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Figure 3: Topland chamfer on a pinion (left side), and on a gear (right side)
2.4 Mixing Straight Bevel Gears Made with Two-Tool Generators
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and Coniflex Gears Made with Circular Cutters
The question if older straight bevel gears, manufactured with a two-tool-
generator can be replaced by Coniflex parts, cut with a circular cutter is “yes”.
The flanks are the same and the differences are only at the root. If the correct
build procedure (for new and old single member replacements) is followed,
then the flanks and the tooth tips never get to see the clearance area below
the flank root transition of their mating member. The tooth tips only roll down to
the wear step. Any complications due to wear-step interference are resolved
by the application of topland chamfering.
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2.5 Strength of Coniflex Parts Made with Circular Cutters
Most applications where single gear members are replaced apply to straight
bevel gears. For this reason, this section about strength comparison was add-
ed to this chapter. The question was raised, if the strength of a Coniflex pinion
or gear may be lower than the strength of a gearset which was originally
manufactured with a two-tool generator.
Regarding the comparison of Coniflex straight bevel gears which have a
curved root line with straight bevel gears with a straight root line, the following
facts can be presented:
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