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Bosch Bulldog 1 x 10" SDS-Plus Alloy Steel Masonry Drill Bit $5.40 at Lowe's + Free Curbside Pickup

$5.40
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Lowe's has Bosch Bulldog SDS-Plus Alloy Steel Masonry Drill Bits on sale. Select Free Ship to store. Shipping is Free on orders of $45+
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#2
Item 744264 also available. 5/8 dia 18 long.

Bulldog 18-in Alloy Steel Masonry Drill Bit for SDS-Plus Drill https://www.lowes.com/pd/Bosch-Bu...l/50429534
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#3
OOS on everything except the 1"
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#4
Can masonry drills be sharpened?

After 7 holes, 4 inch deep, my 3/8 x 18 stopped cutting.
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#5
Quote from NukinFuts
:
Can masonry drills be sharpened?

After 7 holes, 4 inch deep, my 3/8 x 18 stopped cutting.
Although not an answer to your question, you should be using water to keep it cool.

7 4" holes can be the extent of a bit, though. I may be wrong on that but I haven't found mine to last that long.
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#6
OOS in all sizes now.
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#7
Quote from NukinFuts
:
Can masonry drills be sharpened?

After 7 holes, 4 inch deep, my 3/8 x 18 stopped cutting.
Sure, as long as you did not lose the carbide cutting tip.... There is probably a valid reason why these are closeout.
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Quote from shigro420
:
Although not an answer to your question, you should be using water to keep it cool.

7 4" holes can be the extent of a bit, though. I may be wrong on that but I haven't found mine to last that long.
7 x 4" holes would kill a masonry bit?

Hmmm.

Well.

I was thinking about complaining at Lowe's.

But ...... I remember the fallen Giants of Retail Past .... Builder's Square, Scotty's, 48 Lumbar, True Value, etc...

So, I'll eat the 3$ loss.

Yes, keeping the bit wet helps 👍

Maybe there's some tool out there that would pump-out water through a hose .... at a slower rate than a "fountain pump".

I'm drilling laterally/horizontally ...... if it were vertically, using water would be easy.

I'd need a continuous feed of water for drilling laterally/horizontally Frown
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Last edited by NukinFuts November 21, 2020 at 09:17 PM.

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Quote from ToolDeals
:
Sure, as long as you did not lose the carbide cutting tip.... There is probably a valid reason why these are closeout.
Hmmm, interesting, thanks, ToolDeals.

By looking at the tip, can I distinguish between Good and Bad?

.... in as much as, "if that carbide is still there."
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#10
Those the OP found might be gone, for now, but here's a .5 x 18 bit that's 50% off:

https://www.lowes.com/pd/Bosch-Bu...l/50429538
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#11
Quote from NukinFuts
:
Hmmm, interesting, thanks, ToolDeals.

By looking at the tip, can I distinguish between Good and Bad?

.... in as much as, "if that carbide is still there."
Here you go.... in the attached image, the carbide is the piece that fits into the slotted shaft and brazed on....
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#12
Quote from NukinFuts
:
7 x 4" holes would kill a masonry bit?

Hmmm.

Well.

I was thinking about complaining at Lowe's.

But ...... I remember the fallen Giants of Retail Past .... Builder's Square, Scotty's, 48 Lumbar, True Value, etc...

So, I'll eat the 3$ loss.

Yes, keeping the bit wet helps 👍

Maybe there's some tool out there that would pump-out water through a hose .... at a slower rate than a "fountain pump".

I'm drilling laterally/horizontally ...... if it were vertically, using water would be easy.

I'd need a continuous feed of water for drilling laterally/horizontally https://static.slickdealscdn.com/ima...lies/frown.gif
I have never used water with these... it will just cause the drilled material to become caked mud instead of climbing the spiral out of the hole. In hammer drill mode, you drill for 30 seconds or so, pull the bit out a little and then do it all over.

But.... if you are not using a hammer drill, you will smoke these bits and most all masonry bits in a short time. And of course, rebar in the concrete will smoke these as well.

We do use coolant with core drills that look like a piece of pipe with carbide or diamond bits around one end and thus, drill a core. We also use diamond coolant or sometimes oil for drilling straight holes, or core holes in tile and glass.... but not with a hammer drill.
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Last edited by ToolDeals November 21, 2020 at 09:48 PM.
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#13
Quote from ToolDeals
:
Here you go.... in the attached image, the carbide is the piece that fits into the slotted shaft and brazed on....
Ah, cool ... images don't always show up on mobile SD .... I'll take a look when on a desktop.

Thanks for getting this to me 👍
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Quote from ToolDeals
:
I have never used water with these... it will just cause the drilled material to become caked mud instead of climbing the spiral out of the hole. In hammer drill mode, you drill for 30 seconds or so, pull the bit out a little and then do it all over.

But.... if you are not using a hammer drill, you will smoke these bits and most all masonry bits in a short time. And of course, rebar in the concrete will smoke these as well.

We do use coolant with core drills that look like a piece of pipe with carbide or diamond bits around one end and thus, drill a core. We also use diamond coolant or sometimes oil for drilling straight holes, or core holes in tile and glass.... but not with a hammer drill.
Interesting ..... but I think that having a decent, albeit slow, follow [of any liquid] would help ..... unless the dry slag helps to cut into the substrate??

And as for the hammer mode, yes, you got it correct:

I drilled with hammer OFF (although it's a DeWalt hammer drill).

Sad that I ruined this bit Frown

I never would've thought hammer OFF would kill the bit.
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#15
Quote from NukinFuts
:
Interesting ..... but I think that having a decent, albeit slow, follow [of any liquid] would help ..... unless the dry slag helps to cut into the substrate??

And as for the hammer mode, yes, you got it correct:

I drilled with hammer OFF (although it's a DeWalt hammer drill).

Sad that I ruined this bit https://static.slickdealscdn.com/ima...lies/frown.gif

I never would've thought hammer OFF would kill the bit.
I am surprised that it even drilled 4 holes in straight drill mode... but yes, they will get extremely hot without the percussion and there is where your water might help.... Smilie Water was not going to help it drill, but might have kept it cool... but probably not. In hammer drill mode, you drill for a short time, then take the pressure off by pulling back just a bit and notice the puff of mortar dust that comes out. That helps a lot with allowing the bit to contact solid concrete without dust or worse, wet paste under the carbide bit.

It is not like drilling a well through rock, where there is a water injection tube that brings the slag up and out of the hole while drilling.

Until the 1960's or so, you had to drill holes in concrete with a star bit... a 4 ponged bit that you smacked with a hammer while turning it a quarter turn each time. Some of the first so called hammer drills took two guys to get off the truck and they used water. My Dad still has some of those old star bits and they work, but you earned it.
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Last edited by ToolDeals November 22, 2020 at 02:01 PM.
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