Mona's Machinery Blog

Draw rollers, also known as pull, traction, driven, all have one thing in common: Tungsten carbide (Wolfram) coating.   The primary function of draw rollers are to guide and draw paper. The coatings on the roller determine the "lifespan of the roller." The life of the roller coating depends on the operational use, of course. Typically, however, this coating will last years. How do you know when it's time to repair? When the roller starts to look "smooth" or takes on a glazing appearance, it is time to "recover" your roller.   In my experience most customers that we service don’t have spare or extended downtime to recover. What you need to have is a pre-planned repair which includes: Verifying dimensions Verifying tolerances Knowing the base material of roller Knowing the type of grit (fine, medium, or coarse)  How many times has your roller been recovered Committing to confirmed dates the press will be down to expedite your roller recovering.

The printing industry is ever-changing, but your machines are always running. When things start to fail, how are you supposed to know if it's better to repair or replace your machinery parts? Unless a part has reached its threshold to repair, you should be able to refurbish most mechanical applications. Such as:  Ceramic rollers  Idler rollers used in handling adhesives, hot plastics, sticky material  Draw rollers  Stationary jaws  Former board and noses  Corona Treater rolls  Chrome rollers  We have some more information on our website: http://www.mgf-services.com/coatings   These parts can be extremely costly to replace. I have been repairing these types of parts for decades. If you hire the right company, you can save a lot of money by expertly refurbishing worn parts. However, there are certain mechanical parts where repair/refurbished are not viable options. In these cases, replacement parts are the only recommendation to ensure quality and perform

In today’s technology, thermal coatings have become Surface Engineered Solutions,  which can be overwhelming to companies looking for repair or new applications.  Things to consider:  Materials-substrate/coating/sealer  Temperature-Processing/operating  Shape of part-line of sight  Size of part to be coated  Coating thickness  Operating environment  What are you trying to accomplish?  Wear resistance  Corrosion/chemical resistance  Traction  Release  Low friction  Conductivity-electrical/thermal  Dimension restoration  Abradable surface  My company, MGF Services, provides a large selection of coatings, competitive pricing and reliable service. We have been helping our clients with Surface Coating services in the manufacturing industry for decades. We specialize in all types of chrome and specialty coatings & treatments. Click here for more information:  http://www.mgf-services.com/coatings