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Piston Seal Kit For Original 1930s Conklin Nozac For Sale

Piston Seal Kit For Original 1930s Conklin Nozac


Vintagepens Store

Piston seal replacement kit for 1930s Conklin Nozacs

These seals are used in pairs; 40 pieces are included in our kit, comprising ten each in four different graduated sizes. These O-rings will stretch over the piston head, and seal tighter and with less friction than any other seals we've tried. No more time-consuming gluing together of painstakingly hand-finished split cork washers!

Replacement of the piston seal of a piston-filler is usually a straightforward operation once the pen has been dismantled. The end flange of the piston typically unscrews, allowing a new seal to be installed. The Conklin Nozac is more problematic, since the piston head is permanently assembled, requiring the new seal to be either cut in half and glued together around the piston head, or stretched over the piston head flange (the original seal consisted of one disk of rubber and another of cork, put in place before the piston head flange was crimped in place).

After considerable experimentation, we have settled upon pairs of O-rings as the optimal form of replacement seal. The rings can readily be stretched into place, and the space between the rings provides a recess that can trap silicone grease, greatly reducing the need to relubricate. With rings of the correct size, the seal against the barrel wall is airtight, yet there is minimal friction -- an important consideration with Nozacs, whose screw mechanism is lightly built and easily overstressed.

We are currently providing seals in sets, with each set containing seals in four thicknesses, denoted as A, B, C, and D.
A and B will fit most standard-sized (5000-word) Nozacs; use C or D for oversize pens (7000-word). Nozacs vary in internal dimensions, so you may have to try a couple of different sizes for optimal results. A properly-sized seal should allow the piston to move with only modest resistance, with the seal contacting the inside of the barrel continuously all the way around, from the outside appearing as a thin, unbroken line.

NOTE: These seals may also be used on other piston-fillers, since most pens' dimensions fall into a fairly narrow range.

For more information about VINTAGEPENS please see our page.

Click here to see our other items!

Click here for more on Conklin Nozacs.

We are happy to combine shipping charges, but please note that often does not do this automatically. If you are buying more than one item and shipping charges are not calculated correctly, please do NOT pay immediately, and instead let us send you an invoice with shipping charges adjusted.



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Piston Seal Kit For Original 1930s Conklin Nozac

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Piston Seal Kit For Original 1930s Conklin Nozac:
$25




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