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by Joshua904 » 6 Apr 2016 6:44
I have ten of these key switches I need to install at work http://www.mcmaster.com/mv1459456309/#7188K26From what I can tell this is the knock out I need https://www.zoro.com/greenlee-punch-d-s ... hRelevanceWe have a greenlee knock out set already, so I have the tools needed, just nothing but round and square dies. My question is (if this is the correct knock out) are there cheaper alternatives? The company I work for will need to buy it, but I would prefer to request the cheapest tool possible to guarantee I get it the first time without jumping through hoops. If it simply is what it is, then so be it- they'll have to suck it up.
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Joshua904
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by Squelchtone » 6 Apr 2016 8:00
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by GWiens2001 » 6 Apr 2016 9:15
Don't know about knockouts, but I do know tools. Keep in mind that the cheapest alternative may not be the best. Sometimes paying a little more for something may make the job a lot easier. Will the cheapest be able to get the job done? Frequently it will, at least for a while.
Then again sometimes the cheapest tools can be perfect. Am a professional mechanic with probably $100k tied up in my tools. The Harbor Freight 1/2" deep impact sockets I bought a week before I started in this industry just to hold me over until I could afford better tools have now been in heavy use daily for 12 years, and have never broken. Both sets (fractional and metric) combined cost me (on sale) the same as a single socket from Snap-On would have cost. Other Harbor Freight tools have broken and been replaced with better quality tools.
In most cases, though, there is a reason they charge more for one tool over another.
Gordon
Just when you finally think you have learned it all, that is when you learn that you don't know anything yet.
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by Joshua904 » 6 Apr 2016 9:35
Squelch- flats on both side.
Gordon- I still have my harbor freight deep wells as well, probably around 8 years ago. I also know their screw drivers don't last more than a week.. So yeah, I feel you.
I'm more or less looking for the tricks of the trade kinda info here. I could drill a 1/2 hole and use a burr bit and elongate the hole up and down and make it work. I'm just kinda over cobbling stuff together, and don't feel like repeating this ten times. It's not a huge rush. I'm going to be using them as a "maintanence bypass" on the back doors of our lathes so we don't have to hold the limit switch while troubleshooting/monitoring.
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Joshua904
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by Squelchtone » 6 Apr 2016 10:26
Is there a place on the back of your lathe that you can mount a single gang wall plate that is made to accept a key switch?   This way you could just drill a 3/4 or 1 inch hole in the back plate on the lathe with a step bit and a couple holes for the plate screws, either self tapping, or nuts and bolts and the plate would do the job of holding the switch locks on and would look nice, but I'm not sure if a plate mounted to the back of your equipment would look nice or strange. Squelchtone
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by Joshua904 » 6 Apr 2016 10:31
That would be fantastic! I never thought to check for those. I'll buy ya a beer if you ever hit north Florida.
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Joshua904
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by Squelchtone » 6 Apr 2016 12:11
Joshua904 wrote:http://www.allsecurityelectronics.net/store/pc/RP-21-Alarm-Controls-Medico-Keyswitch-Plate-5-Pack-2698p18351.htm
Can't really find much that don't come with the key switches already.
I searched for "single gang 3/4 D plate" https://www.surveillance-video.com/acce ... 299q.html/
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by Joshua904 » 6 Apr 2016 12:33
Need the double D style.
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by Squelchtone » 6 Apr 2016 12:51
Joshua904 wrote:Need the double D style.
picky pick! I'd like some double D's in my face too, but today's not my day. Here's what you need, their PR-20 model is the single flat, here's the double flat http://www.alarmcontrols.com/en/site/al ... tes/rp-21/*I don't know why the hole is at an angle, or why they did such a bad job photoshopping it. ** I know why the hole is at an angle.. that's how Medeco makes their switch locks:  Could you get your switches withthe 1 flat configuration instead of 2 flat sides, and if you used your current switches with the plate I suggested a few posts back, would the switch not stay just fine in a single flat hole based on the shape of the hole? Squelchtone
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by billdeserthills » 6 Apr 2016 14:29
Cheapest double D tool I know of is from Major Manufacturing called the MDPS-4
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by Joshua904 » 6 Apr 2016 14:53
The key switches I already have. Not exactly what I wanted but it works... Our parts guy isn't the sharpest tool in the shed. He somehow confused "key retaining" with maintained... But atleast he got the SPST part right, along with keyed alike. The ones linked from mc master carr in the original post is what I have. Just really needed an easier way to install them other than rotary tooling that odd shape.
The ones you linked too are the ones I found. Most places were charging per piece higher than what the 5 pack costed from my link in the last post.
I think I'm good now, and thank you for the wall plate idea.
Last edited by Joshua904 on 6 Apr 2016 14:56, edited 1 time in total.
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by RumballSolutions » 6 Apr 2016 15:02
If you are stuck without a Dpunch tool, you can always use a template of a double D hole and a zipsaw with a carbide bit to plunge cut sheet metal into the required shape. I have in a pinch used the faceplate off a deadbolt bolt as the template as it is a double D punch out that is very close to the usual double d required for cam locks. Deadbolt bolt faceplate also works as a fix plate that can be screwed/riveted/welded to the inside surface to restore a rounded out or oversize D hole.   
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