{"id":20020,"date":"2026-06-09T17:22:35","date_gmt":"2026-06-09T09:22:35","guid":{"rendered":"https:\/\/leeknives.com\/?p=20020"},"modified":"2026-06-09T17:52:36","modified_gmt":"2026-06-09T09:52:36","slug":"parts-of-a-knife-anatomy-guide","status":"publish","type":"post","link":"https:\/\/leeknives.com\/de\/parts-of-a-knife-anatomy-guide\/","title":{"rendered":"Parts of a Knife Explained: Complete Anatomy, Structure & Diagram"},"content":{"rendered":"
A knife is far more than handle and blade. Whether you\u2019re picking your first chef\u2019s knife, checking pocket knife builds for EDC, or ordering OEM knives wholesale, knowing knife parts lets you choose wisely and talk clearly with factories.<\/p>\n\n\n\n
Every knife shares the same fundamental structure: a Klinge<\/strong> that does the cutting, a Tang<\/strong> that provides structural integrity, and a handhaben<\/strong> that gives you control. Folding knives add a pivot<\/strong> Und sperren<\/strong>. Kitchen knives optimize for rocking and slicing. Survival knives prioritize brute strength.<\/p>\n\n\n\n
In this complete guide, we’ll break down every part of a knife with a labeled diagram, explain how each component affects performance, and show you how anatomy differs across knife categories.<\/p>\n\n\n\n
Flexibility takes priority over belly geometry<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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OEM Spec Note<\/strong> Belly curvature is defined by the belly radius<\/strong> (the imaginary circle the edge curve follows). German profiles use a belly radius of 80\u2013120 mm<\/strong>; Japanese profiles use 150\u2013250 mm<\/strong>. When specifying OEM kitchen knives for European buyers, target a belly radius of 90\u2013110 mm<\/strong> \u2014 this matches the rocking-dominant cutting style preferred in most European commercial kitchens.<\/p>\n<\/blockquote>\n\n\n\n
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Cost & Margin Note<\/strong> A deep belly profile requires 20\u201330% more grinding time<\/strong> than a flat profile on the same blank, because more steel must be removed to create the continuous curve. For high-volume OEM lines (>5,000 units), specify a moderate belly radius (100\u2013130 mm)<\/strong> to balance cutting performance with line efficiency.<\/p>\n<\/blockquote>\n\n\n\n
Spine \/ Back<\/h3>\n\n\n\n
Der spine<\/strong> (or back<\/strong>) is the unsharpened top edge of the blade. It is the thickest part of the blade cross-section and provides the structural rigidity that prevents the blade from flexing or breaking under load. On kitchen knives, the spine is the surface your non-knife hand presses against when guiding the blade through dense materials.<\/p>\n\n\n\n
How It Performs<\/strong> Spine thickness is a direct proxy for blade strength. A thin spine (1.5\u20132.5 mm) reduces weight and drag, making the knife agile for fast prep work. A thick spine (4\u20136 mm+) enables batoning (splitting wood by striking the spine with another object) and prying \u2014 essential functions for survival and tactical knives.<\/p>\n\n\n\n
How It Varies by Knife Type<\/strong><\/p>\n\n\n\n
OEM Spec Note<\/strong> Specify spine thickness at three points<\/strong>: at the bolster (thickest), at mid-blade, and 10 mm from the tip. A distal taper<\/strong> (spine thinning from bolster to tip) is standard on high-end knives and improves balance, but it requires tighter forging tolerances (\u00b10.15 mm vs \u00b10.25 mm for uniform spine).<\/p>\n<\/blockquote>\n\n\n\n
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Cost & Margin Note<\/strong> Spine thickness directly impacts material cost and forging time. A survival knife spine at 5 mm requires 2\u20133\u00d7 more stock steel<\/strong> than a kitchen knife spine at 2 mm, adding 15\u201320% to unit labor cost<\/strong>. However, specifying below 3 mm for survival knives triggers elevated return rates for “blade feels flimsy.”<\/p>\n<\/blockquote>\n\n\n\n
Blade Face \/ Flat<\/h3>\n\n\n\n
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Der blade face<\/strong> (or flat<\/strong>) is the surface between the edge and the spine. It is the “canvas” of the blade \u2014 the area that carries the finish, the maker’s mark, and any decorative patterns. But the face is not just cosmetic: its geometry and texture directly affect how food behaves on the blade.<\/p>\n\n\n\n
How It Performs<\/strong> The blade face affects three performance characteristics:<\/p>\n\n\n\n
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Food release:<\/strong> Concave grinds (hollow grind) or hammered textures (tsuchime) create air pockets that reduce vacuum adhesion, preventing sliced potatoes or meat from sticking to the blade.<\/li>\n\n\n\n
Aesthetics:<\/strong> The face carries the finish \u2014 satin, mirror, stonewash, or Damascus pattern \u2014 that customers see first and remember longest.<\/li>\n\n\n\n
Korrosionsbest\u00e4ndigkeit:<\/strong> Polished faces resist rust better than rough finishes; coated faces (PVD\/DLC) add a chemical barrier against moisture and acids.<\/li>\n<\/ul>\n\n\n\n
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OEM Spec Note<\/strong> For kitchen knives destined for humid climates (Southeast Asia, coastal US), specify a minimum surface finish of 400-grit satin<\/strong> or apply a corrosion-resistant coating. Bare, unpolished steel faces show rust spots within 2\u20133 months in >70% humidity environments.<\/p>\n<\/blockquote>\n\n\n\n
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Risk Note<\/strong> Damascus-pattern cladding with VG-10 core is the #1 requested OEM configuration<\/strong> from European buyers. The cladding adds 20\u201330% to material cost<\/strong> but commands a 50%+ retail premium<\/strong>. Ensure your supplier can consistently produce pattern uniformity across production runs \u2014 pattern variation is a top cosmetic rejection reason.<\/p>\n<\/blockquote>\n\n\n\n
Ferse<\/h3>\n\n\n\n
Der heel<\/strong> is the rear portion of the blade edge, right where the blade meets the bolster or handle. On most kitchen knives, it is the tallest and thickest section of the edge, providing structural support for the entire blade. Think of it as the “power zone” of the knife \u2014 the part you instinctively press down on when cutting through a tough squash or separating a chicken joint.<\/p>\n\n\n\n
2. How It Performs<\/strong> The heel does two jobs that no other part of the blade can match. First, it delivers downward force<\/strong> \u2014 because it sits directly above the handle, your hand pressure transfers most efficiently through the heel into the cutting board. Second, it provides knuckle clearance<\/strong>: on an 8-inch chef’s knife, a properly sized heel stands 45\u201355 mm tall<\/strong>, keeping your knuckles safely above the board during fast chopping motions.<\/p>\n\n\n\n
3. How It Varies by Knife Type<\/strong><\/p>\n\n\n\n
OEM Spec Note<\/strong> When specifying chef’s knives for European buyers, lock heel height at 45\u201350 mm<\/strong> for 8-inch blades. European grip styles (pinch grip) favor moderate clearance with balanced weight. For US buyers, 50\u201355 mm<\/strong> is preferred \u2014 the taller heel accommodates larger hand sizes and more aggressive rocking motions. Always specify heel height as a CTQ (Critical-to-Quality) dimension<\/strong> with \u00b11.5 mm tolerance; anything outside this range triggers elevated return rates for “handle feels wrong.”<\/p>\n<\/blockquote>\n\n\n\n
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Compliance & Risk Note<\/strong> The heel is the #1 false-failure point<\/strong> in warranty claims. Customers often report “blade is bent” when the issue is actually a rolled heel edge<\/strong> caused by improper use (prying with the heel, cutting on glass boards). Pre-empt this by including a care card illustration showing correct heel use. For OEM buyers: clarify in your product manual whether heel sharpening is covered under warranty \u2014 many manufacturers exclude heel damage from standard coverage.<\/p>\n\n\n\n
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Ricasso, Choil & Plunge Line<\/h3>\n\n\n\n
Ricasso<\/strong><\/h4>\n\n\n\n
Der ricasso<\/strong> is the unsharpened, thick section of blade just above the bolster. On Japanese knives, this area is sometimes called \u93ac (shinogi-ji)<\/strong>. The ricasso provides structural support at the blade-handle transition and acts as a visual boundary between the sharpened edge and the handle assembly. On high-end knives, the ricasso is polished to a higher finish than the blade face, creating a deliberate aesthetic contrast.<\/p>\n\n\n\n
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OEM Spec Note<\/strong> Ricasso width (the distance from bolster to the start of the primary grind) should be 8\u201315 mm<\/strong> on chef’s knives. Too narrow, and the blade looks “inset” into the handle; too wide, and the knife loses effective edge length. Specify ricasso finish separately from blade face finish if you want the two-tone aesthetic common on premium Western knives.<\/p>\n<\/blockquote>\n\n\n\n
Choil<\/strong><\/h4>\n\n\n\n
Der choil<\/strong> is a small unsharpened notch between the edge and the handle. A finger choil<\/strong> provides grip security for detailed work \u2014 your index finger hooks into the choil for controlled tip-down cuts. A
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