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Weighing in at approximately 160 grams (5.6 oz) the Niroc Knockometer was originally designed as a blade straightening tagane hammer, but they are also prized by panel beaters, tool makers, leather workers, saw doctors and tool repairers. They are useful to anyone that needs a small, but very hard hammer.
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When concrete shrinks due to drying out, high tensile stress levels develop around proportionally oversized reinforcing. These stresses cause cracks that run along the length of the steel. Smaller diameter reinforcing has less of an effect on the concrete, so the same amount of concrete shrinkage develops much less tensile forces, thus the likelihood of cracks caused by the steel itself drops dramatically.
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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.
If you have any questions or want steel cut to a specific size, please email lawrence@maritimeknifesupply.ca or Call 902-691-2409
To use - place a 9mm plywood sheet and a 6mm fibre cement board on top of the cabinets carcass. The cement boards should be cut flush to the edge of the cabinets. The forms will then be screwed into the cement board with 12mm x 10g Panhead screws. After the concrete is poured, the forms are snapped off along the designated 'breakpoint' to reveal a beautiful clean edge.
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Our recommendation is use a fibreglass based composite scrim or bar instead to prevent rust issues, ghosting and telegraph cracking.
Concrete benchtops that are made with rebar that is too large in scale for the slab thickness are susceptible to telegraph cracking.
Because all concrete shrinks to some degree and shrinkage occur over a long period of time, the occurrence of telegraph cracking may not appear until long after a countertop is installed.
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 Back edge form is designed to be used where a bench top is against a wall. The form remains in place and provides a useful guide to get a flat and level bench top