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The standard designation would be 1 1/4" - 12 UNF

If the designer has specified dimensions that differ from the UNF standard, the thread could be considered 1 1/4" - 12 UNS (special).

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According to the formulas found in ISO 2901, the minor diameter should be 8.000 - 8.236 for a 7H fit.

Remember that the machine cost is just the beginning. You'll likely need to spend substantial sums on cutting tools, fixturing, inspection equipment, maintenance and repair, and consumables.

You only specify a Y coordinate one time. You're assuming that the tool is at Y2.5 at the start of each half-circle, but have you verified that? I'd try sticking Y2.5 in each circular move just as...

Maybe program a .001 radius on the corners?

I think eight to twelve an hour is a more realistic range for someone with your planned background. And, usually without benefits for part-timers.

I often used drills below the porting tools when machining hydraulic manifolds. Sometimes the blueprint made other tools necessary.

I'm proud to announce the release of ME ThreadPal 2.5.


* The interface has been redesigned for improved legibility and useability.

* A separate window has been added for...

Definitely drill deeper if possible.

BSF is a fine-pitch Whitworth thread.

Thanks for the info.

The R value is negative for an OD thread?

Look at ME Consultant Standard or ME Consultant Professional
http://closetolerancesoftware.com/

A few possibilities for ideas:

http://www.cuttingtoolengineering.com/pdf/2002/0202-creativeturn.pdf

www.boyar-schultzsmt.com
...

Scorpion,

I have the 27th edition of MH, large-print edition


Page 1795, Table 10

PD tolerance for M6 x 1 (grade 6) = .150
PD tolerance for M32 x 1.5 (grade 6) = .200

Hi scorpion,

These are the supported thread types.

http://closetolerancesoftware.com/Miscellaneous/ThreadTypes.png

Today I released ThreadPal 2.0. It adds some important features and is even easier to use than the previous version.


Features include:

* Detailed Data for Thirty-Nine Thread Types
...

I received the following message back from AVG (they're fast!). The file I sent them for analysis was a copy of the currently-available trial version of ME Consultant Professional. This is the one...

This is a false positive. A few antivirus programs throw up an alert because I use encryption software (EXECryptor) to discourage reverse engineering. This is a common problem when using encryption...

When you use a sharp-pointed tool, the minor diameter will be smaller (external) or the major diameter will be larger (internal) than allowed by the appropriate specification. This might have a...

Now released as freeware.


ME Weights is designed to calculate the weight and volume of an object of a specific shape and size, and composed of a specific material. The shape can be selected...

They're excellent, in my experience (vertical twin-spindle lathe, two horizontal machining centers).

Google the terms "trepanning" or "face grooving".

The major and minor diameters change .0020 for each .0010 of plating buildup, but the pitch diameter changes by .0040 on a 60-degree thread.

You might need to get away from the topping insert and...

These are the values I calculate for .750-20 UNEF-3A (it's not a UNS thread)

major = .7500/.7419
pitch = .7175/.7142
minor = .6959/.6817

Where did you get your numbers?

Aunque soy norteamericano, puedo ofrecerte un poco de ayuda.

http://www.niagaracutter.com/techinfo/common_mat/index.html...

There's an illustration near the bottom of this page.

http://en.wikipedia.org/wiki/Milling_cutter

Based on what I've seen, .125 per side should be okay, much over that will likely start popping inserts now and then.

You can do more with single-sided CNMM's, but only get two cutting edges.

Happy reading.

http://www.precisiontwistdrill.com/techhelp/help_pages/jobber_length_amg.asp
http://www.niagaracutter.com/techinfo/common_mat/index.html...

Charts for many materials here, for end milling.

http://www.niagaracutter.com/techinfo/common_mat/index.html