Question on tap size
- Thread starter GRadem
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Texatdurango
Member
Different brands use different threads, what brand nibs did you buy?
As far as the proper drill, the easiest way to remember the correct drill size is to subtract the thread pitch from the diameter of the tap. In this case it's 6.5mm-.6mm = 5.9mm. You would use a 5.9mm drill.
The best way to find out quickly is to drill a 5.9mm hole and tap it, then see if the feed housing screws in.
Texatdurango
Member
Last edited:
yort81
Member
[/quote]YEP!
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?
YEP!
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?[/quote]
In the library under general reference http://content.penturners.org/library/general_reference/conversions.pdf (I keep a copy of this one on my desk top)
There is also a drill chart
Checking the chart a letter A or 15/64 may be a better fit if the tap goes in tight. Try different ones and see what you like. I use a C drill bit for the 6.5 X.5 with no problems although a B may be better. The plastic feeds are injection molded for production and are not always as round as you think. Some Even have mold fins left in the threads if you look close enough. Different bits may be needed for different materials. Softer materials that tend to stretch may need a bigger bit.
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?
[/quote]In the library under general reference http://content.penturners.org/library/general_reference/conversions.pdf (I keep a copy of this one on my desk top)
There is also a drill chart
Checking the chart a letter A or 15/64 may be a better fit if the tap goes in tight. Try different ones and see what you like. I use a C drill bit for the 6.5 X.5 with no problems although a B may be better. The plastic feeds are injection molded for production and are not always as round as you think. Some Even have mold fins left in the threads if you look close enough. Different bits may be needed for different materials. Softer materials that tend to stretch may need a bigger bit.
Last edited:
Texatdurango
Member
YEP!
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?[/quote]
PM sent
I just looked at my cheat sheet and saw that I use a Number #1 drill bit.[/quote]
Where does one get the cheat sheet?
[/quote]PM sent