Keller Products Inc. says its cleanable magnetic rods greatly extend the life of filter bags when filtering iron or steel particles. Bag filters, widely used to remove chips and fine particles from coolant or cutting oil, tend to blind rapidly when cast iron or certain types of steel are machined. The new permanent rare earth magnetic rods, easily installed in existing bag filters, extend the life of filter bags by five times or more.

A magnetic rod, sized for a #4, #1, or #2 bag filter, is simply placed inside the filter bag, no installation hardware required. Each rod has neoprene rubber bumpers at each end to prevent damaging the filter bag. An external stainless steel sleeve, which covers the magnetic rod and collects the magnetic particles, can be easily slid off the magnet to drop the collected particles into a waste metal container. The rare earth magnetic rods require no maintenance other than cleaning.