Air Grinder / Saw

An air grinder or saw uses compressed air to drive an abrasive wheel, burr or blade for cutting, grinding and deburring metal and other hard materials. Air drive keeps the tools compact, tolerant of continuous duty and free of electrical hazard around metal and moisture. Listed models operate at 90 psi and weigh 5.0-28.0 lb, spanning light die grinders to heavy cut-off and reciprocating saws.

Modèles

90 psi across listed models

Operating pressure

Marques

Fonctionnement

Compressed air spins a vane motor inside the tool body; the motor turns the spindle carrying the abrasive wheel, burr or saw blade, or drives a reciprocating blade on air saws. A trigger or lever valve meters air to the motor, and speed is governed by the motor design and supply pressure — listed tools are rated at 90 psi. Performance depends on the supply as much as the tool: an undersized compressor or narrow hose starves the motor, and speed and torque collapse under load. Air consumption listings across this class span a wide range, so the compressor's sustained delivery is checked against the specific tool's rated draw before the tool is put to work.

Types et variantes

Die grinders: Light, high-speed tools driving small burrs and points for deburring, porting and detail metal removal.
Angle grinders: Abrasive-wheel tools for weld dressing, grinding and cutting; the general-purpose middle of the class.
Cut-off saws: Abrasive cut-off tools for rebar, bolts, stock and fasteners where a straight, fast cut is the job.
Reciprocating and body saws: Blade-type air saws for sheet, tube and panel cutting where an abrasive wheel is the wrong profile.

Spécifications clés

Spécification	Plage typique	Signification
Operating pressure	90 psi across listed models	The rated supply pressure at which published speed and power figures hold; low supply pressure degrades both.
Tool weight	5.0-28.0 lb across listed models	Light tools reduce fatigue on overhead and extended work; heavier tools add stability on sustained cuts.
Motor power	0.7-6.5 hp as listed across models	Sets how much material the tool removes under load — the low end suits deburring, the top end heavy cutting.

Comment l'industrie le dimensionne

Air grinders and saws are matched on three axes: the wheel or blade the job needs, the tool weight the operator can sustain — 5.0-28.0 lb across listed models — and the air supply available, since the compressor must hold the tool's rated draw at 90 psi continuously. Motor power, 0.7-6.5 hp on listed units, follows the duty: detail deburring at the low end, sustained heavy cutting at the top.

Applications

Cutting rebar and steel stock on site
Dressing and blending welds on fabricated parts
Deburring cut edges and castings
Cutting bolts and fasteners to length
Surface preparation ahead of coating or painting
General metal fabrication and repair

Sécurité et opération

Abrasive wheels are rated for a maximum speed that must meet or exceed the tool's spindle speed; an over-sped wheel can burst.
Wheel and blade guards stay fitted and positioned; grinders without guards are the classic source of severe hand injuries.
Cutting and grinding throw hot sparks — flammables are cleared and hot-work controls applied where required.
Air lines are depressurized before wheels or blades are changed, and hose couplings carry whip restraints.
Sustained grinding is high-noise, high-vibration work; hearing protection and vibration exposure management apply.

Normes et certifications

OSHA · 29 CFR 1926.303: Abrasive wheel and tool requirements for construction, including guarding and wheel inspection.
OSHA · 29 CFR 1926.302(b): Pneumatic tool and hose security requirements.
ANSI · ANSI B7.1: Safety requirements for the use, care and protection of abrasive wheels — the wheel-speed and mounting reference.
ANSI · ANSI B186.1: Safety code for portable air tools.

Questions fréquentes

How is an air grinder matched to a compressor?

By sustained delivery: the compressor must hold the tool's rated air draw at the listed 90 psi operating pressure continuously, or speed and torque collapse under load.

What is the difference between an air grinder and an air saw?

Grinders remove material with rotating abrasive wheels or burrs — dressing welds, deburring, surface prep. Saws make straight cuts with abrasive cut-off wheels or reciprocating blades.

How heavy are these tools?

Listed models run 5.0-28.0 lb. The light end suits overhead and extended detail work; the heavy end adds stability for sustained cutting.

Why do abrasive wheel ratings matter?

Every wheel carries a maximum rated speed. Mounting a wheel rated below the tool's spindle speed risks a wheel burst, which is why ANSI B7.1 and OSHA 1926.303 govern wheel selection and mounting.