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B&Q£19.07Visit shop B&Q - Mobius & Ruppert (M+R) Black Crank Desktop Pencil Sharpener (7-11.6 mm)German Precision & Auto-Stop
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The Möbius & Ruppert Black Crank Desktop Pencil Sharpener is a high-performance manual sharpening tool designed for artists, students, and professionals who require consistent, precision points for graphite and colored pencils ranging from 7 to 11.6 mm. Its standout feature is the German-engineered die-cast metal construction that provides long-term durability and stability, though its size makes it less portable than handheld alternatives.
| Model Part Number | 1438588 |
|---|---|
| Brand | Möbius & Ruppert |
Yes, the versatile gripping mechanism is designed to accommodate various pencil shapes, including hexagonal, round, and triangular, within the specified diameter range.
While it can sharpen many colored pencils, be cautious with extremely soft or crumbling pastel leads, as they may clog the internal mechanism more quickly.
The Möbius & Ruppert units are known for longevity, but should you experience dulling after extensive use, consult the manufacturer for genuine replacement parts.
It is designed to be stable enough for desk use without a clamp, though it is compatible with most standard third-party desktop clamping accessories if you prefer a locked-down setup.
The long cone creates a thinner, longer point for fine detail work, while the short cone creates a stubbier, more robust point that is less likely to break during heavy-handed writing.
Check that the pencil is inserted straight and the sharpening profile is set correctly. If the issue persists, ensure the shavings tray is not overfilled.
Remove the pencil and check for a broken lead tip lodged in the cutters. Use a thin, non-metallic tool to gently clear the obstruction.
Ensure you are using a pencil within the 7–11.6 mm diameter range. If the pencil is too thin, the guide may not trigger the stop mechanism correctly.
To begin using the sharpener, ensure the base is placed on a flat, stable surface. While it does not require permanent mounting, placing a non-slip mat underneath can prevent movement. To sharpen, insert the pencil into the front port until the mechanism grips it, then rotate the handle in a clockwise motion until the resistance fades.
Care Instructions:
