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Select Rip Saw Maintenance

Consistent rip saw maintenance is what keeps a Mereen-Johnson Select Rip Saw producing glue-line quality cuts and meeting its full 24-hour-shift duty cycle. On a moving-blade Select Rip Saw — with multiple shifting saw assemblies, an air-actuated arbor brake, anti-kickback finger systems, and integrated laser alignment — that maintenance program touches more components than on a fixed-arbor saw, and the safety considerations are correspondingly more involved.

In the video below, we highlight essential safety features and operational tips for your Mereen-Johnson moving-blade Select Rip Saw. Whether you’re new to the equipment or an experienced operator, the walkthrough is an essential reference for ensuring safe, efficient use of the machine — and the basis for a well-grounded rip saw maintenance routine.

What You’ll Learn From the Video

This walkthrough covers the safety features and operational practices every Select Rip Saw operator needs to know before running the machine. By the end of the video, you’ll understand:

  • The full anti-kickback finger system — both the upper claw-type fingers mounted from the pressure beam and the lower fingers mounted in the table, including how the captive cam maintains 1/32″ clearance through the full range of stock thickness
  • How the arbor brake works — the normally-closed spring-loaded drum brake that’s held open pneumatically during operation and stops the arbor in approximately 15 seconds when the stop button is actuated, the saw pit door is opened, or air pressure or power is lost
  • Pressure beam and guarding — including the outfeed pressure beam chain guard and the pivoting pressure beam side guard
  • Safe operating practices for moving-blade Select Rip Saws, including stock feeding, monitoring the laser alignment system, and operator positioning
  • Daily safety checks before starting production

The video is filmed on the actual machine and demonstrates each safety feature in operation, making it a useful resource both for new operator training and as a refresher for experienced operators.

Why Select Rip Saw Maintenance Is Different

Mereen-Johnson Select Rip Saws use independently shifting saw assemblies that move along the arbor under operator or optimization-system control. That design delivers significant yield and flexibility advantages over fixed-arbor saws, but it also introduces additional maintenance and inspection points:

  • Shifting saw assemblies each have their own carriers, traveling shoes, and positioning hardware that need to be monitored for wear and proper function
  • Integrated laser alignment systems support up to six laser lights, with traveling lasers that move in sync with each shifting saw — meaning laser stand and reference systems need to be kept clean, calibrated, and free of contamination
  • Pneumatic systems for the arbor brake, air-loaded press rolls, and air-loaded traveling shoes all require routine air pressure and component condition checks
  • Oil mist lubrication systems with automatic shut-off for low oil levels need to be checked daily to ensure continuous protection

A baseline maintenance program for any Select Rip Saw should include daily cleanliness checks, weekly chain and pressure beam inspections, monthly chain switching, and 6-month deep inspections of the spindle, drive components, and brake system. For complete schedules tailored to your specific machine, see the model-specific maintenance guides linked below.

Daily Safety Checks Before Starting Production

Before starting production on any moving-blade Select Rip Saw, walk through these checks:

  1. Verify both upper and lower anti-kickback finger systems are intact, free of pitch buildup, and operating correctly. The upper fingers should maintain 1/32″ clearance from the chain through the full range of stock thickness.
  2. Test the arbor brake by confirming the arbor stops within the specified time window (typically 15 seconds) when the stop button is actuated.
  3. Confirm the saw pit door interlock is functional — opening the door should engage the arbor brake.
  4. Check the pressure beam guards — both the outfeed chain guard and the pivoting side guard should be in place.
  5. Verify air pressure is at the correct level for the brake and pneumatic press roll systems.
  6. Check the oil mist lubrication system for proper oil level — the low-level shutoff prevents the machine from running dry, but you don’t want it tripping mid-shift.

These checks take under five minutes and protect both your operators and the long-term mechanical condition of the saw.

Related Maintenance and Reference Guides

For the full rip saw maintenance program on your specific Select Rip Saw, review the model-specific guides and broader reference resources below:

Need Service or Operator Training?

If you’re setting up a maintenance program for a new Select Rip Saw installation, training operators on safe machine use, or planning a major service event (chain replacement, arbor service, brake rebuild), our factory team can help. Mereen-Johnson technicians have hands-on experience with every Select Rip Saw we’ve built and can provide on-site operator training, scheduled preventive maintenance visits, and exact-fit replacement parts.

Contact Mereen-Johnson or call (612) 529-7791 to speak with our team about your Select Rip Saw maintenance and training needs.