Hope this is the right place for this basic question I did a search using the title and nothing came up. I have 3, 10mm lead screws that came with anti-backlash nuts. None of the nuts will fit anything but the screw they came with though all are 2mm pitch. Helix angles are obviously different. So how do you read the part designation # so I can order more nuts and know they will fit?? There must be a chart somewhere. Any info appreciated.
Hi CA, there is Diameter, Pitch and Lead, the dia is 10mm in your case, 2mm pitch this is the per thread or per start pitch, and you can have multiple starts. So a one start is 2mm pitch 2mm lead, 2 start is 2mm pitch 4mm lead, and 3 start is 2mm pitch 6mm lead.. and so on, lead is how far a nut would travel with one full turn. A link to the ones you have would help us get you the correct nut. Besides this there are different standards and thread profiles so "acme" (a loose term for trapezoidal screw type) is a bit complex. Gary
10mm dia., 2mm pitch, 2 start and 4mm lead. I'm still a little confused, have seen 2 different designations. T10 and Tr10 can't find any info about the difference.
Do you have a link to them? That would be helpful. So many different sellers of these make it hard for us to help without knowing a bit more.
https://www.amazon.com/Trapezoidal-...ywords=Tr10+lead+screw&qid=1595873659&sr=8-17 I have a feeling the Tr means a reverse thread.
T and Tr just mean trapezoidal (vs. ACME). That example IS actually a reverse thread, but that's because it says "single start *left*". The "left" is the key, "standard" "righty-tighty" threads are right-hand threads. For example, here's a "TR10" tap... But it's right-hand: https://www.amazon.com/TR10-Metric-Right-hand-Thread/dp/B07CGNDC3L Left-hand trapezoidal threads are often used on manual machines because it reverses the saddle's direction, so it feels more intuitive when using handwheels. Turning the wheel "right", or clockwise, loosens the thread, pushing the saddle away from the operator, or "forward". "Left" brings it "backward".
