Optical Comparators
Pocket Optical Comparator RBM-1
Pocket Optical Comparator is made from clear acrylic cell which allows outside light to illuminate the object and accepts reticles of 27mm diameter. It is supplied with standard linear reticle in a carrying case 45x45x60mm, easy to carry in pocket or Tool Chest.
Radical Illuminated Optical Comparator RBM-103
Pocket Optical Comparator is made from clear acrylic cell which allows outside light to illuminate the object and accepts reticles of 27mm diameter. It is supplied with standard linear reticle in a carrying case 45x45x60mm, easy to carry in pocket or Tool Chest.
Scale Patterns of Contact Reticules
Linear Scales
Total Length 20mm in 200 divisions, least count-0.1mm
Thread Size (mm)
9 Metric Screw Threads per mm : -0.25, 0.3, 0.35, 0.4, 0.45, 0.6, 0.75, 0.9 & 1mm
Thread Size (Inches)
9 Screw Threads shown in inches TPI : -8,14,16,18,20,24,28 & 32 and 50.
Counting Grid
10mm square divided into 0.5mm square
10mm scale in 100 parts
13 circles 0.1 to 0.25mm.
Radius Scale
10mm radius scale numbered every mm, graduated each 0.5mm-180 degress protractor numbered every 10-degrees each division.
Multi Gauge
0.3" X 0.4" grid in 0.025" squares/Two horizontal scales 0.4" with 0.005" divisions, 20mm with 1/1mm divisions. Angle scale 0-degress to 90-degrees in 1-degree divisions. Radius scale 1 to 10mm. Nine circles 1/1mm to 3mm dia.
Multi Scale
3 Horizontal scales : 20mm 1st scale 10-0-10 in 0.1mm division and 0-1 in 0.05mm, 2nd scale is 0-1/8" in 1/64". 90-degrees anle scale in 5-degrees division, 80-90-degrees in 0.1 degree. Arcs 0-10mm in 0.5mm, 0-1 in 0.1mm div. Angle scales 29, 55, 60 and 118-degrees. Left 10 circles 0.1 to 0.1mm div, right 10 circles from 0.005 to 1/64" dia.
Counting Grid
43mm dia-Angle scale reads 0-90 degrees, graduated every degree, numbered every 5-degrees. Radius scale: reads 1/16" to 3/3 numbered 1/32". Millimeter scale: 10mm, graduated every 1/10, numbered every mm. Inch scale: 1/2" long, graduated every 0.005", numbered every 0.01". Circle scales: 4 scales 1/64",1/32" 3/64", 1/16", 5circles 0.01" to 0.05". Width scales: 7 sizes 1/64" to 1/14".