Machinists, please look away!

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Rob27
Posts: 744
Joined: Wed May 12, 2021 9:34 am
Location: Just north of Toronto

Machinists, please look away!

#1 Post by Rob27 »

I have been doing a lot of work on triggers from several Crosman Optimuses and as such have regularly been chasing the e-clips around my shop as they go pinging off wildly as I push them off with a flat blade screwdriver. As a result, I found myself looking for some replacement e-clips and a bit farther down the page I saw a listing for an e-clip remover/installer tool. Eureka!

Unfortunately it was vague about what sizes it works on so I started searching for others – I found a couple but some of the reviews said they did not fit the size that was needed or they worked for installing, but not for removing, or that they wore out after a few uses. So, I was not eager to blow $30 on something that might not work, but I was able to see a picture of one and thought “I could probably make one of those.” I have previously thought about just grinding a slot into the middle of a flat blade but never got around to doing it.

I took a few rough measurements and determined that the e-clip that I wanted to remove has an outside diameter of 7mm. The pin that it is retaining has a diameter of 4mm and the opening in the clip seems to be about 3.5mm.

I scrounged around the shop for a suitable thin piece of metal and decided that an almost-ready-for-the-recycling-bin hacksaw blade would work. My initial plan was just to drill a couple holes, connect the dots and round off some corners with a Dremel tool and be done with it. First attempt to center punch a mark in the blade did not make a mark, so I whacked it a bit harder and the blade snapped – I never expected a hacksaw blade to be that brittle. New plan – just use the Dremel on my freshly snapped off blade…

My first try was to duplicate what I saw online – like this.
Online version1.jpg
My hacksaw blade had snapped off on a bit of an angle and since I expected that I would be making a few different prototypes, I did not bother to square it off. I basically just ground a slot into the end of the blade and tried it out. I discovered that the “pointy” side of the slot actually worked better than the other side since it fit inside the opening of the clip and forced it apart. I took this idea and ran with it and made both sides wedge the mouth of the clip outwards. It worked – but surprise - the clip sprang off across the table! I remembered that one of the designs that I had seen online seemed to have a slot that the e-clip sat in.

My solution was to add another layer to the tool so that the top layer would slide over the shaft and contain the clip somewhat. It worked!

My 2 layers of very roughly cut hacksaw blade seem to do the trick.
As you might expect with a fabrication of this level of quality, the layers are held together by a wrap of hockey sock tape. I still need to buy some replacement e-clips though…

The challenge:
The challenge.jpg
The parts:
the parts.jpg
Cannot add more pictures - another post to follow
Rob27
Posts: 744
Joined: Wed May 12, 2021 9:34 am
Location: Just north of Toronto

Re: Machinists, please look away!

#2 Post by Rob27 »

In action:
In action.jpg
Finished view:
Finished top view.jpg
Finished bottom view.jpg
Daryl
Posts: 12155
Joined: Wed Jan 05, 2011 12:35 pm
Location: P.G. B.C.

Re: Machinists, please look away!

#3 Post by Daryl »

Cool Tool, as long as it works for you, GREAT! I've always only used needle nose pliers.
The tool looks much better.
Best Wishes
Daryl
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airmec
Posts: 2019
Joined: Thu May 07, 2015 9:30 pm
Location: Eastern Townships

Re: Machinists, please look away!

#4 Post by airmec »

Hey nice work there! Your tool works and quite honestly, doesn't look bad at all :wink: . You'd cringe if you'd see some ''custom'' tools my machinists colleagues made lol!
If everything's so lovely yeah, then why don't I, why don't I, why don't I, why don't I feel lovely?
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Dukemeister
Posts: 4443
Joined: Fri Jan 22, 2010 1:17 pm
Location: Kingston, ON

Re: Machinists, please look away!

#5 Post by Dukemeister »

Awesome tool, Rob.
Now add a neodymium :drinkers: magnet to the top to catch the e-clip and they'll never get away again. :drinkers:

))))----//----------==

Iacio, ergo sum
Rob27
Posts: 744
Joined: Wed May 12, 2021 9:34 am
Location: Just north of Toronto

Re: Machinists, please look away!

#6 Post by Rob27 »

Thanks guys!
Great add Duke.
I thought that this would just be the "version 1 prototype" but it works as is. I will try stick a magnet on the handle so it will not obscure the sight picture out the front.
Daryl
Posts: 12155
Joined: Wed Jan 05, 2011 12:35 pm
Location: P.G. B.C.

Re: Machinists, please look away!

#7 Post by Daryl »

Hell of a good idea, Duke. Princess Auto has them in packages, several sizes, too.
Best Wishes
Daryl
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