Accrolon® Self Lubricating Bearings
The combination of high continuous service temperature, self-lubricating properties, excellent wear, outstanding mechanical properties, weight reduction, audible noise reduction, and chemical resistance make Accrolon® compounds excellent alternatives to many metallic, composite, and standard bearing materials.
A great choice to replace Babbitt, bronze and Gatke bearings, Accrolon® 9000 series high performance materials offer an even more unique range of opportunities for energy and cost savings.
When To Use Accrolon® Self Lubricating Bearings
- When lubrication needs to be reduced or eliminated.
- When bearing neglect could lead to product liability claims or premature failure.
- When conventional lubricants will not function or cannot be used (as in the food processing and pharmaceutical industries).
- When bearing, lubrication system, and maintenance costs need to be closely monitored.
- When wide temperature ranges, particularly at high temperatures, require bearing performance stability.
- When stick-slip conditions exist.
- When the use of lead (Babbitt) is an issue.
- When high load capacities are needed.
- When resistance to chemical, galvanic, or fretting related corrosion is a problem.
- When weight reduction is desired.
- When galling and scoring need to be minimized.
- When shock loads present a problem.
- When electrical insulation is required.
We converted all of our dryer drum bushings from lubricated brass to Accrolon® 9039. The conversion eliminated all paper scrap due to lubrication contamination improving overall output by 10% alone, allowed increased line speed while extending bearing life by nearly 100%, dramatically reduced the cost of lubrication, eliminated the environmental impact of extruded oil onto the floors and bearing housings and reduced accidents due to slips. The bearings paid for themselves in (6) months from increased production output alone.
The True Value of Self-Lubricated Bearings
Today’s maintenance community must continually search out materials that allow for an increase in performance capabilities in conjunction with total, system based cost savings. The question still remains:
What is the true value of self-lubricated bearings?
Experienced maintenance personnel know that one of the most common failures for bearing designs is when lubrication is not properly maintained. Conceptually, a bearing design that is properly sealed and lubricated should result in trouble-free field service. Unfortunately, this is not the case in most applications. In today’s environments it is fairly common that lubricated bearings are not maintained properly. As a result, the lubrication condition diminishes, the bearing life is limited, and the shaft may be damaged.
System Lubrication Information Since lubrication is inherent in the bearing surface of Accrolon®, you do not have to worry about these bearings drying out. If lubricants are used with Accrolon® bearings, Accro-Seal® suggests not using fluorocarbon oils and greases, as they may soften the PTFE fibers, increasing the bearing’s rate of wear. On the other hand, hydrocarbon oils may actually reduce wear rates by up to eight times. Liquid lubricants can carry away heat and reduce the coefficient of friction. Greases can be used to help prevent corrosion and keep contamination out of the housing. Under some circumstances, additional lubrication can increase the performance characteristics of composite bearings
Bearing Material Comparison
The most obvious difference? This family of bearing materials requires perpetual lubrication. When the lubricating film fails due to contamination or carbonization, the bearing will prematurely wear. Performance of this bearing is entirely reliant on the end user properly maintaining and servicing the bearing question. The return on investment can be achieved in reduced lubrication cost, a safer work environment and reduced downtime.
Additional Performance Differences:
- Lubricated bearing materials have very fine operating temperature ranges. They traditionally span from -40 to +210°F compared to Accrolon® material ranges from –80 to +480°F with a spike to 500°F.
- Once mixed-mode lubrication (grease &/or oil) fail due to particulate ingestion and contamination, this type of bearing can no longer operate successfully.
The differences in liner construction can be seen most dramatically during three periods: first, how coefficient of friction and wear change during the break-in period, second, how the bearing handles contamination in a dirty or unsealed environments, and third, long term bearing life.
Differences in liner construction can also impact performance in the following areas:
- Coefficient of Friction-The required breakaway torque & startup forces required.
- Impact Fatigue-How the bearing handles shock or impact loading.
- Amount of Wear-The orientation of the PTFE in relation to the mating surface as well as the content of the PTFE will impact the amount of wear the finished journal bearing will exhibit.
Accrolon® bearings are considerably less expensive than anti-friction bearings and do not have to be lubricated. They also can be designed to fit into your current housings without any major modification. Additional Performance Differences:
- Reduce the weight and profile of the bearing-in many cases the weight and profile of the bearing can be reduced by over 50%.
No external lubrication is required with the Accrolon® bearing there are no concerns with failed lubrication media resulting in shaft damage.
Accrolon® 9000 Series Bearing Materials
Accrolon® 9039 A proprietary blend using PEEK® as the base polymer. This material is capable of running at speeds up to 1000 fpm with very limited lubrication.
Accrolon® 9090 The blend is the same as the 9039, but PPS is used as the base polymer. Developed to offer a low cost alternative, it does require lubrication and it has lower speed and load capabilities.
The Next Generation of Accrolon® Bearing Materials
Accrolon® 9039 HT Developed using Victrex’s PEEK® HT. This new bearing material will have higher heat tolerance and wear resistance. Accro-Seal is working closely with Victrex to develop a bearing grade material for more demanding applications. Accrolon® 9039 HT will operate at a continuous temperature higher than Accrolon® 9039 and it will also have a greater wear resistance.
Accrolon® 9300 Accro-Seal is currently working with long carbon fibers for higher load capabilities and extreme wear resistance.
Accrolon® 9139 This proprietary new blend has bend formulated using PEEK® and ceramic particles to distribute heat evenly throughout the bearing and eliminate hotspots.
Accrolon® 9190 This proprietary new blend has bend formulated using PPS and ceramic particles to distribute heat evenly throughout the bearing and eliminate hotspots.
- Reduced oil migration
- Cleaner and safer machinery
- Reduced lubrication consumption
- Will not gall journals
- Chemical resistant
- Longer lasting with lubrication failure
- Agitator Bushings
- Dryer Drum Bearings
- Calendar Roll Bearings
- Couch Roll Bearings
- Sheave Roll Bearings
- Pillow Block Bearings
- Rewinder Bearings
- Unwinder Bearings
- Thrust Washers
- Wear Bands
- Jordan Bearings
- Evaporator Bearings
- Sleeve Bearings
- Self Lubricated
- Longer life
- Chemically Inert
- Custom Designs
- FDA/3-A when requested
- NO lubrication EVER needed
- Non Corrosive