[ICOM] Icom Case Screws

[Larry L. Hinton]

Although a quick search for JIS tools came back with many hits, many Radio 
Controlled helicopters and the like use the JIS type screws. As such, any 
good hobby store will stock the tools. The JIS screw "looks" like a Phillips 
but more closely resembles a Frearson or Reed & Prince, though the latter 
went out of production in the '70s. The JIS type screwdriver has a 57 degree 
point with a flat tip and parallel wings.  The Phillips has a 57 degree 
point with tapered wings and the tip is "usually" rounded, but it can be 
blunt.  Henry Phillip's patent says the point "can be either flat, pointed, 
or rounded", but the ones I have in my toolbox are all rounded.

The real difference between the two is that the JIS was designed to NOT 
cam-out when excess torque is applied where as the Phillips WAS designed to 
cam-out.

The JIS tools can be used on Phillips screws without any problems but 
Phillips drivers cannot be used on the JIS unless you want to strip them 
out. People do "FORCE" the Phillips driver into the screw with an impact 
driver, but all they are doing is driving the flutes into the screw to get 
more bite. Bottom line is they are just damaging the screw.

Larry
K7YBZ

--------------------------------------------------
From: "Dave Edwards" <kd2e at comcast.net>
Sent: Sunday, January 02, 2011 7:37 AM
To: "ICOM Reflector" <icom at mailman.qth.net>
Subject: Re: [ICOM] Icom Case Screws

> I got this set many years ago when they were Jensen tools,
> The company changed names a few times...but, still the same thing.
> INHO, no ham should even own a YaeComWood without owning a set
> similar to these....otherwise, you're hammering with a crescent wrench!!!
>
> http://www.stanleysupplyservices.com/product-group.aspx?id=7899&pn=23-900
>
>
>
> .....Dave
>
>
>
>
> ----- Original Message ----- 
> From: "Adam Farson" <farson at shaw.ca>
> To: "'ICOM Reflector'" <icom at mailman.qth.net>
> Sent: Sunday, January 02, 2011 1:33 AM
> Subject: Re: [ICOM] Icom Case Screws
>
>
>> Hi Dave,
>>
>> I can confirm that. A Japanese (JIS) Phillips screwdriver fits the
>> screw-heads correctly and will not cam them out.
>>
>> JIS screws can often be identified by a dot indented into the screw-head.
>> They are used in all Japanese electronics.
>>
>> "Hozan" or "Engineer" brand JIS screwdrivers in sizes P00, P0 P1, P2 and
>> P3
>> may be available at major US tool supply houses. I purchased a set in
>> Osaka
>> last November.
>>
>> US #1 and #2 Phillips magnetic hex tips manufactured by Black & Decker or
>> Vermont-American are a reasonably close fit, if used with care.
>>
>> Cheers for now, 73,
>> Adam VA7OJ/AB4OJ
>>
>>
>> -----Original Message-----
>> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
>> On
>> Behalf Of Dave Edwards
>> Sent: 1-Jan-11 20:12
>> To: ICOM Reflector
>> Cc: ICOM Reflector
>> Subject: Re: [ICOM] Icom Case Screws
>>
>> Stripped Icom screws??   You are using a Japan phillips, correct??
>> (Yes...not a joke!)
>> ...Dave
>>
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>
> ----
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