General information about the Site

This lapidary and jewelry design community forum is dedicated to the novice, more experienced, and expert lapidaries and jewelry designers.

Forum cabochon in the Spotlight

Bob ( bobby1 ) shared this unknown druzy

Forum Jewelry Design in the Spotlight

John shared this beautiful pair of amethyst cufflinks

Forum Jewelry Design in the Spotlight

Mick B shared this stunning opal shell carving

Intarsias / Composites / Bead Making in the Spotlight

Kent shared this really nice Imperial Jasper pendant

Lapidary Related and Forum Member Shop Links

Brian Ababurko Silversmithing Classes / Rock Rollers Club

Dons Lapidary Arts

Idaho Rock Shop

Rare Rocks and Gems

Coyote Rainbow

Lightninghorse

Rocky Treasures

Talking Rocks

Fine Gem Designs

Idaho Rockman

Fine Woodwork and Lapidary

Darkstar Jewelry

DLC Gems

Teton Art Gallery

Art Cut Gems

Woman With A Torch

Lapidary Buy and Sell (Facebook Group)

Lapidary (Facebook Group)

Lapidary Equipment Marketplace (Facebook Group)


Lapidary / Gemstone Community Forum
April 24, 2019, 11:48:28 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News:
 
  Home Help Search Login Register  

Red Sintered Diamond Blades Trouble

Pages: 1 2 [All]   Go Down
  Print  
Author Topic: Red Sintered Diamond Blades Trouble  (Read 522 times)
James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« on: July 25, 2015, 10:28:24 am »

H!

I got some of these for my 6" Hi-Tech Trim Saw:

http://www.hitechdiamond.com/Red_Sintered_Continuous_Rim_Sawblade.html

and am really having troubles. I hardly put any pressure on the rock to cut it
and it just stops (jams) the blade from turning. If I run my finger along the edge of
the blade it is smooth. It cut only a tiny bit of the rock.

And the rock has only worn some of the red off the side of the blade.

Am I doing something wrong?

Do this type of blade need to be dressed?

Sorry if this is a dumb question but am a newbie at this.

Thanks,

James

P.S. The blade that came with the saw is fine. Cuts well.
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"

catmandewe
Hero Member
*****
Offline Offline

Gender: Male
Posts: 1159



WWW
« Reply #1 on: July 25, 2015, 10:44:47 am »

Does the arbor stop also or is the arbor spinning and the blade stops?

Tony
Report Spam   Logged





Get free shipping and/or discounts on products at Cabking by using the following link.
http://cabking.com/ref/IdahoRockShop/
James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #2 on: July 25, 2015, 10:49:33 am »

The arbor stops too.

I know that can't be good for the motor.

It doesn't stop/jam with the silver blade that came with it.

At the link I gave it shows a close up of the blade edge. Diamond showing.

My blade is solid red right up to the edge and on the edge.

Just a bit of red has now worn off in spots from rubbing on the blade (I gather).

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
jakesrocks
Hero Member
*****
Offline Offline

Gender: Male
Posts: 2107


New Toy.


« Reply #3 on: July 25, 2015, 11:36:52 am »

Check to see if the blade has a directional arrow stamped or printed on it.

Take the blade off & clean the flange washers & arbor real good before putting the blade back on. Even a tiny bit of grit between the blade & washers can cause the blade to run out of true & cause the blade to jamb.
Report Spam   Logged

A day spent without learning something new, is a day wasted.

Don

James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #4 on: July 25, 2015, 11:41:23 am »

I asked John at JS Gems about the direction. The silver blade has the arrow. The red ones do not.
John said Hi-Tech said they were non-directional.

I will check the flange washer and arbor.

Thanks!

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #5 on: July 25, 2015, 12:06:57 pm »

The flange washer and arbor are fine.

I tried again and tried to slice off a really thin piece of rock.
It sort of cut but the slice was so thin it kind of flaked off in little pieces.

It really wore off the red covering on the side of the blade.
And underneath it is really smooth to the touch.

The silver blade you can feel the diamond. Not really sharp but
a little rough. But the red one is super smooth.

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
55fossil
Sr. Member
****
Offline Offline

Posts: 268


« Reply #6 on: July 25, 2015, 12:48:16 pm »

     It sounds like you may just need to clean the front edge of your diamond blade.  They sell a blade sharpener at Diamond Pacific but a piece of any grinding wheel will work. Even a piece of sand paper might do the trick. If there is red paint then you are not getting to the diamonds. Start your saw up and cut the Silicon Carbide grinding wheel for a few seconds and see if the paint does not go away and expose diamonds to cut with. Another thought is if you have a piece of obsidian or other soft stone try and cut that. Obsidian will actually help clean a saw blade.

Question.  You said the arbor stops. Does the motor stop as well or is it a belt drive and the motor continues to run? If it stops the motor I would really question whether it is the blade or a weak motor. You really need to jam a blade up to stop a good motor.  Maybe if you have a friend in the area you could borrow another blade to try???   good luck,  Neal
Report Spam   Logged

James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #7 on: July 25, 2015, 01:10:07 pm »

The red paint has worn off. About a 1/2". That's what I was referring to when I said it is really smooth.
Both on the cutting edge, and on the side of the blade. Silky smooth. Can't feel any diamond
at all.

The motor keeps running. Just the arbor stops. Not for to long as I pull back on the rock right away.
Afraid it might burn out.

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
55fossil
Sr. Member
****
Offline Offline

Posts: 268


« Reply #8 on: July 25, 2015, 01:23:03 pm »

James;    Well, if there is no diamond exposed you need to get to it. Cutting a silicon carbide grinding wheel is the accepted method for fixing sintered blades. You can cut an inch or two into the SC wheel and it will remove any metal that is keeping the diamonds hidden. Do not thump a sintered blade with even a tiny hammer trying to expose the diamonds. That is for notched rim blades. You can usually see the diamonds with a magnifying glass or even opt visors.
Report Spam   Logged

catmandewe
Hero Member
*****
Offline Offline

Gender: Male
Posts: 1159



WWW
« Reply #9 on: July 25, 2015, 02:46:48 pm »

I got a red blade with my 30" saw that never did cut good, I replaced it with a 303P and the saw ran fine, you might have gotten one out of a bad batch.

Tony
Report Spam   Logged





Get free shipping and/or discounts on products at Cabking by using the following link.
http://cabking.com/ref/IdahoRockShop/
PhilNM
Hero Member
*****
Offline Offline

Posts: 657



« Reply #10 on: July 25, 2015, 04:52:35 pm »

Yep. return it and get a new one.
Report Spam   Logged

orrum
Jr. Member
**
Offline Offline

Posts: 96


« Reply #11 on: July 25, 2015, 05:21:18 pm »

He said he got some. Some to me is more than one so try another blade but cut the silicon carbide first l.
Report Spam   Logged
lithicbeads
Hero Member
*****
Offline Offline

Posts: 4924


« Reply #12 on: July 25, 2015, 05:28:35 pm »

Lots of good advice. If the diamond is buried  correct dressing may help . Quality control of lapidary tools is a thing of the past for the most part.
Report Spam   Logged

James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #13 on: July 25, 2015, 05:34:23 pm »

Yes, I got 2.

Will try the other one and see if it's the same.

If it is, I will e-mail John and see what he says.

Thanks,

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
vitzitziltecpatl
Hero Member
*****
Offline Offline

Posts: 695



WWW
« Reply #14 on: July 25, 2015, 10:08:01 pm »

The subject of painted saw blades has always confused me. How is it supposed to be good to paint a blade? Not just talking about the rim, but paint even on the core makes no sense to me.

Prevents rust? So - just take care of your blades and make sure they're left dry. The paint on the core below the rim just seems to take up room in the cut that could be available for circulating coolant. I always remove the paint. Less drag on the blade in my opinion.
Report Spam   Logged

James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #15 on: July 26, 2015, 07:00:02 am »

E-mailed John.

Will see what he says/suggests.

Thanks everyone!

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #16 on: July 26, 2015, 10:49:58 am »

O.K. John advised to dress the stone to get the paint off. Says he has seen that before.

Didn't have a dressing stone, brick, whatever so just cut another slice off a rock.
Took about 30 minutes going really slow but it took off most of the red paint on
the sides of the blade and, I gather, the edge.

Cut another slice and it worked fine. Cut good and no jamming.

Thanks again everyone for all the help.

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
johnjsgems
Hero Member
*****
Offline Offline

Posts: 924


« Reply #17 on: July 26, 2015, 02:15:57 pm »

Glad that worked but I am concerned about your report of arbor stops and motor still turning.  Only way that can happen is if the arbor adapter is loose on the shaft.  It should have an allen screw to lock it down.  Make sure it is tight.  The message you sent me indicated motor turning but blade stopped.  That sounded like blade nut too loose.  Or is it a case of motor and blade stopped turning but motor still making noise? 
Report Spam   Logged
James D. Farrow
Sr. Member
****
Offline Offline

Gender: Male
Posts: 281


« Reply #18 on: July 26, 2015, 03:21:25 pm »

Glad that worked but I am concerned about your report of arbor stops and motor still turning.  Only way that can happen is if the arbor adapter is loose on the shaft.  It should have an allen screw to lock it down.  Make sure it is tight.  The message you sent me indicated motor turning but blade stopped.  That sounded like blade nut too loose.  Or is it a case of motor and blade stopped turning but motor still making noise? 

The arbor did stop, but the nut was tight. So the motor must have stopped turning and just kept humming. Is fine now.

James
Report Spam   Logged

James D. Farrow
Mississauga, Ontario, Canada

"No more trains will be sold once the magazine leaves the station"
light house jack
Sr. Member
****
Offline Offline

Posts: 261


« Reply #19 on: July 27, 2015, 10:03:42 am »

On  the subject of blades, I was at the Franklin, NC show this weekend and manufacturer, Highland Park was there displaying their saws and other equipment.  Having an 18" Highland Park from the 60's I was curious to see how the quality compared. I was extremely impressed. In the side of the booth I noticed some Chinese made very heavy duty blades. I purchased a 24" blade for $150.00 on faith after seeing how everything else was made. I have both Covington and original Highland park saws in everything from 10" up and I know quality when it comes to saws. I would not hesitate to recommend any of the equipment from Highland Park.
Report Spam   Logged

vitzitziltecpatl
Hero Member
*****
Offline Offline

Posts: 695



WWW
« Reply #20 on: July 27, 2015, 09:49:39 pm »

We also took a shot on a Chinese 14" blade at Quartzsite a couple of years ago. It worked so well we bought another on our next trip there. Can't say who made it offhand, but it was a good deal.
Report Spam   Logged



Pages: 1 2 [All]   Go Up
  Print  
 
Jump to:  

Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum | Buy traffic for your forum/website

Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy