The pilot holes of the taps of the 467UNF and UNJF threads are different.
The UNJF for aerospace applications has a larger minor diameter (pilot hole).
加工条件・トラブルシュート | オーエスジー
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No : 467
公開日時 : 2019/02/26 18:10
更新日時 : 2022/06/09 11:25
MT6×0.75 screws and grease nipples are external thread standard. (JIS B 1575) external thread is 1/16 taper, but internal thread is a parallel thread and can be processed with a tap with M6×0.75 STD notation.
No : 480
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
The amount of tap oversize required for the plating process is calculated from the plating coating thickness .
When it is considered that the diameter of the part of the screw increases when the thickness of the plating is added, it is the "effective diameter", which is the diameter of the slope (flank) part of the thread.
No : 483
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
Is there a list of tap pilot hole diameters?
You can refer to it from the following link.
No : 486
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
How deep do you need to tap pilot holes?
To calculate the required depth for the tap pilot hole, you need to know the machining depth of the tap you want to use.
The machining depth of the tap is the effective thread depth + the length of the length of the length with bite (incomplete thread length) + the length of the protruding center, but please set it with a margin
No : 487
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
Please refer to the table below for the pilot hole diameter of the insert screw tap.
Cutting taps for insert screws
・A-SFT HL
・EX-HL-SFT
・EX-HL-POT
・HL-HT
Rolling taps for insert screws
・HL-B-NRT
No : 503
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
0.5625-18UNJF is the inch notation of 9/16-18UNJF.
Even with 9/16-18UNF taps, the shape of the internal thread is the same, so if the accuracy is correct, machining is possible.
(The pilot hole diameter of the UNJF must be varied from the size of the UNF.) ）
However, you need to pay attention to the thread accuracy.
Screws with a
No : 504
公開日時 : 2019/02/26 18:10
更新日時 : 2020/10/20 09:41
Once the chamfer is removed, it cannot be cut.
chamfer is the part of the "cutting edge" that is cut by tapping.
If you don't have enough pilot hole depth, consider a short chamfer tap or thread mill.
No : 510
公開日時 : 2019/02/26 18:10
更新日時 : 2021/06/22 18:16
What is Upper Thirds Tap?
At the request of customers such as "tight when external thread is inserted", "plating on internal thread ", "strain countermeasures by heat treatment after internal thread processing", etc.
Larger screws may be required. In that case, you will use a so-called "
No : 511
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29
In forming tap processing, burrs form on the hole entrance , resulting in a raised shape.
In order to suppress the burr of the hole entrance , it is effective to perform a chamfer of 60~70° (full-width) in advance on the pilot hole of the forming tap .
No : 582
公開日時 : 2019/02/26 18:10
更新日時 : 2024/08/28 02:29