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Straight die grinder, aluminium body, safety-lock throttle lever, 1/4 in NPT female air inlet

Dynabrade Products

Dynabrade Products 53502 Straight Die Grinder 0.5 hp 20,000 RPM 1/4 in NPT

SKU CH-9RP4-CYT5W

A heavy-duty straight die grinder with a 0.5 hp motor reaching 20,000 RPM and a safety-lock throttle lever

  • Main materialHAWA
  • 5 hp motor delivers strong material removal
  • 20,000 RPM maximum speed enables fast finishing
  • 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 body design suits tight-access grinding tasks

Straight Die Grinder 0.5 hp

The Dynabrade 53502 is a straight die grinder rated at 0.5 hp with a maximum speed of 20,000 RPM. It accepts 1/4 in and 6 mm collets and includes additional 3/8 in and 8 mm inserts. A safety-lock throttle lever helps prevent accidental starts.

Air supply and collet flexibility

The tool connects through a 1/4 in NPT female air inlet and requires a compressed-air source capable of delivering the rated flow. Four collet inserts are supplied so the operator can switch between common shank sizes without extra purchases.

Sustained heavy-duty operation

Built for heavy-duty use, the grinder maintains its 20,000 RPM rating during extended material-removal tasks. The safety-lock throttle remains engaged only while deliberately held, reducing operator fatigue during long sessions.

How it compares

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

Price $553.99
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 0.5 hp motor run at 20,000 RPM before heat becomes the limiting factor?

The 0.5 hp air motor is designed for continuous heavy-duty operation; sustained speed is limited by the supply of clean, lubricated compressed air rather than internal thermal protection.

What sound level and air consumption should I expect when the grinder runs all day at 20,000 RPM?

Expect typical die-grinder noise and a steady draw of compressed air through the 1/4 in NPT inlet; the safety-lock throttle lever lets you stop flow instantly during pauses.

Which collet inserts come in the box so I can start work without buying extra accessories?

The kit includes 1/4 in (Mfr. No. 50013), 3/8 in (50014), 6 mm (50016) and 8 mm (50039) collet inserts for the straight grinder.

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