ME EN 7960 – Precision Machine Design – Alternative Linear Motion Systems 5-7 Brushless DC Linear Motor (contd.) • The DC brush linear motor is ideal for long stroke, open or closed loop servo, linear motion applications with speeds from 1 in/s [25 mm/s] to 100 in/s [2.5 m/s]

Jul 1, 2010 · Instead of riding on rolling balls, plastic linear bearings ride on sliding elements. Because they have no moving parts, they can accelerate faster. In fact, only heavy loads and drive and...

In contrast, linear-motion systems with rolling elements are either recirculating or non-recirculating … • Non-recirculating types use rolling elements such as bearing

Sep 8, 2013 · The idea is to build a mechanism that creates precise large-displacement linear motion, without using precision mechanical components like ground metal rods, ball bearings, and so on. This page presents a design based on compliant mechanisms.

May 23, 2015 · Isn't it possible to do without ball bearings for linear motion ? Flat metal on flat metal with a lubricant in between ? The bridgeport and sherlines mills do it this way.

Aug 15, 2018 · It is possible to achieve linear motion without bearings but moving a load without a bearing requires a lot more effort. Using a bearing significantly reduces the friction. For example the coefficient of friction for a recirculating ball bushing can be as low as 0.001 whereas steel against steel (with lubrication) has a coefficient of friction ...

Flexures are nice because they allow controlled relative movement without bearings. Creating them on the waterjet is easy, but care must be taken to use appropriate designs and aspect ratios. Some uses for flexures include springs, precise linear motion, preventing bearing shaft over-constraint, and precise small rotary motion.

Dec 6, 2009 · I came up with this design for linear motion that I hope will eliminate the need for bearings or lead screws, ect. I just want some engineering opinions on whether it will work or not. One of the gears is driven by a motor, the others basically copy the movements of the first.

Dec 6, 2009 · Linear and Rotary Motion; Linear motion without bearings; If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. ...

Nov 18, 2013 · Rolling-ring friction drives generate linear motion without ball screws, clutches, or gears. Rolling-ring drives come in both fixed-pitch and variable-pitch models.