Simplicity in the Woodworking Industry

Simplicity in the Woodworking Industry

Simplicity®. Building credibility within the woodworking industry

Antifriction linear bearing systems are crucial to the production output, accuracy, and repeat-ability of today’s modern CNC routers and water-jet cutters. The woodworking industry relies on these machines to rapidly mass produce products ranging from door panels to structural framing for cabinets. A prominent byproduct within the industry is sawdust.

The sawdust problem

Sawdust build-up can cause premature failure in rolling-element, antifriction linear bearing systems. It finds its way through their best sealing systems and quickly clogs the ball tracks of conventional linear ball bearings. When the ball tracks jam, they start spalling the shafts (grooving) that bearings are run along, causing a faster ingress of sawdust through the shaft groves, and eventually resulting in the complete failure of the system.
Generally, sawdust and other common environmental factors pose several problems in rolling element bearings. Contaminants and debris can become stuck in the bearing cage and cause the system to seize up and fail. Vibration causes the bearings to shift off their track or become dislodged. Both outcomes lead to catastrophic failure and unplanned downtime, creating lost profits and increased production time for the manufacturer.

 
Retrofitting an industrial sander

In this woodworking industry example, a manufacturer was using a commercial wood sander for fast sanding of large furniture. The wood sander station sits on a 180 lb steel base and uses high-speed oscillating motion (1735 RPM) for short, 4 mm strokes. The oscillating mechanism is operated by two cam assemblies running with a roller bearing in between. As the system runs in short reciprocating motion, the sanding mechanism is operated. This wood sander is under constant use by two labor shifts for a total of 16 hours a day, six days a week until it breaks down.

The issue they had was that their sanding table would only successfully function for about a week before failing. This would lead to a costly cycle of replacing damaged parts and awaiting the next shut down. PBC Linear engineers were brought in to examine the internal components, and they recommended a complete swap out of the failing rolling element bearings with customized Simplicity® plain bearings.

The reason was, for the old roller bearings to function properly, precise alignment was crucial. The slightest misalignment resulted in grinding between the cam and roller bearing. High friction and heavy shock loads caused fretting on the system. In fact, shop employees commented that contact between the roller bearing and the cam system would create friction and heat, causing the roller bearing to glow red. Even when lubrication was applied, misalignment and high temperatures (110°F) as well as grinding would persist, and the system was unable to last a full week.

The PBC Linear Solution

Simplicity plain bearing products can handle up to 20-times the load of a traditional rolling element bearing. The proven technology of their proprietary Frelon® liner supports an even disbursement of forces, while rolling element bearings provided limited point of contact and cannot effectively disburse heavy loads. Simplicity products also excel in rotary and oscillating tasks, and resist binding in dirty workshop environments like wood chips and sawdust.

Simplicity plain bearing products can handle up to 20-times the load of a traditional rolling element bearing. The proven technology of their proprietary Frelon® liner supports an even disbursement of forces, while rolling element bearings provided limited point of contact and cannot effectively disburse heavy loads. Simplicity products also excel in rotary and oscillating tasks, and resist binding in dirty workshop environments like wood chips and sawdust.

For this particular application, PBC Linear designed an optimized bearing assembly that would rock along with the motion of the cam system—completely eliminating misalignment issues. We used an internal, periodic lubrication system to facilitate smooth oscillating motion. This extended the life of the system from one week to over a year of smooth, non-stop and maintenance-free performance.

The manufacturer noted significant cost savings as a result of life improvement. Weekly replacement parts for the previous internal design had amounted to $300 per week. Our new bearings netted the company $15,000 in annual cost savings! Overall, the manufacturer was pleased with the new Simplicity bearing assembly for its enhanced system integration, quieter operation, and cost savings.
The benefits of Simplicity within the woodworking industry

Linear motion technology from PBC Linear is designed to last, in part due to its patented FrelonGold® liner, and also because it contains no moving parts. The liner helps to greatly increase load and speed capacities, tolerate a variety of different environments, and avoid catastrophic failure. Extreme heat and cold, contamination, debris, submersion, and shock vibration do NOT affect the performance of the bearings. The patented, self-lubricating design also requires virtually no need for further lubrication. For the woodworking industry, the liner helps the bearings to harmlessly absorb wood shaving debris and continue optimal function even in high vibration areas such as water-jet cutting or sawing.