![]() You need to bleed out the water in the tank every few days when the garage temp is above the Dew Point. Oil in the lines will ruin that equipment. This one is oiless as I have high end abrasion equipment as well. I have tried other brands over the years and this one is the best at the $500 Canadian price point. It is in the garage and a 100 foot line takes the air into my basement prep lab. Most weeks I do 20 or more hours of prep using compressed air. You can still buy o-rings, springs and stylus so as long as the bushing is not badly worn you can make any used and working one close to new. Original AROs come up from time to time on online, that where I got mine both used in the $200 range. You need to look at a chart that shows for that compressor how many CFM it delivers at each PSI range. Also, the compressor above is listed at 9.6 cfm. Could you please point me to somewhere where I could find one? Thanks. Thanks, I’ve never been able to find an original ARO before. On my list to buy one of these days are HW10, HW322 Ingersoll Rand EP50 (my normal bulk tool but lots of vibration transferred to fingers) ![]() Paleotools MicroJack 2 (Very fine detail but must use with air blower as does not blow away dust that it creates, very expensive)īritish Sealy (good for bulk matrix removal and not very expensive) Pferd MST-31 (my most used scribe, very expensive, Stylus are expensive and do not last long) Modified Original ARO 8513 with longer stylus I believe if you are only going to own 1 scribe then the best first purchase is an Original American ARO (not the Chinese clone as they do not last). Some of the more expensive scribes work in the 50 PSI range and the most expensive can run down around 20 PSI. Most lower cost scribes run best at 90 to 110 PSI. Must be capable of approximately 5 CFM at 110 PSI. If it is only ever going to be scribe then either is good. Must be oil free if you ever are looking at getting into air abrasion. For example this one: also, oil or oil free? Would a 50 litre compressor work well? Sorry for all the questions everyone. I agree with if you have to scrimp on cost, save your money a bit longer and buy something that will work well. Minimum capacity just wears out your equipment. I wouldn’t recommend a smaller compressor (even though I proposed a “minimum size” as above). I have to run it at 1/2 power due to air consumption. This will run everything I use at full capacity except for my Super Jack. This cycles every 10-15 minutes and recovers in about 2 minutes. I run a 2.5hp, 4.7cfm compressor with a 21 gallon (79.5L) tank. I opened it up and the front end was full of shrapnel! You can’t get details worked out with the stock stylus. I worked it hard for a few years and it suffered a catastrophic piston failure. It worked well for bulk removal but that’s all. Of the 3, I only have experience with the CP9361. You will need it to get into the umbilicus effectively. This is better than the other two am I right? Thanks, the description of the dnsons says that it can run from 55 to 90 PSI. You will still have to stop every 5 minutes or so to let the compressor catch up (not a good scenario)." I'll quote our prep pro Kris ( on this point: " If you are going to run a small air scribe, a compressor running at 90psi and around 3cfm with a 20L tank is the smallest you can use with any success. ![]() Anything less than a 20 gallon tank is going to be turning on quite often, reducing its longevity. In terms of air compressor, the bigger the volume you can afford, the better. It actually favours around 100-110, from what I've heard from others, but I'm able to dial down my ME-9100 to 70. The minimum you should be running the CP 9361 is about 90 PSI. It will move a lot of tougher matrix, but not the best for very fine work (although it can be done in a pinch, but not recommended without some experience). The CP 9361 (the middle one pictured above) is more the workhorse of tools, comparable to PaleoTools' ME9100. I would think the longer stylus would be a bit more helpful to get into tighter spots on the ammo whorls.
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