Where to find bottom tap for installing Grov Tec flush cups?

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rugbydave

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I'm looking for a bottom tap(9/16"-18UNF-2B) to thread the holes I drill to install some Grov-Tec flush cups in my Boyd's Pro Varmint stock. Anybody know where I can source one (and preferably individually instead of a whole set)? Thanks!
 
Yeah, there's nothing local other than a Rona. I can find it on the Acklands website but it says you have to pick it up locally and I'm not really interested in driving to Vancouver for a tap. Was wondering if there was anywhere online that ships in Canada? My google-fu is weak, apparently...
 
For a one or two off job, just grind the lead off a regular tap if you have one already. In industry, that's what we usually do rather than having to wait for one. If you have to order a tap anyway, then by all means get the proper tap
 
dogzilla said:
For a one or two off job, just grind the lead off a regular tap if you have one already. In industry, that's what we usually do rather than having to wait for one. If you have to order a tap anyway, then by all means get the proper tap
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Yep. For a low usage, probably non-repeat job, buy any tap you can get and grind it back carefully until you get a bottoming type out of it.

There IS actually a lot to be said for watching the CTire sales and setting yourself up with a tap and die set for around home, but fercryingoutloud, don't pay full retail. If you actually find that you are using particular sizes enough to wear out the cheap ones, buy a set of three in that size from a name brand outfit (Taper, Plug,Bottoming) by mail order.

The CTire top end (ish) set sells for about the price of a couple sizes of quality taps, and is worth a bunch when you just need to clean up or clean out a hole.

Of course, almost none of the CTire taps will be of any use for scope mounts, those are generally a bunch of UNEF or UNS thread pitches.

Cheers
Trev
 
Beater said:
I find CT taps aren't worth the time poor quality one time use, if you are lucky, not worth the pig iron they are made out of
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And I find, that for the price, having that many taps on hand is a tough thing to say no to.

They are adequate. When I need to clean the mung out of a bunch of threaded holes, or otherwise do minor jobs about the place, they serve.

If I had to make a living with them, I would choose another route, as like as not, but spending thousands of dollars for a tap and die set isn't in my cards anywhere.

Cheers
Trev
 
Almost any auto parts store NAPA/Ackland's/Lordco/ Etc. can get you a tap Just make sure it is a name brand. Or if there is a tool truck that serves your area they can get you one no problem. Tool truck will be more money probably. Amazon.ca is an other but look for name brands.
 
Mask the area with good masking tape, drill the hole through the tape slightly undersize, add JB and thread the cup in.

That will hold far better than trying to cut threads in laminated wood.
 
Oh jesus, I thought you were tapping metal!

For tapping wood, slash a few relief cuts into the correct diameter bolt. Thread it in and out a couple times, and it'll be as good as you can get for laminate wood threading. I kinda like rgv's suggestion to just goober the cups in with JB or Acraglass or such, too. End result, a permanent install.

Cheers
Trev
 
Just in case anyone was wondering, I finally installed the flush cups last night. Drilled the holes with a 1/2" bit and then tapped them with a 9/16"x18 tap. Dry fitted them a few times, figured out where I wanted them clocked (they're limited rotations flush cups), gobbed in some JB Weld and screwed them back in. So far, so good. I was kinda surprised at how well they held just dry-fitted into tapped laminated wood.
 
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