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Slotted Machine Screws Turned from Round Bar
Forge

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Forge

11. Ukwakira 2026NO
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Slotted Machine Screws Turned from Round Bar

Small machine screws with a slotted cheese head are turned from round bar: the head is the bar's own diameter, the shank is turned down and threaded, and a slot is sawn across the head. The example is M4 to ISO 1207: head 7 mm across and 2.6 mm high, slot 1.2 mm wide and at least 1.1 mm deep.
Hagati
15 minutes per screw

Amabwiriza

1

Turn the head diameter

Chuck mild steel round bar and turn the end to 7 mm for a length of 20 mm more than the screw.

Ibikoresho by'iyi ntambwe:

Umurongo uziguye w'icyuma cyorohejeUmurongo uziguye w'icyuma cyoroheje0.2 metero

Ibikoresho bikenewe:

Imashini yo guhinguza icyumaImashini yo guhinguza icyuma
Igikoresho gifata cy'ibirenge 3 cy'imashini ihinguraIgikoresho gifata cy'ibirenge 3 cy'imashini ihingura
Icyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)Icyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
Amadarubindi y'umutekanoAmadarubindi y'umutekano
Amavuta yo gukataAmavuta yo gukata
2

Turn the shank

Turn the shank a little under 4 mm, leaving 2.6 mm of head plus the parting width. Chamfer the end.

Ibikoresho bikenewe:

Icyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)Icyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
3

Thread M4

With the lathe off, cut the M4 x 0.7 thread with the die and oil.

Ibikoresho bikenewe:

Agakoresho ko gukata imizingo y'ibyumaAgakoresho ko gukata imizingo y'ibyuma
Igifashi cyo guhindukiza umuyoboro wo hanzeIgifashi cyo guhindukiza umuyoboro wo hanze
Amavuta yo gukataAmavuta yo gukata
4

Part off

Part the screw off 2.6 mm behind the shank shoulder and round the head's edge with a file.

Ibikoresho bikenewe:

Icyuma cyo guca ku ruzigaIcyuma cyo guca ku ruziga
Amakariso MenshiAmakariso Menshi
5

Saw the slot

Hold the screw in soft vise jaws and saw a slot straight across the head, 1.2 mm wide and at least 1.1 mm deep. Deburr it.

Ibikoresho bikenewe:

Umucumita w'IbyumaUmucumita w'Ibyuma
Ifatiro ry'AmezaIfatiro ry'Ameza
Amakariso MenshiAmakariso Menshi
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
6

Troubleshooting

Machine screw troubleshooting.

Flow

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Ibikoresho

1

Ibikoresho bikenewe

12

Iki gishushanyo gikora

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Agateganyo

Ibitorezo by'imashini

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