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Dynabrade 48325 straight die grinder composite body safety-lock throttle 1/4 inch NPT air inlet

Dynabrade Products

Dynabrade Products 48325 Straight Die Grinder 0.4 hp 25000 RPM 1/4 in NPT

SKU CH-0GN2-CV3B1 MPN 48325

Straight die grinder delivers 0.4 hp at 25000 RPM with 1/4 in NPT air inlet and safety-lock throttle

  • Product typeGrinders
  • Main materialComposite
  • 4 hp motor delivers 25000 RPM for fast material removal
  • Safety-lock throttle lever prevents accidental start-up for operator protection
  • Composite housing reduces vibration and operator fatigue during extended use
  • Includes 1/4 in and 6 mm collet inserts for versatile bit compatibility
  • 1/4 in NPT female air inlet fits standard shop air lines

Tool Identity

The Dynabrade 48325 is a straight die grinder built for heavy-duty material removal. It runs on compressed air through a 1/4 in NPT female inlet and delivers 0.4 hp at a maximum speed of 25000 RPM. The composite body keeps the tool light while resisting shop chemicals and impact. A safety-lock throttle lever prevents accidental start-up.

User Fit

Technicians shaping carbon fibre, composites, fibreglass or metal will value the high speed and the included 1/4 in and 6 mm collet inserts. Buyers without a regulated air supply or those needing an electric or cordless solution should look at a different power source. The bare-tool kit assumes you already own compatible fittings and hose.

Deciding Spec

The 1/4 in NPT female air inlet fixes the connection standard for your airline. If your workshop uses a different thread size or quick-coupler profile, you must add an adapter before the grinder can be used.

How it compares

Measured against everything we stock in Sanders, Rotary & Demolition Tools, at today’s prices. Recalculated every night.

Price $332.99
Pricier than about 92% of the 477 comparable items (median $21.99).

Specifications

Product
Brand nameDynabrade
Model name48325
Product typeGrinders
Size & build
Main materialComposite

Questions about this item

How do I connect the 1/4 in NPT female air inlet on the 48325, and what step is often missed?

Screw a 1/4 in NPT male fitting into the inlet, then tighten with a wrench on the tool’s flats — do not overtighten the composite housing. The step often missed is applying thread sealant rated for compressed air before assembly.

Which wearable parts on the 48325 will need replacement during its service life?

The 1/4 in collet insert (Mfr. No. 01485) and 6 mm collet insert (Mfr. No. 01497) wear from repeated bit changes; the safety-lock throttle lever and internal vanes also require periodic inspection and replacement.

At 25,000 RPM what is the first limit that appears during extended grinding sessions?

Continuous operation at maximum speed generates heat in the composite housing and increases air consumption; the tool’s 0.4 hp motor will stall if the air supply pressure drops below the required level.

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