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Cement Saws for in situ fossils- Are they any good?


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Biotalker

Hi, I have been looking to buy a gas cement saw for fossil extraction and as you know they are pretty expensive. Now on online, online, amazon, walmart and elsewhere, I see a lot of relatively cheap $340-380 gas powered cement saws (12"blades) being advertised.

2 Stroke 32.6cc Gas Power Cement Masonry Concrete Cut off Saw Air cooling 1200W

The company in the Amazon ad is LoyalheartDY?? (another ad in Amazon has Tbvechi as make with 14" blade but otherwise similar).  Does anyone know anything about these saws? or bought one and used it?

Does anyone have advice on any other cement saws?

cement saw.jpg

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Wrangellian

I've used them on shale and sandstone (rented, never owned one). They do work at extracting fossils from places you couldn't otherwise, or for trimming down big blocks that are too big and solid for the rock saw or hammer/chisel/etc, and often better than hammer+chisel as the latter can cause unpredictable fractures more than a controlled cut will. I would not say they are easy to use, and I couldn't provide a review of the different makes and models. Tricky to cut shale with them as it tends to splinter, but if you trim well away from the fossil and if possible stabilize (glue) the area you don't want to fracture, it can work.

Of course they create a lot of dust and you need a mask, unless you have a water source for cooling but that's not always possible out in the field. Also if you're not careful the blade can suddenly bind and get bent, and the good diamond blades expensive to replace! (I tried the carborundum type on sandstone and they are useless, they just heat up and spit out bits of lava. You need a proper diamond blade).

Edited by Wrangellian
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Bob Saunders

Available parts and service? How long will a blade last if used dry? Where will you use it, and are they allowed on Government owned land, where a long pry bar may not be allowed? And at least one state no longer allows the sale of 2 stroke items like leaf blowers. All of what I would consider if looking to buy one and unlikely too ever need one but that's just me. So maybe someone here does own the model shown and will reply.

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DPS Ammonite
21 minutes ago, Bob Saunders said:

Where will you use it, and are they allowed on Government owned land, where a long pry bar may not be allowed? 

Power tools not allowed to casually collect fossils on BLM and US Forest Service lands without a permit that is given to professional paleontologists.

 

https://www.ecfr.gov/cgi-bin/text-idx?SID=7b7796f0ea8fbf9aa22cf76da4fb5d09&mc=true&node=pt36.2.291&rgn=div5#se36.2.291_15

 

 

https://www.blm.gov/policy/im-2012-140

 

 

Edited by DPS Ammonite
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Im sure youve heard of the saying, "you get what you pay for".  I payed $1250 for mine 10 years ago.  Still works and ive used it many many many times on many many many trips. 

 

RB

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Fossilis Willis

I'm inclined to agree with @RJB as far as getting what you pay for. Having said that, I have seen used high quality saws on sites where folks in your area "offer up" things for sale in roughly the same price range you're looking at. Many look to be in good condition, and are brands that are serviceable. Personally I would rather spend my money on a quality second hand saw than a new saw of questionable quality. Also, I will echo @Wrangellian when it comes to wearing a dust mask, and add safety glasses and hearing protection are a must. 

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  • JohnJ changed the title to Cement Saws for in situ fossils- Are they any good?
Malcolmt

I have a stihl and it still works as good as the day it was purchased and I am not particularly gentle with it. My opinion they make the best gas saws in the world. Look for a used Stihl

 

 

772355986_Plateofcrinoids.thumb.jpg.6d5f2ebe896f90ac8ca577503102db0d.jpg

 

 

Edited by Malcolmt
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caterpillar

Here mine. A Makita machine. Very strong and effective

 

IMGP9228.JPG.d28cb83dba45c733b4e922e317bab991.JPG

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5 hours ago, caterpillar said:

Here mine. A Makita machine. Very strong and effective

Makita is right up there with Stihl.  A very good saw.  I have one, my youngest son has 3 Stihl's.  I will say though, the new Stihl my son bought is very compact compaired to my old Makita.

 

RB

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caterpillar

Sure, but it is with the old jars that we make the best jams :D

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