Semiconductor and electronics production equipment often combines a small motion envelope with demanding repeatability. In wafer handling, IC pick-and-place, bond-head, test-socket and SMT mechanisms, a cam follower may run close to sensitive handling or inspection functions. The application plan therefore places the smallest EP-KR / EP-KRV sizes first and emphasizes low disturbance, clean-environment lubrication and consistent motion rather than simply choosing the largest bearing that fits.
What matters most in semiconductor motion
Vibration and noise from the follower/track interface can interfere with a precision mechanism. Track condition, alignment and smooth rolling contact deserve attention during replacement.
the application guidance calls for cleanroom-oriented lubrication consideration. If PFPE or another low-volatility lubricant is required, state that explicitly because it is an ordered-configuration requirement rather than a default assumption.
Pick-and-place and handling mechanisms rely on repeatable travel. Stud seating, shoulder position and the actual cam/guide geometry must be checked along with the bearing code.
the application guidance prioritizes EP-KR13 through EP-KR22 for compact, high-speed equipment. Their catalogue speed references range from 29,000 rpm down to 17,000 rpm across this group.
Recommended starting models
The following four sizes are the specific application examples listed in the application requirements. Speed values come from the EP-KR / EP-KRV dimensional data and are reference values, not guaranteed operating limits for every semiconductor mechanism.
| EP model | D* (mm) | Stud thread | Speed reference | Application example |
|---|---|---|---|---|
| EP-KR13 / EP-KRV13 | 13 | M5×0.8 | 29,000 rpm | Wafer handler, IC pick-and-place |
| EP-KR16 / EP-KRV16 | 16 | M6×1 | 25,000 rpm | Bond-head mechanisms |
| EP-KR19 / EP-KRV19 | 19 | M8×1.25 | 20,000 rpm | Test-socket actuators |
| EP-KR22 / EP-KRV22 | 22 | M10×1.25 | 17,000 rpm | SMT placement heads |
Before confirming a clean or precision application
Measure outside diameter, outer-ring width, stud thread and the available shoulder/mounting space. A legacy CF marking is useful for identification but does not replace dimensional verification.
Tell us whether the mechanism has low-volatility, chemical-resistance or cleanroom lubricant requirements. The site does not assume that every EP-KRV configuration automatically meets a cleanroom specification.
If a removed follower shows a narrow wear band, surface marking or unusual noise, include a photo of the mating track. A new bearing will not correct a misaligned or damaged contact path.
Identify whether the follower is in wafer handling, bond-head, test, SMT or another mechanism, and include a drawing or photo when available. That makes the selection discussion much more precise.
Discuss a semiconductor-equipment track bearing
Send the existing model, required quantity, main interface dimensions, motion function and any lubricant or clean-environment restrictions. We can then compare the compact EP-KR / EP-KRV sizes without assuming unsupported interchangeability.