Rated 5 out of 5Â by 10
Rated 5 out of 5Â by _TQC_ Faster holes=less wear
I tested the 1/4" BlueGranite Turbo up against a competitor's 'professional series' 1/4" masonry bit. I used a Hitachi hammer drill, and marked each bit at the 2" depth.
I decided to time the drilling of three holes and use the average..
First CMU (cinder block)
Other Brand- 8.1s
Then Red Brick
Finally Well Cured Concrete
It's clear that the Blue Granite bit was faster, but what was impressive, the tip of the bit was still sharp feeling, while the 'other brand' was starting to get rounded off.
---Tried to add photos, but they wouldn't upload...
May 26, 2014
Rated 5 out of 5Â by overanalyze Good life
I had a shower door to install in hard porcelain. I needed to drill several holes for the wall mounts. I have drilled this tile before and it required a diamond hole saw type bit to get through. I decided to give this bit a try instead.
I started with the 1/4" and drilled two holes. It was very slow going. I kept a water spray bottle close to keep the bit cool. For the next 4 holes I used a Bosch BlueGranite 5/32" bit as a pilot hole and then switched to the 1/4" bit. This worked much faster. I still used water to keep the bit cool. I drilled a total of 6 holes before the 1/4" tip broke. The last holes I drilled with my diamond hole saw, which also gave out.
I think this was an extreme test for these bits and they did excellent. The 5/32" bit is still in good shape to use for tapcons. If they would add these BlueGranite features to their sds bit line, I would definitely add them to my arsenal.
May 26, 2014
Rated 5 out of 5Â by RonW Best I've used
A couple things that I notices after getting the bit. The wings will help hold it in the chuck with no spinning. And the shape of the tip. Really helped start a hole.
I did a small test between three bits . I needed to drill 32 1/4" holes through 3/8 tile and into concrete. To install Tapcon's. This Blue Granite turbo drilled close to 2 times faster then others. And left a cleaner hole. At the end of the day the bit still looks brand new. I will be getting more of these bit.
May 8, 2014
Rated 5 out of 5Â by KurtW Great Bit
I received this 1/4" Blue Granite Turbo bit as a sample to test. I tested it using my Bosch cordless Brushless HDS 182 Compact Tough Hammer Drill/Driver, as that is the only hammer drill I have with a Chuck and not designed for SDS Plus or SDS Max bits. I typically prefer the SDS type bits as I find they typically drill faster than the standard bits I have used. In the construction business, time is money and if your bits slow you down, they are costing you money.
I was pleasantly surprised at the performance of the bit in the cordless hammer drill. I found that the bit was as aggressive as any of the SDS products I have used in the larger drills. I compared the 1/4" bit to some 3/16 bits I had and found that the time it took to drill a hole through the same material was essentially the same even though the bit was removing quite a bit more material.
I noticed that the bit had three nubs on the drill end of the bit. Bosch calls this the Power Grip Shank. Ith shank allowed a solid grip in the chuck of the drill that resulted in no slippage what so ever. This is a great advantage with the keyless chucks that are so prevalent on today's drills. It is a feature that could be used on standard drill bits also.
Over all, I was very pleased with the performance of the bit and would highly recommend the bit for general use whether you are a Diy'er or professional. I found that the bit will perform up to any needs I would have if it and definitely go beyond the expectations of a standard shank masonry bit.
June 9, 2014
Rated 5 out of 5Â by NJBuilder So far so good
It's done everything I've asked it to in the past 2 weeks which have been crazy but plenty of drilling. Still seems as effective and sharp as when I first got it. I'm glad that I've bought it.
May 8, 2014