Fowler 54-860-242-0 Blade Micrometer 25-50mm IP54

Product Description

The FOWLER 54-860-242-0 is a mechanical blade micrometer designed for precision dimensional measurement in tight grooves, keyways, and narrow slots where standard anvil micrometers cannot reach. It covers a measurement range of 25 to 50 mm and delivers an accuracy of 0.000160 inches (0.0030 mm). A friction thimble provides consistent measuring force to protect both the workpiece and the instrument. A large, easy-to-read LCD display with digital counter makes reading values fast and reliable. The blade profile allows access to confined features that would otherwise require specialty gauging. This tool is built for machinists, quality control technicians, and toolroom professionals who need repeatable, traceable measurements in production or inspection environments.

The 54-860-242-0 is suited for measuring groove widths, slot depths, and recessed features on precision machined parts. The blade thickness of 0.0300 inches and blade depth of 0.3150 inches allow insertion into narrow channels. With an IP54 water resistance rating, it holds up in environments with light coolant splash and dust exposure common on the shop floor. Graduation is 0.0005 inches (inch mode) and 0.0010 mm (metric mode), supporting fine-tolerance inspection work. The included shop-hardened case keeps the instrument protected during storage and transport.

Key Features

• Measurement range of 25 to 50 mm for mid-range slot and groove inspection
• Blade thickness of 0.0300 inches and blade depth of 0.3150 inches for access to confined features
• Accuracy of 0.000160 inches for high-precision measurement
• Friction thimble for consistent, repeatable measuring force
• Large LCD display with digital counter for fast, clear reading
• IP54-rated for resistance to dust and light coolant splash
• Includes shop-hardened storage and transport case

Compatibility

Designed as a general-purpose mechanical blade micrometer for professional metrology and toolroom applications requiring measurement in the 25 to 50 mm range.

Installation Notes

Blade micrometers should be handled and stored by calibration or quality control technicians following standard metrology practices. Before use, zero the instrument against the reference standard included with the tool and verify calibration according to your facility's inspection schedule. Keep the blade clean and free of chips or coolant residue before each measurement to maintain accuracy. Do not overtighten the thimble; rely on the friction thimble mechanism to apply proper measuring force.