jerrys
spending too much on rocks
Member since February 2014
Posts: 263
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Post by jerrys on Feb 21, 2014 1:12:54 GMT -5
I recently purchased a drag saw with a new 6 foot diamond blade. The saw is homemade. The original owner did not complete it due to health problems. I want to verify the gearing and construction before using it. What length should the stroke be and how fast?
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GeorgeStoneStore
starting to spend too much on rocks
Member since November 2011
Posts: 168
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Post by GeorgeStoneStore on Feb 21, 2014 1:41:16 GMT -5
please share few photo
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Post by catmandewe on Feb 21, 2014 3:02:05 GMT -5
The stroke should be as long as you can make it and it goes pretty slow. Photos would be great!
Tony
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Feb 21, 2014 7:37:46 GMT -5
Would like to see some pics of that.thinking of fabricating one myself.there is a good video on YouTube,of one cutting a petrified log
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Post by johnjsgems on Feb 21, 2014 10:22:47 GMT -5
I have a home made one here I picked up without the diamond blade. It has the old metal bar used with grit. Anybody local wanting a project?
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Post by catmandewe on Feb 21, 2014 11:10:54 GMT -5
I have a home made one here I picked up without the diamond blade. It has the old metal bar used with grit. Anybody local wanting a project? OOOh OOOOOOhhhhHHHHh OOOOOHHHHHHH, pick me, PICK ME!
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Post by Rockoonz on Feb 21, 2014 12:15:31 GMT -5
johnjsgems Local or Loco? jerrys is it the same one as posted on facebook? If so it looks fairly complete, and with all the speed reduction in the belt, gearmotor and chain it should run plenty slow enough. At the sprocket that is directly attached to the blade I would want about 60 to 80 RPM or a little more than one full in/out stroke per second. The stroke length should not be too long, 12 to 18 inches would be reasonable. With a drag saw you have to multiply the stroke by 2 and add a foot then subtract the total from the blade length to learn the diameter of rock it can theoretically cut, so a longer stroke is not better. Remember with a drag saw you time the cuts with a calendar, not a watch. I will post a pic of J2B2's drag saw on facebook, photobucket is not being too agreeable right now. The Youtube Video...
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juzwuz
has rocks in the head
Member since April 2010
Posts: 526
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Post by juzwuz on Feb 21, 2014 15:56:51 GMT -5
I have a home made one here I picked up without the diamond blade. It has the old metal bar used with grit. Anybody local wanting a project? I'm not local but pictures would be appreciated. I'm still working on using my power hacksaw to cut rocks. forum.rocktumblinghobby.com/thread/61849/diamond-wire#page=1
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Post by Rockoonz on Feb 22, 2014 14:18:18 GMT -5
I have a home made one here I picked up without the diamond blade. It has the old metal bar used with grit. Anybody local wanting a project? OOOh OOOOOOhhhhHHHHh OOOOOHHHHHHH, pick me, PICK ME! Not enough projects Tony?
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Post by catmandewe on Feb 22, 2014 19:52:36 GMT -5
always room for a drag saw!
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Post by Rockoonz on Feb 23, 2014 1:10:01 GMT -5
True enough, you do have a few boulders lying around from what I hear.
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bhiatt
fully equipped rock polisher
Member since July 2012
Posts: 1,532
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Post by bhiatt on Feb 23, 2014 9:53:56 GMT -5
did they ever make it through the wood. Looks pretty slow goin.
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tombstoneoutlaw
off to a rocking start
It's all about Wood
Member since March 2014
Posts: 7
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Post by tombstoneoutlaw on Mar 1, 2014 10:15:52 GMT -5
Jerry, did the saw come from Pendleton? And post some pictures for us.....
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Mar 6, 2014 19:08:26 GMT -5
johnjsgems Local or Loco? jerrys is it the same one as posted on facebook? If so it looks fairly complete, and with all the speed reduction in the belt, gearmotor and chain it should run plenty slow enough. At the sprocket that is directly attached to the blade I would want about 60 to 80 RPM or a little more than one full in/out stroke per second. The stroke length should not be too long, 12 to 18 inches would be reasonable. With a drag saw you have to multiply the stroke by 2 and add a foot then subtract the total from the blade length to learn the diameter of rock it can theoretically cut, so a longer stroke is not better. Remember with a drag saw you time the cuts with a calendar, not a watch. I will post a pic of J2B2's drag saw on facebook, photobucket is not being too agreeable right now. The Youtube Video... I helped build this saw. It is located in Montesano Washington. Don
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Post by Rockoonz on Mar 7, 2014 1:04:14 GMT -5
rocpup you think maybe he has another one of those pump jacks lying around? That is a very cool saw.
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Mar 7, 2014 9:37:11 GMT -5
The last time I seen the saw was last summer and they were looking for parts for the pump jack. I built the frame and donated the motor for it. A lot of changes were made after we first got it going as a grit feed saw. My friends son made a lot of changes that I was not involved with. One of the improvements was to braze diamond onto the blade. That worked for awhile but as the blade worked down through it got narrower as did the cut. When new diamond was brazed on the blade it would no longer fit the cut. The saw is located forty miles from his home and could not be left unattended for long. As someone noted it takes days not hours to make a cut with a drag saw. Don
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Post by roy on Mar 7, 2014 9:49:05 GMT -5
The last time I seen the saw was last summer and they were looking for parts for the pump jack. I built the frame and donated the motor for it. A lot of changes were made after we first got it going as a grit feed saw. My friends son made a lot of changes that I was not involved with. One of the improvements was to braze diamond onto the blade. That worked for awhile but as the blade worked down through it got narrower as did the cut. When new diamond was brazed on the blade it would no longer fit the cut. The saw is located forty miles from his home and could not be left unattended for long. As someone noted it takes days not hours to make a cut with a drag saw. Don you can purches the cutting blades for them i was told they were around 800 if interested i can get the adress for you
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Mar 7, 2014 14:09:46 GMT -5
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Post by Rockoonz on Mar 7, 2014 14:30:38 GMT -5
Thanks Don for the thoughts on the diamond brazing "rods". I have a freind who uses them for his sphere cups, they work great for that but it sounds like not so hot for a drag saw. We were thinking about going that route to save money but it sounds like buying the sintered cleats and brazing to the blade will be better. Thanks for the info. I have another rockhound freind who is looking into getting me a gang saw blade to use for a drag saw blade.
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Mar 7, 2014 20:56:25 GMT -5
Thanks Don for the thoughts on the diamond brazing "rods". I have a freind who uses them for his sphere cups, they work great for that but it sounds like not so hot for a drag saw. We were thinking about going that route to save money but it sounds like buying the sintered cleats and brazing to the blade will be better. Thanks for the info. I have another rockhound freind who is looking into getting me a gang saw blade to use for a drag saw blade. They had more problems with the diamond cleats falling off than using the brazing rod. Don
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