Master Gears (HPR)
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Master Gears for all Requirements Highest standard - technically perfect

General Information Master gears enable you to carry out single and double flank gear rolling inspections as part of an integrated process within production - thus saving you both, time and money. The qualities of master gears are defined in DEUTSCHE NORM Lehrzahnrader zum Prufen von Zylinderradern - Master gears for checking cylindrical gears - Gear blanks and gearing Pignons-etalons pour la verifications des roues cylindriques - Corps de roue et denture The most relevant issues can be summarized as follows: • Area of application from module 0.2 mm • Division into three accuracy classes,...

Quality The following table shows the accuracy classes A, B and C of DIN 3970 in comparison to those of the DIN 3962/3963. The quality class A of master gears is mainly needed to inspect work pieces of tolerance class DIN Q4 and Q5. Quality A cannot always be manufactured. The quality class B of master gears is mainly needed to inspect work pieces of tolerance class DIN Q6 and Q7. This is the quality standard for uncoated master gears. The quality class C of master gears is mainly needed to inspect work pieces of tolerance class DIN Q8 and higher. This class is the quality standard for...

Product Overview Standard     Quality class B or C according to DIN 3970 Chrome steel CSP (low-corrosion) Base body in accordance with DIN 3970 Uncoated, no modifications Quality class A according to DIN 3970 High alloyed powder steel SX Tip chamfers PVD coatings (Quality class B or C) Modifications Master worms, master pinion gears Internal master gears Customized base bodies Modules smaller than 0.3 mm

Standard Going by the name “pure perfection”, all master gears are state-of-the-art. Short delivery times for master gears in standard quality - plus test certificate.  Quality class B according to DIN 3970 o With pitch and helix being the two critical parameters, both are more accurate than Q3  Gauge steel CSP (low-corrosion) o Low-corrosion material, coating (optional)  Base body according to DIN 3970 o The sizes are defined in DIN 3970 – with the clamping equipment being available, the master gears are of excellent value … yet of the highest quality – including a test certificate from...

Optional Extras “pure perfection” – with optional extras to your requirements Longer lifetime due to coating, protection of the test surfaces due to tip chamfers, modifications and much more. Useful options for many applications.  Quality class A according to DIN 3970 o  According to other standards like AGMA, ISO  High alloyed powder steel SX o Increased lifetime - even uncoated Impact protection for high-precision surfaces Improved running properties  TiN, TiAlN or TiCN coated - quality class B or C  Modifications  Special p

Tip Chamfers Tip chamfers improve running characteristics and protect the master gear against damage. The damage is not usually detected during the monitoring process of inspection equipment and can be quite “sneaky”. The sharp edge of the tip diameter touches first while the flank contact is running in. Tip chamfers serve to break this edge so that no damage can arise on the master gear. Coatings Coatings protect the surface against wear. The coating is much harder than any steel and also more wear resistant. At the same time, the layer serves as rust protection. As the coating process has...

Modifications Modifications are desired deviations of profile or helix from the ideal shape. Profile modifications In the case of master gears, this is usually accomplished as an adaptation of the specimen modifications. Profile angle deviation Modifications can be symmetric or asymmetric in relation to the left or right flank. Profile crowning Helix modifications Helix angle deviation symmetric Helix crowning symmetric Nearly all modifications and their combinations are possible. symmetric However, the manufacturing demands rise sharply for asymmetrical helix modifications in particular.

Special Master racks, master gear worms, master pinion gears for rack measuring devices, internal helical master gears and setting masters – as long as our manufacturing technology can do it, we can do it!  quantity: 1 – that’s what we are used to „pure perfection“ quality with test certificate Master gear worms Internal helical master gears Master pinion gears

Wear Measurement The inspection of master gears contains the measurement of the total profile, the helix, the total runout, the total pitch and the single pitch deviation on a high precision inspection machine. Additionally the bore and the major diameter are measured. Due to very small tolerances, master gears are not rejected until the tolerance is exceeded by more than the measuring uncertainty. This principle is also used for wear inspection to make sure that functional master gears are not rejected because of the measuring uncertainty. Master gears will slowly wear during their usage....

Regrinding Procedure Master gears wear during their usage. Often worn master gears can be reground. This service is offered by FRENCO. Detailed information about the procedure is available on request. FRENCO suggests the following tolerances of wear: One quality level for total runout and total pitch deviation. Cleaning of master gear Removal of minor damage Warenbegleitschein erstellen, Measuring the bore and the clocking Bohrung und band Prüfbund messen Returning of item Price 1 Two quality levels for total profile, total helix and single pitch deviation. Regrinding procedure yes Creating...

Frenco Product Range High Precision Gears and Splines H Rotation Measuring Systems R Gear and Spline Gauges Instruments with Measuring Circles Master Gears, Master Wheels Multiple Inspector Artefacts, Masters Gear Flank Analysing Linear Gear Flank Analyser Rack Gear Flank Analyser Double Flank Gear Roll Inspection Punches, Dies & Electrodes Profiled Clamping Systems Gear and Spline Manufacture Gear & Spline Inspection P DAkkS -Calibration Instruments for Size Inspection Series V Monitoring of Inspection Equipment Measuring Pins and Ball Inserts Workpiece Inspections Instruments, Rocking...