DYNABRADE 4" (102 mm) Dia. Straight-Line Type 1 Wheel Grinder - 52374
- 1 hp, 15,000 RPM, Rear Exhaust, 3/8"-24 Spindle Thread.
- Type 1 Wheel Grinder, for cleaning metal, grinding and smoothing weld seams, removing imperfections before painting.
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4" Diameter, Straight Line, 1 hp, 15,000 RPM.
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Accepts optional 4" diameter Type 1 Wheel, with 3/8" center hole (maximum wheel width of 1/4").
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Governor-controlled motor maintains RPM under heavy load; rear exhaust.
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Safety-lock lever is included on all models.
SpecificationsĀ Ā
| Air Consumption (SCFM) |
39.0 |
| Power (hp) |
1.0 |
| Max. RPM |
15,000 |
| 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) |
4.5 |
| Length in. (mm) |
9.75 |
| Weight lb. (kg) |
3.1 |
| Width in. (mm) |
6.5 |
| Pkg. Height in. (mm) |
4.5 |
| Pkg. Length in. (mm) |
10 |
| Pkg. Weight lb. (kg) |
3.88 |
| Pkg. Width in. (mm) |
6.25 |
| CE Certified |
Yes |
| EAN (UPC) |
0616026523746 |
| EAC Certified |
Yes |
| Tool Style |
Straight Line |
What our Experts Think Ā
Q&A Ā Ā
Q: What is the DYNABRADE 52374 used for?
A: A high-speed pneumatic straight-line Type 1 wheel grinder designed for aggressive metal removal, weld cleanup, deburring, and surface preparation before finishing or coating.
Q: What type of wheel does it use?
A: It uses 4" (102 mm) Type 1 reinforced grinding wheels with a 3/8" center hole for fast, controlled material removal.
Q: What is the power and performance level?
A: It features a 1 HP air motor built for continuous heavy-duty industrial grinding applications.
Q: What is the operating speed?
A: It runs at up to 15,000 RPM, providing fast cutting and grinding performance while maintaining control under load.
Q: What makes the straight-line design useful?
A: The inline body improves stability and control, especially when working on weld seams, edges, and flat metal surfaces.
Q: What materials can it be used on?
A: Suitable for steel, stainless steel, castings, welds, and other ferrous metals requiring shaping or cleanup.
Q: Does it maintain speed under load?
A: Yes, it uses a governor-controlled motor to help maintain consistent RPM during heavy grinding pressure.
Maintenance Tips Ā Ā
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Use clean, dry compressed air: Prevents vane wear and keeps RPM stable under load.
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Lubricate daily: Add a few drops of air-tool oil before use to protect internal vanes and seals.
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Maintain correct pressure (~90 PSI): Ensures consistent 15,000 RPM performance and avoids overspeeding.
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Use only RPM-rated 4" Type 1 wheels: Wheels must be rated ā„15,000 RPM to prevent failure.
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Inspect wheels before every use: Never run cracked, chipped, or dropped wheelsāhigh-speed breakage risk is severe.
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Check spindle & 3/8"-24 threads: Keep mounting surfaces clean and tight to prevent wobble and imbalance.
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Watch for vibration at startup: Any shake indicates imbalanceāstop immediately and re-mount wheel.
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Keep rear exhaust clear: Prevents overheating during continuous grinding.
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Inspect air hoses & fittings: Air leaks reduce torque and cause unstable RPM under load.
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Clean after use: Remove grinding dust from spindle, guard area, and housing to maintain balance and airflow.
Damage 
Loss 
Theft 
