Two types of Spherical Anvils are available:
Bowers 2-Point Spherical:
Measurement of ovality in bore.
Measurement of bores with irregularities.
Bowers 3-Point Spherical:
Gives good repeatability even when out of line with bore centre.
Available from 6-300mm diameter on digital systems.
Can be supplied as a 2 point (for ovality) or 3 point contact.
Available from 6-300mm.