Ball Attachments Sample application Micrometer accessories • Ball attachment to fit micrometer anvils (ø 6,35 mm only) 101468M Metric No. Diameter (D) 101468M 5 mm Optical Parallels Series 157 These Optical Parallels allow you to inspect micrometers and other measuring tools. Using optical interference, they can inspect the measuring faces for parallelism and flatness. 157-904 Metric No. Diameter (D) Flatness Parallelism Remarks Content of Set 157-904 30 mm 0,1 μm 0,2 μm For micrometer range 25 - 50 mm 157-105 (25 mm), 157-106 (25,12 mm), 157-107 (25,25 mm), 157-108 (25,37 mm) Testing a micrometer for flatness and parallelism of anvil and spindle faces : flatness is indicated by straightness and regular spacing of interference fringes, and parallelism by how many fringes are visible. All products to be sold to commercial customers. Product illustrations are without obligation. Product descriptions, in particular any and all technical specifications, are only binding when explicitly agreed upon. 105
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