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dvk
08-20-2004, 07:04 PM
Does anyone know what size of metric lead screw is on the cross slide of the 7X10 mini lathe, I know its TPI is 1mm. but don't know the metric size of the lead screw itself because I want to buy a left hand tap to make some lead screw nuts for the lathe, for tooling I'm making for it.
Thanks in advance...


[This message has been edited by dvk (edited 08-20-2004).]

CCWKen
08-20-2004, 07:24 PM
I guess measuring it would be too much work? http://bbs.homeshopmachinist.net//rolleyes.gif

If so, here's a link for you. For $5, it's hardly worth making.

http://www.littlemachineshop.com/products/product_view.php?ProductID=1203

You can buy several of these a lot cheaper than a tap I might add.



[This message has been edited by CCWKen (edited 08-20-2004).]

dvk
08-20-2004, 08:01 PM
When it comes to measuring a metric screw thread is the first number the mm of the diameter of the rod, does it work the same way as a SAE screw where the first number is the diameter and the second is the TPI.

In other words is a metric screw use the same configuration as a standard screw
Thanks.

PaulG
08-20-2004, 09:06 PM
<font face="Verdana, Arial" size="2">Originally posted by dvk:
When it comes to measuring a metric screw thread is the first number the mm of the diameter of the rod, does it work the same way as a SAE screw where the first number is the diameter and the second is the TPI.

In other words is a metric screw use the same configuration as a standard screw
Thanks.</font>

M will precede the diameter (or MJ) and then the thread pitch. But it's not TPI (threads per inch) it's the actual pitch in MM. Example: M10x1.5 Normal metric thread profile, 10mm diameter, 1.5mm thread pitch. If the thread pitch designation is omitted, it specifies coarse pitch threads.

Carl
08-20-2004, 10:22 PM
Pitch is the distance from the crest of one thread to the the crest of the one next to it.