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Air Blower: a Hand-Cranked Fan Blow-Bellows for a Portable Forge (Hasluck, 1904)
P. N. Hasluck (ed.) · Public domain
Forge

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4. Novemba 2026NO
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Air Blower: a Hand-Cranked Fan Blow-Bellows for a Portable Forge (Hasluck, 1904)

An air blower gives a fire a steady stream of air. Hasluck's Smiths' Work (1904) shows a small one for a home-made forge: a brass box with a four-winged tin fan on an iron spindle, spun fast by a hand wheel pressing on a rubber-covered roller. Unlike old bellows it blows continuously, through an outlet 2 1/2 in wide and 3/4 in deep. The book's drawings carry no sizes for the box, so its size, the sheet thickness and the metals of the wire and the plate are unknown here; the tools are ours. Source: P. N. Hasluck, Smiths' Work (1904), pp. 140-143, Figs. 202-211. Picture: their Figs. 203-204.
Kati
Two days

Maagizo

1

Read Hasluck

"When this is all done, turn the handle rapidly; the fan inside will then revolve at a good rate, and a strong draught will be obtained."
2

Cut out the box

Cut the two sides and the bottom of the box from sheet brass, and a piece for the top covering, but do not join them yet. Hasluck gives no sizes for the box (unknown); its outlet is to be 2 1/2 in wide and 3/4 in deep.

Vifaa kwa hatua hii:

Bamba la Shaba ya NjanoBamba la Shaba ya Njano1 sides, bottom and covering

Zana zinazohitajika:

Mkasi wa batiMkasi wa bati
Vipimo visivyojulikanaVipimo visivyojulikana
3

Make the fan

Make the iron spindle (Figs. 204, 205). Drill two holes in each of its four sides, one at each end, tap them, and screw in pieces of wire about 5/16 in long. Cut four pieces of tin, a little narrower than the box, and punch holes in them to match. Slip each wing over its wires, put a washer over each wire and rivet it over. Five or six wings may be used; then solder pieces of wire between them to stiffen them (Fig. 211).

Vifaa kwa hatua hii:

Fimbo ya chumaFimbo ya chuma1 spindle
Metali isiyojulikanaMetali isiyojulikana1 wire
Bamba la batiBamba la bati1 four wings
Washa bapaWasha bapa8 vipande

Zana zinazohitajika:

Kekee cha mkonoKekee cha mkono
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Msumeno wa chumaMsumeno wa chuma
Mkasi wa batiMkasi wa bati
Nyundo ya rivetiNyundo ya riveti
Chuma cha kulehemiaChuma cha kulehemia
4

Fit the spindle and close the box

Screw the brass bearings (Fig. 206), a ring with three spokes and a hole in the middle, to the two sides. Fit the iron spindle in the bearings, screw the sides and bottom together, then screw the covering over the top.

Vifaa kwa hatua hii:

Bamba la Shaba ya NjanoBamba la Shaba ya Njano1 two bearings
Skrubu za mashineSkrubu za mashine1 seti

Zana zinazohitajika:

Kekee cha mkonoKekee cha mkono
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
5

Fit the hand wheel

The wheel has to be bought. Turn a brass spindle for it (Fig. 207), thread it at each end and fix it with a nut to a plate (Fig. 208); put on the wheel, hold it with a washer and another nut, and fit the knob on rather loosely. Before fixing the wheel, turn a small piece of wood (Fig. 209), put an india-rubber band over it and screw it onto the projecting end of the iron spindle. Fix the wheel so it presses tightly against this roller. Instead, both wheels may be grooved and driven by a band.

Vifaa kwa hatua hii:

Gurudumu la mkono la chumaGurudumu la mkono la chuma1 kipande
Ufito wa shaba ya njanoUfito wa shaba ya njano1 wheel spindle
Metali isiyojulikanaMetali isiyojulikana1 plate
Nati ya pembe sitaNati ya pembe sita2 vipande
Washa bapaWasha bapa1 kipande
Ubao wa mbaoUbao wa mbao1 roller
Mipira ya kufungaMipira ya kufunga1 kipande

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
Kekee cha mkonoKekee cha mkono
6

Fit the nose-piece

Cut the nose-piece from sheet brass to the pattern (Fig. 210) and bend it at right angles along the dotted lines so it fits over the outlet end of the box. Rivet or solder its two edges together, drill it and screw it on. Turn the handle quickly to test the draught.

Vifaa kwa hatua hii:

Bamba la Shaba ya NjanoBamba la Shaba ya Njano1 nose-piece

Zana zinazohitajika:

Mkasi wa batiMkasi wa bati
Chuma cha kulehemiaChuma cha kulehemia
Kekee cha mkonoKekee cha mkono
Miwani ya usalamaMiwani ya usalama
7

History and honest limits

Hasluck's "Home-made Portable Forges" chapter offers this fan as a cheaper, steadier alternative to the old leather bellows, costing about half as much. He adds that gun-metal is better than brass for all parts except the covering and nose-piece. The drawings carry no sizes, so the box size, the sheet thickness and the metals of the wing wires and wheel plate are unknown; the tools are ours.

Vifaa

11

Zana Zinazohitajika

9

Mchoro huu unatengeneza

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