Tagged: ball screw

Double vs. Single Nuts

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.

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Combination Wipers

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:

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Steinmeyer Inc. has a New Representative

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. 

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Ball Screw Load and Life Ratings

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:

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Newest Factory Expansion Almost Completed

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.

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Ball Screw Alignment and Mounting Tolerances can Critically Affect Reliability and Life

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!

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