Master Visual-Tactual Block Set-8 Blocks-Case

Eight Block Master Visual-Tactual Set. This Master Set contains eight individual Rectangular Blocks, each Measuring 1 3/8" x 1 7/8". They are Made of corrosion Resistant Electroformed Nickel and are duplicates of actual conventionally Machined surfaces. There are fifteen replicated Machined surface Finish specimens ranging from 2 to 125 Microinches. The Master Visual-Tactual Set is supplied in a Protective velvet-lined Case complete With engineering data and instructions. individual Blocks are available and Can be purchased separately. inside of cover contains data on terminology (lay, flaws, waviness, AA, etc.) Now available in a complete Set or individual Blocks. Simple To Use. Select the individual Block which represents the Roughness average (Ra) that you want to compare. Place the Block aLongside the workpiece and draw the Tip of the fingernail across the surface at right Angles to the tool mark. The feel of the fingernail contact must be the same if the Finishes are identical. Model No. 16040, Master Visual-Tactual Block Set. supplied in a Deluxe velvet-lined Case.