Lead Screw vs. Ball Screw Technology

Рет қаралды 161,158

12 жыл бұрын

Ball screws and lead screws can sometimes be used in the same applications. Typically, ball screws are used in industry applications that need a lot of load or life while lead screws are used in smaller, lighter duty applications. Lead screws however are highly customizable with the ability to interchange leads, sizes, nut configurations quickly. Cost is usually not the primary consideration when selecting a screw technology. Watch this video to learn the differences.

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@littleratbag1111 3 жыл бұрын

Had the pleasure of working for Thomson IBL in Barnstaple between 1995 and 2003 completed my apprenticeship with them. Great guys great times I used to work on a deckel DC30 A milling centre which we would work on the ball screw nuts, doing all the ports for the ball transfer types the lubrication holes and flanges to the threaded holes for the wipers to be held in by grub screws. The square type nuts were heavily machined on the DC30, sometimes taking up to 40 mins to complete one nut! I’ve done every aspect of the process of making a ball screw start to finish, including working in the assembly area for a long period towards the end. I have never had a job as good as that one since! Miss the guys and the atmosphere shame it all had to come to an end in March 2013 :-( RIP Thomson IBL Westacott road Barnstaple. The building remains in other use but never forgotten 👍

@RUOCCOAU2 2 жыл бұрын

Hello is possible manufacture shaft more Big diámeter about 10 inch . Long 6 mts for Elevator system. ? How cost

@lavh93 3 жыл бұрын

What is your recommendation if I'm mostly going to be working with hardwoods on a CNC?? Looking to be using aluminum extrusions, four 425 oz/ in nema 23 steppers with 2" x 3" feet work area. 3 axis. Thanks btw great vid

@mannyfilmsinc 5 жыл бұрын

Great video, on a small cnc milling machine, driven by stepper motors with timing pulleys, would you suggest ballscrews or leadscrews?

@ThomsonIndustries 5 жыл бұрын

It would be hard to suggest a product without more application information. There are many factors: Load expected, life desired, precision of location (over lifetime) length of the screw, torque of the motors used can produce and speed of the move. With no other information i'd say a lead screw might be a good choice. But ball screws are often used in milling machine applications. And another factor is personal preference. If you would like more assistance in selecting a product feel free to contact us directly or one of our distributors. www.thomsonlinear.com/en/support/global-customer-service

@qaz179 11 жыл бұрын

Nice vid . Thanks.

@user-gy9hg8tv8b 5 жыл бұрын

Hello .... I am currently working on a scientific research on cnc machines and I need a source address on the types of screws ..... Can you tell me the name of a reliable scientific source ???? Please 🤗

@thepreserver83 4 жыл бұрын

on dust environment which one can be used, linear gear or Ball Screw or Rack-and-pinion ?

@ThomsonIndustries 4 жыл бұрын

Ball screws have been used in dust environments. Yes keeping the dust out of them can be tricky or their life can be shortened. Sorry we don't offer linear gear or rack-and-pinion so we can't offer guidance there.

@bearup1612 3 жыл бұрын

I have a question. What would be better to remove backlash on a lathe or milling machine. Thanks for the video

@ThomsonIndustries 3 жыл бұрын

Ballscrews can be preloaded, lead screws generally have anti-backlash nuts options. Which would be best would depend on the specific application. However preloaded nuts often will be the better choice.

@bearup1612 3 жыл бұрын

@@ThomsonIndustries Thanks for the information Have a great day

@ravenfeather7087 4 жыл бұрын

I'm trying to find a device to life the top of a pop-up camper and saw a video of a gentleman using what he called a lead screw system but provided no other specifics. Do you know what he's talking about and where I can find such a device?

@ThomsonIndustries 4 жыл бұрын

Sorry no. It could be a lot of different things.

@sathishr7774 4 жыл бұрын

Does placement of linearguide for carrying load play any role in torque of ball screw.i mean will there be any moment created if the guides are placed away

@ThomsonIndustries 4 жыл бұрын

The ball screw should only be providing the thrust. The linear guide should be resisting the moment and side loads. With properly applied linear guides the only change in torque on the ball screw would be a function of the amount of axial load it needs to produce. Ball screws are not meant to resist side or moment loads. Hope this helps.

@sathishr7774 4 жыл бұрын

@@ThomsonIndustries Thanks , also my application as to move loads to 3 mm precision. The loads are about 200 kg , supported by guide rails. It is on a moving vehicle , so there are inertial loads/vibration coming from ground to vehicle. The vibration comes around 0.5 g , so the vibrating force is about 1000 N. So I am more concerned about backdriving and dont want to invest money on brakes.Will lead screw be suitable for it. Also in the video you showed for the back drive test , will ball screws back drive with low lead angle . (Assume same mass)

@ThomsonIndustries 4 жыл бұрын

@@sathishr7774 In general Ball screws back drive much easier than lead screws. Back driving can be impacted by drag torque of the guides, bearing supports, wipers and drive motor (if any). There are a lot of variables. Each case should be looked at individually. For a review of your specific application contact our support team. Link to support information is www.thomsonlinear.com/en/support/global-customer-service

@jaganathrao1507 2 жыл бұрын

SUPER TQ SIR!

@ehabahmed615 4 жыл бұрын

sorry i cant understand Which one is has a bad test back drive ball or lead screw ?

@ThomsonIndustries 4 жыл бұрын

Lead screws are the ones that are harder to back drive.

@franciscolora8129 5 жыл бұрын

Hello, we are building a extrusion machine, is better the lead screw?

@ThomsonIndustries 5 жыл бұрын

There are many factors to consider such as loads, speeds and environment. Being an extrusion machine I would anticipate the loads to be quite high and would look at ball screws first. Also feel free to contact our customer support and they can help www.thomsonlinear.com/en/support/global-customer-service

@triumfdula9734 3 жыл бұрын

Hello, wanted to ask about lead screw. Why do we need bearings while the lead screw is attached to the coupler and stepper motor, isn't the stepper motor and the coupler plus the housing, enough for the stability of the lead screw or in other words, what is the purpose of the lead screw bearing ? to cnc router ?

@ThomsonIndustries 3 жыл бұрын

If the motor bearings and coupler can provide enough support then yes that could work. however if there are large thrust loads the motor bearings may not be designed to handle those loads. The question would be good to ask the motor supplier.

@triumfdula9734 3 жыл бұрын

@@ThomsonIndustries As i understand you, the motor bearing and the coupler screw would not hold tight the lead screw so it would slip and not rotate in large thrust / loads ? in this case we would need an extra bearing to tighten the lead screw, right ?

@ThomsonIndustries 3 жыл бұрын

@@triumfdula9734 I would recommend contacting a coupler manufacturer and discussing how to connect one to a lead screw. Typically the screws ends are machined to fit a particular coupler. See www.thomsonlinear.com/en/training/lead-screws/custom

@ModitRC 5 жыл бұрын

What is better for building a 3d printer?

@ThomsonIndustries 5 жыл бұрын

Would depend on many factors (Speeds, loads, life expectancy). However desktop sized 3D printers tend to be built with lead screws.

@jamescullins2709 2 жыл бұрын

what about dual bearing ball-screw vs single bearing ballscrew?

@ThomsonIndustries 2 жыл бұрын

Hello James. Not sure I follow. Do you mean a multi start screw with multiple circuits in the nut vs a single start nut with one circuit in the nut? www.thomsonlinear.com/en/training/ball_screws/lead_vs_pitch If so the multiple circuit allows for more load capacity. On a multi start screw the mating nut can have the multiple circuits intertwined and it makes the nut more compact then having them one after another.

@jamescullins2709 2 жыл бұрын

@@ThomsonIndustries Well, I mean one screw with two ball bearings one after the other and one mount. I think to eliminate backlash I think they can be separated but I would not attempt it without checking with someone smarter than me.

@ThomsonIndustries 2 жыл бұрын

@@jamescullins2709 Sounds like you may be describing a double nut or skip lead preload. Have a look at this page and see if this is helpful www.thomsonlinear.com/en/training/ball_screws/preloaded_nut

@ABW941 3 жыл бұрын

I wonder, are there ball screws with non circulating balls? I mean balls which stay in place but are able to rotate.

@ThomsonIndustries 3 жыл бұрын

What would the advantage be? Recirculating balls provides benefits.

@ABW941 3 жыл бұрын

@@ThomsonIndustries I thought the whole mechanism would become less complicated, and more compact. I wonder if non circulating balls would suffer more from abrasion since they would move in a different way?