acme screws

[cueshark]

i am wanting to know the difference it will make other than speed between 5/8x6 acme & 1/2x10 2 start? i can buy the 5/8x6 for $$13.99 for 6ft. the 6ft of 1/2x10 2start cost me $53.11. i am just trying to see if the cost differance is worth it? i can get 1"x5 acme for $20.29 for 6ft. i have a small mill & a 13x40 lathe so i can make my on plastic selfadjusting nuts. thanks fo any info any one can give me. greg

[Coogrrr]

The 6 or the 10 is what is going to make the diff here. the more turns per inch gives you more resolution as in 200 steps per revolution x 10 revolutions per inch = 2000 resolution or .002 rather. If your not worried about this resolution like a strict wood machine only doesnt need this much usually then the last part is the whip factor.

With 1/2 inch thick acme you can get longer lengths to move faster with less whip. So 5/8 should in effect whip less but would have less resolution. I would not use either of these at more than 48" unless you slow it way down.

That all being said... I would go for the less costly if you can get supports/bearings/anti-backlash setup on that size (5/8). There is a ton developed around the 1/2" stuff but I would think that you can find items to fit your needs at 5/8 also.

anyone else???


Coog

[mactec54]

Hi Cueshark
The 1/2 10 acme 2 start is ok as long as it has good support and not to
long the 1/2 10 acme 2 start will move 5 turns per inch not 10 turns per inch as said in the last post .200 per turn

[Coogrrr]

as Mac says it is 5 turns per inch the 200 steps x 5 would equal a resolution of .001 then still pretty sharp for wood working. Thanks for the clarification Mac.

Coog