Tagged: ball screws

Why Does Steinmeyer Rarely Make a Ball Screw by Cutting an Existing Shaft?

Some manufacturers of ground ball screws produce long threaded shafts in quantity and then cut them down as needed to make shorter units.  This is not our normal business model.  Steinmeyer will do that on very rare occasions to save some time but only if the quantity desired is one or two pieces, and of course provided the longer shaft is available.  Why? Continue reading

Why are Ball Screw Deliveries so Long?

Steinmeyer manufactures more than 250,000 ground ball screws per year – or close to 5,000 per week.  We are often asked what some may consider a pretty simple question -“how long does it take to actually manufacture a ball screw?”  The reason we think this question is not so simple is because there are several issues to consider: machining time, assembly time, inspection time, machine maintenance time and the usual culprit for delays – production scheduling.  Continue reading

Ball Screw Repair

There are millions of Steinmeyer ball screws in use today and we are often asked “does Steinmeyer offer repair services for ball screws?”  And the answer is yes, for very limited situations.  However we are aware that many ball screw users routinely get screws repaired at companies whose main business is repair – and one has to be very careful about what to expect of such a repair. Continue reading

Looking for a Replacement Ball Screw in Your Machine?

Steinmeyer is a global leader in ball screw manufacturing.  Our focus is on the OEM market, which to us means anyone who makes as few as several machines per year to those that build and ship thousands.  We do not focus on machine rebuilders or end users.  We are often approached by end users seeking replacement ball screws for their machines – and our reply is often a polite “sorry, no, we cannot sell you a Steinmeyer ball screw”.  Continue reading

There are two basic principles for ball recirculation

Dual start ball nut with external return

Let’s sort it out: Ball recirculation is the single most important design detail when it comes to ball screw performance. Why?  Because it determines how smoothly the balls recirculate as well as running performance and product lifetime.  And there is still no generally accepted nomenclature for this characteristic. Result? Engineers use hands and feet, lengthy explanations and quickly drawn sketches to make sure everyone understands what they are talking about. Continue reading

How much load can a ball screw carry?

There is enormous confusion about this subject. And granted, it is not easy. There are generally two figures given for a particular ball screw, the dynamic load capacity, and the static load capacity. Do they mean that you can put a load up to to the dynamic capacity on the ball screw wile it’s running, or a load up to the static capcity wile it’s not? No to both! Continue reading