OHTO MS01 Mechanical Drafting Pencil

OHTO MS01 Mechanical Drafting Pencil

The OHTO MS01 Mechanical Drafting Pencil represents the pinnacle of Japanese precision engineering, purpose-built for architects, engineers, and technical artists. Combining a solid knurled brass grip with an anodized aluminum upper barrel, the MS01 features a dual-adjustment system that allows you to customize both the guide pipe sleeve length and the exact lead advancement per click. Whether drafting with straightedges, inking guidelines, or sketching intricate details, this instrument provides unparalleled balance, weight distribution, and tactile control.

Key Features

• Adjustable Lead Guide Sleeve: Twist the knurled grip section to adjust the steel guide pipe from 0 mm (fully retracted for pocket-safe carry) up to 5 mm for precise straightedge drafting.
• Customizable Lead Advancement Dial: Rotate the stepped calibration ring to regulate lead output between 0.2 mm and 2.0 mm per click, perfectly matching your writing cadence.
• Low Center of Gravity: Heavyweight knurled brass front section paired with a lightweight aluminum body yields optimal 27-gram balance that reduces drafting fatigue.
• Rotatable Lead Hardness Indicator: Integrated window lets you easily mark and identify active lead grades ranging from 4H to 2B.
• Durable All-Metal Mechanism: Precision-machined brass clutch and internal advance mechanism deliver flawless mechanical reliability and zero lead wobble.

Specifications

• Brand: OHTO
• Model: MS01 (Mechanical Sharp 01)
• Available Lead Diameters: 0.3 mm (Navy Blue), 0.5 mm (Silver, Matte Black)
• Materials: Brass grip and tip dial; Aluminum rear barrel; SK spring steel clip
• Guide Pipe Adjustment: 0 mm to 5 mm continuous extension
• Lead Feed Adjustment: 0.2 mm to 2.0 mm per click
• Dimensions: 151 mm × 10 mm (5.9 in × 0.39 in)
• Weight: 27 g (0.95 oz)
• Country of Origin: Japan

Frequently Asked Questions

How do I adjust the lead sleeve length on the OHTO MS01?
Twist the lower knurled grip section clockwise or counterclockwise to extend or retract the lead guide pipe between 0 mm (fully retracted and protected) and 5 mm.

How does the lead advance regulator work?
Turn the dial ring located directly above the brass grip. Aligning the dial sets the exact amount of lead released with each knock from 0.2 mm up to 2.0 mm.

Can the guide pipe be fully retracted to protect pockets?
Yes. Twisting the grip section to the 0 mm mark retracts the thin steel pipe completely inside the brass nose cone, preventing bending and pocket damage during travel.

Does the pencil include an eraser?
Yes, a refillable white mini eraser is housed securely underneath the top brass knock cap.