[GreenKeys] Friden SFD-V

[Richard Knoppow]

    The two smallest size sockets were four spline, the others six 
splines, so if yours are four spline Bristol there are only two sizes 
they can be.  BTW Bristol is still in business but lists only aircraft 
hardware on their site. However, within the last few years I bought a 
full set of L wrenches made by Bristol via Amazon. Excelite also makes 
Bristol drivers. For use on my old Collins gear I need both but mostly 
use the long Excelite drivers. The extension can get to places you just 
can't with the L wrenches. The Excelite sets are not cheap, maybe $50 
for the set although some shopping around may find them for less. I 
don't remember what the L wrenches cost, perhaps $20.

On 1/18/2017 6:54 PM, Cory Heisterkamp wrote:
> Closer examination of my machine shows a 4-pointed bristol in that location. The manual is no help on size but does say to set the smaller (tab) pulley at .003" backlash when you put it back together. -C
>
> On Jan 18, 2017, at 8:01 PM, Richard Knoppow wrote:
>
>>   Look with a magnifying glass. Allen head screws have hexagonal flat sides, Bristol screws have either six or four sort of star shaped grooves. There are some other types of heads but they are rare.  See the following for good illustrations of various drive styles.
>>
>> https://en.wikipedia.org/wiki/List_of_screw_drives
>>
>> On 1/18/2017 4:35 PM, Cory Heisterkamp wrote:
>>> Are you sure it's not a Bristol key? The Model FL Flexowriter I am
>>> working on (and I do mean that literally...I'm recoding the keyboard
>>> slides at this very moment) is full of 'em. -Cory
>>
>> --
>> Richard Knoppow
>> 1oldlens1 at ix.netcom.com
>> WB6KBL
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL