Technical Data:
Series: 197
Product type: Micrometer Head, Long Stroke Non-rotating Spindle
Feature: Large thimble with non-rotating spindle
Feature: Dual-spindle mechanism for quick feeding
Feature: Bidirectional graduation
Feature: Floating thimble permits zero setting at any spindle position
Measuring face: Carbide tip
Measuring-face hardness: 90 HRA or more
Measuring face: Lapped
Scale finish: White anodized aluminum
Measuring range: 0 - 50 mm
Graduation: 0.005 mm
Graduation features: Bidirectional
Stem diameter: 18 mm
Stem: Plain
Spindle end: Flat (carbide tip)
Spindle pitch: 1 mm
Accuracy: +/-5 um

Dimensions:
Spindle Dia.=8 mm
Stem Dia.=18 mm, tolerance 0/-0.011 mm
Thimble Dia.=49 mm
Reference dimensions=14 mm; 64 mm; 79 mm
Retracted reference dimensions=29 mm and 89 mm
Speeder
Mass=300 g
Parenthetical dimensions apply with spindle fully retracted