Starrett 68027 Outside Micrometer 5 Inch Range

Product Description

The STARRETT 68027 is a mechanical outside micrometer designed for precise linear measurement in machining, inspection, and fabrication environments. It covers a measurement range up to 5 inches with a graduation of 0.0001 inches and an accuracy of 0.000050 inches, making it suited for high-tolerance work where repeatable results are critical. The friction thimble provides consistent measuring force, reducing the risk of over-tightening against a workpiece. Measuring faces are solid carbide for long-term wear resistance. This tool is used by machinists, quality control technicians, toolmakers, and precision fabricators who require reliable dimensional verification on the shop floor or in the inspection room.

The STARRETT 68027 fits into workflows that demand tight dimensional control on metal parts, shafts, stock, and machined components up to 5 inches in diameter or thickness. It is appropriate for both job shop and production inspection environments. The satin chrome finish reduces glare under shop lighting. A ring-style lock nut and included wrench allow the spindle to be locked at a measured position for transfer or recording. Flat anvil geometry makes it compatible with flat, cylindrical, and round workpiece surfaces commonly encountered in general machining and tool-and-die work.

Key Features

• 0.000050 inch accuracy for high-tolerance measurement applications
• 0.0001 inch graduation for fine resolution on the thimble scale
• Solid carbide measuring faces resist wear on hardened and abrasive workpiece materials
• Friction thimble delivers consistent, repeatable measuring force
• Ring-style lock nut with included wrench for secure spindle locking
• Satin chrome finish minimizes glare and corrosion in shop environments

Compatibility

Designed as a standard outside micrometer for use in general machining, inspection, and fabrication applications requiring measurement up to 5 inches. Also referenced as Starrett Number T436.1XFL-5.

Installation Notes

Outside micrometers require no installation but should be calibrated against a known standard or gauge block before use, especially after transport or temperature change. Keep measuring faces clean and free of chips, oil, or debris before contact with a workpiece. Store in the provided case when not in use to protect the carbide faces and thimble mechanism. Calibration and use should follow applicable shop metrology procedures and any relevant quality management standards in the facility.