which 3/8 tap for full flow?

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ridenrace6
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which 3/8 tap for full flow?

Post by ridenrace6 » Mon Oct 10, 2016 12:03 pm

can someone steer me in the right direction as to which one of these taps i need to tap the "normal" full flow location, i believe it's 3/8 but they have several different types listed

https://www.fastenal.com/products/cutti ... 01:^3/8%22$|~


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Marc
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Re: which 3/8 tap for full flow?

Post by Marc » Mon Oct 10, 2016 1:11 pm

Fastenal #55285

https://www.amazon.com/Vermont-American ... 8+pipe+tap

For threading light alloy you don't need to spend big bucks on a machinist-quality tap, just get something better than cheapo Chinese.

Do you have the ¼NPT tap for the oil pump passage? That'd be their #55284 or https://www.amazon.com/Vermont-American ... 3AEWK2K67J
Note that when plugging the pump's outlet you often will need to grind the tap shorter so it'll make threads of sufficient diameter before bottoming out against something...a similar problem may be encountered when tapping the case, if you force a bottomed tap it can crack the case - drill deeper and/or shorten the tap.

ridenrace6
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Joined: Wed Aug 26, 2009 10:00 pm
Location: moulton, al.

Re: which 3/8 tap for full flow?

Post by ridenrace6 » Mon Oct 10, 2016 8:48 pm

Marc wrote:Fastenal #55285

https://www.amazon.com/Vermont-American ... 8+pipe+tap

For threading light alloy you don't need to spend big bucks on a machinist-quality tap, just get something better than cheapo Chinese.

Do you have the ¼NPT tap for the oil pump passage? That'd be their #55284 or https://www.amazon.com/Vermont-American ... 3AEWK2K67J
Note that when plugging the pump's outlet you often will need to grind the tap shorter so it'll make threads of sufficient diameter before bottoming out against something...a similar problem may be encountered when tapping the case, if you force a bottomed tap it can crack the case - drill deeper and/or shorten the tap.
ok thank you very much for the info, i was very confused when they listed 14 choices for a 3/8 pipe tap lol


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sideshow
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Re: which 3/8 tap for full flow?

Post by sideshow » Tue Oct 11, 2016 7:48 am

Also worth looking at; http://www.harborfreight.com/hand-tools ... 69877.html
It doesn't take much tap to make nice threads in your target material. Nor does one feel bad about shorting inexpensive taps.
Yeah some may call it overkill, but you can't have too much overkill.

ridenrace6
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Re: which 3/8 tap for full flow?

Post by ridenrace6 » Tue Oct 11, 2016 7:15 pm

sideshow wrote:Also worth looking at; http://www.harborfreight.com/hand-tools ... 69877.html
It doesn't take much tap to make nice threads in your target material. Nor does one feel bad about shorting inexpensive taps.
ok thanks i have harbor freight and fastenal stores along with a grainger store all in about a 30 minute drive so now i have an idea of what i need


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