Tungsten Carbide rotary Burrs

[Disco_owner]

okay , I refuse to pay 70-80 bucks for "one" Tungstan carbide rotary burr at local engineering store.:mad:

Does anyone know where I can source reasonable quality rotary burrs from locally at a reasonable pri$e,bearing in mind they won't be used all that often but I want something that won't let me down.:(

I'm not familiar with quality of the Tunsgten carbide burrs from china or hongkong ? has anyone had any exsperience with them that would like to share from own experience.

thanks in advance

[Disco_owner]

Just talking to a friend , he recommended this mob:


Toolfix;

(02) 9874 5000

29 Hope St, Ermington NSW 2115, Australia

They might have what I'm looking for at a reasonable price.

[robzilla]

i've bought my die grinder bits from Total Tools, about $40 each.
plenty of life out of them

[LandyAndy]

Brian Heljm dabbles it that sort of gear,send him a PM.
Andrew

[Disco_owner]

I ordered a set 5 x burs 1/4"inch shank from THK in hongkong. $57.00 delivered.will see how long they last.

[Bigbjorn]

I can do a set of 10 x 1/4" shank for A$120 allowing US$20 for air-mail and 0.85 exchange rate. Or 12 x 1/8" shank for A$90. I don't stock them. Delivery 3-4 weeks.

[Bigbjorn]

I can provide the cutting head lengths and diameters not in the kits also. There are ten shapes and a multitude of cutting head sizes. The kits are the usual double cut for ferrous metals. Single cut aluminium use burrs are available also. Aluminium and other metals with similar chipping characteristics clog double cut burrs as do some plastics. Aluminium cut by quote.

[Disco_owner]

The set I ordered from THK are obviously made in Mainland china , be intereseting to see how they stack against the quality of Tungsten carbide Burrs coming out of US .

[Bigbjorn]

The set I ordered from THK are obviously made in Mainland china , be intereseting to see how they stack against the quality of Tungsten carbide Burrs coming out of US .

Ther ones I quoted are "Star USA" which brand is usually for US made tools packaged under their house brand. Star Tool Supply has another house brand "Meda" which are imports from anywhere in the world.

I will e-mail and ask where their TC burrs are made.

[Tank]

The set I ordered from THK are obviously made in Mainland china , be intereseting to see how they stack against the quality of Tungsten carbide Burrs coming out of US .
Khos, will be interesting to see how the Chinese burrs stack up, I have a Tungsten Carbide burr I bought 30 odd years ago, have done a great deal of work with it, the shank is a bit rough but it is still sharp and well and truly serviceable, I paid around $40 when average wage was around $100/week, BTW what are you deburring, Regards Frank.

[Dinty]

G'day All, You only get what you pay for just like frank said cheers dennis

[ramblingboy42]

I have had tungsten burrs so hot that theyve melted the solder joint, just silver soldered it back on and away it went......but not so hard. go slow if youre using it on aluminium as it will melt the ally and clog the cutting edges hard. they really work best in a sturdy electric drill (you know, the ones you plug the lead into a power socket)as they have better bearings and dont chatter as much. once you get a set youll use them so much youll wonder why you didnt get them earlier.

[Bigbjorn]

I have had tungsten burrs so hot that theyve melted the solder joint, just silver soldered it back on and away it went......but not so hard. go slow if youre using it on aluminium as it will melt the ally and clog the cutting edges hard. they really work best in a sturdy electric drill (you know, the ones you plug the lead into a power socket)as they have better bearings and dont chatter as much. once you get a set youll use them so much youll wonder why you didnt get them earlier.

A drill won't run tungsten carbide fast enough to cut efficiently. You need a die grinder that runs 10,000 rpm or more. A 1/4" diameter TC burr in steel should be running at least 10,000 rpm. I have four, a long nose 1/4", a short nose 1/4", and two 1/8" pencil grinders. I also have an electric 1/8" flexible shaft grinder. The 1/8" Desoutter with proper air flow runs 40,000 rpm. Aluminium and many plastics will clog double cut burrs. you should buy aluminium cut (single cut) burrs for these materials.

[steveG]

Something that helps stop double-cut burrs from clogging with softer metals is to rub a bit of wax on them (beeswax or candle wax). You have to repeat regularly but it makes a huge difference.

Steve

[Bigbjorn]

Ther ones I quoted are "Star USA" which brand is usually for US made tools packaged under their house brand. Star Tool Supply has another house brand "Meda" which are imports from anywhere in the world.

I will e-mail and ask where their TC burrs are made.

Got a reply. They are made in either California or Michigan and packaged as "Star USA".

Star Tool Supply and Machine Shop Discount Supply are joint venture companies of Michigan Drill and the Bacharach family businesses that moved from The Bronx and Yonkers to the Michigan Drill facility in South Hackensack last year.

[Disco_owner]

they arrived this morning , haven't had a chance to put em thru the proper test yet :twisted: but I used one this morning and holy crap you need volumes & more volumes of air to operate that die grinder with a bit of grunt........continously.:o

[Bigbjorn]

they arrived this morning , haven't had a chance to put em thru the proper test yet :twisted: but I used one this morning and holy crap you need volumes & more volumes of air to operate that die grinder with a bit of grunt........continously.:o

Flow gives speed and pressure gives force.

Die grinders don't need much more than 80 psi, but do need high flow to achieve efficient cutting speed. My 1/4" grinder overruns my 16 cfm compressor giving catch-up time whilst waiting for the tank to refill to inspect your work.

[Disco_owner]

Flow gives speed and pressure gives force.

Die grinders don't need much more than 80 psi, but do need high flow to achieve efficient cutting speed. My 1/4" grinder overruns my 16 cfm compressor giving catch-up time whilst waiting for the tank to refill to inspect your work.

Thanks for clarifying this , I got your PM and have replied. :) look forward to do a comparison test between the 2 x sets. :cool:

[ramblingboy42]

A drill won't run tungsten carbide fast enough to cut efficiently. You need a die grinder that runs 10,000 rpm or more. A 1/4" diameter TC burr in steel should be running at least 10,000 rpm. I have four, a long nose 1/4", a short nose 1/4", and two 1/8" pencil grinders. I also have an electric 1/8" flexible shaft grinder. The 1/8" Desoutter with proper air flow runs 40,000 rpm. Aluminium and many plastics will clog double cut burrs. you should buy aluminium cut (single cut) burrs for these materials.

Brian , I agree, but I use mine at home in an electric drill......I dont have an air compressor and you really need an industrial compressor to run a die grinder. You can use your burrs in a hand drill but I agree with you, they wont work as efficiently as in a die grinder.

[UncleHo]

G'day Folks :)

I have a die grinder tip which I use for small detailed work and use it in a "EL-Cheapo" super works rotary grinder thingy and have had good results, 1/8 shaft tool,and take you time it is an ideal etching/relieving tool, "for fettling"

But as Brian says an air operated Die Grinding tool is far more effient,but they use a lot of air,16cfm doesn't last long;)


cheers

[Pedro_The_Swift]

remember to oil that die grinder;)

[steveG]

Smaller die grinders work well for home use. I've got one similar to this:
Puma Angle Die Grinder. #PAT7034 (http://www.justtools.com.au/prod1907.htm)

No problems running it on my 12CFM compressor.
The one in the link has average consumption of 5CFM.

The 90* head on cheap ones fail with hard use (mines an US Dotco brand and is OK), but the straight ones are pretty robust. You can pick up cheap chinese ones that are great for occasional use for about $30.

IMO if you've already got a compressor its a much better option than running them in a hand drill.

steve

[Bigbjorn]

I have had tungsten burrs so hot that theyve melted the solder joint, just silver soldered it back on and away it went......but not so hard.

This can't happen with the ones I sell. Mine are solid tungsten carbide.