This product page describes the Radial Magnet Bearing (1) Assembly — original repair part for Shimadzu TMP-803 and TMP-1503 series molecular pumps. The assembly is a precision magnetic/radial support component designed to stabilize the rotor magnet and maintain concentric rotation under high-speed, high-vacuum conditions typical of turbomolecular pumps.
Key functions:
- Provide non-contact radial support to the rotor magnet for reduced wear and long life.
- Maintain rotor centering and minimize lateral runout during high-RPM operation.
- Work in concert with thrust/magnetic bearings and housings to ensure stable pumping performance and low vibration.
- Original equipment manufacturer (OEM) geometry and magnetic tolerances to preserve pump balance and performance after repair.
Main features and benefits:
- OEM quality — manufactured to original Shimadzu specifications for fit and function.
- Precision magnetic alignment and tolerance control to reduce vibration and extend rotor life.
- Direct replacement form, fit, and function for TMP-803 and TMP-1503 series molecular pumps.
- Supplies consistent axial/radial stability necessary for long-term vacuum stability and pump reliability.
Compatibility:
- Designed for Shimadzu TMP-803 series molecular pumps.
- Designed for Shimadzu TMP-1503 series molecular pumps.
Technical considerations:
- Material and finish: magnetic alloy components and machined housings per OEM requirements (materials chosen to preserve magnetic properties and vacuum compatibility).
- Tolerance and balance: manufactured to tight concentricity and balance tolerances to avoid introducing imbalance into the rotor assembly.
- Cleanliness: supplied cleaned for vacuum use; avoid contamination (oil, dust, particulate) during handling and installation.
Installation guidance (summary):
- Perform installation in a clean, particle-controlled environment (clean bench or laminar flow hood recommended).
- Verify rotor and stator surfaces are free of damage; inspect magnets for chipping or coating degradation before assembly.
- Follow the pump manual for disassembly and reassembly torque values and sequence to prevent misalignment.
- Use only recommended lubricants or grease where specified by the manufacturer; magnetic bearings are non-contact but surrounding mechanical parts may require lubricants specified by Shimadzu.
- After installation, perform a static and dynamic balance check and a vibration inspection at startup to confirm correct installation and operation.
Maintenance and troubleshooting tips:
- Regularly monitor vibration, bearing temperature, and pump speed — deviations can indicate misalignment, contamination, or bearing degradation.
- If unusual noise, increased vibration, or reduced pumping performance occurs after repair, stop the pump and inspect the radial bearing assembly and rotor for signs of contact or contamination.
- Use only original or certified replacement parts to maintain performance and avoid warranty/compatibility issues.
Ordering and part identification:
- Part name: Radial Magnet Bearing (1) Assy — 1003 (Shimadzu Option Parts)
- Compatible models: TMP-803, TMP-1503 series
- When ordering, confirm pump model, serial number, and any related part numbers from the pump nameplate to ensure correct fitment.
- For OEM replacement parts and service information, see our parts and maintenance offerings: Shimadzu molecular pump non-standard maintenance parts.
Quality assurance:
- Each assembly is inspected against OEM dimensional and magnetic specifications before shipment.
- Functional verification and cleanliness checks are performed to ensure compatibility with high-vacuum service.
Related resources:
Packaging and shipping:
- Supplied in vacuum-clean packaging to protect magnetic surfaces and prevent particulate contamination.
- Fragile/precision item handling recommended; ensure the package is clearly marked and transported with shock protection.
Images:
(Product images are available on request. For image files, exploded views, and installation illustrations, please contact your parts representative or consult the linked product resource above.)
