Carvetight vs. Rock Chuck

[lynnfrwd]

The CT can take any 1/4" shank bit using a rubber stop collar and sharing a 1/4" split collet EXCEPT for the carbide bits (1/16" Carving Bit & 1/8" Cutting Bit). The carbide bits can and will eventually slip with the split collet. They require a hard pressed adapter that will not slip.

The 1/16" cutting bit (itty bitty one) is a carbide bit, but the outside that makes it a full 1/4" bit is steel. Therefore, it can share the split collet.

[cnsranch]

The 1/8" cutting bit (itty bitty one) is a carbide bit, but the outside that makes it a full 1/4" bit is steel. Therefore, it can share the split collet.

Did you mean 1/16"?

[lynnfrwd]

Yes, itty bitty is 1/16" not 1/8".

Thanks!

[Router-Jim]

The CT can take any 1/4" shank bit using a rubber stop collar and sharing a 1/4" split collet EXCEPT for the carbide bits (1/16" Carving Bit & 1/8" Cutting Bit). The carbide bits can and will eventually slip with the split collet. They require a hard pressed adapter that will not slip.

The 1/16" cutting bit (itty bitty one) is a carbide bit, but the outside that makes it a full 1/4" bit is steel. Therefore, it can share the split collet.

Thanks for the quick reply. Just so I'm clear, if the shaft is carbide, then it needs a pressed adapter....right? If the shaft is steel and the cutters are carbide then I can use a split adapter...right?

[lynnfrwd]

Thanks for the quick reply. Just so I'm clear, if the shaft is carbide, then it needs a pressed adapter....right? If the shaft is steel and the cutters are carbide then I can use a split adapter...right?

Yes and yes!

[Router-Jim]

Great!

Thanks again.

Jim

[Jeff_Birt]

So, you used a known worn collet with a carbide shaft bit to justify the slippage?

I'm not justfying anything. I'm just staing that contray to what other folks want to belive, carbide bits WILL slip when a steel shank will not. I think that is what CW was trying to avoid with their pressed on adapters for the smaller bits (and the runout will be less than a split busing as well.)

[cnsranch]

Enlighten me, Jeff (seriously) is carbide more porous, preventing the collet from gripping it properly??

[Jeff_Birt]

No carbide is much harder and will not compress like steel does. When you chuck in a steel shanked bit, the shank will actually compress slightly; overtighten the chuck and you'll dent the shank. With a solid tool holder (like the QC adapter) the set screw will bite into the steel shank, but not carbide, that is why you need the flat spot.

[cnsranch]

I see said the blind man.....

Hey, you should be an engineer