Dynabrade 51701 Straight-Line Pencil Grinder
- Horsepower: 0.1 hp
- Maximum Rotational Speed: 60000 rpm
- Power Source: Pneumatic
- Material Type: Metal, Rubber
Refresh date unavailable · Based on the Amazon listing and published specifications, not hands-on testing.
A compact air-turbine pencil grinder for fine detail work, not a substitute for a full-size die grinder when there is real material to remove.
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ASIN: B003OT4P0KModel: 51701Category: Straight Grinders
Overview
The Dynabrade 51701 is a 0.1 hp straight-line pencil grinder built around a turbine air motor that spins to 60,000 rpm, with rear exhaust and a 3mm collet for mounted points and small carbide burrs. It suits close, one-handed finishing work rather than stock removal.
Pencil grinders like this occupy the gap between a full-size die grinder and a handheld rotary tool: small enough to reach into recesses, but still air powered for sustained use. Rear exhaust routes spent air away from the cutting point instead of blowing debris back at the operator, a detail that matters more on fine finish work than on rough grinding. At 60,000 rpm the tool is geared toward light polishing and deburring with small mounted points, not heavy material removal.
- 0.1 hp turbine air motor
- 60,000 rpm free speed
- Rear exhaust
- 3mm collet
Who it's for
Suits die and mold finishers, metal fabricators cleaning up welds in tight spots, and anyone doing detail deburring where a full-size grinder will not fit. Not the tool for removing heavy stock or grinding welds down fast.
Pros and cons
- Reaches into tight spots a full-size die grinder cannot
- 60,000 rpm suits small carbide burrs and mounted points
- Rear exhaust keeps debris away from the cutting point
- Low torque compared to larger die grinders
- Not built for heavy material removal
- Requires a compressed air line to run
Performance notes
The turbine air motor is what lets a tool this small reach 60,000 rpm, since turbine motors spin up faster and lighter than vane motors at the cost of low-end torque. That speed suits small-diameter burrs and points, which need rpm rather than torque to cut cleanly. Rear exhaust keeps air and fine debris moving away from the workpiece and the operator's line of sight.
Specifications
| Brand | Dynabrade |
|---|---|
| Model | 51701 |
| Dimensions & fit | |
| Item Weight | 0.79 pounds |
| Capacity & performance | |
| Maximum Rotational Speed | 60000 rpm |
| Power & efficiency | |
| Horsepower | 0.1 hp |
| Power Source | Pneumatic |
| Construction & materials | |
| Material Type | Metal, Rubber |
| Color | Multi |
| Included components | |
| Unit Count | 1 |
| Included Components | Parts Page, Pencil Grinder |
| Other details | |
| Number Of Items | 1 |
| Style Name | Pencil |
| Item Type Name | Dynabrade 51701: .1 Hp Straight-Line Pencil Grinder |
| Item Highlight | 60,000 RPM, Turbine Air Motor, Rear Exhaust, 3 Mm Collet, 1/4" NPT Air Inlet, Non-Vacuum, Turbine Driven, Pencil Grinders |
Frequently asked questions
What collet size does the Dynabrade 51701 use?
It takes a 3mm collet, sized for small mounted points and carbide burrs rather than larger grinding accessories.
What top speed does the 51701 run at?
Its turbine air motor spins to 60,000 rpm.
Does the Dynabrade 51701 exhaust air toward the workpiece?
No, it uses rear exhaust, which routes spent air away from the cutting area instead of back at the work.