Trying to Identify Unknown "Bits"

[TBurns]

I purchased a wooden shipping crate at a bankruptcy auction and some large bits were in it. I am having a tough time determining what they are and their use. Any help would be appreciated.

They were each wrapped in some oil proof paper and then in foam. One is about 36" long and weighs 30 lbs, the other is 48" long and weighs about 75 lbs.

There was a tag with the following on the outside of the oil paper for each respectively. These numbers bring up nothing when I Google them:
RSC437MAX1 (Idler Sub-Assy)
DSC437MA (Power Rotor)

I was initially thinking these were for ground drilling because of their size, but thinking otherwise now. I'm at a loss at the moment.

https://drive.google.com/file/d/0B9RUJR2chLdnUnZObE1VUHBESU5ranJGVXlsY1d6ZjVvQ0lr/edit?usp=sharing
https://drive.google.com/file/d/0B9RUJR2chLdnSXJsUE1aYXBQUHctVnZuY1BTYmg0NF8zNnRr/edit?usp=sharing
https://drive.google.com/file/d/0B9RUJR2chLdnSFppU2RoNGI4bDNwMjNTVllockdjLTZmZk9Z/edit?usp=sharing
https://drive.google.com/file/d/0B9RUJR2chLdnZWgzbWhpYldIVktRR3JLbGJaTThNazhGLURN/edit?usp=sharing


Thanks in advance.

[mvwcnews]

Since they have right & left "throw" starting at the center,  they don't really make sense as drilling tools.  How sharp are the edges of the "flutes?" Sharp enough to function as milling / surfacing cutters?

[TBurns]

The large one has almost rounded edges to the flutes. The 36" flutes have a slight edge to them, but I would not call them sharp by any means. I can run my fingers up and down them applying pressure and I am never concerned that I would be cut.

I was thinking of tooling/milling also on the smaller one since the end is completely flat with no point.

[Charles Garrett]

Don't think they are bits but shafts that take balls and are shafts that go min a housing with some sort of travestiog mechanism.   Chuck Garrett

[TBurns]

Thanks Charles, that actually makes sense in looking at them now. Wonder who I should speak with about them to try and determine who manufactured them and/or what they are used on. Any ideas?

[Charles Garrett]

Any markings on the crate would be the best shot.  To you they are scrap- in the right hands they are probably very expensive.  Chuck

[rusty]

(Idler Sub-Assy)
(Power Rotor)

You have 2 of the 4 important pieces to a positive displacement rotary screw pump :)

(I do not know whose tho)

[Billman49]

At first glance they look like some sort of spindle from a plastic injection moulder, or a food grinder, but the helices are evenly spaced, so no compression action - Rusty's idea as pump parts looks good to me - same idea, different medium....

[TBurns]

Very interesting all, I would have never gotten to that conclusion without your help. Thanks for all your knowledge!

There actually 2 - Idler Sub-Assy, but I only pictured one. So does that mean I have 3 of 4 of the pieces? What is missing? What are these types of pumps used for?

[TBurns]

If you look at the items in Fig. 4 here that is almost exactly like what I have:

http://www.pumpscout.com/articles-expert-advice/understanding-positive-displacement-pumps-aid89.html

Any one have a pump company they have worked with and would recommend I call?

[rusty]

The 4th part is the casing they go in. Those pumps aren't very complicated, they just have really weird parts in them ;P

I tried to find a part with that prefix, sometimes companies use the same prefix for all the same part for different machines, and you can guess the company because it is the one whose parts all start with the same letters.., but no luck. If you put them on ebay someone will probably know tho, it is amazing who pops up sometimes.

Those parts originally cost a fair amount of money because they are precision parts, but you have the disadvantage that the pump itself is expensive, and the parts are not guaranteed or tracable, you don't even know for certain they are new and not the old part taken out during a replacement.
That uncertainty means someone will not be willing to pay a lot for the part and also take a large risk of ruining an expensive pump to save a little money on a part:(
(Installing a bad rotor in a good pump gets you a bad rotor and a bad pump casing)

[Billman49]

This type of pump appears to match the type of rotors....

[TBurns]

Thanks Rusty and Billman, all good info. I really appreciate everyone's help on this!