Granite Straight Edge

The Ultimate Reference for Precision and Stability

The Granite Straight Edge is a foundational precision instrument,engineered to deliver an absolute geometric reference for verifying flatness,straightness,and alignment in demanding industrial and laboratory environments.Its inherent material properties and master craftsmanship make it the definitive choice for critical measurement tasks.

Core Advantages of Granite

Unmatched Dimensional Stability:Exhibits a near-negligible thermal expansion coefficient,ensuring consistent accuracy unaffected by workshop temperature fluctuations.

Superior Vibration Damping:Naturally absorbs and dissipates vibrations,providing a"quiet,"stable reference plane essential for repeatable measurements.

Exceptional Durability:Harder than tool steel,it resists wear,corrosion,and impact,guaranteeing a long service life with minimal degradation of accuracy.

Metrologically Neutral:Non-magnetic,non-conductive,and chemically inert,it is suitable for all materials and specialized environments without risk of interference.

Precision Engineering

Each straight edge is precision-machined from select,fine-grained granite and finished to exacting tolerances through hand-lapping.This process achieves:

A True Geometric Edge:Providing a master reference line of exceptional straightness.

A Stable Reference Plane:Featuring a lapped surface of precise flatness for comprehensive assessment.

Rigid Structural Integrity:Designed with optimal cross-sectional geometry(e.g.,I-beam,wide base)to prevent deflection.

Primary Applications

Machine Tool Alignment&Maintenance:Verifying the straightness of lathe beds,milling machine ways,and grinder rails.

Surface Plate Calibration:Serving as the master tool for inspecting and certifying the flatness of granite and cast iron surface plates.

Visual Gap Inspection:Enabling the traditional and highly sensitive method of assessing workpiece flatness using light or feeler gauges.

Precision Layout&Assembly:Providing an unchanging true line for scribing,setup,and alignment in toolrooms and quality control stations.