Bolsters are a design element of a knife, which is designed to distribute bending mechanical loads that occur at the junction of the knife handle and blade.
For the manufacture of bolsters, as a rule, hard and durable materials are used, such as: metals (copper alloys / brass, bronze, cupronickel /, stainless steel, titanium, aluminum alloys, etc.), non-prickly and hard woods, horns / bones /animal teeth, as well as various hard plastics (polyester, acrylic, bakelite, etc.).
Stainless steel is the most practical material for bolsters. Stainless steel is relatively cheap, polishes well, is more resistant to mechanical damage (scratches, dents, matting, etc.) than copper-based non-ferrous metal alloys (brass, bronze, cupronickel). In addition, stainless steel does not form a galvanic pair with the blade and, accordingly, does not cause corrosion at the point of contact between the structural parts of the knife. Stainless steel, as a rule, fits well into any knife design because it is close to the blade in color shades and has a neutral character in the inlay of the handle.
The blank for the bolster is made of stainless steel grade 04X18H9 (AISI 304) and is an ellipse, along the contour of which you can easily adjust the adjacent handle. Since the material of the handle is usually much softer than stainless steel, when fitting with sanding, it is recommended to apply it (sanding) to a hard base in order to avoid parasitic sampling on the handle at the junction with the bolter.
The blanks are presented in the form of the two most popular form factors 24x16mm and 34x22mm, which are often used when mounting hunting knives and fins. The slot in the blank of the 12x3mm and 12x2mm bolster will also fit the shanks of most blades used for flush mounting.
There is a version of the bolster without a slot, which can be used in any non-standard case.
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