SPEEDAIRE
SPEEDAIRE 12V742 air compressor 0.4 HP 10cfm 20krpm
Right-angle die grinder delivers 0.4 hp at up to 21,000 rpm with 10 cfm air consumption
- Right-angle head reaches tight spots
- 4 hp motor delivers 21 000 rpm
- 10 cfm airflow powers steady grinding
- 1/4 in collet fits common accessories
- Mechanical brake stops wheel quickly
Right-Angle Die Grinder 0.4 HP
This right-angle die grinder delivers 0.4 horsepower and a free speed of 21,000 RPM for medium-duty metalwork. It accepts a 1/4-inch collet and operates on compressed air at 10 CFM. The barrel grip and compact head suit grinding, deburring and finishing in tight spaces. A mechanical brake stops the spindle quickly when the trigger is released.
Check Air Supply and Fittings
Verify that your compressor can sustain 10 CFM at the required pressure before ordering. The tool uses a 1/4-inch NPT female air inlet, so confirm hose and coupler compatibility. Ensure the work area has adequate ventilation for exhaust air and that the 1/4-inch Erickson collet matches your accessory shanks. No anti-restart or anti-kickback clutch is fitted.
Upgrades from Straight Die Grinders
This model replaces straight die grinders when access is limited by flange, frame or pipework. The right-angle head and mechanical brake reduce fatigue during repetitive edge-breaking or weld cleanup. The jump is worth it if your current tool cannot reach angled surfaces or lacks a rapid-stop brake for safety. Buyers needing higher torque or variable speed should consider other tool styles.
Highlights
- Right-angle head reaches tight spots
- 4 hp motor delivers 21 000 rpm
- 10 cfm airflow powers steady grinding
- 1/4 in collet fits common accessories
- Mechanical brake stops wheel quickly
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
Does the 12V742 come with the 1/4 in Erickson collet and a case, or do I need to buy them separately?
The kit includes the bare tool, a 1/4 in Erickson collet and a case, so no separate purchase is required.
How do I decide between the 0.4 hp and 10 cfm ratings when choosing this right-angle die grinder?
The 0.4 hp rating shows motor power, while 10 cfm is the air flow the tool needs; match both to your compressor’s output.
What does the 21,000 RPM maximum speed mean for daily grinding work?
At 21,000 RPM the grinder delivers fast material removal on steel, and the mechanical brake stops the wheel quickly after trigger release.
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