- BST-1B :
Inside diameter measuring instrument with a wide measuring range.
Measuring depth and measuring force adjustable. - BST-2B :
For measuring the inside diameters of small precision parts - BST-3LB :
For measuring large parts of up to 260 mm in diameter.
Measuring depth and measuring force adjustable 
BST-3LB CAD Drawing
Specifications
Model BST-1B BST-2B BST-3LB Without indicator With indicator 3M-100 Without indicator With indicator 3M-100 Without indicator With indicator 3M-100 Range Φ4～67mm Φ2～23mm Φ10～260mm Measuring depth adjustment 15mm 3mm 15mm Measuring force 0.98～2.94N 1.47N 0.98～4.90N Contact point stroke 3mm 1mm 5mm Standard contact point 1 F-050 F-060 F-070, F-071. F-072, F-073 _Because this inside diameter measuring instrument is a comparator, a datum gauge is required.
If the dimensional difference between this datum gauge and the workpiece being measured is large, an error occurs.
1 Various other contact points are available.
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