Which Eraser Do I Need?

Unfortunately, as with most writing things, erasers were not very standardized over the years, nor are they now! However, there are a few common sizes that fit a good many of the pencils made.

The easiest way to determine what size eraser you need for your mechanical pencil is to measure the diameter of your old eraser in millimeters. If the eraser is gone, take a measurement of the opening where the eraser goes. Rulers work fine for this, but if you have a caliper, it will work even better!

If all else fails, and no erasers are the correct diameter for your pencil (yes, it happens!), you may have to consider carving your own eraser refills. Good old fashioned Pink Pearl erasers work well for this, as do Magic Rub white vinyl erasers. If you're handy, you can also make a metal "punch" and punch out refills from a larger block style eraser.

List of Mechanical Pencils and Eraser Sizes
Click Here

Pentel Eraser Refills

The Pentel PDE-1 eraser fits a number of older vintage mechanical pencils including Sheaffer Fineliner and TX pencils.

PDE-1

Pentel Erasers, white, 6.9mm diameter, 12.5mm length 6 per tube

$1

Sheaffer Type D Erasers
New Old Stock in Yellow Tin
Limited Supplies - $1 pack

These are probably late 1960s into the 1970s judging from the tin. Erasers are still nice and soft. Erasers are green, diameter is 3.9mm, length is 14mm, 3 erasers per tin.

Sheaffer Eraser Refills

Autopoint

New old stock Autopoint No. 40E Erasers in gold foil wrapped paper tube, 4 erasers per tube. Standard size, 6.7mm diameter. We spot checked these erasers and all checked are quite hard, a collectible, but not usable.
AUT-ERAS-40E-HARD	$1

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