TECH - Building a Pullmax-Style Hammer

Very cool I bet that thing makes some noise.

 

Drew, awesome, thanks

 

Next do some tech on how to make a lathe and mill. I would need those to build one of these!
Really cool tech.

 

I've been too busy at work to get any 4x8 pieces of sheet metal, so I used a small piece of s**** to demonstrate making a bowl shape.


The lines I've drawn show the shrinking pattern (yes, I know they are not perfectly straight). The first set of shrinks will go all the way to the small circle and the second set of shrinks will go to the larger circle. After shrinking the metal will be a little wavy like a potato chip, but a planishing hammer or english wheel will quickly smooth everything out.


Here is the set of planishing dies that I made. These are not hardened, but I'm only using 20 gauge steel so they should work.


After shrinking along the lines I laid out above and a couple minutes with the planishing dies I've got a nice bowl shape. My shrinking dies still need a little smoothing, but so far so good. This is nothing that could not be done manually... it is just so much faster and easier with this machine.

 

wow , outstanding !

 

Here is a video for those who asked. This clip is of the outer p*** of shrinking. The hammer is surprisingly quiet - the whine of the v-belt is just as loud as the hammer itself. I'm sure with hardened dies it would be slightly louder, but it will never be as loud as an air planishing hammer since the dies are rigidly mounted and not "thrown" into each other on each stroke.

 

very nice thanks
Bill

 

holy **** that's cool. . .

 

Very smart! Thats what its all about!

 

does the RPM seem OK for the shrinking dies ?

Beaulieu

 

Great work. It's now on my list of things to build.
Thanks.
Pete

 

The rpm seems pretty good for shrinking, but I have yet to experiment with it. My beats per minute is close to the Dake power hammer. It runs a little slow compared to other planishing hammers, so I might look into getting a variable speed drive.

 

Absolutely *****in! thanks for the plans, hope I can actually make one. With all of the tech stuff and cool gadgets and machines like this on the Hamb, I'm gonna need a bigger garage soon.

GOT MY VOTE!

 

Very nice tutorial!!

 

this one got my vote... great pics, good explanation and very well put together...

THANKS!

 

Here is a pemserter I just got today.

I was searching for abrasive stones for an old 5 gal paint shaker we bought to debur sleeves we put over hydraulic tubes before we weld them to the cylinder.

Searched ebay and this popped up at $75 -no reserve. E-sniped it and got it for the $75 plus $135 shipping.

I plan to rip-off your design for the mechanism.

It will be stronger than an Anoka, the sideframes are 1-1/2" thick.

It has over 18" throat, frames is about 24" x 24" what is in the photos weighs 650 lbs.

 

Hey,

Who put the FNG by my name???

 

HAHA!! FOR SURE!!! Awesome tech !!

 

bad ***

 

Hey .. I live over in ****inson and would love to check this thing out in person!!!

 

I work at TMS Hydraulics in Temple. 5:30am till 4pm Mon thru Thurs.

I had it delivered to work, freight was cheaper

My boss talked me into leaving it as a press to do a light stamping job.

I will make a special fixture that will accidentially work when I convert it to a power hammer. Nice thing is it will convert back to a press in 30 minutes.

Stop by and I will show you a broken tap "blaster" that I built for about $100 that works off a stick welder.

 

thats awsome thank you something to attempt when their is some freetime

 

Amazing.. I'm super Impressed man. Did you also build the camera you took the pictures with??

 

WoW Thanks
Drew...could you please give us a teck on power tapping with a milling machine.

mike

 

WOW! You sir are a ruler!

 

wow excellent tech. thank you!

 

I actually just got thru tapping a 1/4"-20 hole on the bridgeport. We are a production shop. I just chuck the tap drill in the jacobs, drill the hole then chuck in the tap.

I "baby" the power switch and use plenty of tap magic. When at the bottom just reverse and hold light up pressure on the spindle handle.

I ***ume you are aware that you don't have "rigid tapping" on a bridgeport

Yes it is hard on the chuck jaws.

 

Dam thats bad *** Drew can you do louvers!

 

a very cool thread and well built machine ,

 

I don't know how the Hell I missed this! I need to have you out to the shop to light a fire under my ***; I still haven't wired up the drill press you gave me, nor my milling machine(scared of electricity!).