Ingersoll 409 Grinder
- Grinder
- Pneumatic
- 1.2 pounds
- 27000 rpm
A lightweight, high speed air die grinder suited to deburring and detail grinding for anyone already running shop air.
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How it ranks among the 150 grinders we track
4.6★ across 114 Amazon ratings, Bayesian-smoothed toward the category average.
114 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 150 grinders we track - how the scorecard works · full grinders data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Ingersoll 409 is an air-powered die grinder, spinning at up to 27000 RPM in a body that weighs just 1.2 pounds. It runs on shop compressed air rather than a battery or cord, and its speed class suits deburring and detail grinding work.
Ingersoll's pneumatic tools are built around shop air rather than batteries, which keeps the tool body light since there is no motor or cell to carry. At 27000 RPM this sits at the fast end of die grinders, a speed suited to quick material removal on small areas.
- Air powered, not battery or corded
- Up to 27000 RPM top speed
- 1.2 pound body weight
- 100 units bought in the past month
Who it's for
Users with a shop air compressor doing deburring, porting or detail grinding work. It is not an option for anyone without a compressed air source, since it cannot run without one.
Strengths and trade-offs
Drawn from this product's published specifications.
- High 27000 RPM speed for fast material removal
- Light at 1.2 lb for extended use
- Rated 4.6 from 114 reviews
- Requires a compressed air supply to run
- No hose, fitting or bit info listed
Performance notes
At 27000 RPM this sits at the fast end of die grinders, a speed class suited to removing burrs and shaping small areas quickly. The 1.2 pound body keeps fatigue down during extended one-handed detail work.
Specifications
| Brand | Ingersoll |
|---|---|
| Model | 409 |
| Power Source | Pneumatic |
| Item Weight | 1.2 pounds |
| Speed | 27000 rpm |
Other Ingersoll grinders
How it compares
This product against the closest alternatives we track in grinders.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Ingersoll 409 GrinderThis product | 4.6 / 5 | 114 | 4.0 / 5 |
| DEWALT DCG413B GrinderDeWalt | 4.8 / 5 | 9,600 | 4.6 / 5 |
| Milwaukee 2880-20 GrinderMILWAUKEE | 4.8 / 5 | 2,400 | 4.5 / 5 |
| AVID MW590 GrinderAVID | 4.5 / 5 | 6,100 | 4.4 / 5 |
| Makita 9557PBX1 GrinderMAKITA | 4.8 / 5 | 3,960 | 4.4 / 5 |
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Questions about the Ingersoll 409
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Ingersoll 409 need an air compressor?
Yes, it is air powered and will not run without a compressed air supply.
How fast does it spin?
Up to 27000 RPM, which is a high speed class within die grinders.
How much does it weigh?
About 1.2 pounds, light enough for extended one-handed detail work.