Gear Measuring Machines
Gear quality cannot be judged from point-by-point probing on a general-purpose CMM. Profile and helix are continuous curves that must be scanned and compared against theoretical involute and helical paths. A gear measuring centre couples a high-accuracy rotary axis with linear axes to output standard profile, helix, cumulative pitch and runout charts, graded to ISO, DIN or AGMA. It covers cylindrical and bevel gears, worms and wormwheels, splines, and gear cutting tools such as hobs and shaving cutters.
6 products
Why a dedicated gear measuring machine instead of a CMM?
A general-purpose CMM can measure a gear's dimensions, but it cannot properly evaluate one. Profile and helix are continuous curves; sampling them as discrete points and fitting afterwards loses the deviation you actually need to grade.
A gear measuring machine drives a precision rotary axis against the linear axes and scans along the theoretical involute and helix, then reports profile, helix, cumulative pitch error and radial runout as standard charts graded to GB, ISO, DIN and AGMA. The output is an acceptance document, not a set of coordinates.
How do you size a gear measuring machine?
Size it in this order: outside diameter, distance between centres, then module. All three have to cover the part before accuracy is worth discussing.
The Rotarus range has six models, separated by the largest workpiece diameter each accepts, from Rotarus 30 to Rotarus 120. The Rotarus 120 takes parts up to 120 mm outside diameter, spans 10–1000 mm between centres, covers module 0.5–40 and offers 800 mm of vertical measuring range. If a part exceeds the envelope, step up a model rather than working around it with fixturing.
Which gears and cutting tools can be measured?
Cylindrical gears, bevel gears, worms and worm wheels, and splines, plus gear cutting tools such as hobs and shaving cutters. Cutting tools in particular depend on dedicated evaluation algorithms — general measurement software rarely produces a usable verdict on them.
Can gears be inspected on the production line?
Yes. The GWS shop-floor gear measuring centre is built for that: quick-clamp fixturing and automatic correction for eccentric workpiece mounting, with a structure designed for shop-floor conditions rather than a temperature-controlled room. It is used for in-line gear production and on-site quality monitoring.
On the software side, NET-GEAR handles profile, helix and pitch evaluation and shares its data layer with the rest of AEH's software, so results flow into the EMRP quality management platform without re-entry.
