美國UNIVERSAL同心度測定儀規格：

E-10 Concentricity Gage is comprised of three main components for assembly. #1） selection of standard or precison accuracy, #2） selection of main rollers, #3） select an indicator（s） and/or other accessories. There are two classifications calibrated and directly traceable to （N.I.S.T.）, Standard Black Gages are guaranteed to be better than ≤ 4µm （.00016"） accuracy. Precision Gold Gages are guaranteed better than ≤ 2µm （.00008”） accuracy.

#E-10 Standard Concentricity Gage Model
#E-10P Precision Concentricity Gage Model

Gage Specifications:

Diameter Capacity: 1/8" to 1" （3mm to 25mm）
Diameter Zero Capacity: 3/32"to 1/2" （1mm to 12mm）
Length Capacity: ≤ 4" （102mm）
Standard Accuracy: ≤ 4µm （.00016”）
Precision Accuracy: ≤ 2µm （.00008”）
Gage Length: 10.5" （267mm）
Gage Width: 4.5" （114mm）
Shipping Weight: 4.9 lbs. （2.2 kg.）