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White triangular plastic scale ruler 12 inches long with six engineering scales 10 20 30 40 50 60 parts per inch

Staedtler

Staedtler 9871934BK Triangular Scale 12" White 10 20 30 40 50 60 parts per inch

SKU CH-ME1R-STDA3 MPN 9871934BK

Triangular scale ruler with six engineering scales from 10 to 60 parts per inch

  • TypeDrafting Supplies
  • ColorWhite
  • Quantity1 each
  • Precision drafting with six engineer scales
  • Full divided 10 20 30 40 50 60 parts per inch
  • Triangular design gives three usable edges
  • White plastic body with regular grooves
  • Twelve inch length fits standard drawing sheets

Engineering Triangular Scale 12

The Staedtler 9871934BK is a 12-inch triangular scale designed for engineers and drafters who need precise ratio measurements. Its three-sided profile provides six distinct scales in a single tool, covering 10, 20, 30, 40, 50 and 60 parts per inch for detailed technical drawings.

White Plastic Body with Regular Grooves

Moulded from white plastic, the scale resists corrosion and stays legible under studio lighting. The regular grooves give a positive tactile reference when aligning the rule against a drawing board or parallel rule, while the flat triangular cross-section prevents rolling off an inclined desk surface.

Single-Unit Supply for Immediate Use

Supplied as one complete scale, it requires no assembly or calibration before the first job. The permanent moulded graduations eliminate the risk of adhesive labels peeling or fading, so the instrument remains accurate for the life of the product. Not suited for users who need metric graduations or scales beyond 60 parts per inch.

Highlights

  • Precision drafting with six engineer scales
  • Full divided 10 20 30 40 50 60 parts per inch
  • Triangular design gives three usable edges
  • White plastic body with regular grooves
  • Twelve inch length fits standard drawing sheets

Specifications

TypeDrafting Supplies
BrandStaedtler
ColorWhite
Quantity1 each
Shipping weight0.05 kg
Package size97 × 19 × 13 mm

Questions about this item

What scales does the 12-inch triangular ruler offer?

The ruler provides six fully divided scales at 10, 20, 30, 40, 50 and 60 parts per inch across its three faces.

What are the physical dimensions and material of the Staedtler 9871934BK?

It is a 12-inch triangular scale made of white plastic with regular grooves on each face.

How do you read the correct scale on this triangular tool?

Rotate the ruler until the desired scale marking — 10, 20, 30, 40, 50 or 60 parts per inch — faces you, then measure along that edge.

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