DD Knockers (Hammer head only)
For Bigger, Benter Blades that need extra Percussive Persuasion
“If your blade is a rockin’, the NIROC comes a knockin'”
Weighing in at approximately 160 grams (5.6 oz) the Niroc DD Knocker was requested by many Japanese style blade smiths. The double diagonal peen head allows you to more forcefully direct where you want the steel to move. They are also useful for blade and fitting texturing.
The diagonal peen is approximately 8mm or 5/16″ long and has a reasonably aggressive radius as supplied. The intention is that the user will customise the ends to their intended use. This can be done on a belt grinder with an old ceramic belt and a bit of patience. They can of course be used as supplied.
These are hand made and every effort and care is made to create a beautiful tool that, with care, will last. The heads are machined from brass bar. Brass is selected due to its relative density being heavier than steel for the same volume and its ability to deform. This “beds” the carbide and reducing the likelihood of chipping or fracturing. The carbide inserts are silver brazed in place with 45% silver brazing alloy, and the process I use ensures the brazing completely retains the insert.
The eye of my hammers is integral to the design and retention of the head on a handle, whether fitted by me or by you. I machine the eye with an hourglass taper, meaning the width of the eye is narrower in the middle of the hammer. When driven onto a tapered handle and wedged, the likelihood of it ever coming loose is slim to none.
The Carbide ends are brazed in at an angle that allows the user to move material in 180 degree opposing directions simply by rotating the hammer in the hand.