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Silver straight die grinder with safety-lock throttle lever and 1/4 inch NPT air inlet

Dynabrade Products

Dynabrade Products 52257 Straight Die Grinder 0.7 hp 18000 RPM 1/4 in NPT

SKU CH-VQ3R-H6JEJ

Straight die grinder delivers 0.7 hp at 18000 RPM with 1/4 in NPT air inlet and includes four collet inserts

  • Main materialHAWA
  • 7 hp motor delivers high torque for heavy-duty grinding
  • 18,000 RPM maximum speed enables fast material removal
  • Safety-lock throttle lever prevents accidental startup
  • Includes four collet inserts for 1/4 in, 3/8 in, 6 mm and 8 mm shanks
  • 1/4 in NPT female air inlet connects to standard shop airlines

Straight Die Grinder 0.7 hp 18000 RPM

The Dynabrade 52257 is a heavy-duty straight die grinder built for metalworking, deburring and finishing tasks. It delivers 0.7 hp at a maximum speed of 18000 RPM. The tool accepts 1/4 in collets as standard and is designed for professional workshops and fabrication shops.

Requires compressed air supply

Operation depends on a compressed air line fitted with a 1/4 in NPT female inlet. The straight body style suits inline access in tight cavities and frees up angular clearance compared with right-angle models. No electrical power or battery is needed for the grinder itself.

Four collet inserts included for multiple shank

The box supplies collet inserts 50013 for 1/4 in, 50014 for 3/8 in, 50016 for 6 mm and 50039 for 8 mm shanks. A safety-lock throttle lever prevents accidental start-up. The kit contains the bare tool only; air hose, lubricator and filter are not included.

How it compares

Measured against everything we stock in Compressors, Inflators & Vacuum Pumps, at today’s prices. Recalculated every night.

Price $507.99
Pricier than about 91% of the 1,520 comparable items (median $36.99).

Specifications

Product
Brand nameDYNABRADE
Size & build
Main materialHAWA

Questions about this item

How long can the 0.7 hp motor run at 18000 RPM before the Safety-Lock throttle lever forces a stop?

The Safety-Lock throttle lever stops the grinder instantly when released, so sustained run time is limited only by your air supply and operator fatigue.

What are the noise and heat levels when the grinder runs all day on compressed air?

The tool exhausts air through the body, so heat stays low; noise is typical for a 0.7 hp straight die grinder at 18000 RPM and is managed with hearing protection.

Which air supply fittings must I already own to connect the 1/4 in NPT female inlet?

You need a 1/4 in NPT male fitting on your hose plus a regulator and lubricator set to deliver clean, oiled air at the required pressure.

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