When I am looking at ballscrews I see mostly metric ones out there so
please tell me about the numbers.

1. What do the numbers mean?

For example:

C3 6-1mm L145

I am guessing 6 is the diameter, and 1 is the pitch. L145 is probably
the overal length including machining.

What is the C3 or C7 at the begining? Grade? Hardness? Precision of
grind?



2. Can you clamp them up in a lathe to redo or cut your own maching
on the end? Will that bugger up the grooves? How hard can you clamp
them up? Is that going to vary from screw to screw?

"Bob La Londe" wrote in message
...
When I am looking at ballscrews I see mostly metric ones out there so
please tell me about the numbers.

1. What do the numbers mean?

For example:

C3 6-1mm L145

I am guessing 6 is the diameter, and 1 is the pitch. L145 is probably
the overal length including machining.



More likely it's 6mm pitch and single start.

And 145mm would be a bit under 6in length.


What is the C3 or C7 at the begining? Grade? Hardness? Precision of
grind?

2. Can you clamp them up in a lathe to redo or cut your own maching
on the end?

Yes.

Will that bugger up the grooves?

Not if you're careful

How hard can you clamp them up?

Depends on the depth of your collet and how much you want to take off each
pass.

Is that going to vary from screw to screw?

Generally speaking the ends will be soft and the threaded portion will be
case hardened somewhat.

--hold in a collet or with bored soft jaws, and use carbide cutting
tools--shouldn't be a problem long as you're not using a low end hobby
lathe.

"Bob La Londe" wrote in message
...
When I am looking at ballscrews I see mostly metric ones out there so
please tell me about the numbers.

1. What do the numbers mean?

For example:

C3 6-1mm L145

I am guessing 6 is the diameter, and 1 is the pitch. L145 is probably
the overal length including machining.

What is the C3 or C7 at the begining? Grade? Hardness? Precision of
grind?



2. Can you clamp them up in a lathe to redo or cut your own maching
on the end? Will that bugger up the grooves? How hard can you clamp
them up? Is that going to vary from screw to screw?



Oh almost forgot

http://www.nsk.com/products/precisio...allscrew/#tab2

http://www.thk.com/us/products/class...rew/index.html

http://www.steinmeyer.com/content/cn...id_1265/iso_en