The Black Flash
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| posted on 24/7/14 at 05:42 PM |
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Very large Screwdriver / "Drag link Socket"
Having finished work on the car, for a few weeks at least, I want to start giving my old 1940s Southbend Lathe a good strip down and rebuild.
Almost the very first problem are 4 large "cheese head" slotted screws. The slots in these measure 5/8" long by 3/32" wide -
far larger than any screwdriver. And they seem to be TIGHT. Two are shown below:
A bit of searching around for something to undo these has lead me to a thing called a "drag link socket", which seems to be a large
screwdriver bit for a 3/8 or 1/2 inch drive socket:
I can only seem to find these in the USA though - does anyone know if you can get such a thing over here? I'm thinking they might be known by a
different name or something. Or failing that, any other ideas?
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Smoking Frog
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| posted on 24/7/14 at 05:54 PM |
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I found this, but it's for a dzus type fastener, so it will have a slightly rounded tip. Looks like it would grind flat though.
TIPCO 3/4"' WIDE DZUS SOCKET 3/8"' DRIVE NEW OLD STOCK MADE FOR MOD
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Minicooper
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| posted on 24/7/14 at 05:59 PM |
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I bought one years ago from Snap-on, which makes sense with the American link
David
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llionellis
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| posted on 24/7/14 at 06:06 PM |
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Tooled up seem to do them
http://www.tooled-up.com/product/elora-3-8-square-drive-3mm-plain-slot-screwdriver-socket/114042/?Referrer=googleproductlisting&gclid=CKCE9LDD3r8C
FejpwgodxVsALA
Most impact drivers are 1/2"square drive and usually have a selection of bits in the set which might be a cheaper solution.
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benchmark51
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| posted on 24/7/14 at 06:35 PM |
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You may find something suitable in a impact driver set
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r1_pete
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| posted on 24/7/14 at 06:55 PM |
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I've got one, you're welcome to borrow.
If your miles away I can post if you cover the cost both ways......
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redturner
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| posted on 24/7/14 at 07:57 PM |
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Just looked in my impact box and I have one screw driver bit at 3/8" wide and one at 1/2". I would suggest that a 1/2" one would be
plenty wide enough....
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Angel Acevedo
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| posted on 24/7/14 at 08:13 PM |
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There's a tool like a Spring loaded punch that has a screwdriver on the "Punch" end.
Yo set the tool on the slot an hit with a Hammer.
The blow does three things.
Secure the blade in the slot, pushes the screw in a minute amount that may relief stiction and turn the screw.
It's been a long time since the last time I saw one and don't know how it's called.
Wish I could give more info.
Beware of what you wish.. for it may come true....
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40inches
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| posted on 24/7/14 at 09:17 PM |
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quote:
Originally posted by Angel Acevedo
There's a tool like a Spring loaded punch that has a screwdriver on the "Punch" end.
Yo set the tool on the slot an hit with a Hammer.
The blow does three things.
Secure the blade in the slot, pushes the screw in a minute amount that may relief stiction and turn the screw.
It's been a long time since the last time I saw one and don't know how it's called.
Wish I could give more info.
Impact Driver  Teng TTID20 Impact Driver Set 3/4"' Drive TC Tray | eBay
esponsive Jarilo Template
There are cheaper ones, but that one looks good quality.
[Edited on 24-7-14 by 40inches]
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v8kid
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| posted on 24/7/14 at 09:35 PM |
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Hammer and screwdriver hit it tangentially - good old pit engineering principles _-
- just like the south bend 
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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hughpinder
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| posted on 25/7/14 at 09:34 AM |
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Bit of 20mm steel bar and grind from both sides, then weld on a handle?
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mcerd1
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| posted on 25/7/14 at 10:05 AM |
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they sell cheap ones in the local motor factors up here with all the other specialist tools - maybe you could try your local places (assuming
you'll be in for car bits at some point anyway...)
[Edited on 25/7/2014 by mcerd1]
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The Black Flash
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| posted on 25/7/14 at 09:30 PM |
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Wow that's a lot of replies! Thanks for all the help!
I've already tried hammering it round, no luck. Also grinding up a tool, but I don't have anything tough enough and it just bends.
r1_pete, really appreciate the offer, but I think there are a few of these screws lurking in there, and chances are it's going to be a few
months while I'm doing it, and I wouldn't want to borrow a tool over such a long period.
So I think an impact driver looks like the best bet, I'll see how I get on.
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