Comparison of Rotational Speeds and Torque Properties between Air-bearing and Ball-bearing Air-turbine Handpieces
نویسندگان
چکیده
منابع مشابه
Comparison of rotational speeds and torque properties between air-bearing and ball-bearing air-turbine handpieces.
We examined the effects of air pressure on the free-running speed of air-bearing and torque-type ball-bearing air-turbine handpieces. The air pressure for the former should be kept at a certain high level to maintain the stable super-thin air-bearing film and to provide the quasi-constant speed of around 420,000 to 480,000 rpm. On the other hand, the air pressure for the latter could be adjuste...
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ژورنال
عنوان ژورنال: Dental Materials Journal
سال: 1989
ISSN: 1881-1361,0287-4547
DOI: 10.4012/dmj.8.26