For high-speed grinding, deburring, and surface finishing operations that benefit from direct tool alignment, the Ingersoll Rand M2H250RG4 M2 Series Straight Grinder combines a 1 HP motor with 25,000 RPM free speed, a 1/4" collet, and rear exhaust. The straight configuration keeps the tool body and mounted abrasive accessory aligned with the work area, making the grinder suitable for accessible surfaces, edges, openings, and component features where fast abrasive action matches the process requirements.
The Ingersoll Rand M2H250RG4 provides the fastest operating speed among the supplied M2H straight grinder configurations, supporting compatible mounted abrasive accessories used for material removal, blending, and surface preparation. Its 25,000 RPM operation makes careful accessory selection especially important because the abrasive's shank size, dimensions, operating overhang, and maximum permissible speed must match the tool and application. Rear exhaust directs discharged air toward the back of the grinder, helping keep the exhaust stream away from the immediate abrasive contact area and operator interface.
Type: Straight Grinder | Model: M2H250RG4 | Series: M2 Series | Motor Power: 1 HP | Free Speed: 25,000 RPM | Collet Size: 1/4" | Exhaust: Rear
Features:
- 1 HP pneumatic motor provides power for compatible grinding, deburring, blending, material removal, and surface preparation operations.
- 25,000 RPM free speed supports high-speed abrasive action when paired with properly rated mounted accessories.
- Straight configuration keeps the tool body and abrasive accessory aligned with the work area for direct material removal and finishing tasks.
- 1/4-inch collet accepts compatible mounted abrasive accessories with the correct shank diameter and maximum permissible speed.
- Standard straight tool layout suits accessible work locations that do not require the additional reach of an extended grinder configuration.
- Rear exhaust routes discharged air away from the immediate abrasive contact area and operator interface.
- Pneumatic operation supports repeated grinding tasks when supplied with clean, regulated, and properly conditioned compressed air.
Applications:
- Metal fabrication — deburring edges, removing localized material, and preparing accessible surfaces with compatible mounted abrasives.
- Foundry and casting operations — cleaning cast surfaces, openings, and component features suited to high-speed straight grinding.
- Weld finishing — blending and cleaning compatible weld areas where direct tool alignment provides suitable access to the workpiece.
- Equipment maintenance — performing high-speed material removal and surface preparation on machinery, fabricated parts, and metal components.
- Production metalworking — supporting repeated abrasive operations where a 25,000 RPM straight grinder and 1/4-inch collet match the accessory and process requirements.
FAQs:
- Q: What size abrasive shank fits the Ingersoll Rand M2H250RG4?
A: The grinder is equipped with a 1/4-inch collet. Use only compatible mounted abrasive accessories with the correct shank diameter, suitable dimensions and operating overhang, and a maximum permissible speed appropriate for the tool. - Q: What is the free speed of the M2H250RG4?
A: The specified free speed is 25,000 RPM. Mounted abrasive accessories must be compatible with the 1/4-inch collet and rated for the actual operating speed, accessory dimensions, and overhang conditions. - Q: How does the M2H250RG4 compare with the M2H200RG4?
A: Both supplied models are 1 HP M2 Series straight grinders with a 1/4-inch collet and rear exhaust. The M2H250RG4 operates at 25,000 RPM, while the M2H200RG4 operates at 20,000 RPM, making the M2H250RG4 the faster-running configuration. - Q: Why is mounted abrasive overhang important at 25,000 RPM?
A: Increasing the distance between the collet and abrasive head can reduce the maximum permissible operating speed of a mounted abrasive. Follow the abrasive manufacturer's speed guidance for the actual accessory dimensions and operating overhang. - Q: What should be checked before installing a mounted abrasive accessory?
A: Confirm the accessory has a compatible 1/4-inch shank, suitable dimensions and operating overhang, and a maximum permissible speed that meets the tool requirements. Follow the tool and abrasive manufacturer's inspection, mounting, and operating instructions.
Available Variations and Specifications
| Model | RPM | Output | Type | Weight kg (lbs.) |
Length mm (in) |
Height Over Spindle End mm (in) |
Air Flow On Load / No Load (L/s) |
Vibration / K (m/s²) |
|---|---|---|---|---|---|---|---|---|
| M2 Series Angle Grinders | ||||||||
| M2A090RP95 | 9,000 | M14 THD | Wire Brush – 5" max | 1.62 (3.56) | 236 (9.29) | 86 (3.39) | 19.8 / 10.4 | 4.6 / 1.6 |
| M2A120RG4 | 12,000 | Collet (6 mm & 1/4") |
Burr | 1.62 (3.56) | 227 (8.94) | 83 (3.28) | 19.8 / 8.0 | 2.3 / 0.8 |
| M2A120RP945 | 12,000 | M14 THD | 4-1/2" × 1/4" wheel – Type 27 | 1.71 (3.76) | 236 (9.29) | 86 (3.39) | 19.8 / 8.0 | 5.1 / 1.5 |
| M2A120RP95 | 12,000 | 5" × 1/4" M14 THD |
5" × 1/4" wheel – Type 27 | 1.77 (3.89) | 236 (9.29) | 86 (3.39) | 19.8 / 8.0 | 5.0 / 0.9 |
| M2A180RG4 | 18,000 | Collet (6 mm & 1/4") |
Burr | 1.62 (3.56) | 227 (8.94) | 83 (3.28) | 19.8 / 11.8 | 3.1 / 1.0 |
| M2 Series Straight Grinders | ||||||||
| M2H180RG4 | 18,000 | Collet (6 mm & 1/4") |
Burr | 0.77 (1.69) | 213 (8.38) | N/A | 19.8 / 6.6 | 4.2 / 1.6 |
| M2H200RG4 | 20,000 | Collet (6 mm & 1/4") |
Burr | 0.77 (1.69) | 213 (8.38) | N/A | 19.8 / 8.0 | 4.4 / 1.1 |
| M2H250RG4 | 25,000 | Collet (6 mm & 1/4") |
Burr | 0.77 (1.69) | 213 (8.38) | N/A | 19.8 / 11.8 | < 2.5 |
| M2 Series Extended Straight Grinders | ||||||||
| M2X180RH63 | 18,000 | 3/8"-24 THD | 3" × 1/2" wheel – Type 1 | 1.48 (3.26) | 339 (13.35) | N/A | 19.8 / 6.6 | < 2.5 |
| M2X075RG4 | 7,500 | Collet (6 mm & 1/4") |
Sanding Drum (Mounted) |
1.35 (2.97) | 304 (11.95) | N/A | 19.8 / 11.8 | < 2.5 |
| M2X180RG4 | 18,000 | Collet (6 mm & 1/4") |
Burr | 1.22 (2.68) | 332 (13.08) | N/A | 19.8 / 6.6 | 2.8 |
| M2X200RG4 | 20,000 | Collet (6 mm & 1/4") |
Burr | 1.22 (2.68) | 332 (13.08) | N/A | 19.8 / 8.0 | < 2.5 |
| M2X250RG4 | 25,000 | Collet (6 mm & 1/4") |
Burr | 1.22 (2.68) | 332 (13.08) | N/A | 19.8 / 11.8 | < 2.5 |
| M2 Series Extended Angle Sanders | ||||||||
| M2L055RS9 | 5,500 | M14 THD | Sanding Pad | 1.90 (4.18) | 318 (12.52) | 91 (3.57) | 19.8 / 11.8 | 3.7 |
| M2L040RS9 | 4,000 | M14 THD | Sanding Pad | 1.90 (4.18) | 318 (12.52) | 91 (3.57) | 19.8 / 6.6 | 2.8 |
| M2L025RS9 | 2,500 | M14 THD | Sanding Pad | 1.90 (4.18) | 318 (12.52) | 91 (3.57) | 19.8 / 8.0 | 4.0 |
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