The Pentel Graph Gear 1000, Pentel Graph 1000 for Pro, Pilot S3, S5, S10, Uni 552 Series, and the Uni Shift Pipe Lock 0.4 mm drafting pencils are the most popular pencils available with 0.4 mm lead. 0.4 mm Mechanical Pencil LeadĠ.4 mm pencil lead is a typical size in Japan, but it is not manufactured by any non-Japanese pencil manufacturers. The Rotring 0.35 mm lead refills will fit in other manufacturers’ 0.3 mm pencils. It makes no difference you can use 0.3 mm pencil lead refills in Rotring 0.35mm mechanical pencils. The lead is closer to 0.35 mm, with Rotring labeling their mechanical pencils and lead refills as 0.35 mm in diameter. When the manufacturers switched from imperial to metric measurements for their lead diameters, most manufacturers rounded down to 0.3 mm to show the size on their packaging and labeling. Rotring is one of the few companies that brands their pencil lead as 0.35 mm in diameter. 0.3 mm Mechanical Pencil LeadĠ.3 mm lead is a standard size that is often used by drafters for technical drawing. Many people prefer the softer 2B lead as it is darker and partially negates the scratchiness of the tiny protective lead sleeve that it extends the lead from. Pentels AIN Stein 0.2 mm lead is available in HB, B, & 2B lead grades. These pencils are no longer manufactured by Pentel and replaced with the Pentel Orenz 0.2mm mechanical pencil. It was first introduced in 1973 when they launched their PG2/PG2AD mechanical pencils. Pentel is the only manufacturer that makes 0.2 mm pencil lead. The diameter of 1.18 mm lead is close enough to 1.1, 1.15, and 1.2 mm to fit and work in these pencils. Other manufacturers rounded up, i.e., 1.1 mm, 1.15 mm, and 1.2 mm, are now considered 1.18 mm in diameter. When the manufacturers converted their measurements to mm, some rounded down, i.e., 0.35 mm rounded down to 0.3 mm diameter lead.

Today, we measure mechanical pencil leads in mm. This is due to the diameter of the first mechanical pencil being measured in inches.

However, some of the lead sizes are close enough in diameter to be considered the same size. There are many lead diameters listed by the different pencil manufacturers for their mechanical pencils. What are Sheaffer Mechanical Pencil Lead Sizes? 1. What are Parker Mechanical Pencil Lead Sizes? What are Papermate Mechanical Pencil Lead Sizes? What are Cross Mechanical Pencil Lead Sizes? What are Bic Mechanical Pencils Lead Sizes? What are Vintage Mechanical Pencil Lead Sizes? How Do You Measure Mechanical Pencil Lead Size? What Is The Smallest/Thinnest Mechanical Pencil Lead? What are the Most Common Mechanical Pencil Lead Sizes? What is the Standard Mechanical Pencil Lead Size? Can You Put Any Size Lead In A Mechanical Pencil? 1 Mechanical Pencil Lead Size Comparison.

Zebra 2 mechanical pencils