Mechanical Pencils Eraser Sizes & Info




We thought it might be helpful to keep track of which size eraser fits in which mechanical pencils. This is a very simple list. There could be oddities and exceptions. We've also listed known diameters of erasers we've measured and other little tidbits of eraser information. Whatever we come up with that might be helpful, we'll keep adding to the list. If you have a positive identification of pencil and eraser size, please drop us an email and we'll include it on this list. We hope this info is helpful to you!

Remember to save any metal sleeves that may hold or surround old erasers, you'll probably need them!

AUTOPOINT
Autopoint No. 40E erasers = 6.7mm dia
Autopoint No. 39E = 8.5mm dia



ESTERBROOK
Esterbrook "Dollar" Push Pencil (cap actuated), 4 3/4" long - Eraser is 5 mm diameter and its metal collar is 6 mm in diameter. The collar is 3/8" or 1 cm long
Esterbrook Early "PJ" (uses 0.46/1.1mm dia lead) model, 4 7/8" long - Eraser is 5 mm diameter
Esterbrook later "PJ" model - (uses 0.46/1.1mm dia lead), 4 7/8" long - Eraser is 5 mm diameter
Esterbrook "TJ" model (uses 0.36/0.9mm dia leads) Eraser is 5 mm diameter
Esterbrook Small "TJ" model (uses 0.36/0.9mm dia leads), collar is 1/4 inch long. Eraser is 5 mm diameter
(Thank you to Jim Crutchfield for the above Esterbrook information.)

After further investigation, it seems that many PJ and TJ erasers use 6mm diameter erasers, a fairly common size. Perhaps Esterbrook changed eraser size specs over the many years of production? At any rate, please be sure to measure your Esterbrook pencils before ordering to ascertain if your pencil uses 5mm or 6mm erasers.


EVERSHARP
Utility Pencils (ca. 1930s long pencils) use 7.4mm dia erasers


PARKER
Parker 45 pencils use 3.45mm dia erasers
Parker 51 pencils use 6mm dia erasers
Parker 75 metal twist activated pencils use 6mm dia erasers
Parker 75 plastic and later 0.5mm pencils use 3.45mm erasers
Parker 95 pencils use 5.0mm dia erasers
Parker Arrow pencils use 5.0mm erasers
Parker Classic pencils use 4.7mm dia erasers
Parker MODERN Duofold pencils use 9.0mm erasers
Parker Jotter pencils use 4.7mm dia erasers
Parker Premiere pencils use 5.0mm dia erasers
Parker Vector pencils use 4.7mm dia erasers


SHEAFFER
Over the years, Sheaffer many times used letter designations for erasers. Below is a list of the the letter designations and corresponding diameter or the eraser.

B = 5.25mm dia
D = 3.9 - 4.0mm dia, length 14mm
G = 5.0mm
P = 6.0mm dia

Sheaffer Agio pencils use 5.0mm dia erasers

There were two versions of Sheaffer Targa pencils, early ones used 0.9mm diameter leads, later ones used 0.5mm diameter leads and of course they each used a different eraser! So, if you can figure our which lead your Targa takes, you can also figure out the eraser:

Sheaffer Targa 0.5mm diameter lead pencils use Sheaffer Type G 5.0mm diameter erasers

Sheaffer Targa 0.9mm diameter lead pencils use Sheaffer Type A erasers

SCRIPTO
K780 (clear and translucent colors) use 6.6mm dia erasers



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