Sonja Kühne
Marketing/Technical Consulting ZWP
+49 9187 9522-264
+49 9187 9522-40
sonja.kuehne@frenco.de
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Jörg Göldner
Technical Sales/Technical Consulting ZWP
+49 9187 9522-231
+49 9187 9522-50
joerg.goeldner@frenco.de
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Double Flank Gear Inspection Machines

The double flank gear test is a quick and simple inspection method for gears.

The basic principle of the double flank gear test is based on a master gear (a near perfect gear) and a workpiece in rolling contact, free from backlash. The inspection machine has one rotational axis which is fixed and one which is movable. The centre distance variations during the rolling process are caused by form errors on the workpiece and are the basis for the quality assessment. Depending on your workpiece geometry, FRENCO provides various types of machines.

All Machines can be combined with the FRENCO MEG32 Measuring Electronics. The evaluation is then carried out by the FRENCO Software FGIpro.

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New: Robust design with granite machine base for highest accuracy

Model ZWP 28G

The double flank gear test is a quick and simple inspection method for gears.

  • Very flexible construction
  • Exact height adjustment at the steady centre
  • attachment is done by cranks
  • Centre distance: Setting value is kept by scale, even when the carriage is moved
  • Measuring force readout via spring force: 1 – 11 N
  • Maximum workpiece diameter: 200 mm

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Specialist for small yet highly precise gears

Modell ZWP 06

  • For internal and external gears, worm gears and worms
  • Suitable for plastic gears
  • Module range: 0.15 – 1.00 mm
  • Minimum centre distance: 10 mm
  • Max. diameter of specimen: 80 mm
  • Repeatability with calibration set from FRENCO < 1.5 µm

Specialist for the shop-floor use

Model ZWP 14/24

  • For internal and external gears, worm gears and worms
  • Different bed length (ZWP 14/ZWP 24)
  • Low base price of the ZWP 24 due to the modular system
  • Minimum centre distance: 20 mm
  • Max. diameter of specimen: 400 mm (single end) / 160 mm (between tips)
  • Repeatability with calibration set from FRENCO < 1.5 µm

Specialist for Highest Precision

Model ZWP 18

  • For internal and external gears, worm gears and worms
  • Sophisticated setup allows high precision measurements
  • Universal measuring machine, suitable for laboratories
  • Minimum centre distance: 20 mm
  • Max. diameter of specimen: 200 mm (single end) / 160 mm (between tips)
  • Repeatability with calibration set from FRENCO < 1.5 µm

Specialist for Large Gears

Model ZWP 30

  • For large external gears, shafts and worms
  • Despite heavy weight loads, a granite machine base and cross roller bearings guarantee precise measurements
  • Stable and optimised design for the shop-floor use
  • Changeover for other specimens is easily and quickly to handle
  • Minimum centre distance: 70 mm
  • Max. diameter of specimen: 500 mm
  • Max. shaft length: 750 mm

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Calculating the Dimension over Balls DOB“

For the double flank gear test, the variations in centre distance during one full rotation are detected and displayed as a roll curve. The roll curve comes up to the radial changing of the specimen compared to a master gear, almost free from errors. Adjusting the gear tester with known centre distances (setting masters) the absolute value is known and can be converted to the radial ball dimension of the specimen. From this, the dimension over balls can be calculated.

Information regarding Calculation