[GreenKeys] [External] FANUC PPR Paper Tape Punch - oil vs. grease

[Jones, Douglas W]

From: Eric Moore [mooreericnyc at gmail.com] -- Tuesday, July 7, 2020 11:33 AM
Subject: Re: [External] [GreenKeys] FANUC PPR Paper Tape Punch - oil vs. grease

> Do you have any brand/type recomendations for grease?

I've put together a web page on what I've learned about this.
-- https://www.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml

I've been using Starrett Tool and instrument oil (comes in a relatively small convenient bottle).

> I imagine the punch pins (pawls?) Will lose oil pretty quickly moving minutely but vigorously and rapidly through the vertical shafts of the punch head.

In the case of Teletypes, the punch pins are always lubricated with light oil, not grease, and they require the use of oiled paper tape in order to prevent loss of lubrication.  In the case of the BRPE punch, there's an instruction attached to the cover saying to oil the punch daily.  I've seen other brands of punch with a felt wick that serves as an oil reservoir.  Again, light oil is used..  I know that punches used in the CNC world were frequently used to punch mylar tape.  That can't be oiled, so the punch almost certainly relies on either some kind of oil reservoir, regular oiling, or perhaps grease.

A google search for fanuc manuals shows that there are quite a few out there.  I would guess that their product line had some continuity, so the wrong manual could well prove useful.

         Doug Jones
         jones at cs.uiowa.edu