I will also work on a slightly more stable setup, it moved to much when I had to push, especially on the Hilti. There is a second part in the making to compare the Festool CE Stone drill bits to Bosch/Hawera carbide tipped masonry/stone drill bits. I think it shows nicely just how different various edge/cutting geometries work. In the end I used a Bosch GBH 2-26 for some "brute force" with a 12mm SDS-plus drill bit. The Hilti TE 2-M is a special rotary hammer because it, kinda like the PDC, has four different gear settings: hammer drilling (full) at 930rpm, drilling 1st gear at 930 rpm, precision hammer drilling also at 930rpm but with much less joule, drilling 2nd gear at 2200rpm. I especially bought a used Hilti TE 2-M for this because I also wanted to show that SDS-plus type drill bits will work better at higher rpm's when used without hammering. Almost no pushing, they're literally sucked into the masonry. It also shows how really, really easy the Festool CE Stone drill bit gets into the material when driven by the Festool PDC 18/4 in 4th gear at 3800rpm. I finally got around to a little video project I had planned for a while.īasically it is meant to show that drilling and percussion drilling are better options than hammer drilling when dealing with masonry (and other hard/baked stone ware). Quote from: six-point socket II on March 12, 2017, 06:53 PM Hi! If someone has more insight on those drill bits and why they are so great - any input would be highly appreciated! I wanted to share this experience - and I really can't recommend these drill bits enough. Also the fact their tips are made from carbide can't be the sole reason - the MultiConstruction and X5L SDS-Plus drill bits from Hawera also have carbide tips. Since I also couldn't get into the walls with just the Hawera MultiConstruction drill bits AND the PDC, I strongly assume theres more to the Festool CE Stone drill bits than just the fact that they are running at a extremely high speed in the PDC. For the two holes I needed the hammering mode, it was a piece of cake too after changing modes. I drilled all but two of them without hammering, just with the PDC on full speed of course. Description Fast and effective drilling in tough materials such as concrete, stone, and block requires the use of the best masonry drill bits. Over the last two days I renovated the kitchen, had a ton of 5, 6 and 8mm holes to drill. I thought I had hit a "soft spot", so I did it again, and again. I originally simply tried because I wanted to see what happens, so I used a 6mm CE Stone drill bit from Festool in my PDC and it went right into the wall. Even the pros that did the hole for the gas line needed a lot of patience with their SDS-Max type rotary hammer and hole cutter. I never ever bought cheap drill bits, but with my rotary hammer and it's drill bits I couldn't (and I can't) get into my walls without hammering (masonry, not concrete). But that's how amazed I am by the Festool CE Stone masonry drill bits when used with my PDC.
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