micromotor

tsterling

Elite Cafe Member
Joined
May 20, 2007
Messages
257
Location
Coupeville, WA, USA
#22
https://www.ottofrei.com/Carbide-Bur-Cone-Rounded-Point-13mm-X-2-2mm

Is this good for the job? Or very rough? Quickly wear out? How many pieces should I buy?
I would avoid the waste of money.
Not good for engraving. Here’s what I use for most background removal (smallest they make): http://www.lascodiamond.com/Merchan...=PROD&Store_Code=LDPI&Product_Code=QUARTER-HP

If I get below 10 on hand, I order more. I also use the #2, #5, and #8 (larger sizes).

Best of luck,

Tom
 
Joined
Dec 29, 2015
Messages
68
Location
Japan
#23
Hi,

Busch/Germany makes in my opinion the best burrs!

Here:
https://www.ottofrei.com/search?keywords=Busch

For silver/gold etc the normal HSS burrs are fine!
About steel, better ask the firearm engravers, I m just a bench Jeweller, working in softer metals!

Before remove metal on a real piece, try carefully out on practice pieces of the same metal!
Try out different speeds, more speed is not the better choice, the right speed is!
Often slower is better! High speed generates heat, the burr doesn't cut anymore it smears the metal, also burrs wear too fast!
Use a lubricant for the burrs/drills, like an oil, beeswax, or "stay sharp"!

-----------------------------------------------
Burrs can hook, U damage the piece or even injure ur self!
Be careful !!!
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It might be also a good idea to check prices at dental tech. tool shops. Sometimes the same products are cheaper there than at Jewellery tool shops!

Greetings
Tako

Stay sharp:
https://www.ottofrei.com/search?keywords=Stay sharp
 
Joined
Dec 19, 2015
Messages
72
Location
Holland
#24
For drilling or burring/grinding in steel or other hardened metals. You need to use carbide burs. And always a slow speed. around 3000RPM is good. A lubricant will help to increase the life of your burs. If they get hot they get dull faster.

2.35mm burs is probably what will fit in your handpiece. But first check. 2.35 is the most common size for jewelers.
Busch has carbide burs. They have a yellow stripe on the shank.
Komet also has carbide burs. https://www.kometdental.de/en/Products.aspx
 

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