Key Features
- Outside micrometer with choice of measuring range and disc-style anvil/spindle pair measures thickness of narrow grooves and difficult or closely spaced areas, such as slots and recesses
- Digit display has 0.0001" graduation intervals and 0.0002" accuracy for precise readings and accurate measurements
- Hardened, ground, and micro-lapped anvil/spindle pair provides wear resistance
- Locking lever locks measurement in place for accurate reading
- Friction thimble provides smooth and quiet operation, and is suitable for one-handed operation
Product Description
The Fowler 52-250 series EZ-Read outside micrometer has a digit display with a 0.0001" resolution, a choice of measuring range, and a disc-style anvil/spindle pair to measure thickness of narrow grooves and difficult or closely spaced areas, such as slots and recesses. Disc micrometers are also used to measure ribs, keys, fins, cutting edges on forming tools, and the chordal thickness of gear teeth. The digit display has a 0.0001" resolution and an accuracy of 0.0002" for precise readings and accurate measurements. The anvil/spindle shafts have a 0.256" diameter, and hardened, ground, and micro-lapped measuring faces provide wear resistance. The discs have a 0.788" diameter, 0.315" center-hole diameter, 0.035" edge thickness, a 0.130" total depth, and 0.00004" flatness. The hardened, ground, and lapped spindle thread provides smooth movement, accuracy, and long life. The locking lever on the spindle locks measurements in place for accurate readings. A friction thimble applies constant force for repeatability between users. Friction-style thimbles are suitable for one-handed operation and stop turning when the spindle comes into contact with the workpiece, providing constant force for consistent measurements between operators. The micrometer includes a wrench and a fitted case.
Specifications
| Display type | Digit |
| Anvil/spindle style | Disc |
| Measuring range | Varies |
| Graduation interval | 0.0001" |
| Accuracy | 0.0002" on 1" and 2" micrometers |
| Thimble style | Friction |
| Disc diameter | 0.788" |
| Disc center hole diameter | 0.315" |
| Disc edge thickness | 0.035" |
| Total disc depth | 0.130" |
| Anvil/spindle diameter | 0.256" |
| Flatness | 0.00004" |
Micrometers are precision measuring instruments that use a calibrated screw to measure distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.
The Fred V. Fowler Company manufactures inspection and measurement instruments such as electronic indicators, calipers, bore gages, and digital scales. The company, founded in 1946, is headquartered in Newton, MA.
What’s in the Box?
- Fowler 52-250 series EZ Read disc micrometer
- Standard (for micrometers 2" and above)
