Tuesday, March 13, 2018



I am upgrading my own air hammer to a heavier weight, both built by David Robertson of Hammer & Tongs Studio. (go here for description)

To that end, I (HAVE SOLD) my current air hammer (Imperial measurements) :

50 lb head weight
• built on ABANA 'lift / drop' system (by R. Kinyon)
• requires separate (larger) compressor

This video shows me working on railing elements using this air hammer

This hammer is 'rated' for working up 1 1/2 x 1 1/2 inch stock.
I have worked material as large as 1 1/2 x 4 (admittedly - slowly!)

click for larger views for all images

Side view
3/4 view
front view
• Base plate = 30 deep x 22 wide• Total frame height = 88
• Total weight (approximate) 450 lbs

Closer view of working area - plastic safety shield down
- working height = 33 1/2 (floor to top of lower die)
- throat clearance = 12  (back edge of die to frame gap)
- die size = 3 1/2 x 1 1/2
- total stroke height = 9 inches
(note effective working gap between the dies is really about 4 inches)

close up of the die set up
The dies are currently set up with the bottom die having the rear half with rounded edges (to act more effectively for drawing out) See the close up image.

- head block = 4 x 4 x 10 inches
- cylinder type = heavy duty hydraulic (replaced the original lighter duty air type)
- cylinder shaft diameter = 1
- cylinder interior diameter = 2
- supply hose length = 5 feet (as existing - from compressor)
- foot peddle type control, on roughly 4 foot hose (to allow for standing back when working longer bars)


- input air control (water trap, gauge, oiler)
- full air lines (compressor to hammer)

additional die blocks made to fit this machine:
- 'Hoffi' style bottom 1/2 crown die (for spreading, seen used above)
- centre mount 'hardie hole' die block for one inch (would allow use of existing anvil hardie tools)
- centre shaft bottom die to front hardie hole (fits above)
- bolt in place front hardie hole attachment

This machine is basically 'plug and play' - fully working and ready to go.

- Requires a larger (40 gallon / 2 HP) air compressor for input air
- Air flow required is 10 cu/ft/min @ 90 PSI

It may be possible to take some of the pieces apart. Originally the bottom die block section bolted into place. This has been re-enforced with some welding - which likely could be separated with an angle grinder / zip disk. This support is made of two pieces of square tube, which I had filled with lead shot to improve the stability of the machine.

I have the machine mounted on a raft made of 4 lengths of rail tie, each four foot long. This sitting on top of four inches of sand. (All dug in to ground level).


(posting retained for history!)

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February 15 - May 15, 2012 : Supported by a Crafts Projects - Creation and Development Grant

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