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Dynabrade Products

Dynabrade Products 52679 Straight Die Grinder 1/4 in NPT Female Air Inlet 1 hp 20000 RPM

SKU CH-JW3S-QJ27P

Straight die grinder delivering 1 hp at 20,000 RPM with 1/4 in NPT female air inlet and multiple collet inserts included

  • MaterialHAWA
  • 1 hp motor delivers high torque for heavy-duty grinding
  • 20000 RPM maximum speed enables fast material removal
  • Safety-lock throttle lever prevents accidental start-up
  • Four collet inserts included for 1/4 in, 3/8 in, 6 mm and 8 mm shanks
  • Straight orientation with 1/4 in NPT female air inlet for direct line connection

Straight die grinder for heavy-duty use

This straight die grinder is built for heavy-duty material removal in metal fabrication and maintenance workshops. A one-horsepower motor drives the spindle to a maximum speed of 20,000 RPM for fast stock removal. The safety-lock throttle lever prevents accidental start-up during tool changes. It suits professionals who need reliable pneumatic performance.

Quarter-inch NPT female inlet and collet flexibility

The tool connects to shop air through a quarter-inch NPT female inlet, a common fitting in industrial supply lines. Four collet inserts are included: quarter-inch, three-eighths-inch, six-millimetre and eight-millimetre sizes. This range lets operators switch between imperial and metric accessories without sourcing separate collets. The straight body layout provides direct alignment for precision grinding and deburring tasks.

Bare tool kit with four collet inserts

The package delivers the bare grinder plus collet inserts numbered 50013, 50014, 50016 and 50039, so users can mount popular carbide burrs and mounted points immediately. No lubricant, hose or additional safety gear is supplied, so buyers must provide their own air-line oil and personal protection. Workshops needing a complete air-system starter kit will need to purchase those items separately.

Highlights

  • 1 hp motor delivers high torque for heavy-duty grinding
  • 20000 RPM maximum speed enables fast material removal
  • Safety-lock throttle lever prevents accidental start-up
  • Four collet inserts included for 1/4 in, 3/8 in, 6 mm and 8 mm shanks
  • Straight orientation with 1/4 in NPT female air inlet for direct line connection

Specifications

BrandDYNABRADE
MaterialHAWA

Questions about this item

What does the 1/4 in NPT female air inlet limit in practice?

The 1/4 in NPT female air inlet requires a matching male NPT fitting and restricts airflow to what a 1/4 in port can deliver, which affects maximum tool speed under load.

What physical space and connections are needed to mount the 52679 straight die grinder?

The straight body needs clearance for its length and a 1/4 in NPT female air inlet connection; the included collet inserts 50013, 50014, 50016 and 50039 accommodate 1/4 in, 3/8 in, 6 mm and 8 mm shanks.

How is the 52679 installed and which step is often missed?

Connect a compatible 1/4 in NPT male air hose, select the correct collet insert for the accessory shank, tighten the collet securely, then engage the safety-lock throttle lever before use.

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