists piano wire, nickel wire, tungsten wire and diode wire. Where work is repeated many times on these wire types, carbide edges are provided separately in place of conventional steel edges.

The non-anti-static versions comprise 77 02 120 H with a round head and 77 32 120 H with a pointed head. The corresponding anti-static versions comprise 77 02 120 H ESD and 77 32 120 H ESD. The ESD pair suits work areas requiring static control. All four codes share the same length, so hand handling is fairly similar, with the difference lying in head shape.

Head shapes and wire-end holding

Head shape determines access to the cutting position on a circuit board. A round head with small bevel is used for common component lead cutting. A head without bevel allows flush cutting to a surface. Pointed and mini pointed heads reach into narrow gaps between closely placed components. A flat pointed head serves wires of smaller diameter, with correspondingly lower cutting limits.

Examples of pointed heads with small bevel include 77 32 115 ESD and 77 32 115. A flat pointed head is found on 77 52 115 ESD, cutting soft copper wire Ø0.3–1.0 mm and hard wire up to Ø0.5 mm. A mini pointed head is found on 77 72 115 ESD. The group with a wire-end holding feature comprises 77 12 115 ESD, 77 12 115 ESDSB and 77 12 115 SB.

Choosing a code according to your needs

The first step is to determine the diameter and hardness of the wire to be cut. Then choose the head shape according to the working space on the circuit board. If the work area is static-controlled, give priority to codes with the ESD suffix. If the wire is of the hard or tough type, consider the four 120 mm carbide-edged codes. A length of 115 mm or 130 mm depends on reach and gripping habits.

As for packaging, codes with the SB suffix are supplied in hanging pack form, for example 77 01 115 SB, 77 02 115 SB, 77 02 130 SB and 77 32 115 SB. Versions without a suffix comprise 77 11 115, 77 21 115 N, 77 41 115, 77 22 115, 77 12 115 and 77 32 130.

You can open each detail page to compare length, head shape and wire diameter limits. If you need advice on selecting a code according to material and working environment, please get in touch for support.