Written by [google_authorship] on 11th September 2020
components are always susceptible to harsh conditions, especially those with a
rolling action like ballscrews. There are plenty of protective additions for
other components such as rail covers and protective casings, but the nature of
ballscrews makes them particularly vulnerable.
ballscrews safe from extreme temperature changes and contamination is more
difficult than with other components, but not impossible. Taking the appropriate
measures can absolutely help prevent failure and extend the life of a ballscrew
Materials Used in Ballscrews Manufacture
used in the ballscrews manufacture process
can determine how resistant to contamination they are. The material used is
especially important if the ballscrew assembly will be exposed to liquid
contamination such as water, oils and acids, and even the likes of alkaline
Parts of the
ballscrew to pay special attention to here are the screw shaft and ball nut
housing. They are sometimes made with stainless steel which helps protect them
from water and certain chemicals, but they are usually made with non-stainless steel
so they can handle heavier loads and maintain a reliable rigidity. In the
latter case, other materials can aid with the protection from contamination.
some screw shafts and ball nuts will benefit from a additional protective
coating. This can be in the form of black oxide, thin dense chrome or electroless nickel plating
which can be applied to either the screw shaft, the ball nut housing or both.
Which option is
better for which application can depend. Obviously the stainless steel is more
naturally protected from contaminants but this is in exchange for a reduced
load capacity. The downside of a protective coating is the potential for the
coating to flake or separate under extreme loads. The coating will also add a
few microns of thickness to the surface which could have an effect on the ball
Ballscrew Seal Variations
Seals are a
potential solution to protect ballscrews from contamination and serve the
additional purpose of keeping lubricant in the raceway. Companies specialising
in ballscrew manufacture usually provide a range of seal designs including full
contact seals and brush seals.
seals match the size of the ballscrew raceway to prevent all liquid or solid
contaminations from entering. Brush seals are designed to prevent solid
manufacture process also offers the opportunity to build seals out of a variety
of materials. The most common is FKM, a synthetic rubber and fluoropolymer elastomer. Another popular option is EPDM (ethylene
propylene diene monomer), which is another synthetic rubber that is
particularly efficient against certain chemicals as well as being able to
withstand high temperatures.
If you require any ballscrews
or other products made by ballscrews manufacturers, then contact
who are the UK’s leading ballscrews suppliers who keep local stocks ready to
ship out fast and free all over the UK and the rest of the world.