DYNABRADE Cone Or Plug 6" (152 mm) Extension Wheel Grinder - 52722
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1 hp, Straight-Line, 20,000 RPM, Rear Exhaust, 3/8"-24 Spindle Thread.
- Cone or Plug Wheel Grinder, for cleaning metal, grinding and smoothing weld seams, removing imperfections before painting.
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Straight Line, 1 hp, Rear Exhaust, 6" Extension, 20,000 RPM.
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Accepts optional Abrasive Cone or Plug Wheel, 1-1/4" diameter. Governor-controlled motor maintains RPM under heavy load.
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Safety-lock lever is included on all models. Standard cushioned grip enhances operator comfort and offers additional control.
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Industrial applications in fabrication plants, welding shops, foundries, steel mills and shipyards.
Specifications
| Air Consumption (SCFM) |
44.0 |
| Power (hp) |
1.0 |
| Max. RPM |
20,000 |
| Tool Spindle Thread |
3/8"- 24 Male |
| Air Inlet Thread |
3/8" NPT |
| Exhaust Type |
Rear |
| GL_Country Of Origin |
US |
| Hose I.D. in. (mm) |
3/8" |
| Vacuum Type |
Non-Vacuum |
| Height in. (mm) |
1.875 |
| Length in. (mm) |
14.375 |
| Weight lb. (kg) |
3.46 |
| Width in. (mm) |
4.38 |
| Pkg. Height in. (mm) |
2.75 |
| Pkg. Length in. (mm) |
16 |
| Pkg. Weight lb. (kg) |
4.41 |
| Pkg. Width in. (mm) |
4.38 |
| CE Certified |
Yes |
| EAN (UPC) |
0616026527225 |
| EAC Certified |
Yes |
| Tool Style |
Straight Line |
What our Experts Think
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Extended reach design for grinding and finishing inside tight or recessed work areas.
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Powerful 1 HP air motor delivers consistent performance for demanding industrial applications.
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20,000 RPM free speed supports fast material removal and efficient surface preparation.
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Governor-controlled motor helps maintain speed under load for more uniform results.
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Rear exhaust system directs air away from the workpiece, improving visibility and finish quality.
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Safety-lock lever and cushioned grip enhance operator control and reduce fatigue during extended use.
- Compatible with cone and plug wheels up to 1-1/4"–1-1/2" diameter, making it versatile for weld blending, deburring, and metal finishing.
Q&A
Q: What is the DYNABRADE 52722 used for?
A: A heavy-duty pneumatic extension wheel grinder designed for cleaning metal, smoothing weld seams, deburring, and removing surface imperfections in hard-to-reach areas.
Q: What makes the 6-inch extension useful?
A: The 6" extended shaft provides access to deep recesses, narrow openings, and confined work areas where standard grinders cannot reach.
Q: How much power does it deliver?
A: It features a 1 HP air motor for demanding industrial grinding applications.
Q: What is the maximum operating speed?
A: The grinder operates at up to 20,000 RPM for fast material removal and efficient surface preparation.
Q: What wheel sizes does it accept?
A: It is designed for cone or plug wheels up to 1-1/4" to 1-1/2" diameter, depending on accessory selection.
Q: Does it maintain speed under load?
A: Yes, the governor-controlled motor helps maintain consistent RPM during demanding grinding operations.
Maintenance Tips
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Use clean, dry compressed air: Install a filter/regulator and keep moisture out of the air supply to protect internal motor components.
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Lubricate daily: Add a few drops of pneumatic tool oil to the air inlet before use to reduce vane and bearing wear.
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Maintain proper air pressure: Operate at the manufacturer's recommended pressure to ensure consistent RPM and prevent premature motor wear.
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Inspect extension shaft regularly: Check for bending, vibration, or excessive runout, especially after heavy grinding applications.
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Verify wheel condition before use: Replace cracked, chipped, or worn cone and plug wheels immediately. Never use damaged abrasives.
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Match wheel RPM ratings: Always ensure the abrasive wheel's maximum RPM rating meets or exceeds the grinder's 20,000 RPM capability.
Damage 
Loss 
Theft 
