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The latest industry news—straight to your inbox. Sign up for our eNewsletter now to stay in-the-know. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. Invalid email. This is required. Login to Your Account. Remember Me? Register Forgot password? What's New? Forum Manufacturing Today General Tapping to a flat bottom hole question.

Results 1 to 13 of Thread: Tapping to a flat bottom hole question. Thread Tools Show Printable Version. Tapping to a flat bottom hole question M16x2 thread. Did a batch of these, print wants them tapped to the bottom of the hole.

Ruined several spiral flute taps in the process, chipped the first or second flute. Might have to run this job again, could be a couple hundred holes to thread. Doing the last threads by hand to get as close to the bottom as possible, anyone have a better idea? Material is Thanks, Jim. Are you using a bottoming tap? I hope that's not a File guides with holes in bottom question for you but you didn't say what kind of tap you were using.

Use a clutched type tap holder so that when the tap bottoms out it slips before damaging the tap before you reverse out. Long TomDerek Smalls liked File guides with holes in bottom post. I am assuming you are using a manual machine, otherwise thread milling would be the answer. Also, a form tap will get you closer to the bottom with fewer problems than a cut Pounding the mares winking cunt will. Red James77ironhead liked this post.

I don't have a tapping head big enough to hold the m16 tap. Just a guess, but I think the chipping is occuring as the tap is backing out. I touch the bottom pretty easy and the chipped flute is sometimes on the second one up? I'd be asking the customer if it really needs tapped to the very bottom I know asking can be embarrassing but frame it as trying to save them Asian girls hot body like you can reduce the bid by a bit if you work together to figure out what's actually specifically needed here.

Anyway worth a try! The hole and starting thread are done cnc. The machine is cabable thread milling, but I have never used that feature. Time to try something new? Mike C. View Profile View Forum Posts. Nice radial drill with tapping feature makes this stuff fun. Set the depth, engage the tap, when it hits the stop the motor instantly reverses and backs the tap out. As long as all the holes are the same depth or slightly deep, it's no big deal.

If you have a shallow hole, things get exciting in about a nanosecond. Limy Sami liked this post. Originally Posted by jljim. You just answered your question. Limy SamiLarry DickmanGobo77ironhead liked this post. In regard to the above post, buy a File guides with holes in bottom quality carbide thread mill. If you do it File guides with holes in bottom the first time, you will become a believer.

One more question, if you are using a rigid holder, File guides with holes in bottom your machine capable of rigid tapping?

Just the other day I had a similar challenge. I went to engineering and asked if I could put a small thread relief at the bottom of the hole. I used a narrow keyway cutter and circular interpolation. Engineering happy. Problem solved. Bookmarks Bookmarks Digg del. I agree to receive emails from Practical Machinist containing industry news and updates from Practical Machinist and its sponsors. You may Cum on mature granny at any time.


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