Fowler 52-520-485-0 Dial Indicator with Magnetic Back
- 0 to 1 inch measuring range, 0.001-inch graduations
- 2.25 inch AGD Group 2 continuous white dial
- 0-100 continuous dial, each revolution equal to 0.1 inch
- Magnetic back for most metal surfaces
- Carbide ball contact point, tolerance markers, adjustable bezel
- 1 year warranty, 7.3 x 4.9 x 3.1 inches
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A one inch dial indicator with a magnetic back so it can sit on a steel fixture or machine. It is analog and has no data output.
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ASIN: B00B5HQ29AModel: 52-520-485-0Category: Dial Indicators
Overview
Mounting on most metal surfaces through its magnetic back, this American Gage Design dial indicator reads surface variation on a large continuous dial. A revolution counter tracks full turns, and an adjustable bezel sets zero anywhere.
The magnetic back removes the need for a separate stand when the work is on or near a steel surface. Tolerance markers show limits at a glance. The limits are an analog readout and a listed weight that cannot be right.
Who it's for
A machinist or maintenance worker who wants a ready-to-mount gauge for steel set-ups will use the magnetic base. Those working on aluminum or plastic fixtures, or recording data electronically, should look at other mounting methods.
Pros and cons
- Magnetic back mounts without a stand
- Large continuous dial face
- Adjustable bezel sets zero anywhere
- Carbide ball contact point
- Analog readout only
- Listed weight is not usable
- Works on magnetic surfaces only
Performance notes
The spindle drives a pointer around a continuous dial where each revolution equals a set distance, and the counter tracks turns. The carbide ball resists wear at the contact point. Rigid mounting matters, since any movement of the magnetic base shows up as a reading.
Specifications
| Brand | Fowler |
|---|---|
| Model | 52-520-485-0 |
| Dimensions & fit | |
| Dimensions | 7.3 x 4.9 x 3.1 inches |
| Capacity & performance | |
| Measuring range | 0 to 1 inch |
| Warranty & support | |
| Warranty | 1 year |
| Other details | |
| Graduation | 0.001 inch |
| Dial face | 2.25 inch AGD Group 2, continuous |
| Contact point | Carbide ball |
| Per revolution | 0.1 inch |
| Back style | Magnetic back |
Frequently asked questions
Which surfaces will the Fowler 52-520-485-0 magnetic back hold to?
The listing says the magnetic back can mount the indicator on most metal surfaces.
What does AGD Group 2 mean for this indicator?
The listing names the American Gage Design Group 2 with a 2.25 inch dial face. It does not explain further.
How far does one turn read?
Each revolution equals 0.1 inch across a total range of 0 to 1 inch.
Is it digital?
No. It is a mechanical dial with a revolution counter.