Product Announcement from Daemar Inc.
The DMR Fiber Wound Series bearing is a high load, low RPM bearing designed for rigorous industrial equipment applications. The bearing is manufactured by a filament winding process that results in a continuous fiberglass filament backing. This composition yields excellent mechanical properties especially fatigue resistance. The filament wound fiberglass structure uses a high strength, corrosion resistant epoxy resin as the matrix material. The high strength backing permits the use of a thin wall (1/16" to 1/8") bearing which can often reduce the size and weight of the finished bearing assembly. Our FW Series will support a bearing load of 30,000 PSI, while handling high radial and axial stresses. They resist high shock loading and impact fatigue due to their unique high strength continuous fiberglass backing. These qualities make the FW bearings ideal for high load operation in rotational and linear motion as well as in oscillation. This family of materials exhibits exceptional dimensional stability and performance predictability over wide temperature ranges (±325°F).
Many OEM design engineers specify a bearing design that may well have life cycle capabilities ten times over what their most strenuous applications require. With that in mind, Daemar's Fiber-Lube™ MRP bearing will perform more in line with the actual needs of today's innovative machine design. Our traditional composite bearing materials, such as the Fiber Wound Series, have less than 0.005" wear at over 1.6 million cycles. That type of wear curve can be unnecessary for 70% of most applications. These issues come together to allow Daemar to supply a bearing better matched to customers' needs, at a better price.
The Fiber-Lube™ HT bearing is a high load, low RPM bearing designed for applications where self-lubrication is desired, but conventional composite bearings will not perform at high temperatures. This product has been designed to provide excellent performance at elevated temperatures. With a glass transition temperature of over 450ºF this epoxy filament wound structure exhibits superb performance over extended exposure to elevated temperatures. The bearing material is focused on applications where the bearing will be exposed to temperatures up to 450ºF.
In addition to its high compressive properties (in both static and dynamic modes), this bearing material is inherently self-lubricating. The self-lubrication capability of our new material means that the use of expensive high temperature external lubricants such as polyurea grease, lithium grease, some bentone greases, as well as advanced ester based oils and complex thickening systems may no longer be necessary.
The Fiber-Lube™ HT bearing creates a high strength, self-lubricating journal bearing material that can offer performance enhancements over greased systems, as well as graphite impregnated bronze bushings, some iron-copper graphites, polysulfone, PEEK, and polymide bearing materials.
The Fiber-Lube™ FT bearing is used for applications where a slightly higher surface velocity, when compared to the Fiber-Lube™ FW Series, is required. Similar to the FW Series bearing, the FT bearing is manufactured by a filament winding process that results in a continuous fiberglass filament backing composition-ensuring excellent mechanical properties (especially fatigue resistance) are attained. The filament wound fiberglass structure uses a high strength, corrosion resistant epoxy resin as the matrix material. The high strength backing permits the use of a thin wall (1/16" to 1/8") bearing which can often reduce the size and weight of the finished bearing assembly.
These differences are driven from the fact that the FT bearing uses a filled PTFE resin structure as opposed to the continuous PTFE filaments used in the FW product. Two liner thicknesses are available with the 0.015" thick liner being standard and a 0.030" thick liner being available for unique applications. The 0.030" thick liner is designed for applications where boring the inner diameter might be required in order to achieve tighter tolerances in an effort to address sizing and minor misalignment conditions.
The Fiber-Lube™ IFR bearing offers the same inherent anti-friction components that allow it to achieve the low wear characteristics of the FW and MRP series bearings. However, in comparison to these two products, the IFR bearing (for Improved Fatigue Resistance) offers a proprietary laminate structure of the bearing backing that increases the bearing's resistance to repeated stress/strain conditions.
Several years ago, Our manufacturer was approached with a seemingly straightforward application for traditional filament wound composite bushings. At issue was an application that was resulting in bearing failure after just 10,000 oscillatory cycles. The pressure on the bearing was well under the design threshold (actual applied pressure to the bearing was 10,000 PSI). In response to this customer's demand, they developed an improved impact fatigue bearing that in the case of the above application increased the life of the bearing by over 50% and now Daemar can offer this product to you.
Because composite filament wound bearings are not isotropic materials as are metals, the Company 's FEA laminate analysis focused on what was believed to be the limiting factor: optimization of system's inter laminar shear. The Fiber-Lube™ IFR bearing offers a more than two fold increase in the impact fatigue over traditional composite bearing materials.