123ArticleOnline Logo
Welcome to 123ArticleOnline.com!
ALL >> Business >> View Article

Masonry Drill Bits

Profile Picture
By Author: The PorcelainPlus Speedbit was specifically design
Total Articles: 41
Comment this article
Facebook ShareTwitter ShareGoogle+ ShareTwitter Share

Number drill bit gauge sizes range from size 80 (the smallest) to size 1 (the largest) followed by letter gauge size A (the smallest) to size Z (the largest). Although the ASME B94.11M twist drill standard, for example, lists sizes as small as size 97, sizes smaller than 80 are rarely encountered in practice.

Number and letter sizes are commonly used for twist drill bits rather than other drill forms, as the range encompass the sizes for which twist drill bits are most often used.

The gauge-to-diameter ratio is not defined by a formula, but is instead based on, but is not identical to, the Stubs Steel Wire Gauge, which originated in Britain during the 19th century. The accompanying graph, with each step along the horizontal axis being one gauge size, illustrate the change in diameter with change in gauge, as well as the reduction in step size as the gauge size decreases.

Number and letter gauge drill bits are still in common use in the U.S. and to a lesser extent the UK, where they have largely been superseded by metric sizes. Other countries that formerly used the number series have for the most part also ...
... abandoned these in favour of metric sizes.

Screw-machine-length drill
The shortest standard-length drills (that is, lowest length-to-diameter ratio) are screw-machine-length drills (sometimes abbreviated S/M). They get their name from their most common application: use in screw machines. Given the industrial nature of most demand for screw-machine-length drills, they are generally sold only by metalworking supply businesses (not in hardware stores or home centers).

Jobber-length drill
Jobber-length drills are the most commonly found type of drill. The length of the flutes is between 9 and 14 times the diameter of the drill, depending on the drill size. So a 1/2 in (12.7 mm) diameter drill will be able to drill a hole 4 1/2 in (114.3 mm) deep, since it is 9 times the diameter in length. A 1/8 in (3.2 mm) diameter drill can drill a hole 1 5/8 in (41.3 mm) deep, since it is 13 times the diameter in flute length.

Aircraft-length drill[edit]
Extended-reach or long-series drills are commonly called aircraft-length from their original use in manufacturing riveted aluminum aircraft. For bits thicker than a minimum size such as 1/8 inch, they are available in fixed lengths such as 6, 8, 12, or 18 inches rather than the progressive lengths of jobber drills.

Total Views: 189Word Count: 393See All articles From Author

Add Comment

Business Articles

1. Catering Services In Noida For Every Occasion
Author: Catering Services in Noida

2. Leading The Way In Business Continuity Management System (bcms) In Uae And Dubai
Author: kohan

3. Manila Rope: A Versatile Solution For Various Industries In The Uae
Author: yasirsheikh1891

4. Exploring Asian Clothes Online: A Guide For Uk Shoppers
Author: Dazzle and Bloom

5. Maximizing Your Email Marketing Roi: A Comprehensive Guide
Author: tim seifert

6. Spray Paint: The Ultimate Solution For Versatile And Efficient Painting
Author: yakubali7842

7. High-quality Thrust Needle Roller Bearings: Essential For Reliable Performance
Author: psbearings

8. Web Design Company In Coimbatore
Author: cp

9. Top Needle Roller Bearing Manufacturer: Quality You Can Rely On
Author: psbearings

10. Discover The Best Rfid Tags For Your Industry Needs At Id Tech Solutions
Author: Shivam Kumar

11. Translation Company In India
Author: Lingosolution

12. Why Perlau Gwyn Dental Care Is The Top Choice For Dentists In Cardiff And Teeth Whitening Services
Author: Rebecca Brown

13. Hybrid Inverters & Their Diverse Applications
Author: blogswalaindia

14. The Role Of Solar Panels In Sustainable Living
Author: blogswalaindia

15. Solar Energy And Battery Storage: What You Need To Know
Author: blogswalaindia

Login To Account
Login Email:
Password:
Forgot Password?
New User?
Sign Up Newsletter
Email Address: