Groove Gauges & Limit Groove Gauges for Industry | ULTRA Shop

Buy high-precision groove limit gauges, hub keyway gauges, and digital DEMM caliper gauges for professional slot center distance measurement online.

Groove gauges and indicating slot measuring instruments from ULTRA and DEMM ensure rapid, high-precision dimensional inspection of internal and external groove geometries directly on the shop floor. Our B2B portfolio seamlessly covers all requirements of modern series inspection: choose between classic external groove limit gauges (block gauges) and hub keyway gauges for precise fit testing of shafts and hubs, or utilize digital DEMM DIGI OLFO caliper gauges including matching slot nuts for the exact determination of slot center distances. For maximum flexibility with customized dimensions, the ULTRA block gauges can be configured in the online shop down to 3 decimal places (0.001 mm steps). All our products guarantee seamless, traceable calibration through optional factory or DAkkS certificates.