lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 2, 2015 19:38:23 GMT -5
I've got a bunch of slightly used 7" MK blades with a 5/8" center hole. All have 3/8" or more original diamonds. They MAY be 303's and need to be run in oil. I believe they were used on demo saw. $10 each plus First Class shipping for 9oz - more than one? No additional shipping. 32 gone - 8 still available.  Lee #1 |
|
|
|
Post by deb193redux on Apr 2, 2015 19:55:14 GMT -5
what MK # are they?
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 2, 2015 20:32:28 GMT -5
Don't remember, had them for a few years, but, if I read my micrometer correctly, they have about a .068 kerf and .050 "body" so they might be 303's. I have 20 to sell. I see that IF they are 303's, they need to be run in oil, not water.
Lee #1
|
|
|
|
Post by braders on Apr 2, 2015 21:54:13 GMT -5
When ya said demo blades I thought ya meant DEMO blades lol !!
I'm used to 14-24 inch on demo saws what do they use 7in on ??
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 4, 2015 7:20:15 GMT -5
20 going out today;...20 left. (I'm keeping a few for myself)
Lee #1
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 6, 2015 7:42:41 GMT -5
Still have 18 blades left to go!
Lee #1
|
|
|
|
Post by johnjsgems on Apr 6, 2015 10:43:13 GMT -5
Lee,
I'm guessing they are tile blades. When I first became a dealer I toured the old BD plant (Formerly Star Diamond blade factory). While there they gave me two boxes of 7" slightly used 7" tile blades to sell for $10 ea. They had maybe 20 boxes on a shelf (each box had 50 blades). They told me they sold 7" tile saws to Home Depot. After people did there little tile project they would return the saw and MK had to refund Home Depot. After losing a million dollars they stopped selling small saws to Home Depot. The saws were cleaned and sold as "reconditioned" after installing a new blade. The used blades if not very worn were saved. Of the 100 I sold I would guess two thirds sold in multiples for making "poor man grinders", ganging 5-8 blades. They were good quality tile blades but not 303 lapidary blades.
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 6, 2015 11:12:06 GMT -5
I hope you are right. I don't want to run these in oil. I believe they do have are narrower than a regular tile blade.
Lee #1
|
|
|
|
Post by johnjsgems on Apr 6, 2015 16:46:39 GMT -5
There may be a blade number stamped in blade on other side. You can use water (or water soluble) on any 303 blade as well. The core will rust quickly if left in water so you need to drain and dry blade after use. BD/MK was supposed to change their instructions to say something like oil is preferable but they may not have. They put 301 blades (same core as 303) on their version of the MK 10" tile saw which is water only. Core on all their tile blades looks the same to me too. You will get better cooling with oil so I would recommend oil for blades over 10". BD plated everything (except blade) on their big saws so test labs, etc. can use water in them. If you can find a number stamped in core it would help to identify it. Arrow looks right for tile blade. 303C arrows are much smaller.
|
|
|
|
Post by deb193redux on Apr 6, 2015 17:04:43 GMT -5
|
|
|
|
Post by johnjsgems on Apr 6, 2015 20:28:45 GMT -5
If they are the same tile blades I was selling they are very high quality. I had one on my MK170 for a tile job for a relative. I couldn't cut 18" tiles with it (because of saw design, not blade) so had to run to Home Depot for a 4" tile blade for my MK145. The Depot $20 4" blade chipped the edges. The 7" MK did not.
|
|
|
|
Post by catmandewe on Apr 6, 2015 20:50:18 GMT -5
I have several boxes of these blades, some are tile blades and if you hold them just right you can still see the QEP on some of them, there are others in the box that are obviously different blades and they have no evidence of the QEP logo so there are probably a few different places these came from.
Tony
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 7, 2015 7:37:09 GMT -5
John - what would be the difference between these blades and the lapidary one if the width of cut is the same? The 303 blades have a .050 body and I'm guessing a .06-70 kerf.
Lee #1
|
|
|
|
Post by johnjsgems on Apr 7, 2015 10:26:42 GMT -5
They use the same diamond. The real difference is the hardness of the matrix. They use varying matrix hardness depending on material to be cut. A low end tile blade will have a very hard matrix for durability. The lapidary end would have a softer matrix to more readily expose the diamonds to the rock for a fast smooth cut but does cause them to wear out faster. I've seen three year old mega grinders made with cheap tile blades at a club work shop, heavily used and abused, showing no wear. The same blades would take a very long time to slab a rock. MK makes many different tile blades. Some work very well for rock cutting. Some make great grinders.
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Apr 15, 2015 7:06:57 GMT -5
Bumping this - I still have 8 blades left to sell.
Lee #1
|
|
