Radial-Arm Saw

identity

• name: radial-arm saw (RAS); OSHA and Original Saw also use radial saw. Wonder-Worker was DeWalt's trade name, not a generic alternate name [R3].
• family / category: stationary powered woodworking machine — an overhead circular-saw carriage on a horizontal arm above a fixed table [R1][OS1].
• one-line (review fix 4 — mode-aware): an overhead circular-saw carriage that travels along a radial arm for crosscuts and can, on models equipped for it, be locked in a rotated position while stock is fed for ripping.
  • crosscut mode: the head moves; the stock stays against the fence.
  • rip mode (approved, equipped models only): the head is locked parallel to the fence; the stock moves.

✦ How NOT to use it

dangerous — rebuilt from current controls (review fixes 1, 5, 7, 8, 10)

The central hazard — self-feed / climb. In a crosscut the blade's rotation tends to pull the carriage toward the operator; a positive-hook or dull blade, or a forced cut, can make the head grab the stock and run forward [R1][R14]. CPSC's investigation describes operators pulling the arm onto stock too fast so it bounced back into the hand [R10].

Do not transfer feed habits to a sliding miter saw (holding finding). Both machines can climb if fed in the wrong direction. Follow the exact model manual: many sliding miter saws require an out-down-back push cut — pull the head out without cutting, lower it, push it back through the work — and DeWalt's DWS780 manual warns that cutting on the pull stroke can make the blade climb and violently throw the blade assembly toward the operator; Makita's LS1013F manual gives the same push sequence and warns of serious injury [DW780][MK1013]. A radial-arm saw crosscut is normally a controlled pull cut. The two are not opposite-and-safe geometries.

Controls (current hierarchy, per the reviewer's safety notes):

• Recall check first. Clear the exact model and serial number against CPSC recalls before acquiring, restoring, selling or operating any vintage unit. Craftsman radial-arm saws (CPSC 01-031: ~3.7 million units, ~300 injury reports including amputations) — the remedy changed on 23 July 2019 and the current CPSC record identifies a $100 refund for return of the carriage [CPSC-C]. Ryobi RA200 and RA202 (CPSC 06-212, blade-assembly detachment) — stop using; no repair is available [CPSC-R].
• Complete, functioning, model-approved machine: guard, travel stop, return system, fence, locks, blade and operation-specific accessories all present and working [OSHA-R][OS1].
• Secure and support the stock; keep carriage travel within the table [OSHA-E][OS2].
• Hands, clothing, jewelry and bystanders out of the blade path and the return path; never reach across the running blade [OSHA-E][R10].
• Wait for full blade stop before moving material or measuring.
• Disconnect and lock out power for adjustment, alignment, blade or accessory changes, and service [OS3].
• Inspect stock for defects and foreign material.
• Eye/face and hearing protection; control wood dust [OSHA-E].
• Correctly sized, rated, model-approved blades and accessories only [OS4][OS1].
• Ripping: rip only if the model manual permits it and all required model-specific guarding, fence, spreader, anti-kickback equipment and feed controls are installed and adjusted. In covered US workplaces, 29 CFR 1910.213(h) applies: non-kickback fingers or dogs on both sides for ripping, and the "Danger: Do Not Rip or Plough From This End" marking with feed against the blade's rotation; OSHA's eTool separately recommends a spreader; Original Saw requires its optional Rip Kit on applicable models [OSHA-R][OSHA-E][OS1]. OSHA requirements govern covered workplaces and are strong control evidence, but they do not replace the manufacturer manual or current recall instructions.
• Gentle return: confirm the head returns to the rear without rebound — by installation geometry or an effective automatic-return device [OSHA-R][OSHA-I].

Injury data, read with its own caveat: CPSC's stationary-saw report estimates about 2,300 radial-arm-saw injuries in 2001 (~4% of stationary-saw injuries) and explicitly warns the estimate rests on a small sample with large variability; it is not a per-unit risk ranking [R10]. Named forum injuries (see human side) are human evidence, not epidemiology.

damaging

• chronic alignment burden — many moving and sliding parts; Greg Sznajdruk: keeping alignment is "a ROYAL PITA" [R16]; follow the manual's alignment checks rather than forum technique [OS3].
• loose carriage — where accuracy loss and hazard converge [R11].
• wrong blade — Peter Leyden: some consumer saws shipped with a large positive-rake blade that "wanted to climb right over the wood" [R17]; use the model-appropriate blade [OS4].

beginner-trap

• pulling the carriage too fast [R10][OS2];
• running the factory-supplied blade without checking its hook [R17];
• missing or unverified anti-kickback devices — CPSC case data often record "no information" or removal [R10];
• any miter, bevel, swivel or carriage lock left loose [R17].

lineage-misuse

• sliding miter saw habits — see the holding finding above: do not carry a pull-cut habit to a sliding miter saw, or assume either machine's feed geometry is inherently safe.
• table-saw feed logic — a table saw feeds stock into a fixed blade from the front; a RAS crosscut pulls the blade through still stock, and a RAS rip feeds stock against the blade's rotation from the marked end. Hennessy's rule — "Cross cuts and dadoes on the RAS, and rips on the TS" — keeps the logics separate [R11][OSHA-R].
• expecting sheet-goods capacity — bounded by arm travel [R23].

correct use

Short — the workbench holds operation; the exact model manual governs.

• good at: repeat crosscuts of supported stock to a stop block; wide stock that is awkward to crosscut on a table saw; miters and bevels; dadoes where the model manual approves the dado set and guard [R1][OS1][R25].
• crosscut practice: carriage and locks adjusted per the manual [OS3]; a suitable low- or negative-hook blade for the model [OS4][R1]; hold the yoke handle and pull the carriage at a controlled rate — never let it self-feed; adjusted travel stop; return the head to the rear rest under control [OS2].
• ripping: see matching and dangerous — model-approved, fully equipped, trained operation only.

✦ matching — the workbench's first read (the reviewer schema notes)

• general match: repetitive crosscutting and mitering of supported stock; batch length cuts with a stop block; wide boards [R1][OSHA-E].
• conditional match — only on models and accessories approved for them: dadoes, bevels, compound cuts, non-wood materials, and ripping [OS1][OMGA].
• specialist / legacy route: vintage restoration, only after model and serial recall clearance and verification of the safety systems (see access).
• pairs with: a table saw or purpose-built rip saw for routine ripping [R1][R19]; a dado set where approved [OS1].
• substitutes, not descendants: sliding miter saw for much crosscut/miter work; track saw for sheet breakdown; table or rip saw for routine ripping [R1][R11][R23].
• cannot replace: a track saw or panel saw for full-sheet breakdown — crosscut width is bounded by arm travel [R23].
• ripping (review fix 6): IF the user is a general or vintage-machine owner, THEN route ordinary ripping to a table saw or purpose-built rip saw — practitioner and trade-press sources strongly prefer this (Rod Sheridan: "ripping, an absolute no no in my book"; Tim Inman: "there is NO safe hook angle for ripping on a radial arm saw") [R17][R15]. EXCEPTION: current industrial machines designed and equipped for ripping (Original Saw with its Rip Kit; OMGA models with published rip capacities) may rip as a model-approved, fully equipped, trained operation [OS1][OMGA]. The forum view is a preference, not a universal exclusion.
• accessory heads (review fix 9): use dado, molding, sanding, boring or other heads only when the exact machine manual approves the accessory, arbor, speed, guard and operating method. OSHA requires guarding for each tool used on a combination machine [OSHA-R]. Historical advertising is not permission to mount an accessory on an arbitrary vintage saw.
• access (mandate rule — no beginner verdict): use requires instruction in the model's adjustments and locks, blade selection, controlled carriage travel, guard/return/travel-stop checks, workholding, hand position relative to the blade and return paths, lockout, and — for any rip — the model's approved setup and feed direction. A beginner's Sawmill Creek thread records the community steering toward a sliding miter saw plus table saw instead [R19].
• revival (review fix 15): vintage cast-iron units have a real following and a dado-station niche [R19][R20]. Any acquisition or restoration is conditional on: CPSC recall clearance by model and serial; complete guards and a working return system; the correct manual; locks and electrical components serviceable; parts support; and competent inspection. (Old forum price figures removed.)

anatomy (review fix 3 — adjustments separated; details and locks are model-specific)

• column and arm — the arm swings horizontally on the column to set miter angle; arm elevation sets depth [OS1][OS3].
• carriage — travels along the arm on bearings; carriage travel is the crosscut stroke. Carriage looseness degrades accuracy and safety [R11][R17].
• yoke — carries the motor; swivels the motor/blade into rip position (parallel to the fence) on models equipped for ripping [OS1].
• motor tilt — the motor tilts in the yoke for bevel [OS1].
• locks — miter, carriage, yoke-swivel and bevel each have their own lock; leaving any loose causes binding [R17][OS3].
• guarding — upper guard enclosing the blade to the arbor, lower guarding, and, for ripping, non-kickback fingers or dogs [OSHA-R][OSHA-E].
• travel stop — limits forward travel so the blade stays within the table [OSHA-R][OS2].
• return (review fix 8): in covered workplaces the cutting head must return gently to its starting position without rebound. This may be achieved by installation geometry (front slightly high, rear low) or by an effective automatic-return device, per OSHA's 1991 interpretation and the machine manual [OSHA-R][OSHA-I].
• table and fence — work surface and reference; stop blocks for repeat cuts [OSHA-E].
• blade — diameter, bore, kerf, tooth count, hook, material and rated speed are model-specific; Original Saw sells a −2° hook general-purpose blade for controlled cutting on compatible saws [OS4].

variations (living) — dated (review fix 13)

• DeWalt-era cast-iron machines (1920s–1960s) — sought by restorers [R11][R19][R20].
• Craftsman consumer line (1958–1992/95) — subject of CPSC recall 01-031 (see dangerous) [R8].
• Ryobi RA200 / RA202 — subject of CPSC recall 06-212, stop use; no repair available [CPSC-R].
• current confirmed manufacturers (observed 2026-07-30; availability and prices change): Original Saw (Britt, Iowa — active US manufacture; 12″ models starting over $6,100; 14″ heavy-duty model with optional Rip Kit on applicable models and model-approved dado use) [OS1]; OMGA (Italy — current industrial lines with published rip capacities) [OMGA]; Maggi (Italy — current crosscut-focused line) [MAGGI]. These are confirmed makers, not an exhaustive worldwide count. (The 2019 "sole US maker," "only other manufacturers," "$4,800" and "sales in the hundreds" claims are removed.)

trades

• home workshop / hobbyist woodworking [R11];
• framing and general construction crosscutting, largely taken over by sliding miter saws [R1][R11];
• cabinet and furniture shops — dadoing and batch crosscutting [R19][R25];
• industrial crosscut stations — current Original Saw, OMGA and Maggi lines [OS1][OMGA][MAGGI];
• vintage-machine restoration [R20][R21].

lineage

• earlier belt-driven arm saws: VintageMachinery.org's manufacturer history reports similar arm-and-carriage machines built earlier by two Toronto makers (Elliot Woodworker Ltd.; Mackintosh Hutchinson), driven by belt from a separate motor [R4]. DeWalt's documented contribution is the commercially successful direct-drive machine with the motor carried on the arm. "DeWalt invented the radial-arm saw" is therefore best read as a branded, direct-drive origin, not the invention of every arm-saw element. (Machinery-history archive — MEDIUM.)
• contemporary / functional comparator: the table saw — the usual shop partner and rival; it rips by feeding stock past a fixed blade [R1].
• later substitutes, not descendants (review fix 11): the sliding (compound) miter saw took over much crosscut and miter work from the late 1970s [R1] — a substitute, with its own feed rules (see how NOT to use it); the track saw is a substitute for sheet-goods breakdown, a different workflow [R11]. No sourced design lineage connects either to the RAS, so neither is called a descendant.
• DeWalt panel saws — DeWalt later built arm-saw-based panel saws and in 1960 acquired the Bennett two-way panel saw design [R4]. Not built as its own entry.

history

• inventor and patents (review fix 2): Raymond E. DeWalt filed the tool-holder application on 27 September 1921 (US 1,528,535) — its text describes the post, horizontal arm, traveling carriage, adjustable tool-carrying motor, and vertical/horizontal adjustments — and filed the more specific woodworking-machinery application on 27 January 1923 (US 1,528,536). Both issued 3 March 1925 [P535][P536]. US 1,528,535 is directly related to the later patent, not an unrelated invention. (Primary — HIGH.) A "1922" date that circulates in secondary sources is best read as when the machine was being built and proved, not a patent date [R5].
• founding purpose (review fix 14): US 1,528,536 states the demand "for a machine of a universal character that can be quickly adjusted to perform a great many different operations ordinarily performed on as many different machines" [P536]; DeWalt's corporate history frames it as a productivity machine [R3]. Attributed secondary history: a blog account says DeWalt was a mill superintendent whose machine let "one man do the work of four" [R5] — kept as attributed narration, not the documented founding failure. The picture-frame "original purpose" claim is removed.
• company chain: DeWalt sold the company and patents on 29 December 1924 to Paul Gardner and Isaac Rutt (DeWalt Products Co., Leola, PA) [R3]; Lancaster, PA from about 1929; AMF 1949; Black & Decker 1960; industrial radial-saw line sold in 1989 to former DeWalt executives (Lancaster Machinery Co.); rights later to The Original Saw Company, Britt, Iowa [R4][R12].
• wartime and postwar (secondary weight): VintageMachinery.org describes DeWalt saws as widely used on military bases in WWII; DeWalt's own page confirms only a wartime expansion for defense orders, so the "standard issue" and Pacific-theater detail stays at secondary-source weight [R4][R3]. Postwar home-shop machines followed; VintageMachinery.org notes some period methods were "startlingly unsafe" by modern standards [R4].
• Craftsman era: Sears Craftsman radial-arm saws made by Emerson Electric, sold 1958–1992 (8″ to 1995) [R8].
• decline (review fix 12): later consumer machines are frequently criticized in secondary and practitioner sources for alignment and tuning issues [R1][R11][R16], while sliding miter saws displaced much crosscut and miter work [R1]. The relative contribution of build quality, price, competition, litigation and reputation is unresolved; no claim is made about a market-wide causal chain or a safety-margin effect.
• (Removed per the reviewer's factual notes: the single-sourced "religious communal order" biographical aside.)

✦ human side

• owners who value it: Mike Hennessy (Fine Homebuilding thread): "My RAS was my first stationary power tool. It still has an honored spot in my workshop" [R11]. Retired shop teacher Bill Geibe (Sawmill Creek) thinks the danger is "over-rated" with a negative-hook blade and recalls one serious injury in 36 years [R18].
• injuries, plainly told (practitioner evidence, not an epidemiological ranking): Jerry Nazard — thumb broken and run through by a splinter in a RAS kickback, his first power-tool accident in 45 years [R16]; Joe Maday's father — four fingers lost as a teenager when the saw "kicked out" on a machine whose return weight had been removed [R18]; Matt Marsh's two shop-teacher colleagues — fingertips lost to a dado blade riding up, and a splinter through the cheek into an eye [R18].
• restoration community: OWWM.org and LumberJocks carry dated DeWalt and Craftsman restoration threads [R20][R21]; VintageMachinery.org's DeWalt archive is extensive [R4].
• family memory: a Fine Homebuilding writer's stepfather's saw "parked in front of the piles of building lumber" [R11].

✦ proof of existence

• US 1,528,535, Tool holder — R. E. DeWalt, filed 27 Sept 1921, issued 3 March 1925 [P535].
• US 1,528,536, Woodworking Machinery — R. E. DeWalt, filed 27 Jan 1923, issued 3 March 1925 [P536].
• DeWalt corporate archive — 1924 "Wonder-Worker" advertisement and later period material [R3].
• Henry Ford Museum holdings (per VintageMachinery.org) — 1944 DeWalt tools-and-attachments catalog; 1951 Model R-2 catalog [R4].
• CPSC recalls 01-031 (Craftsman) and 06-212 (Ryobi RA200/RA202) — dated government records of mass-market scale [CPSC-C][CPSC-R].
• current production — Original Saw, OMGA, Maggi product pages, observed 2026-07-30 [OS1][OMGA][MAGGI].
• Unconfirmed leads, not carried as fact: a Smithsonian NMAH collections record; forward citations of US 1,528,536 (relayed, not re-verified).

references

The reviewer's corrections (15)

• BLOCKER — Exact claim: “an SCMS blade plunges into the work and pushes against the blade's rotation, so a jam ten …
• SHOULD-FIX — Exact claim: DeWalt's September 27, 1921 filing was “an unrelated invention,” while US 1,528,535 is lat …
• SHOULD-FIX — Exact claim: “The yoke ... pivots to set miter angle ... and tilts to set bevel angle.”
• SHOULD-FIX — Exact claim: “A stationary circular saw whose blade travels through stationary stock” as the family-wid …
• SHOULD-FIX — Exact claim: “For any ripping operation at all: install the anti-kickback fingers/dogs and spreader as …
• SHOULD-FIX — Exact claim: Ripping is an “absolute no no,” the tool “cannot reliably replace a table saw for safe, ac …
• SHOULD-FIX — Exact claim: The 2000 recall offered “a free full-guard retrofit kit or a $100 buy-back.”
• SHOULD-FIX — Exact claim: “return-tilt mounting — OSHA-mandated” as though every compliant machine must be physicall …
• SHOULD-FIX — Exact claim: Accessory heads can make the saw “a horizontal borer, drum/disc sander, or router table,” …
• SHOULD-FIX — Exact claim: The safety layer centers on carriage adjustment, blade hook, and injury anecdotes.
• SHOULD-FIX — Exact claim: “The SCMS — the RAS's direct powered descendant,” “The track saw ... the direct modern des …
• SHOULD-FIX — Exact claim: The postwar decline was “a rare case” caused by reputation and stamped-sheet-metal cost-cu …
• SHOULD-FIX — Exact claim: “sole current U.S. manufacturer,” “the only other current manufacturers,” “base models sta …
• MINOR — Exact claim: The tool was engineered for picture-frame/door-frame work as its “original invented purpos …
• MINOR — Exact claim: Vintage machines are “commonly $50–$200” and cast-iron examples are broadly “excellent val …