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For the guys smarter than me, I need an allen driver


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#1 MattD

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Posted 23 July 2020 - 10:18 PM

I need a driver for the allen head machine screws that fit the outside tapped holes in the fk 180 motors.   I need to know the proper size to fit those little metric machine screws.   Anybody know the size?

 

thanks


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#2 Ramcatlarry

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Posted 23 July 2020 - 10:48 PM

whose screws?  Some are .050" and some are std 5/64"...or even 2mm.


Larry D. Kelley, MA
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#3 BrettC

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Posted 23 July 2020 - 10:52 PM

The driver bit for them should be 1.5 mm.


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#4 MattD

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Posted 24 July 2020 - 09:18 AM

I buy these screws in bulk and they are called M2 and are followed by the length, like M2X1 1/2.   Here is a picture to show the common screws.

 

Bottom driver is for self tapping allen motor can screws.   Middle driver is for set screws in wheels and gears.   Top screw is the machine screw that fits the outside holes in the FK 180 can.  It is the M2 size that I need a driver for.

P1010002.JPG

 

P1010003.JPG


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#5 MattD

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Posted 24 July 2020 - 09:20 AM

Larry when I look at drivers, I can't find one that says" this fits an M2 allen screw".   The last one I ordered that said 2m was way too small and I decided to not waste any more money unless I know I am getting the right size.


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#6 Eddie Fleming

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Posted 24 July 2020 - 09:59 AM

JK part # JK-80422 or new # JKL12

 

1.5MM


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#7 bradblohm

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Posted 24 July 2020 - 12:19 PM

https://www.professo...t-p/nsr4411.htm


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#8 MattD

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Posted 24 July 2020 - 01:45 PM

Thanks Brad.    I've looked at the PM website several times to try and find a driver with no luck.   I guess you had to make the website to know where to look!!!

 

I ordered a 1.5 from Amazon Prime this morning and it should be here tomorrow.

 

thanks guys


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#9 bradblohm

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Posted 24 July 2020 - 02:03 PM

Your initial point though is spot on.  Not enough use the three methods of referring to size.  I just remember NSR calling out M number, metric, and imperial.


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#10 MSwiss

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Posted 24 July 2020 - 02:07 PM

https://www.professo...t-p/nsr4411.htm

That link is very confusing, Brad.

.035" or .9MM is not what you would use with 2MM motor screws.

It is way, way too small.

Like everyone else posted, it's a 1.5MM.

The .035" one I have, is the size you take Slot-it wheels, off and on, with.
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#11 Dave Crevie

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Posted 24 July 2020 - 03:01 PM

Plus you run into the problem of every fastener manufacturer not using the same specs. Technically, the ASTM specs for hex size are what we are supposed to be using, but then ISO got involved, and being European based, they didn't necessarily like what we Yanks were using for metric size tolerances. So things got a little balled up. My position as GM at a very large manufacturing concern put me in the middle of it all. Quite often we had to go to a different supplier for screws when our usual supplier was OOS. Then we found that the allen tips were rounding off at the specified torque. After sorting this all out, we ended up keeping different sets of wrenches, each purchased from the supplier of the screws. All that being said, while racing 1/32 home set cars with a club, we found that the Wiha wrenches were stripping out in the Slot-it set screws. The wrench's from Professor Motor lasted much longer. Likewise, I found the Koford and JK wrenches held up best for the 4-40 set screws in 1/24th gears and wheels.      
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#12 bradblohm

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Posted 24 July 2020 - 05:59 PM

Yes Mike, I should have linked him to the proper tool he was looking for.  I just wanted to show Matt there were some tools on the PM website that listed all sizing methods.  And, as Dave points out, sizing and tool quality varies.  For me, in plasticar-land I like the NSR tools, and Sloting Plus are good, and in commercial-land it's old Parma tools and various "industrial-grade" items.

 

That link is very confusing, Brad.
 


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#13 BrettC

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Posted 24 July 2020 - 06:15 PM

 

for SlotIt, it is listed at .9 mm, but I’ve found the tile rounds off fairly quickly, and ha been using a .95 mm, and finds it fits perfectly.

for wheels that go on a 1/8 th axle, the bit size in metric is 1.3 mm.

 

 

 

That link is very confusing, Brad.

.035" or .9MM is not what you would use with 2MM motor screws.

It is way, way too small.

Like everyone else posted, it's a 1.5MM.

The .035" one I have, is the size you take Slot-it wheels, off and on, with.

 

 

 


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#14 Rotorranch

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Posted 24 July 2020 - 06:26 PM

The correct screw would be a M2x3, or M2x4 if has a thick motor plate.

 

Depending on the screw used, it could be 1.4mm, 1,5mm, or 0.050in. Maybe even 2.0mm depending on the screw head.

 

Lots of options.

 

Rotor


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#15 Bill from NH

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Posted 24 July 2020 - 07:22 PM

When I bought M2 screws, I bought hex head. I already had a handful of different hex bit screwdrivers.


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#16 Rotorranch

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Posted 24 July 2020 - 07:55 PM

I use M2 stainless steel M2 button screws. They will work with a regular 0.050 wrench. I buy them 100 at a time. I think Pablo will agree.

 

Rotor


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#17 MSwiss

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Posted 24 July 2020 - 08:04 PM

See his post #4.

If he had .050" ones, he wouldn't of needed a wrench.

I sell a lot of my CR018 cap head screws, because it has a deep socket, with a sharply defined end, that won't strip out when using a ball end (1.5MM) wrench.

They are also made of a steel alloy that is stronger than stainless.

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#18 MattD

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Posted 24 July 2020 - 08:32 PM

I use the .050  wrench  for self tapping allen head screws in the un-tapped center hole in the motor can.   I also have M2 machine screws that fit the threaded side holes and that is the driver I was looking for.  They are not the same size screws.    

 

All the different ways of describing the size is what made it hard to figure out what I needed.   


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#19 MSwiss

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Posted 24 July 2020 - 09:10 PM

On the self-tapping, .050" or 5/64" ?

 

The Parma and JK self tapping screws use a 5/64" wrench.


Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
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Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#20 MattD

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Posted 24 July 2020 - 10:03 PM

My mistake Mike, the 5/64 is the self tapping screws.   


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#21 Ramcatlarry

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Posted 24 July 2020 - 10:28 PM

I retap my metric motors to 4/40 so I can use my 5/64" motor wrench. No confusion, no problems.  My stainless screws work all the time.


Larry D. Kelley, MA
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#22 MSwiss

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Posted 24 July 2020 - 11:56 PM

Larry, I think you meant 2-56.

A 4-40 cap head is huge, and uses a 3/32 hex wrench.
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Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#23 MattD

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Posted 26 July 2020 - 03:24 PM

P1010005.JPG

 

The driver is labeled 1.5 and screws are called 2mm.    This driver is what I needed, thanks for the help.

 

Larry if you tap the cans, do you worry about metal bits in the can?


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#24 MG Brown

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Posted 26 July 2020 - 04:29 PM

I prefer WIHA drivers and they can be purchased directly from WIHA (Willi Hahn Corporation - A Subsidiary of Wiha Werkzeuge Gmbh Schonach Germany) or Granger, Zoro, Fastenal, Allied Supply Company and others.

Do yourself a favor and buy a set of the hex drivers and a carrying pouch. One set of Metric and one set of Inch. If you're feeling flush, their nut drivers are handy too.

 

Screen Shot 2020-07-26 at 4.27.52 PM.png

 

 


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#25 Ramcatlarry

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Posted 26 July 2020 - 06:13 PM

Nut drivers are really handy for the retro front axle nuts and controller repairs.


Larry D. Kelley, MA
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