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....
I have learned so much in the Machinery Parts, Service, Repair, and Machine Shop industry, specifically with Printing machines, packaging machines, and converting machines, that I wanted to start to share it with the world. If I can educate others about this very interesting field, and help them save money in the process, I'll feel really good about this.