Hitachi 729404 5/8-Inch Diamond Grit Drill Bit

Hitachi 729404 5/8-Inch Diamond Grit Drill Bit
by Hitachi

List Price: ~~$26.72~~
Our Price: $16.94
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Category: Tools
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Product Details

Manufacturer: Hitachi
Model: 729404
Product features:

The 5/8-Inch diamond grit drill bit will drill through glass, marble, class 5 porcelain, granite and slate
Outperforms the standard carbide glas and tile bits on the market today, both in speed of drilling and the number of holes that can be drilled per bit
These bits feature raised lips with diamond grit particles that are uniquely sintered in place allowing the diamonds to adhere to the bit
The Hitachi diamond grit drill bit bodies are constructed of hardened and tempered thin wall alloy steel
Comes with a 30-day limited warranty

Description of Hitachi 729404 5/8-Inch Diamond Grit Drill Bit

The Hitachi 729404 5/8-Inch Diamond Grit Drill Bit will drill through glass, marble, class 5 porcelain, granite and slate. They significantly outperform the standard carbide glass and tile bits on the market today, both in speed of drilling and the number of holes that can be drilled per bit. These bits feature raised lips with diamond grit particles that are uniquely sintered in place. The process allows the diamonds to adhere to the bit and not grind down as quickly as other sintering processes. The Hitachi diamond grit drill bit bodies are constructed of hardened and tempered thin wall alloy steel. They require water lubrication during use This can be simply applied with a spray bottle producing a small puddle of water that is spiral fed down the reverse flute threads on the bit to continuously supply water to the cutting edge, cooling the bit tip, and extending its life. This bit is ideal for contractors, serious do-it-yourselfers, machine shops, and mechanics. Hitachi offers the best durability and speed for general purpose drilling applications and has a complete line of professional bits for wood, metal, plastic and light masonry drilling. The Hitachi 729404 5/8-Inch Diamond Grit Drill Bit is warranted to the original purchaser to be free from defect in materials and workmanship for a period of 30-days from the original purchase date. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.

Tools and Hardware Reviews of Hitachi 729404 5/8-Inch Diamond Grit Drill Bit

Customer Review: Good drill, inaccurate size description
Summary: 2 Stars

The Hitachi diamond drill is easy to use and is effective; I used it easily on porcelain tiles. The problem is: I bought a "5/8, 15 mm" drill. The "15 mm" was in fine print. This is a 15 mm drill bit, NOT a 5/8" drill bit. My calipers say that it will only make a 0.588" hole, which would be about right for 15 mm (15mm equals 0.594"). The difference compared to a true 5/8" drill bit of slightly more than 1/32" is significant - porcelain is a very unforgiving material. My experience proved my calipers to be correct, and that this is a 15 mm. drill bit "rounded" to 5/8". After using the "5/8" drill" to bore through the tile, I could not use my 5/8" concrete drill bits to finish the hole in the concrete block wall behind the tile without chipping and breaking the tile. In addition, nothing with a diameter of 5/8" would come close to going through the hole. The completion of the project required a lot of "freehand" enlarging of the hole, with very mixed success. All in all, a disappointing outcome for an otherwise good product.

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