Introduction to Working with Linear Bushings: Bushings vs. Bearings

Continuing with the Linear Motion theme, up next, bushings, bearings and other linear mechanisms are examined.  Beginning with an explanation of bushings versus bearings. Dynamic bearing systems are, at their most basic level simply an engineered hole/shaft interface that is ...

Mastering Ball Screws Pt. 4: Increase in Ball Screw Speeds

The need for speed! Increasing speed will increase accuracy and there are a variety of challenges to overcome to get that optimization.  To review, a ball screw is a mechanical element that converts motor’s rotary motion into linear motion.  Therefore, ...

Mastering Ball Screws Pt 3: Ball Screw Operating Performances

Friction is one factor in ball screw performance.  There are 2 different friction torques affecting screw operation performance.  Each friction torque is dependent on the type of feed screw. Feed screw is a mechanical element used to convert rotational motion ...

Mastering Ball Screws Pt. 2: Ball Screw Preloads

Preloading is used to increase the feed accuracy and rigidity of ball screws. Why is this necessary? In many applications utilizing ball screw actuation, position accuracy is of utmost importance. With many ball screw driven actuators, position accuracy can be achieved ...

Mastering Ball Screws Pt. 1: Steel Ball Recirculation System and Characteristics

Ball screws are one of the many components seen throughout factory automation applications. Using the same concept seen with a bolt and nut, this assembly uses the rotary motion of the screw to actuate the nut in a linear direction. ...

An Introduction to Aluminum Extrusion and Profiles

The aluminum extrusion (also known by ‘aluminum frames’) forming process is a bulk plastic deformation process. First, a billet of aluminum is preheated to a specified temperature that is still comfortably below the material melting point in order to facilitate ...

How GD&T Form Tolerances Affect Hole and Shaft Fits

The relatively new and sometimes confusing world of Geometric Dimensioning and Tolerancing (GD&T) opens up a whole new world of ways for engineers to control the geometry of everything from every day parts to complicated geometric surfaces. GD&T allows the ...

Workholding Technology Pt. 4: Locating of Workpieces with External Forces Applied

Introduction Another important consideration to take into account when trying to locate work pieces is the role external forces will play in the process. Depending on the machining process that the work piece will be subjected to, there may be ...

Workholding Technology Pt. 3: Locating with the Intention of Avoiding Burrs

Introduction One of the problems faced when locating on jigs and fixtures is the presence of burrs and foreign material on the locating surfaces. These instances occur because manufacturing processes are imperfect and produce chips and rough/raised surfaces.  Burrs are ...

Workholding Technology Pt. 2: Locating Basics

Introduction One of the most common ways of workholding is by location with reference to an external surface. This is also known as locating to a datum surface. Flat surfaces are commonly used for locating. However, there can be various ...