Like all motion control devices based on contact friction, ball screws require lubrication for proper functionality. The reason is that lubrication is required for smooth recirculation of the rolling elements.
Customers often ask us: what type of lubricant is best for my ball screw application? And which is better, oil or grease? The truth is that both oil and grease can perform well in a variety of situations.
Double Nut vs. Single Nut
In the Steinmeyer view of ball screw design, a double nut is always associated with 2-point contact. The advantages of 2-point contact are numerous: lower friction, more consistent torque, higher stiffness, and longer life.
Proper functioning wipers are an essential element of any ball screw system. Their first job, of course, is to shield the contact surfaces from contamination. But some wipers may also serve as a lubricant reservoir, thereby lengthening service intervals. Fortunately, Steinmeyer offers the industry’s widest choice in wipers:
Steinmeyer recently added a key individual to its USA sales force. He is Bruce Gretz. Bruce has 30 years’ experience in various high tech businesses including Loral and Rockwell.
Steinmeyer recently added Custom Precision Solutions (CPS) as our representative for the southeast USA. Dominic Mastroianni, president of CPS, is located in Wake Forest North Carolina and covers the following states: Maryland, Virginia, North Carolina, South Carolina, Tennessee, Georgia, Alabama and Florida.
Steinmeyer is a unique group of three companies with individual competences that enable us to provide world class products for our customers. The dominant entity, Steinmeyer GmbH, is a premier manufacturer of precision ground and rolled ball screws.
Seems there is still a lot of confusion on load and life ratings when it comes to ball screws. Many people are familiar with the classic L10 life equation L10 = (Ca/P)^3 x 10^6 revolutions where Ca is the dynamic capacity in N and P is the mean applied axial load in N. Recently we fielded several inquiries on applications where an engineer wanted to know whether s/he can apply a force equal to Ca and achieve 1 million revolutions of life. Or even higher than Ca and achieve less than 1 million revolutions. The basic answer is NO! Here is why:
In 2006, the purchase of about 20,000 sq.m. of land marked the beginning of a new era for Steinmeyer. The first large production building expansion was completed in 2007 offering ample space for more machines and other equipment. It is connected to the existing factory building by two indoor pull-through loading/unloading positions with a 20 ton bridge crane.
Often customers are a little surprised when they embark on the Geometric Dimensioning and Tolerancing (GD&T) phase of their design asking – “why must I design in such tight alignments, concentricity and squareness?” The answer is simple… so the ball screw will operate at its fullest efficiency and anticipated life!