PDP-11/34 rails?

[steven at malikoff.com]

---------------------------- Original Message ----------------------------
Subject: Re: PDP-11/34 rails?
From:    "Todd Goodman via cctalk" <cctalk at classiccmp.org>
Date:    Mon, March 6, 2017 1:48 am
To:      "Noel Chiappa" <jnc at mercury.lcs.mit.edu>
         "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
--------------------------------------------------------------------------

> * Noel Chiappa via cctalk <cctalk at classiccmp.org> [170304 22:34]:
> [..SNIP..]
>> Anyway, I've seen BA11-K boxes with several different kind of mounting
>> slides.
>>
>> The tall, grey-coated ones are made by Chassis Trak, a division of General
>> Devices of Indianapolis. The 4 I looked at, all idential looking (except for
>> handedness), all had different numbers on the CT sticker, so I don't know what
>> the model number is! This one says '060RH'.
> [..Snip..]
>> BTW, does anyone know that they grey coating is? Is it some sort of phosphate
>> plating, or perhaps some sort of early powder coat, or what? Mine are rusty,
>> and I'd like to blast them and get them re-coated, but I can't figure out
>> what that coating is.
>>
>> 	Noel
>
> The gray phosphate/nitrate coating sounds like Parkerizing.
> (https://en.wikipedia.org/wiki/Parkerizing)
>
> Gun parts places have home kits for doing the same (such as Brownell's
> http://www.brownells.com/gunsmith-tools-supplies/metal-prep-coloring/parkerizing/benchtop-parkerizing-kit-prod22737.aspx)
>
> But there are other coatings that might be easier to use such as
> Cerakote
> (http://www.brownells.com/gunsmith-tools-supplies/metal-prep-coloring/paint-finishes/air-cure-non-aerosol-paints/cerakote-ovencure-ceramic-coatings-prod26563.aspx)
> or even easier might be Duracoat
> (http://www.brownells.com/gunsmith-tools-supplies/metal-prep-coloring/paint-finishes/air-cure-non-aerosol-paints/duracoat-paints-prod44374.aspx)
>
> I haven't seen the coating you're talking about so I could be way off
> base too...
>
> Todd
>

Looking at the one pair of Chassis-Trak rails I acquired by chance, and am modifying for
the 11/15, the phosphate grey surface does indeed look like Parkerizing to me.
Although I have yet to find a script 'F' stamped on them (Todd would know :-)

Steve.