Drawbar Hammer wrench

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737mechanic
Posts: 361
Joined: Thu Jun 04, 2009 6:27 pm
Location: Dallas

Drawbar Hammer wrench

Post by 737mechanic » Mon Dec 27, 2010 10:14 pm

Got tired of using my 3/4 wrench to tap my drawbar to unseat it so I made a drawbar wrench/hammer.

The parts are 7/8 brass rod a cheap tiawan 3/4 impact socket and and a piece of titanium rod that I get at work. I first bored out the impact socket and single point threaded it. Then I threaded the brass to fit the socket then drilled and threaded through both the socket and brass to make sure they would never loosen from one another. I then threaded the titanium rod and using locktite for studs I screwed them together.

All in all it turned out ok except for the knurling on the handle but since my knurls are pretty dull and the titanium is hard I didn't worry about doing it again as the crappy looking knurls will do there job just fine.
Attachments
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DSCN1521.jpg
Raw parts
DSCN1522.jpg
DSCN1525.jpg
DSCN1527.jpg

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steamin10
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Location: NW Indiana. Close to Lake Michigan S. tip

Re: Drawbar Hammer wrench

Post by steamin10 » Tue Dec 28, 2010 12:52 am

I bet it works good.

Nice fine threads.
Big Dave, former Millwright, Electrician, Environmental conditioning, and back yard Fixxit guy. Now retired, persuing boats, trains, and broken relics.
We have enough youth, how about a fountain of Smart. My computer beat me at chess, but not kickboxing
It is not getting caught in the rain, its learning to dance in it. People saying good morning, should have to prove it.

737mechanic
Posts: 361
Joined: Thu Jun 04, 2009 6:27 pm
Location: Dallas

Re: Drawbar Hammer wrench

Post by 737mechanic » Tue Dec 28, 2010 4:42 pm

Works much better than the old craftsman wrench I was using. The threads that hold the brass to the socket are 28 tpi. If I thread something that doesn't need any specific thread pitch I usally use 28 tpi becasue it seems to be a good all around pitch and since my lathe does not have a QC gear box I have to change gears to get the different thread pitches so I tend to leave it on 28 most of the time.

EdK
Posts: 688
Joined: Tue Apr 13, 2010 6:20 am
Location: Minnesota

Re: Drawbar Hammer wrench

Post by EdK » Tue Dec 28, 2010 5:41 pm

Nice job on the tool :!:

One question though, aren't those impact sockets hardened? Seems like it would be tough to thread if it's hardened steel.

Ed
Vectrax 14x40 lathe, Enco RF-45 clone mill, MillerMatic 180 MIG.

737mechanic
Posts: 361
Joined: Thu Jun 04, 2009 6:27 pm
Location: Dallas

Re: Drawbar Hammer wrench

Post by 737mechanic » Tue Dec 28, 2010 10:36 pm

Impact sockets are softer than a good normal socket which is why they down chatter when you are hitting them with a impact. Also I am sure the tiawan impact sockets are even softer. I wasn't sure at first if I was going to be able to bore it and thread it but after doing a test run and seeing how easy it was I knew it was going to be doable.

EdK
Posts: 688
Joined: Tue Apr 13, 2010 6:20 am
Location: Minnesota

Re: Drawbar Hammer wrench

Post by EdK » Wed Dec 29, 2010 5:32 pm

Thanks for the info on the impact sockets. I just may have to copy your tool. :)

Ed
Vectrax 14x40 lathe, Enco RF-45 clone mill, MillerMatic 180 MIG.

NorrisM
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Joined: Mon Jun 13, 2011 6:05 pm

Re: Drawbar Hammer wrench

Post by NorrisM » Tue Jun 14, 2011 10:04 am

How much lighter is the titanium over using a steel handle? It looks good especially with the titanium handle. How does titanium stand up to stress and time? Is it harder but more brittle than steel?
Anyone ever use a rapid prototype specialist for a project?

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Bruce_Mowbray
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Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Drawbar Hammer wrench

Post by Bruce_Mowbray » Fri Jun 17, 2011 7:46 am

Brilliant!! I have seen guys braze a huge blob of brass on the open end of their 3/4" wrenches to act as a soft hammer, but yours is a far better idea.
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

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