Cutting metric threads

[Steamer1915Participant @steamer1915]

Ady1, Norton says No! to your program

[rebekah andersonParticipant @rebekahanderson95322]

So did the ipad.

[Ady1Participant @ady1]

It'll only run in windows and being uncertificated software, which costs big bucks, will be rejected by stuff like Norton

Does most of the bits people would need though

Input all your changewheels at the same time

Define max allowable error, if there's not a 100% TPI match

Closest match from the wheels you DO have and the order to load them on the banjo for compound gearing

I wrote it a while back out of curiosity after someone asked for a 0.9mm thread setup (28.2222 TPI)

Edited By Ady1 on 31/05/2013 01:35:19

[John Stevenson 1Participant @johnstevenson1]

Very nice one here from Duncan Munro for the Myford but can be applied to any lathe.

**LINK**

[Ady1Participant @ady1]

That's a very fancy one. Looks miles better than mine

[Anonymous]

Posted by Ady1 on 31/05/2013 01:27:59:

I wrote it a while back out of curiosity after someone asked for a 0.9mm thread setup

That's a rare one, otherwise known as 1BA.

Andrew

[Peter TuckerParticipant @petertucker86088]

Hi Rebekah,

One thing you may want to consider is the thread form to use. As this thread is for hydraulics dose it need to be fluid tight? A fully formed Whitworth thread is designed to be made fluid tight, the standard metric thread is not.

Best of luck in your endeavors.

Peter.

[rebekah andersonParticipant @rebekahanderson95322]

Well there is enough space for 127T gear.

That,s all solved

[JasonBModerator @jasonb]

Can you also get the 20T driver in as well and what is the gap if there is one as you will find it tight on the idler.

[Harold PearsonParticipant @haroldpearson13346]

Dear Rebekah,

You could (and this will make the purists squirm). Select the closest imperial thread pitch to the mm one and partialy screw cut your threads. Finish with the metric tap and die. The advantage is that by screwcutting the thread will be central and true to the axis.

harold

[Author]

Posts