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  • Cylindrical Bearings
    would produce stress concentrations at the ends of the roller-race contact, resulting in high wear and high sensitivity to misalignment. Instead, rollers are usually crowned or end relieved. Because they are used for high speeds, cylindrical roller bearings are commonly made in precision grades
  • Motion control and Optical encoders
    offers up to 18-bit resolution in a single-turn system or 36-bit in multiturn versions. The largest diameter hollow-shaft multiturn encoder measures 2 in. in diameter, with an overall housing diameter of only 4.56 in. Its multiturn resolution ranges up to 25 bits. Optical rotary encoders are the most
  • Precise moves depend on ball-screw threads
    during the grinding process. Whirling cuts threads in hardened-steel bars with a hollow tool wheel (whirling ring). Bars are centered with steady rests. Chips coming off the bar are red hot. Grinding, rolling, and whirling are the most common ways to thread ball screws. Some manufacturers use
  • Medical Device Link .
    A hollow-shaft stepper allows access for electrical and optical cables through the central axis of the motor. The 2.25-in.-diam motor is bidirectional and based on a 1.8 step with noncumulative position accuracy of +-3%. The peak torque rating is 50 oz-in. Other features include permanently

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