[R-390] Bristol set screws

[Scott Bauer]

 I use my Bristol set screws to attach the gears with my 3/8 impact 
wrench and
trusty adapter. Its real easy, just set the compressor regulator to 90 
pounds
and let er rip. I have never broke a screw yet, just cross threaded a 
few which
worked out great as they will never come loose. I also use the impact 
wrench to
tighten the IF can covers down. Its real fast.

Bob Camp wrote:
> Hi
>
> The gears are attached to the shafts with the same kind of set screws. 
> Some gears see a *lot* of torque. Having one set screw on the knobs 
> and another on the gears is a real mess.
>
> Bob
>
>
> On Jan 4, 2008, at 2:51 AM, Chris Kepus wrote:
>
>> Thanks to those who responded to my inquiry.
>>
>> OK...Here's what I got out of the responses:
>>
>> Stick with the Bristol set screws primarily because *IF* the correct 
>> size
>> Bristol wrench is used, the amount of torque that can exerted without
>> damaging (or ruining) the set screw socket is likely to be higher 
>> than with
>> allen sockets /wrenches.
>>
>> Whew!  I am surprised that it would take that much torque to tighten set
>> screws so the knobs wouldn't slip when turning them.  No wonder about 
>> the
>> tales of anquish from those who are unable to remove a knob or shaft
>> connector due to the galling on the shaft caused by too much torque 
>> !!??  I
>> haven't dug deep enough into my 390A yet to experience a switch or 
>> control
>> knob that needs a lot of torque to twist.
>>
>> Thanks es 73,
>> Chris
>> W7JPG
>>
>>
>>
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