I needed the CORRECT drill bit to allow me to re-tap the holes for some 5/16"-24 bolts. I had the appropriate tap, but I could not find the necessary drill locally. Delivery was a bit longer than 2 day Prime, but was not an issue.
The drill cut through the automotive steel/damaged bolt hole just fine; (7 holes in total; so I really can't measure durability). I now have the drill bit stored with the tap for future use.
From past experience I found it wise to use the CORRECT drill when tapping/re-tapping threads. YMMV.
Century 字母仪表钻头 Size-Q 11617
- Precision ground 118-Degree points
- Designed to operate in stationary or portable tools
- General purpose drilling in wood metal and plastic
|5 星 (0%)||0%|
|4 星 (0%)||0%|
|3 星 (0%)||0%|
|2 星 (0%)||0%|
|1 星 (0%)||0%|
美国亚马逊： 73 条评论
Exactly correct2018年5月2日 - 已在美国亚马逊上发表
Perfect for what it is.. a tap drill for 5/16 x 36 thread headed for Modified Case
L. M. thompson
Not for hard metals2019年1月23日 - 已在美国亚马逊上发表
It says on web site for metal and wood and all applications this is not true it is for soft metals and plastics and for wood not harder metals if I had known for soft metals I would look for a different fit or if I needed to drill aluminum or wood this would be ok. Should describe it as stated on the package
great quality. i've been drilling through steel2017年8月3日 - 已在美国亚马逊上发表
great quality. i've been drilling through steel, apx 70+ plus holes, and i haven't burned through one bit yet. keeping in mind. im drilling at a very low speed to not heat the bit. I use Tap Magic Pro Cutting Fluid. just one drop. best!!