The Sumitomo SBN 20-26 is a heavy-duty Tool Block designed for mounting standard parting, grooving, and cut-off blades securely on your lathe.

Just like the industry-standard Iscar blocks, this modular system provides maximum rigidity for thin cut-off blades by clamping them across a large surface area. This eliminates the vibration and chatter that often plague deep parting operations.

Shank Size: Features a standard 20mm functional shank height, making it a perfect fit for 20mm turrets or appropriately sized quick-change tool posts (such as a BXA or CXA).
Blade Compatibility: Designed to accept standard 26mm tall blades (such as the size 26 blades from Sumitomo, Iscar, Korloy, and others).
Adjustable Overhang: The block allows you to slide the blade in and out to set the exact overhang required for the diameter of your workpiece, ensuring you only extend the blade as far as absolutely necessary for maximum strength.

Condition

Used (Great Condition).

This tool block is in great used condition. Crucially, there are no signs of crashing, rubbing, or spun workpieces on the face of the block. The clamping mechanics are tight, and the jaw faces remain clean to provide a solid, flat grip on your blades.

Brand Information

Sumitomo Electric Hardmetal (Japan) is one of the world’s elite carbide tooling manufacturers. Known for their exceptional steel quality and precise machining tolerances, a genuine Sumitomo block will not stretch, warp, or strip its clamping threads under heavy loads like cheaper, generic alternatives.

Specifications

Feature	Specification
Brand	Sumitomo (Japan)
Model	SBN 20-26
Type	Parting & Grooving Blade Block
Shank Height	20mm (0.787″)
Accepts Blade Height	26mm
Overall Length	Approx. 80mm (3.149″)
Coolant	Non-Coolant
Included	Block Only (Blade not included)

Keywords

Sumitomo SBN 20-26, parting tool block, grooving blade holder, cut-off tool block, 20mm lathe tool, 26mm blade holder, Japanese lathe tooling, machinist tools.

Sumimoto

Sumitomo SBN 20-26 Lathe Parting Tool Block

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