524-DDC/SR Edging Rip Saw

The Mereen-Johnson 524-DC/SR Edging Rip Saw is a double arbor rip saw that edges and rips lumber in a single pass. As an edging gang rip saw, its first arbor carries two shifting hoggers that hog off the wany, irregular edges — working as a board edger saw — while the second arbor gang-rips the cleaned board into finished strips. That makes it a hogger rip saw and precision gang saw in one machine: edge, then rip, for maximum yield with less handling.

524-DCC.pdf

Specifications

Capacity	24” arbor space, thickness to 2-1/2” using 14” dia. tooling, 30” min. length for glue joint accuracy.
Shifting Saw(s)	First arbor: Two shifting hoggers Second arbor: One to four shifting blade(s) in combination with fixed center blade. 1” min. width net rip between saws.
Arbor Drive	Direct drive 75 HP, 3600 RPM TEFC Mereen-Johnson saw arbor motor (no belts to tension or replace).
Feed Drive	10 HP with variable frequency speed control, infinitely variable, 30’-235’ per minute.
Feed Bed	“Posi-Feed” friction feed bed of structural aluminum feed slats with replaceable steel backed rubber inserts carried on precision Double-Vee hardened steel feed chains and track. Oil mist lubrication of feed system with low oil level auto feed shut-off.
Hold Downs	Eight 4″ dia. air loaded press rolls. Air loaded traveling shoes provided for each shifting blade.
Anti-Kickbacks	Single lower, double upper infeed. Single upper outfeed.
Dust Collection	Two 10″ dia. and one 5″ dia. upper, two 5″ dia. lower, 7,440 total CFM required.
Electrical	Arranged for 3/60/230 or 460 volt power supply (other electrics available).
Shipping Information	Nominal 13′ by 6′ by 6′ shipping skid, 14,400 lbs, 6,550 kg.

How the 524-DC/SR Edging Rip Saw Works

The 524-DC/SR is a two-arbor machine — it edges on the first arbor and rips on the second, so each board is cleaned and ripped in one pass:

Edge (first arbor). Two shifting hoggers move to each board’s edges and hog off the wany, irregular edge material — turning a rough board into a straight-edged blank, with no separate edging step.
Rip (second arbor). One to four shifting saw blades, with a fixed center blade, gang-rip the edged board into finished-width strips — recovering usable width down to a 1″ minimum net rip between saws.
Feed with glue-joint accuracy. The Posi-Feed high-friction bed and DOUBLE-VEE chains carry each board with positive containment; eight air-loaded press rolls and traveling shoes (one per shifting blade) hold it for a straight, glue-joint-accurate cut.
Power & optimize. A direct-drive 75 HP arbor motor (no belts) drives the cut at 30–235 FPM, and the machine integrates with the Rip Navigator optimizing systems for board scanning and board-by-board yield optimization.

Because it hogs the edges and rips in one machine, this edging gang rip saw removes a whole handling step — and the shifting hoggers and shifting rip blades both adapt to each board for maximum yield.

Applications

The 524-DC/SR Edging Rip Saw fits operations that want to edge and rip rough lumber in one pass:

Edging rough lumber — hog off wany, irregular edges to create straight-edged blanks.
Edge + gang ripping — clean and rip each board into finished strips in a single pass.
Yield recovery — shifting hoggers and shifting rip blades adapt to each board for maximum width recovery.
Rough mill breakdown — high-throughput processing of rough or unedged lumber.
Moulding & dimension stock — random-width and precision components from rough stock.

As a double arbor rip saw, it combines a board edger and a gang rip saw — eliminating a separate edging operation.

Industries Served

The 524-DC/SR supports high-production solid-wood operations across:

Rough Mill — edging and ripping rough lumber into usable stock.
Furniture — dimension components and edge-glued panel stock.
Cabinetry — S4S blanks, face-frame, and door stock.
Mouldings — random-width solid lumber and blanks.
Flooring — solid hardwood strip recovery.
Doors — component and panel stock.
Custom Millwork — flexible, high-yield edging and ripping.

Emerging applications: mass timber and engineered-wood glue-ups, where edging rough stock and recovering maximum width feed large, high-strength panels.

Frequently Asked Questions

What is an edging gang rip saw?

An edging gang rip saw both edges and gang-rips lumber. On the Mereen-Johnson 524-DC/SR, the first arbor’s shifting hoggers hog off the rough edges (edging) and the second arbor’s shifting blades gang-rip the cleaned board into strips — in a single pass.

What makes it a double-arbor rip saw?

It has two arbors: the first carries two shifting hoggers for edging, the second carries one to four shifting rip blades (with a fixed center blade). Edging and ripping happen on separate arbors in the same machine.

What is a “hogger,” and what does it do?

A hogger is a wide cutter that “hogs” off material — here, the two shifting hoggers on the first arbor remove the wany, irregular edges of each board, so the machine works as a board edger before the rip arbor cuts it to width.

How is this different from the 524-DC/SR4?

The 524-DC/SR4 is a single-arbor Select-Rip gang saw. This 524-DC/SR Edging version adds a first arbor with two shifting hoggers, so it edges and rips in one machine — with a heavier feed drive (10 HP), eight press rolls, and higher dust collection.

How does it maximize yield?

Both the shifting hoggers and the shifting rip blades adapt to each board, and the machine integrates with the Rip Navigator optimizing systems for board-by-board scanning and optimization.

What size stock and power?

A 24″ arbor space, stock up to 2-1/2″ thick (with 14″ tooling), a direct-drive 75 HP arbor motor, and feed speeds from 30 to 235 FPM.

Is it made in the USA?

Yes. The 524-DC/SR is designed and built by Mereen-Johnson in the USA.

Automation & Robotics

Tailored Solutions for the Solid Wood Sector

Mereen-Johnson stands at the forefront of delivering cutting-edge automated handling solutions that will streamline your workforce and wood machinery assets. Our smart, automated handling solutions are meticulously crafted to enhance your machine throughput and efficacy while substantially trimming your labor expenses.

Our complete spectrum of services ranges from conceptualization and design of production lines to installation, personnel training and ongoing maintenance, and we cater to a wide array of client requirements, offering both standardized system solutions and fully personalized options to suit your specific needs.

Learn More

The Mereen-Johnson Difference

Made in the USA Quality

Vertically integrated manufacturing in the USA means we control every step of the process to deliver the performance and longevity that the industry has grown to expect from us.

Turnkey Custom Solutions

Listening to your specific needs, we will adapt a standard machine or develop a fully custom solution, including automation and robotics, and manufacture it in-house.

Excellence Under One Roof

Our state-of-the-art production space has room to build, test and prove large-scale design solutions. Design-build teams work together to make your custom concept a reality.

Parts, Service & Training

We will always support your machine. From training programs to replacement parts, schematics to software support, we’ve got you covered, remotely or onsite.

Learn More