Mechanical Drives and Bearings Flashcards

What is the function of a taper lock bushing in a power transmission system?

Answer: To provide a removable, keyless clamping connection between a shaft and component

A taper lock bushing uses a tapered split design that clamps tightly onto a shaft when cap screws are tightened, providing a strong, concentric connection that is easily installed and removed without special tools.

What does the designation 6205-2RS on a bearing indicate?

Answer: A deep groove ball bearing with a 25 mm bore and two rubber seals

The 6205-2RS designation indicates a 6200-series deep groove ball bearing (62), with a 25 mm bore (05 × 5 = 25), and two rubber contact seals (2RS).

When adjusting a variable speed sheave drive, what happens when the sheave faces are moved closer together?

Answer: The belt rides higher in the sheave, increasing the effective pitch diameter

When the variable speed sheave faces move closer together, the V-belt is forced to ride higher (larger effective pitch diameter), which changes the speed ratio and increases the output speed if applied to the driver sheave.

What is the most common cause of premature failure in sealed bearings?

Answer: Contamination ingress through damaged or worn seals

Contamination ingress through compromised seals is the leading cause of premature sealed bearing failure. Even microscopic particles of dirt or moisture can cause abrasive wear and corrosion of raceways and rolling elements.

What tool is used to properly tension a synchronous belt drive?

Answer: A belt tension gauge or sonic tension meter

Synchronous belt tension is measured with a belt tension gauge (force-deflection method) or a sonic tension meter that measures belt vibration frequency to determine the installed tension precisely.

In a planetary gear system, what is the function of the ring gear?

Answer: It meshes internally with the planet gears and forms the outer boundary of the gear set

The ring gear (annulus) is the outermost gear in a planetary set with internal teeth that mesh with the planet gears. It can serve as input, output, or a fixed reaction member depending on the configuration.