Radial Arm Saw

Radial Arm Saw at a Glance

A radial arm saw mounts a spinning blade on a horizontal arm that slides toward the operator while the workpiece stays still against a back fence. It was the dominant American shop crosscut tool from the 1940s through the 1970s. The compound miter saw replaced it for most work, and a 3.7-million-unit safety recall in 2001 finished off the consumer market. Today it's a niche tool, still excellent for crosscut dadoes and wide-board work, but a compound miter saw handles most of what it does, more safely and with less maintenance.

In this guide:

• How the arm-and-carriage mechanism works
• Why they disappeared from shops and showrooms
• What it can do that a miter saw cannot
• The specific safety hazards and how to manage them
• RAS vs. compound miter saw, head to head
• Honest verdict on whether to own one

How a Radial Arm Saw Works

Every saw has a motion: who moves, the blade or the workpiece? On a table saw, the workpiece moves into a stationary blade. On a miter saw, the blade pivots down into stationary stock. On a radial arm saw, the blade moves horizontally through stationary stock.

The mechanism is a circular saw blade mounted in a tilting, pivoting yoke (the head). The yoke hangs from a carriage that slides along a horizontal arm (the "radial arm"). The arm itself rotates on a vertical column bolted to a wall or cabinet. The workpiece sits flat on a table, clamped against a back fence. To crosscut, you pull the running saw toward you across the wood.

Three axes of adjustment:

• Arm rotation (left/right on the column) controls miter angle
• Yoke tilt (the head leaning sideways) controls bevel
• Column height sets depth of cut

According to Raymond DeWalt's Wikipedia entry, he designed the original in 1922 while superintending Seabrook Farms in New Jersey, trying to cut more lumber with fewer workers. He applied for US Patent 1,528,536 in 1923, founded DeWALT Products Company in Leola, Pennsylvania in 1924, and called his tool the "Wonder-Worker." His key innovation was driving a saw arbor directly from a motor, not via belt and pulley, suspended in that sliding, tilting yoke.

For a beginner encountering one: think of it as a miter saw that pulls toward you instead of pivoting down, and can accept a dado set.

Why Radial Arm Saws Disappeared

For two decades after World War II, the radial arm saw was the essential American shop tool. GIs had used DeWalt saws building barracks and housing on military bases. When they came home, they bought them. By the 1960s, the RAS was the crosscut standard in US home workshops.

Three things ended that.

The compound miter saw arrived in the 1970s. It did crosscuts and miter cuts, the two operations representing roughly 90% of home shop use, with less setup, less maintenance, less weight, and in less space. Portable enough for job sites. Accurate enough for finish carpentry. Half the price. The RAS's versatility stopped mattering when a cheaper, safer tool handled the core work better.

The recalls finished off the consumer market. In 2001, the CPSC and Emerson Tool Co. recalled approximately 3.7 million Craftsman radial arm saws — every unit Sears sold from 1958 through 1995. The flaw: no blade guard covering the full blade. The CPSC documented about 300 injuries including hand and finger amputations, lacerations, and facial injuries. In 2006, Ryobi recalled 145,000 units for blade detachment — the plastic motor housing cracked, dropping the blade assembly without warning.

The Craftsman recall alone was one of the largest power tool recalls in US history. Fine Homebuilding's account of the RAS decline describes how it hit Sears, the dominant hardware retailer, at the peak of media attention on consumer safety. The tool's reputation never recovered.

The market exited. DeWalt, by then owned by Black & Decker, discontinued consumer models. Craftsman's recall eliminated Sears as a major seller. Only Original Saw Company in Iowa continued manufacturing new industrial units, and still does today, at prices that start above $2,000.

The RAS went from ubiquitous to essentially extinct in consumer retail within about fifteen years.

What a Radial Arm Saw Can Do

The Six Basic Cuts

The RAS makes six cuts: crosscut, bevel crosscut, miter, bevel miter, rip, and bevel rip. Combined bevel-and-miter gives you compound cuts, the same cuts a compound miter saw makes.

Crosscutting is where the RAS excels. When you pull the saw toward you, the blade's rotation pushes the workpiece down and into the fence. The cut is stable. The setup is quick. For repeat cuts to length (say, cutting eight shelf boards to the same size), it's fast and consistent.

The Dado Advantage

The capability that still sets the RAS apart from every miter saw: with a dado set installed, you can cut a dado (a flat-bottomed groove across the grain) in a single crosscut motion. Pull the saw across, step the workpiece over, repeat. No repositioning. No router table setup.

A dado set is a stack of two outer blades and several inner "chipper" blades that together cut a flat-bottomed groove anywhere from 1/4" to 13/16" wide. Miter saws don't accept dado sets; their blade guards and arbors aren't designed for the wider stack.

For building bookcases, cabinets, or any project with dadoed shelves, a radial arm saw set up as a dedicated dado station is faster than a router table for repeat crosscut passes. WoodWeb's guide to cutting dadoes on a radial arm saw recommends multiple light passes of increasing depth rather than one deep hogging cut; this reduces stress on the saw and keeps cuts accurate.

Crosscut Capacity

For wide boards, the RAS's reach beats what most miter saws can handle. A 12" sliding compound miter saw typically crosscuts 14-16". Here's what industrial RAS models offer:

Consumer Craftsman models (10" blade) typically reached 12-13".

Ripping: Possible, Not Recommended

The RAS can be configured to rip lumber by rotating the arm parallel to the fence and feeding the board into the blade. It works, mechanically. But the anti-kickback system is less reliable than a table saw's, and most experienced woodworkers skip ripping on an RAS entirely.

Other Operations

Routing, boring, drum sanding: technically possible with the right accessories, and actual production shops used the RAS this way in the 1950s and 60s. Today, a handheld router, a drill press, and an oscillating sander each do those jobs better, safer, and faster. Not worth considering.

Why the Radial Arm Saw Is Dangerous

The RAS has a safety reputation problem. Most coverage just says "be careful" without explaining what specific risks make it different. Three hazards are unique to the RAS.

Blade Climb on Crosscut

An aggressive blade with a high positive hook angle will pull the carriage through the cut faster than you intend. The teeth grab the wood, and the saw "climbs" toward you. This is how most crosscut accidents on an RAS happen.

The tooth geometry matters: a hook angle is the angle of each tooth face relative to a line drawn through the blade's center. A high positive hook (10-20°, common on ripping blades) creates strong self-feeding force. Useful on a table saw, dangerous on an RAS where the blade is already moving toward the operator. A negative hook angle or 0-5° positive hook generates much less forward pull.

Original Saw Company's safety guidance recommends a negative hook blade for any RAS crosscutting. Never use a ripping blade on a radial arm saw.

Blade Exposure at Rest

A table saw blade sits below the table when not cutting. A miter saw blade sits behind a guard when at rest. The RAS blade hangs at eye level, exposed and spinning, whenever the machine is running with the carriage in the back position.

This was the root cause of the 2001 Craftsman recall. The CPSC's finding was simple: 3.7 million saws sold without a guard that covered the full blade, including the portion exposed at rest. The result was ~300 documented injuries, including amputations.

If you're using or evaluating an RAS, the first check is whether a full blade guard is present and functional. Craftsman models from the recalled production run (1958-1995) are eligible for a guard retrofit. Contact Emerson Tool's safety program to request the kit before operating the saw.

Ripping Hazard

In rip mode, the RAS can launch a board with more force than a typical table saw kickback. The reason comes down to how each saw handles the cut after it goes wrong.

A table saw uses a riving knife (the curved metal piece directly behind the blade) to keep the kerf open as the wood moves through. If the cut wants to close around the blade, the riving knife physically prevents it. Kickback can still happen, but the riving knife is a structural barrier.

The RAS's anti-kickback system uses pawls, small toothed metal crescents that drag on the workpiece. They dig in if the wood moves backward. But they react after kickback starts; they don't keep the kerf open to prevent binding. The board can still close around the blade, contact the top teeth, and get thrown.

The OSHA woodworking guidelines for radial arm saws require anti-kickback pawls to be in place for ripping, along with a spreader to keep the kerf open. Most consumer RAS models don't have a proper spreader. Most experienced woodworkers skip ripping on an RAS entirely and use a table saw instead.

Safe Crosscut Practices

A properly set-up RAS with the right blade is safe to crosscut on. The key principles: use a negative hook or maximum 5° positive hook blade; hold the workpiece against the fence with your left hand at least 6" from the blade path; pull the saw through at a controlled pace without forcing it; stop when the cut completes and don't overtravel; return the carriage to the rear before removing the workpiece; stand to the side, not directly behind the blade.

The saw's rotation pushes the workpiece down and into the fence during crosscutting. With the right blade and proper habits, crosscutting is the safest operation on the machine.

Radial Arm Saw vs. Compound Miter Saw

Portable, accurate, safe, cheap, low maintenance: the compound miter saw wins on every dimension except those three.

Where the RAS still wins:

1. Dado crosscuts. No miter saw does this. If you're building casework with dadoed shelves and want faster repeat passes than a router table setup, a radial arm saw is better.

2. Wide-board crosscutting. Anything over 16" that a sliding compound miter saw can't reach. Wide panels, heavy timbers, long crosscuts in solid wood.

3. Production cut-off stations. Set up once, used all day. A dedicated industrial RAS in a millwork or cabinet shop still earns its place for volume crosscutting.

Outside those three cases, buy the miter saw. See compound miter saw vs. miter saw for help picking the right one.

Is a Radial Arm Saw Worth Having?

The compound miter saw replaced the RAS for 90%+ of typical shop crosscutting and angle work. If you have a miter saw, you don't need an RAS. That's the short answer.

The longer answer depends on which of three situations you're in.

You inherited or found one for free. A quality industrial model (a pre-Black & Decker DeWalt from the 1940s-70s, or a Delta Rockwell turret-arm) is worth keeping if you have the shop space. Set it up as a dedicated dado crosscut station. Use a negative hook blade. Inspect the guard. Don't rip on it.

You're looking at a used Craftsman. Pass unless it's free and already has the guard retrofit. Craftsman models are hard to keep in alignment and represent most of the recall-affected units.

You're choosing between a new RAS and a new miter saw. Buy the miter saw. The only new RAS on the market is the Original Saw Company industrial line, priced over $2,000. A good sliding compound miter saw costs $300-600 and does the core work better.

Evaluating a Used Radial Arm Saw

If you're looking at a used unit:

Seek:

• Pre-Black & Decker DeWalt industrial (1940s-70s): cast iron, excellent alignment retention
• Delta Rockwell turret-arm models: considered among the best; the turret arm is convenient for angle cuts
• Industrial Delta 14"-18" models (still manufactured in the US)

Sawmill Creek's used RAS evaluation thread is the best community resource for specific brand comparisons and condition checks.

Avoid:

• Any saw without a full functional blade guard
• Craftsman/Emerson models unless the guard retrofit has already been installed

Check before buying:

• Arm travel: smooth, no side-play, no binding
• Motor: runs without vibration or grinding
• Guard: fully covers blade including exposed rear position
• Anti-kickback pawls: present, teeth sharp
• Table: flat across its full length

The RAS requires periodic re-alignment: checking that the blade travels parallel to its direction of motion (the "heel"), that the arm is square to the fence, and that the table is flat. Industrial DeWalt and Delta models hold alignment well. Craftsman models drift frequently and take real mechanical skill to keep accurate.

For table saw work including ripping, the table saw is the right tool regardless of what happens with the RAS.

Sources

Research for this guide drew on CPSC recall documentation, OSHA safety guidelines, industry trade publications, manufacturer specifications, and woodworking community discussions.

• CPSC — Craftsman Radial Arm Saw Recall (2001) — 3.7M units recalled; ~300 injuries documented
• CPSC — Ryobi Radial Arm Saw Recall (2006) — 145,000 units; blade detachment hazard
• Wikipedia — Raymond DeWalt — inventor history, 1922 origin, patent record
• Fine Homebuilding — Whatever Happened to the Radial-Arm Saw? — decline narrative and market history
• WoodWeb — Using a Radial-Arm Saw to Cut Dadoes — dado technique and depth-of-pass recommendations
• Original Saw Company — Safety Tips for Radial Arm Saws — blade hook angle recommendations from an active RAS manufacturer
• OSHA — Woodworking Radial Arm Saws — occupational safety standards; anti-kickback and spreader requirements
• Sawmill Creek — Identifying a Good Used RAS — brand comparisons and condition checklist from experienced woodworkers