开云体育

As Chuck pointed out, 75% is the common depth goal. The detailed thread specs call for a slight flat at both the crests of male threads & the valleys of female threads - aiming for 75% automatically

I cannot lay hands on my copy right now, as it has vanished into a pile of boxes :-( but Machinery’s Handbook recommends that same for thread depth, and has a larger table for a variety of materials

Evan, I have been using tap drill charts for most all my tapping needs for my entire career. This info is always available to me on large wall charts and has served me well. In special cases I have

Thanks Chuck. Yes ease of tapping is another factor. Hard materials may not form so well, but they are also harder to tap so a lower percentage thread depth would help, and since these materials are

Well, I don’t know if I’m a “real” engineer (mechanical anyway, maybe electrical), but I have done quite a bit of machining. The thread depth is a tradeoff between strength and how difficult

RideTheGearTrain.com Drill Sizes: The latest addition to the menu has an orange border around the button as it is independent of the main program. If you click it you can choose a thread from the

Thanks Bruce. Here I kinda thought I had a novel idea LOL!??I was staring at my lathe the other night, wondering how to gain some travel in both directions.??I don't have, nor do I have access to

Flat bottoms can be done by finding a HSS twist drill of the correct size and carefully grinding the end flat, -- Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD

There are a number of sites and youtube videos discussing this very common mod: https://www.madmodder.net/index.php?topic=962.0 <https://www.madmodder.net/index.php?topic=962.0>

Thanks Dick. I appreciate the help! Ryan

Ryan, The center to center distance is .590” for the nut mounting holes. Dick

Wow!??That's awesome Dick!??I'm sure mine won't turn out near so fancy but I hope it'll be functional!??You wouldn't happen to know the center to center distance on the two screws that mount the

Thanks Dick. I'll take a look! Ryan

Ryan, I did a similar cross slide extension about 3-4 years ago on my MicroMark 7x16 minilathe. There are pictures in the photos section of this group. Look in “old_toolmakers album cross slide

I have added two ball bearings to the cross slide screw by boring a hole into the retainer for the bearings and head on the screw to recess into. Doing that cost me about 1/4" of travel towards

This looks like a SCAM. Unless you have actual knowledge to the contrary, please let this topic die. John 7x12 Mod

Oh and lastly... if it sounds too good to be true, it's because it isn't true. Michael - California, USA Micro-Mark MicroLux 7x16 LMS 3990 Hi-Torque Mill with power feed

My first thought is that it is a scam! They show a Costco website but the URL is from makenye.com Scam-detector shows this: < https://www.scam-detector.com/validator/makenye-com-review/ > Another way

I TEST THE SHIPPING FOR VERMOND FREE ?????? NOT POSSIBLE FOR QUEBEC CITY CANADA QUBEC PROVINCE ??????? SNIF SNIF JACK 47 71 Dug a bit deeper and although the site claims to be Cotsco wholesale, it

Sadly it is 98.5% likely to be a scam! Too bad, I first thought it to be a cleaned up 7X12 with a misprinted price. Even at $970 with reasonable shipping it could have been a fair deal. Keep your