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View Full Version : New project - a PowerArm !



ksor
09-06-2015, 10:39 AM
Project started today with making the hardest component - the bell-shaped sleave holding the ball !

More details here in danish but you can Google Translate to the right just under the menu line - choose whatever language you like in the combobox:

http://kelds.weebly.com/power-arm.html

Hope you enjoy !

dfw5914
09-06-2015, 02:44 PM
The translate feature works well. This will be an interesting project to follow along with.
Thanks for posting.

RB211
09-06-2015, 04:10 PM
OxtoolCo on Youtube has videos for this, where the OP got the idea

vpt
09-06-2015, 04:12 PM
Very interesting! Looking forward to the build as well.

mike4
09-06-2015, 06:33 PM
It will be a very useful addition to your shop , looking forward to the build as well.

Michael

ksor
09-07-2015, 08:22 AM
Next part in the PowerArm project - the pivotting ball !

More details here in danish but you can Google Translate to the right just under the menu line - choose whatever language you like in the combobox:

http://kelds.weebly.com/power-arm.html

Hope you enjoy !

vpt
09-07-2015, 08:33 AM
The ball turned out real nice it looks!

A.K. Boomer
09-07-2015, 08:52 AM
What does this thing do?

Black Forest
09-07-2015, 09:00 AM
What does this thing do?

Thank you! That was what I was asking myself.

ksor
09-07-2015, 09:10 AM
What does this thing do?

What a PowerArm do ?

It helps you holding different objects in various positions - my drawing is NOT showing the vise/clip to hold the object though !

Seastar
09-07-2015, 09:28 AM
I have a professionally built one of those with a small vise attached on my main workbench in Indianapolis.
I have had it for over 50 years and use it often.
It does not have a lot of holding power but enough for small projects like fitting gun parts.
Sorry I can't remember the brand or post pictures.
I am in Minnesota and it's in Indiana.
Bill

A.K. Boomer
09-07-2015, 09:43 AM
What a PowerArm do ?

It helps you holding different objects in various positions - my drawing is NOT showing the vise/clip to hold the object though !

oh ok - does the vise clamp go where that little ball is? that's the part that did not make any sense to me.

ksor
09-07-2015, 09:58 AM
oh ok - does the vise clamp go where that little ball is? that's the part that did not make any sense to me.

Yeah, my drawing is a little misleading - the upper "plate" (= looks like an upside down umbrella !) is a plate for mounting a baby vise - and I'm not making this plate, because I have a filing clamp I want to use instead - so I have to figure out how I can fix it to the stud on the pivotting ball.

ksor
09-09-2015, 09:47 AM
Turning of a brass bowl to block the pivotting ball - the next part in the PowerArm project !:ddb:

Unfortunately ... no, fortunately I had to make some more equipment for my ball turning jig to do it ! :loco:

More details here in danish but you can Google Translate to the right just under the menu line - choose whatever language you like in the combobox:

Look down on the site !

http://kelds.weebly.com/power-arm.html

Hope you enjoy !

A.K. Boomer
09-09-2015, 10:24 AM
FWIW - for whatever type of clamping system used far greater holding force will be achieved if you make the ball pivot slightly larger than the cups, this will keep the cups gripping at the outer parameter of the ball and also give a self wedging effect, same size everything will not achieve this.

ksor
09-09-2015, 10:40 AM
FWIW - for whatever type of clamping system used far greater holding force will be achieved if you make the ball pivot slightly larger than the cups, this will keep the cups gripping at the outer parameter of the ball and also give a self wedging effect, same size everything will not achieve this.

Yeah, I thought about that when I saw the scratch marks from the ball in the bottum of the bowl ... I can do it now by milling the bottum og the bowl away with a 12-14mmŲ endmill - right ?

A.K. Boomer
09-09-2015, 10:52 AM
If your talking about just making a center recess and leaving a thinner outer ring then Yes that would be ideal and ensure proper function for along time,

little engineering in this area can yield great results

ksor
09-09-2015, 11:08 AM
If your talking about just making a center recess and leaving a thinner outer ring then Yes that would be ideal and ensure proper function for along time,

little engineering in this area can yield great results

Yeah, that's what I mean - thx for your responce !

EddyCurr
09-09-2015, 11:25 AM
ksor, please take the following with a dash of humour


What does this thing do?

Mainly it confuses people.

Speaking for myself. When I first noticed the thread title, I thought 'COOL' !
Someone started a thread about building a copy of the Power Loader (http://www.instructables.com/id/Life-Size-Power-Loader-Costume-from-Aliens/) used
by Ripley (Sigourney Weaver's character) to battle the deadly Alien Queen
in the 1979 film classic, 'Alien'.

Nope.

When I read the description in the OP, I thought maybe this is a variation on
John Stevenson's parallelogram hymn book holder (http://bbs.homeshopmachinist.net/threads/35863-what-to-do-with-this?p=458764&highlight=parallelogram#post458764).

http://www.stevenson-engineers.co.uk/files/tappinghead1.jpg

Nope.

Then when I clicked the link in the OP, I realized that the build is an HSM varient
of work holding tools developed by the PanaVise Products company and widely
marketed by electronic components companies. Like their Model 301 (https://www.panavise.com/index.html?pageID=1&page=full&--eqskudatarq=2):

https://www.panavise.com/img_products/large/301large.gif

At least I think so ...

.

EddyCurr
09-14-2015, 11:34 AM
ksor

I apologize.

On reflection, my previous post (2015.09.09 09:25) is none of the following:

humorous
informative
helpful
supportive or encouraging
considerate of those whose first language may not be english

Here is to continued success with your work on this Power Arm project
and to the HSM work you pursue in the future.

.

ksor
09-14-2015, 12:06 PM
ksor

I apologize.

On reflection, my previous post (2015.09.09 09:25) is none of the following:

humorous
informative
helpful
supportive or encouraging
considerate of those whose first language may not be english

Here is to continued success with your work on this Power Arm project
and to the HSM work you pursue in the future.

.

??? ... apologize ... - for what - I used to a much more tough environment ;-))

Doozer
09-14-2015, 12:55 PM
How much power does it have?

-D

mars-red
09-14-2015, 01:07 PM
KSor, that is some very nice work! Thanks for sharing it with us. :)

Paul Alciatore
09-14-2015, 01:26 PM
Not to rain on your parade, but perhaps illustrate the usefulness of such a mount.

I have a $15 E-bay vise with a ball mount. It can be turned to any angle and locked. It sits, clamped to the edge of my electronic bench, next to my desk here in my office. I use it all the time for soldering and other tasks on electronic items. It has 3" / 76mm wide rubber jaws. I find it very useful for holding small, light items.

ksor
09-14-2015, 02:18 PM
Not to rain on your parade, but perhaps illustrate the usefulness of such a mount.

I have a $15 E-bay vise with a ball mount. It can be turned to any angle and locked. It sits, clamped to the edge of my electronic bench, next to my desk here in my office. I use it all the time for soldering and other tasks on electronic items. It has 3" / 76mm wide rubber jaws. I find it very useful for holding small, light items.

If it's fun to make and you can do it ... then I would do it ... it's not at all a matter of you can or can not buy it.

ksor
09-14-2015, 02:21 PM
How much power does it have?

-D


The last week I've been sick and therefore not in the shop so I've not finishe all the parts yet - but when I have I'll try to work out a test to measure it's streight - if I can !

EddyCurr
09-14-2015, 04:35 PM
??? ... apologize ... I am pleased that you were not put off.

Still, I consider it an out-of-character post on my part.

Besides creating a useful tool for your shop, I think your
Power Arm project will help develop skills and knowledge
that will be useful down the line.

Regards

.

ksor
09-14-2015, 04:46 PM
Yeah, you're just right !

ksor
09-19-2015, 10:17 AM
Now the last parts and adjustments are made in this project ! :)

More details here in danish but you can Google Translate to the right just under the menu line - choose whatever language you like in the combobox:

Look down on the site !

http://kelds.weebly.com/power-arm.html

Hope you enjoy !