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Iron Axle and Cams for a Trip Hammer, Forged from Wrought Iron
Forge

Created by

Forge

17. October 2026NO
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Iron Axle and Cams for a Trip Hammer, Forged from Wrought Iron

A trip hammer is raised by a cam and drops under its own weight. The cams are lugs on a revolving shaft turned by the water wheel; each one lifts the helve once a turn. Forge a wrought-iron axle with a squared middle and three curved cams that slide on and are wedged tight. The picture: our diagram, side and end view.
Advanced
Three days with a striker

Instructions

1

Weld up the axle

Bind wrought-iron bars into a faggot as long as the shaft, bring it to a welding heat, sprinkle with sand and weld it solid with a striker, a heat at a time along its length.

Materials for this step:

Wrought Iron BarWrought Iron Bar25 kg
Wrought Iron RodWrought Iron Rod1 m

Tools needed:

Blacksmith ForgeBlacksmith Forge
CharcoalCharcoal
Fine SandFine Sand
SledgehammerSledgehammer
Blacksmith HammerBlacksmith Hammer
Blacksmith TongsBlacksmith Tongs
AnvilAnvil
Welding GlovesWelding Gloves
Safety GlassesSafety Glasses
Leather ApronLeather Apron
2

Shape the axle

Leave the middle square for the cams and draw both ends round for the journals. Flatter the square true and file the journals smooth.

Tools needed:

Blacksmith ForgeBlacksmith Forge
FlatterFlatter
SledgehammerSledgehammer
Blacksmith TongsBlacksmith Tongs
AnvilAnvil
Metal FileMetal File
Welding GlovesWelding Gloves
Safety GlassesSafety Glasses
Leather ApronLeather Apron
3

Forge the cams

For each cam, forge a thick curved lug on a boss. Punch the boss and drift it square to slide over the axle's square.

Materials for this step:

Wrought Iron BarWrought Iron Bar6 kg

Tools needed:

Blacksmith ForgeBlacksmith Forge
Hot PunchHot Punch
DriftDrift
Hot Cut HardyHot Cut Hardy
SledgehammerSledgehammer
Blacksmith HammerBlacksmith Hammer
Blacksmith TongsBlacksmith Tongs
AnvilAnvil
Welding GlovesWelding Gloves
Safety GlassesSafety Glasses
Leather ApronLeather Apron
4

Fit and wedge

Slide the three cams onto the square at equal turns round the shaft, each lined up with the helve's tail. Drive iron wedges beside each boss until tight.

Materials for this step:

Wrought Iron RodWrought Iron Rod0.5 m

Tools needed:

Blacksmith HammerBlacksmith Hammer
Metal FileMetal File
AnvilAnvil
Welding GlovesWelding Gloves
Safety GlassesSafety Glasses
Leather ApronLeather Apron
5

Blows per minute

Loading Jupyter Notebook...

Materials

2

Tools Required

15

This blueprint makes

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Iron Axle

Free

56
0
1
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Iron Cam

Free

51
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1

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CC0 Public Domain

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