36/m/ny seeking used air scribe for long walks on beach

[DevonianDigger]

Hi everyone. Wondering if anyone out there is selling a used air scribe. I don't have a ton of cash available at the moment, but I could always include some trades in the deal. Doesn't have to be an Aro or a CP per se, just something I can use while I squirrel away enough to get the micro jack I'm after. My current tools work great on PD material, but won't work on the harder Moroccan material I've been getting in lately. Thanks in advance!

 

-Jay

[Phevo]

Since you live in the states there is a good scribe for around 100 US (see the other topic about it)

 

http://www.allairproducts.com/products/specialty-tools/

[DevonianDigger]

3 hours ago, Phevo said:

Since you live in the states there is a good scribe for around 100 US (see the other topic about it)

 

http://www.allairproducts.com/products/specialty-tools/

 

I'll check that one out. I just ordered a knock-off from India, going to see how that goes. Will report back, but I might give this one a try as well. Thank you!

[Ptychodus04]

The best advice I can give if you ordered a knock off Aro, buy the longer stylus from Paleo Tools. They are much sharper and the longer reach is invaluable.

[holdinghistory]

I think the guy who sells the knock off Aro (All Air Tools mentioned above) has the long stylus available as well for an extra charge. 

[holdinghistory]

BTW, I completely agree with Kris on that one too, you definitely want the longer stylus for the Aro. I was working on a trilobite today, and even the long stylus was just barely long enough to get at the matrix I was trying to remove. Any shorter and I would have had to remove a lot of extra matrix that I wanted to leave for overall presentation purposes. 

[Paciphacops]

The 8315-B Aro type tool from All Air Products, along with other Aro clones, come with a thinner stylus than the longer one offered by Paleo Tools, so if you order one from Paleo Tools, you will also need a new, larger bushing. You can read more info here, https://www.paleotools.com/which-tool-is-right-for-me. Below is the bit about the stylus diameters.

 

"The original stylus is .078" (2mm) in diameter. By going to the longer lengths of stylus, I increased the diameter to .093" (2.38mm) to increase the column strength of the stylus. This means that the Paleo Tools stylus will not work in the stock factory bushing as it is about .016" too small."

[Ptychodus04]

1 hour ago, Hal said:

The 8315-B Aro type tool from All Air Products, along with other Aro clones, come with a thinner stylus than the longer one offered by Paleo Tools, so if you order one from Paleo Tools, you will also need a new, larger bushing. You can read more info here, https://www.paleotools.com/which-tool-is-right-for-me. Below is the bit about the stylus diameters.

 

"The original stylus is .078" (2mm) in diameter. By going to the longer lengths of stylus, I increased the diameter to .093" (2.38mm) to increase the column strength of the stylus. This means that the Paleo Tools stylus will not work in the stock factory bushing as it is about .016" too small."

Thanks for sharing this. I actually had to replace my worn stock bushing at the same time as I replaced my stylus so size never came up in the discussion. They just sent me the correct sizes I needed.

[DevonianDigger]

Thanks for the info everyone! Once this knock-off gets in I am going to get some measurements on the various parts and see if I can replace any of its bits with better bits.

[Ptychodus04]

5 hours ago, DevonianDigger said:

Thanks for the info everyone! Once this knock-off gets in I am going to get some measurements on the various parts and see if I can replace any of its bits with better bits.

 

The cool thing about the Aro is the almost total lack of moving parts. There's a main air valve to turn on the flow and a spring in the bushing presses the base plate of the stylus against the body housing using an o ring to create a seal. The pressure builds up behind the base plate, overcoming the spring tension and pushing the stylus forward. Pressure drops and the spring pushes the base plate back creating the seal again, starting the process all over. The only real wear points are the o ring and the bushing and to a much lesser extent the spring.

 

I've been running my Aro for 15 years and have replaced the o ring twice and the bushing/spring/stylus once each. Keep it oiled (2-3 drops per 8-10 hours), run clean air through it, and periodically clean the main air valve and the o ring contact points and this scribe will last you a VERY long time.