rockncajun
spending too much on rocks
Member since September 2009
Posts: 344
|
Post by rockncajun on Dec 26, 2009 10:06:10 GMT -5
Here's my problem. I have a 10" self feeding saw. I have burnt up 2 motors and numerous belts. If I leave the belt loose, it gets burnt up. If I tighten it, I burn the motor. I think my problem is cheap saw blades. They cut good when I first get them but after a short time they don't seem to cut as good. Jaspers are not so bad, but agates drive me crazy! If you agree with me could you suggest a good blade that will last. Ray
|
|
|
Post by rockmanken on Dec 26, 2009 10:45:57 GMT -5
Ray, get a fire brick and use it to sharpen(clean) the blade by cutting a couple of slices of it. Agates take twice as long, or more, to cut than anything else except pet. wood. Your feed may be too much or you could be cutting with too fast a blade speed. A lot of variables. Ken
|
|
rockncajun
spending too much on rocks
Member since September 2009
Posts: 344
|
Post by rockncajun on Dec 26, 2009 11:03:10 GMT -5
Hey Ken That is good to know. I didn't think my blade speed could be too fast! But I need a new blade anyway. Ray
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,472
|
Post by Sabre52 on Dec 26, 2009 11:08:11 GMT -5
If your saw runs fast, try a good MK or Barranca continuous sintered rim blade. Continuous rim blades work best at higher speeds, cut faster and smoother and generally work pretty well. Otherwise the really high grade notched rim types like the BD and MK 301 would be your best bet for agates. 10" blades of this type run about 80-$100. The continuous rims about $75-80.....Mel
|
|
rockncajun
spending too much on rocks
Member since September 2009
Posts: 344
|
Post by rockncajun on Dec 26, 2009 11:39:20 GMT -5
OK, now part 2 question--------What rpm would be fast---what rpm would be slow?
|
|
|
Post by johnjsgems on Dec 26, 2009 13:24:45 GMT -5
Most 10" lapidary saws run at 1725 rpm. Diamond Pacific says10" should run from 950-2200 rpm. The faster the blade the faster it will dull or glaze over. That means more frequent dressing and faster wear. With auto feed there is no reason to hurry. If you can't find something else to do while the saw is gently cutting you can come over and help me. I've always got plenty to do while my saw is running. If your feed rate is adjustable run it at slowest also. Tile blades typically are designed for faster saws cutting softer materials. The 303 and 301 blades Mel mentioned are designed for the upper limits of the chart. They are selling their 10"tile saw with a 301 blade this Winter and say it works great running at 3200rpm.
|
|
rockncajun
spending too much on rocks
Member since September 2009
Posts: 344
|
Post by rockncajun on Dec 26, 2009 20:18:08 GMT -5
My feed is not ajustable. My theory was- the faster the blade turns the more material it will cut, therefore the feeder would not be rushed. That is why we have these forums( to help people like me.) Thanks for the advise. I can control my blade speed with my pulley sizes and order a new blade. Ray
|
|
spicer m
spending too much on rocks
Member since October 2008
Posts: 337
|
Post by spicer m on Dec 26, 2009 20:58:09 GMT -5
I use the MK303. I buy my 10" blades from John at J&S Gems. Phone# 909-519-1545 He is very helpful and fast shipping. Mike
|
|
jcinpc
has rocks in the head
Member since April 2009
Posts: 722
|
Post by jcinpc on Dec 27, 2009 0:02:02 GMT -5
|
|
|
Post by sandsman1 on Dec 27, 2009 5:04:33 GMT -5
|
|
|
Post by johnjsgems on Dec 27, 2009 10:36:22 GMT -5
I'd recommend the .040" blade #153696.
|
|
jcinpc
has rocks in the head
Member since April 2009
Posts: 722
|
Post by jcinpc on Dec 27, 2009 11:19:32 GMT -5
that blade is .032 the 1 I bought is .060. I was using a .040 but the feed tray on the old HP kept binding at 1 inch in the cut so I though maybe a thicker blade would do better
|
|
|
Post by johnjsgems on Dec 27, 2009 11:58:03 GMT -5
.032" is a little flexible to use with power feed. .060" loses a lot of material. .040" should work great. You might try dressing blade and making sure carriage is alligned properly. If you are cutting agates dressing blade (cutting a dressing stick, etc.) every 6 or 8 cuts is not unreasonable.
|
|
|
Post by sandsman1 on Dec 27, 2009 20:40:55 GMT -5
i was having a prob with binding and i changed out the 1/2 hp motor for a 1 hp on my 14 inch lortone panther saw and i can cut anything i can fit in the vise now with no binding i did the same with my lortone 10 inch when i had it from 1/4 to 1/2 and that stoped too -- it seems they put them out with under powerd motors if you ask me -- if it keeps hapening id look into a bigger motor -- i went through alot of blades befor i fig it out seems the power feed was pushing faster then the blade could keep up with so the extra torq in the bigger motor took care of that -- and the speed stayed the same for the blade
sorry i didnt notice the kerf size i wouldnt have posted that linc -- good luck
|
|