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What is a breakage Tap removal drill? Size selection and processing conditions
Breakage Tap As a drill for removal, there is an EX-H-DRL (commonly known as a hard drill).
Please use the drill diameter that is suitable for each size and type of Tap .
| Tool No. EDP No. |
diameter DC |
flute length LCF |
overall length OAL |
Shank diameter DCON |
Shank length LS |
tip PL |
point angle SIG |
Adaptive Corruption Tap | |||||
| Hand Tap | Point Tap | Spiral Tap | |||||||||||
| 87700 | 2-6 sets (set of 5) | ||||||||||||
| 87702 | 2 | 10 | 30 | 2 | 19.3 | 0.6 | 118° | M3 | No.4,No5,No.6 | M3 | No.4,No.5 | M3 | No.4,No.5,No.6 |
| 87703 | 3 | 15 | 40 | 3 | 24.1 | 0.9 | M4,M5 | No.8,No.10 | M4 | No.8,No.10 | M4,M5 | No.8,No.10 | |
| 87704 | 4 | 20 | 45 | 4 | 24 | 1.2 | M6 | 1/4,5/16 | M5,M6 | 1/4 | M6 | 1/4,5/16 | |
| 87705 | 5 | 25 | 50 | 5 | 23.9 | 1.5 | M8,M10 | 3/8 | - | 5/16 | M8,M10 | 3/8 | |
| 87706 | 6 | 30 | 60 | 6 | 28.8 | 1.8 | M12 | 7/16,1/2 | M8 | 3/8 | M12 | 7/16,1/2 | |
| 87707 | 7 | 35 | 80 | 8 | 43.6 | 2.1 | M14 | 9/16 | M10 | 7/16 | M14 | 9/16 | |
| 87708 | 8 | 40 | 38.7 | 2.4 | M16 | 5/8 | M12 | 1/2 | M16 | 5/8 | |||
| 87709 | 9 | 45 | 100 | 10 | 53.6 | 2.7 | M18 | 3/4 | M14 | 9/16 | M18 | 3/4 | |
| 87710 | 10 | 50 | 48.3 | 3 | M20 | - | M16 | 5/8 | M20 | - | |||
| 87781 | 11 | 55 | 110 | 12 | 53.5 | 3.3 | M22 | 7/8 | M18 | - | M22 | 7/8 | |
| 87782 | 12 | 60 | 48.4 | 3.6 | M24 | 1 | M20 | 3/4 | M24 | 1 | |||
- The selection of the drill diameter depends on the following formula. (D= Tap of size , d=diameter of drill)
Hand Tap , Spiral Tap 0.46D<d<0.75D, Point Tap 0.6D<d<0.75D - A set of 5 pieces (Tool No. 87700) is available, which is a set of φ2, 3, 4, 5, and 6 one each.
When removing the spiral Tap of M4, the corresponding dimensions, processing conditions, and coolant of EX-H-DRL are as follows.
Cutting speed: 20~25m/min
Feed amount per rotation: 0.01~0.05mm/min Please try it while processing little by little by hand feeding as a guide.
In the case of M4, the tool diameter Φ3
The rotation speed is 2000~2500rpm.
Coolant is required.
References: Breakage Tap Removal Drill
・ How to use a tool for removing breakage Tap (EX-H-DRL)