Carbide tipped cutting tool for tip replacement or REPLACEABLE STEEL BLADE??

[Duane Remick]

I watch several tips being installed on youtube / facebook...
seems a majority use a tool that has a very small replaceable cutting tip , i\are these tips sharper than my carbide bit I use???
I sharpen my bit on a gren wheel and seems to do good, but i wnt the best results.

 

[boogieman]

I watch several tips being installed on youtube / facebook...
seems a majority use a tool that has a very small replaceable cutting tip , i\are these tips sharper than my carbide bit I use???
I sharpen my bit on a gren wheel and seems to do good, but i wnt the best results.

Can you post a video that has the cutter you're talking about?

 

[Ģüśţāṿ]

In my opinion, there really is no "best" for tips. The majority of the YouTube videos that do tip replacements, use small portable or homemade drill powered lathes without a tool post, so a blade is the only option.

However, high speed steel can easily be sharpened to cut very efficiently and won't push the tip away like carbide generally will do. So HSS is a better option in this regard.

For me, I will use carbide with a very small radius point or HSS to shape the sides of the tip and a blade to shape the top.

 

[Kim Bye]

Carbide grades, angles and geometry is whole field in itself. So asking if carbide is sharper than a utility blade really depends on the insert type and geometry. I use a SCLCR 1212 turning tool with CCGT 060202 inserts, these have the smallest radius tip, so it's the sharpest inserts, they are meant for finishing aluminum, plastics etc. I use these to turn the tip down to within a few thou of the ferrule and I do the very last pass with a fresh utility blade. Results are pretty perfect, but it does require your workpiece to be very concentric. I work well within 0.01mm. I have found that the easiest way to consistently achieve that is to use a ER40 set-tru collet chuck.

 

[Kim Bye]