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O rendimento do par sem-fim (50–90 %) é menor que o de engrenagens cilíndricas: mais calor e consumo.
1. Entradas e ângulo de avanço
Mais entradas = mais rendimento. Uma entrada (~50–70 %) mantém autobloqueio; duas (~70–85 %) rendem mais sem autobloqueio.
2. Materiais
Sem-fim temperado e retificado; bronze de estanho melhor que alumínio.
3. Lubrificação
Película de óleo estável; banho de óleo preferível à graxa em serviço contínuo.
4. Precisão
Contacto uniforme reduz perdas.
5. Melhorias
Multi-entrada sem autobloqueio; tempera/retífica; bronze estanho; óleo correto. A Xinmi aconselha conforme o duty.
