jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 9, 2018 6:51:35 GMT -5
Newer models - 757 Ultralight and Euro offer higher power as well as fiber optics, and triple port spray. These handpieces can also be purchased to accomodate the Kavo Multiflex Coupler, as more and more companies attempt to attract loyal Kavo customers. Like the lighter Kavo handpieces, these also have a tendency to dent when dropped on hard surfaces, so it need not be said that care should be taken here.
Summary: Power - 13 watts Noise - 67 dB Speed - 420,000 rpm @ 36 psi (2.5 bar) Spray- Single Warranty - Turbine - 2 year, Fiber Optics (if applicable) 5 years. LARES 757 DEALS ON EBAY
Lol, 420,000 RPM. That is smoking fast. At only 36psi !
|
|
NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,630
|
Post by NRG on Oct 9, 2018 12:45:56 GMT -5
jamesp 36psi what is CFM? I am sure you have enough. But others may not?
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 9, 2018 17:51:01 GMT -5
jamesp 36psi what is CFM? I am sure you have enough. But others may not? Cubic feet per minute. Air tools are often rated by their air consumption = cfm
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 9, 2018 18:26:07 GMT -5
I drilled 3 holes and my Dremel went up in smoke lol.
3mm holes took 25 seconds !!
|
|
|
Post by Pat on Oct 9, 2018 18:34:11 GMT -5
James, use a Foredom, and do it under a little water. Fordoms are s lot tougher. Good luck!
You can also use a drill press with a core drill. In water
|
|
NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,630
|
Post by NRG on Oct 9, 2018 19:12:52 GMT -5
jamesp 36psi what is CFM? I am sure you have enough. But others may not? Cubic feet per minute. Air tools are often rated by their air consumption = cfm Yes, what is the specifications for this tool in CFM
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 10, 2018 20:11:40 GMT -5
James, use a Foredom, and do it under a little water. Fordoms are s lot tougher. Good luck! You can also use a drill press with a core drill. In water That's what worked here Pat. A Dremel set at 25,000 RPM and drilled underwater. Worked kiln a charm. Thanks
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 10, 2018 20:14:29 GMT -5
Cubic feet per minute. Air tools are often rated by their air consumption = cfm Yes, what is the specifications for this tool in CFM It can not be much being such a small turbine powered air tool. i'll see if I can find a dental drill's consumption. Should be no challenge for even the smallest of compressors. At up to 450,000 RPM it may take a serious filter and lubricator though. Could not find consumption, probably because it is less then 1 cfm. Meaning any compressor could drive it. But it might take a special regulator, the operate on 20 to 40 psi. An odd pressure range for air tools. It may require a medical grade compressor with FDA acceptable lubricants, I would be certain of that if drilling in a human's mouth. But not a concern drilling jewelry materials.
|
|
|
Post by TheRock on Oct 10, 2018 22:30:43 GMT -5
36 psi is not that much very much very low CFM usage. You need a Moto Tool like one of these 60,000 1/8" shaft
|
|
NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,630
|
Post by NRG on Oct 10, 2018 22:51:44 GMT -5
Yes, what is the specifications for this tool in CFM It can not be much being such a small turbine powered air tool. i'll see if I can find a dental drill's consumption. Should be no challenge for even the smallest of compressors. At up to 450,000 RPM it may take a serious filter and lubricator though. Could not find consumption, probably because it is less then 1 cfm. Meaning any compressor could drive it. But it might take a special regulator, the operate on 20 to 40 psi. An odd pressure range for air tools. It may require a medical grade compressor with FDA acceptable lubricants, I would be certain of that if drilling in a human's mouth. But not a concern drilling jewelry materials. Dental drills are generally short lived as they are meant to be used dry. No lubricant oil in the airstream. You don't have this limit. Good luck and thanks for trying for me.
|
|
|
Post by TheRock on Oct 11, 2018 0:08:48 GMT -5
It can not be much being such a small turbine powered air tool. i'll see if I can find a dental drill's consumption. Should be no challenge for even the smallest of compressors. At up to 450,000 RPM it may take a serious filter and lubricator though. Could not find consumption, probably because it is less then 1 cfm. Meaning any compressor could drive it. But it might take a special regulator, the operate on 20 to 40 psi. An odd pressure range for air tools. It may require a medical grade compressor with FDA acceptable lubricants, I would be certain of that if drilling in a human's mouth. But not a concern drilling jewelry materials. Dental drills are generally short lived as they are meant to be used dry. No lubricant oil in the airstream. You don't have this limit. Good luck and thanks for trying for me. Jade Carver told me all the Hot Shoes use the MOTO TOOL type units that I posted. He wanted like upwards of 1,600.00 for his he sells I looked and found this one on Flee Bay and still paid too much Aliexpress sells it must cheaper make sure you get the 1/8 collet. They are brushless so they dont get hot like a foredom. Ihave a foredom too. This thing is not a Toy if you start it at 60,000 it will bend and curl the 1/8" bit like a pretzel. It has alot of torque. It will need water for the diamond bit. I will be praying for Brother Jim because he lives in ATLANTA right around the Hurricane so I hope he will be okay! Prayers Sent
|
|
|
Post by TheRock on Oct 11, 2018 1:47:50 GMT -5
Newer models - 757 Ultralight and Euro offer higher power as well as fiber optics, and triple port spray. These handpieces can also be purchased to accomodate the Kavo Multiflex Coupler, as more and more companies attempt to attract loyal Kavo customers. Like the lighter Kavo handpieces, these also have a tendency to dent when dropped on hard surfaces, so it need not be said that care should be taken here. Summary: Power - 13 watts Noise - 67 dB Speed - 420,000 rpm @ 36 psi (2.5 bar) Spray- Single Warranty - Turbine - 2 year, Fiber Optics (if applicable) 5 years. LARES 757 DEALS ON EBAY Lol, 420,000 RPM. That is smoking fast. At only 36psi ! Pretty Neat Jim, I looked Into It A Little By looking at this I was able to determine what it is. It must have a airhose like an airbrush I do have an Air Dryer in my shop I just would need an Inline Oiler Of course I will Use AMSOIL synthetics because they are the 1st in SYNTHETICS.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 4:29:24 GMT -5
NRG TheRock grumpybill fernwood PatIt appears torque is more important than RPM for 2mm and 3mm flat faced diamond bits. SO, this "need for high RPM" thing was a bit misleading. Diamond bits that are 2 to 3 mm apparently need more torque probably due to their flat face. Adjusting the Dremel from 5000 to 30,000 RPM made a difference in cutting rate. But the biggest difference in cutting rate is shear down pressure and torque to maintain 5000 to 30,000 RPM. Drilling 1/4" to 5/16" "glass tumble pre-forms" allows a lot of down pressure due to their mechanical strength. The blunt end on cheap bulk pack diamond drills limits their ability because the center of the drill bit is not grinding fast. Hollow end bits(core bits) may be available in 2 to 3mm sizes, not sure. Certain they would cut way faster. Because of their hollow center. Any way, I am cutting 3mm holes in less than 30 seconds in untumbled 1/4" to 5/16" thick glass pre-forms cut for tumbling. And that is an adequate speed. The bit lasts about 30 holes in 1/4" glass on first batch. Maybe some type of cutting oil dripped on to the drill bit would improve cutting rate and bit life. But it would likely be messy. Why not use 1.2mm or 1.5mm bits ? They cut way slower and required actually more down pressure which resulted in way more breakage. I would say the reason for that is as you move closer to the center of a flat faced bit you have way less surface speed. And the increased point source load due to the down pressure on a much smaller diameter drill bit. They wear out faster for reasons stated above.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 4:43:42 GMT -5
Perhaps faster holes could be drilled with a smaller diameter high speed bit with say a ball ended bit. And the hole was "whittled" or "carved" instead of drilled out. Like a dentist excavating a hole in a tooth.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 5:03:47 GMT -5
At a higher price core bits are available in 1 2 3mm. Hopefully they have sintered cutters, they may be electroplated - not sure. It would come as a surprise if the core would stay intact and have to be removed on such small bits. These are certainly worth a try since they are drilling along the perimeter of the bit and not solid faced. From a UK site: Quantity Purchased Price 1 - 4 $8.11 5 - 9 $7.09 10 - 24 $5.59 25 + $5.04
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 5:07:14 GMT -5
sintered ? not sintered ? No idea. You can bet these will cut way faster as long as the center hole does not get plugged with the core.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 5:11:50 GMT -5
Found and ordered these on EBAY. $6 for 10 units.
|
|
NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,630
|
Post by NRG on Oct 12, 2018 5:27:35 GMT -5
"Electroplated"
I used those to drill in 20mm granite, under water a in a drill press. The core did not survive. I could drill 1 hole per bit. I was way to slow an RPM on the press.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 6:07:42 GMT -5
"Electroplated" I used those to drill in 20mm granite, under water a in a drill press. The core did not survive. I could drill 1 hole per bit. I was way to slow an RPM on the press. I drilled 3/8" holes in coral using core bits on a drill press and had similar '1 bit per hole' results. Glass is really a different animal when it comes to sawing with diamond blades: 50 inches per second blade speed w/oil on a rock saw cutting Mohs 7 agate. Low feed rate 175 inches per second blade speed w/water on a tile saw cutting glass. High fed rate. Both with long blade life. 2 different animals. To drill a 3mm hole thru 1/4" of glass at 10,000 RPM is also much different than cutting a 3mm hole thru 1/4" of agate. If I remember right I had to slow the bit down to get much life out of the drill bit when drilling agate. Thinking out loud here. I am content with 3mm holes in 25 seconds in 1/4" glass at 10,000 RPM. Very satisfied. Can live with that.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,178
|
Post by jamesp on Oct 12, 2018 6:18:09 GMT -5
I'll try the core bits on the glass.
|
|