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Stone Carving Chisels: Mallet-Headed Plain and Tooth Chisels and Points for Soft Stone (Holford, 1907)
H. Holford · Public domain
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4. Novemba 2026NO
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Stone Carving Chisels: Mallet-Headed Plain and Tooth Chisels and Points for Soft Stone (Holford, 1907)

Soft stone such as limestone and sandstone is cut with chisels struck by a wooden mallet, so their heads are broad and a little rounded. H. Holford's 20th Century Toolsmith and Steelworker (1907) shows a set: plain chisels, tooth chisels with a row of sharp teeth, and points, forged from 3/4 inch octagon steel of 75 points carbon and tempered a very pale blue. He gives no lengths, widths or tooth spacing; those are unknown here. The brine bath is from his chapter on the hardening bath. Source: H. Holford (1907), pp. 21, 131-133, 140-141. Picture: his Fig. 71.
Kati
A day for a set

Maagizo

1

Read Holford

"In cutting soft stone of any description wooden mallets are used, consequently the heads of the tools are made broad and a little rounding, so as not to cut or bruise the mallet."
2

Forge the mallet heads

Use 3/4 inch octagon steel of 75 points carbon. For each tool, upset the head end a little, fuller it in, draw it out, then swage it to its broad, slightly rounded shape between top and bottom swages (Fig. 78). For a narrow chisel, forge the head first; for a wide one, forge the cutting end first. Sizes are not given (unknown).

Vifaa kwa hatua hii:

Kipande cha pembe nane cha feleji ya zanaKipande cha pembe nane cha feleji ya zana1 3/4 in octagon

Zana zinazohitajika:

Jiko la KufuaJiko la Kufua
FuaweFuawe
Nyundo ya mhunziNyundo ya mhunzi
Gari la KuburutaGari la Kuburuta
Fuller (chombo cha kuchora mifereji)Fuller (chombo cha kuchora mifereji)
Swaji za juu na chiniSwaji za juu na chini
Koleo za mhunziKoleo za mhunzi
Vipimo visivyojulikanaVipimo visivyojulikana
Miwani ya usalamaMiwani ya usalama
Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto
3

Forge the chisels and points

For a wide chisel, upset the end to the width of the chisel before drawing it down to a thin cutting edge. Hammer the flat surfaces. Draw the points down to almost a square point (Fig. 72). For tooth chisels, punch the teeth into the edge in a punch machine after the flat surfaces have been hammered, then file each tooth to an extremely sharp point.

Zana zinazohitajika:

Jiko la KufuaJiko la Kufua
FuaweFuawe
Nyundo ya mhunziNyundo ya mhunzi
Koleo za mhunziKoleo za mhunzi
Mkandamizo wa kutoboaMkandamizo wa kutoboa
Tupa lainiTupa laini
4

Harden the chisels

Heat the cutting edge very evenly along its whole length and dip it at least one inch into the hardening bath (clean water, best as a strong brine, kept large and cold). Polish it bright by rubbing it across a board spread with fine clean sand near the forge, and draw the temper to a very pale blue, the right temper for all limestone tools.

Zana zinazohitajika:

Jiko la KufuaJiko la Kufua
Myeyusho wa chumvi uliojaaMyeyusho wa chumvi uliojaa
UbaoUbao
Mchanga lainiMchanga laini
Koleo za mhunziKoleo za mhunzi
Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto
5

Harden the points

Dip the points deep into the bath. Draw the temper so it shows at least 5/8 inch back from the point; if it runs so fast that only the very tip is tempered, the point bends and breaks easily.

Zana zinazohitajika:

Jiko la KufuaJiko la Kufua
Myeyusho wa chumvi uliojaaMyeyusho wa chumvi uliojaa
UbaoUbao
Mchanga lainiMchanga laini
Koleo za mhunziKoleo za mhunzi
Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto
6

History and honest limits

Holford sets the soft-stone tools apart from those for granite and marble: soft stone takes wooden mallets, hence the broad heads, and a very pale blue temper. The finest stone carvers' tools, struck only lightly, he hardens without drawing any temper at all. He gives no lengths, widths or tooth spacing; the tools used to make them are ours.

Vifaa

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Zana Zinazohitajika

15

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Stone Carving Hammer: a Granite Cutters' Mash Hammer (Holford, 1907)

Stone Carving Hammer: a Granite Cutters' Mash Hammer (Holford, 1907)

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