Read the zero position of the scale Ⓐ in mm on the scale Ⓑ (29mm in the picture on the right)
Look at the scale Ⓐ and read the scale Ⓒ that comes to the same position as the scale Ⓑ (matching between bottom and top scales) (the above figures in 0.1 mm increments)
The total measured value of (1) and (2) is 29.6 mm.

Specification / Model	GBG1-40R40	GBG1-40R60	GBG1-60R50	GBG1-60R75
Stage Surface (mm)	40 X 40	40 X 40	60 X 60	60 X 60
Travel Distance	± 8º	± 6º	± 8º	± 8º
Height of Rotation Center	40±0.2mm	60±0.2mm	50±0.2mm	75±0.2mm
Guide	Ball Guide	Ball Guide	Ball Guide	Ball Guide
Drive (Moderating Ratio)	Worm & Gear (1/240)	Worm & Gear (1/240)	Worm & Gear (1/160)	Worm & Gear (1/225)
Rotation Angle	1.5º	1.5º	2.25º	1.6º
Stage Height	20±0.2mm	20±0.2mm	25±0.2mm	25±0.2mm
Load Capacity (kg)	2	2	4	4
Material	Aluminum	Aluminum	Aluminum	Aluminum
Weight(kg)	0.25	0.25	0.35	0.35

GBG1-40R40

GBG1-40R60

GBG1-60R50

GBG1-60R75

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