V-block for CMM (Coordinate Measuring Machine)

V-Block for CMM(Coordinate Measuring Machine)

Precision Fixturing Solution for Cylindrical&Round Component Measurement

Product Definition&Purpose

A CMM V-Block is a specialized precision fixturing tool designed specifically for holding and positioning cylindrical,round,or spherical workpieces during coordinate measurement operations.Engineered to provide secure,repeatable positioning while maintaining accessibility for probe contact,these V-blocks transform challenging round-part measurement into a reliable,standardized process.Unlike generic workshop V-blocks,CMM-specific versions are manufactured to metrology-grade tolerances with features optimized for CMM environments and workflows.

Design Philosophy:Precision Fixturing for Metrology

CMM-Optimized Design Principles

Maximum Probe Accessibility:Open design with minimal material around the V-groove to allow probe approach from all necessary angles

Stable Yet Compliant Holding:Pre-calculated clamping force that secures without distorting delicate or thin-walled cylindrical parts

Ground Reference Surfaces:Precision-ground bottom and side faces for accurate registration on CMM tables and repeatable positioning

Modular Integration:Designed to work with standard CMM fixture plates,magnetic bases,or modular grid systems

Material Selection for Metrology Applications

Granite Construction:Premium black granite provides exceptional stability,vibration damping,and wear resistance

Alternative Materials:Tool steel,carbide,or ceramic options for specific applications requiring different material properties

Surface Treatments:Hardened surfaces in contact areas,non-marring coatings for delicate workpieces,or conductive treatments for ESD-sensitive environments

Technical Specifications&Accuracy Grades

Metrology Grade(Highest Precision)

V-Angle Accuracy:90°±15 arc-seconds(±0.0042°)

Centerline Positioning Repeatability:±0.002mm(2µm)for identical parts

Surface Flatness(Base):0.003mm per 100mm(0.00012"per 4")

Parallelism(Sides to Base):0.005mm per 100mm(0.00020"per 4")

Surface Finish(V-Groove):0.4µm Ra(16µin)or better

Typical Applications:Calibration labs,aerospace component inspection,high-precision manufacturing

Inspection Grade(Production Precision)

V-Angle Accuracy:90°±30 arc-seconds(±0.0083°)

Centerline Positioning Repeatability:±0.005mm(5µm)for identical parts

Surface Flatness(Base):0.008mm per 100mm(0.00032"per 4")

Parallelism(Sides to Base):0.010mm per 100mm(0.00040"per 4")

Surface Finish(V-Groove):0.8µm Ra(32µin)or better

Typical Applications:Automotive QC,general manufacturing inspection,production metrology

Workshop Grade(General Purpose)

V-Angle Accuracy:90°±1 arc-minute(±0.0167°)

Centerline Positioning Repeatability:±0.010mm(10µm)for identical parts

Surface Flatness(Base):0.015mm per 100mm(0.00060"per 4")

Parallelism(Sides to Base):0.020mm per 100mm(0.00080"per 4")

Surface Finish(V-Groove):1.6µm Ra(63µin)or better

Typical Applications:Toolroom setup,educational use,non-critical inspection