Dynabrade Products
Dynabrade Products 51302 Straight Die Grinder 0.5 hp 20000 RPM 1/4 in NPT Female
Straight die grinder delivers 0.5 hp at 20,000 RPM with 1/4 in NPT female inlet and includes four collet inserts
- Heavy-duty grinding power from 0.5 hp motor
- Precise finishing at 20000 RPM max speed
- Versatile bit changes with four included collet inserts
- Secure airflow via 1/4 in NPT female inlet
- Safer operation using safety-lock throttle lever
Straight die grinder for heavy-duty use
This pneumatic straight die grinder delivers 0.5 hp at 20,000 RPM for material removal, deburring and finishing tasks. It accepts 1/4 in, 3/8 in, 6 mm and 8 mm collets so operators can switch between imperial and metric accessories without buying separate tools. The safety-lock throttle lever prevents accidental start-up during bit changes or repositioning.
Air consumption and operating noise
The tool connects through a 1/4 in NPT female inlet and runs on standard shop compressed-air supply. At full speed the motor produces typical pneumatic-tool sound levels and draws the air volume expected for a half-horsepower grinder. No electric motor or battery is present, so heat build-up in the housing remains low during extended runs.
Four collet inserts included
The package supplies collet inserts numbered 50013, 50014, 50016 and 50039, covering the four supported shank diameters. Swapping inserts takes only a wrench, letting the operator match the collet to the accessory in seconds. No carrying case, lubricant or additional fittings are bundled, so users supply their own air hose, coupler and inline oiler if required.
Highlights
- Heavy-duty grinding power from 0.5 hp motor
- Precise finishing at 20000 RPM max speed
- Versatile bit changes with four included collet inserts
- Secure airflow via 1/4 in NPT female inlet
- Safer operation using safety-lock throttle lever
Specifications
| Brand | DYNABRADE |
|---|
Questions about this item
How do I connect the 1/4 in NPT Female air inlet and which step do people miss?
Thread the air hose onto the 1/4 in NPT Female inlet using thread sealant, then attach the required 1/4 in collet insert Mfr. No. 50013 before use; the step often missed is installing the collet insert first.
What maintenance or replacement will the Dynabrade 51302 need over time?
Replace the collet inserts — 1/4 in Mfr. No. 50013, 3/8 in Mfr. No. 50014, 6 mm Mfr. No. 50016, 8 mm Mfr. No. 50039 — when they wear, and lubricate the air motor regularly.
At 20,000 RPM what limit appears first during sustained grinding?
The 0.5 hp air motor reaches its power ceiling first, so sustained material removal drops once the load exceeds the available horsepower.
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