Our team is using a scissor lift to place blocks and the climber hook for this year’s game. The lift itself is working properly. We are using Igus lead screws vertically to drive it up and down. The nylon lead screw keeps breaking. I am wondering what kind of lead screws are more reliable and where I could get them? Thank you.
ACME thread lead screws and metal nuts are probably designed to handle the load you are applying. But you’ll probably have to do some fabrication work to make it fit, and the turns-per-inch that you have now, may not be readily available.
McMaster Carr has an assortment. Some of them are expensive.
Haydon-Kerk is also a good source for lead screws. Definitely not cheap, but good stuff.
It looks like the ones on McMaster Carr takes a lot of fabrication. Most of the ACME nuts are not flanged and are hard to attach. The flange on the flanged ones seem not big enough to drill some holes to attach to a metal plate. Could you give some suggestions on how we could mount those?
Ballscrews are pretty cheap on amazon, and offer higher efficiency than a leadscrew. Usually they come with easy-to-mount bearing blocks and nuts as well.
Thanks for your response. The flanged lead screw nuts on this source has a dynamic load of 350. I am not sure what that means but igus offers comparable options. ACME lead screw nut made of iglide® L280 I am still not sure about which one to get.
Use ROTON.
We use them a lot and love them.
The nylon nut will take the loads just fine. That’s what we use but they are $25 a piece for 1 nut. They work.
Maybe if we could see some pictures of your robot, and see how it is breaking, then we could offer more helpful suggestions.
The lead nut is breaking at the flange.
yes, I know it’s breaking, but if we see the robot design, we might be able to estimate how much load is on it, or offer suggestions of other ways to fix it. We have to make a lot of assumptions, and we can only guess.
Sorry I was having trouble posting pictures
Are you connecting the nut at the bottom level of your lift or towards the top?
We have done both and both broke. In that picture the flange is at the bottom.
It should take less force to get it started if you push up starting on the top level. Have you considered putting your lead screw in the middle and pushing up on both side of the lift at the same time?
We actually fitted the screw inside a wood block and sealed both ends with metal plates but it still broke. I’m trying to find a super strong flanged nut that can easily be mounted since we only have the six hours out of bag time to work on the robot.
Were you able to lift it up by hand if you pulled up on the top level? If so, I can’t imagine why the flange would break when attached at that same point.
We have also used Roton. Although we bought the Hi-Lead type. For your application you may want the Acme.
https://www.roton.com/products/hi-lead-screws-nuts/general-information/