PH Tool 90 Degree Curved 5-Step Block

PH Tool 90° Curved 5-Step Block for thickness and linearity calibration of curved surfaces. This 90° Curved 5-Step block is machined from solid 2" diameter bar.

Inch step thicknesses

• .100" 
• .200" 
• .300" 
• .400"
• .500"

ID radius is a constant 0.50" / 1.00" diameter.

Inch Block Curvature: 

• 0.500” step is a 1.0” radius 
• 0.400” step is a 0.9” radius 
• 0.300” step is a 0.8” radius 
• 0.200” step is a 0.7” radius 
• 0.100” step is a 0.6” radius 

Step face is 1.000" x 90° arc

The metric version is machined from solid 50.8 mm diameter bar.

Metric step thicknesses:

• 2.5 mm
• 5.0 mm
• 7.5 mm
• 10.0mm
• 12.5 mm

ID radius is a constant 12.7mm / 25.4mm diameter

Metric Block Curvature:

• 12.5mm step is a 25.2mm radius
• 10.0mm step is a 22.7mm radius
• 7.5mm step is a 20.2mm radius
• 5.0mm step is a 17.7mm radius
• 2.5mm step is a 15.2mm radius

Step face is 25mm x 90° arc.

In accordance with PH Tool Drawing No. 10177.