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Silver straight pneumatic die grinder with safety-lock throttle lever and collet inserts included

DYNABRADE

DYNABRADE 52663 Straight Die Grinder 1 hp 12000 RPM 1/4 in NPT

SKU CH-YYPY-MK2VT

A 1 hp straight die grinder running at 12,000 RPM with a 1/4 in NPT female air inlet and four included collet inserts for versatile material removal

  • Heavy-duty performance with 1 hp motor delivering 12,000 RPM
  • Versatile collet kit includes 1/4 in, 3/8 in, 6 mm and 8 mm inserts
  • Safety-lock throttle lever prevents accidental start-up
  • Straight orientation suits precision grinding in tight spaces
  • 1/4 in NPT female air inlet for standard pneumatic connection

Heavy-duty straight die grinder

The DYNABRADE 52663 is a pneumatic straight die grinder rated at 1 hp with a maximum speed of 12,000 RPM. It is built for heavy-duty material removal, deburring and finishing tasks in professional workshops. The tool accepts 1/4 in, 3/8 in, 6 mm and 8 mm collet inserts for versatile accessory compatibility. A safety-lock throttle lever helps prevent accidental start-up during handling.

1/4 in NPT air inlet and collet kit

The grinder connects via a 1/4 in NPT female air inlet, fitting standard industrial air lines without adapters. The package includes four collet inserts — manufacturer numbers 50013, 50014, 50016 and 50039 — covering the common shaft sizes used in metalworking. This bare-tool configuration lets operators swap accessories quickly while keeping the same drive motor. Straight orientation suits tight access and inline grinding work.

Air consumption and operational noise

As a 1 hp pneumatic tool running at 12,000 RPM, it draws a substantial volume of compressed air during continuous use; a properly sized compressor and clean, lubricated supply are required to maintain speed. Exhaust air and gear noise are typical for high-speed straight grinders, so hearing protection is advisable for extended sessions. The safety-lock throttle allows the operator to shut off airflow instantly when the tool is set down.

How it compares

Measured against everything we stock in Air & Hydraulic Power Tools, at today’s prices. Recalculated every night.

Price $625.99
Pricier than about 90% of the 243 comparable items (median $61.99).

Specifications

Product
Brand nameDYNABRADE

Questions about this item

What does the 1/4 in NPT female air inlet mean for airflow and connection?

The 1/4 in NPT female inlet accepts standard 1/4 in NPT male fittings, delivering compressed air directly to the 1 hp motor at up to 12,000 RPM.

What clearance and mounting does the straight body need?

The straight, bare-tool design fits tight workspaces and requires only a 1/4 in NPT air line; no bracket or flange mounting is included.

How is the Safety-Lock throttle lever engaged during start-up?

Depress the safety lock on the throttle lever before squeezing the trigger; releasing the lock prevents accidental starts.

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