This product is the OEM radial assembly for Shimadzu TMP-2203 series molecular pumps — a single Unit containing Radial Magnet Bearing 1 and Radial Sensor 1 supplied as an original repair part. It is intended as a direct replacement for the radial unit in TMP-2203 pumps to restore bearing centering, magnetic suspension balance and radial position sensing for optimal pump performance.
Key selling points:
- Direct OEM replacement — manufactured to original Shimadzu tolerances for fit and function.
- Complete radial unit — magnet bearing and sensor matched and assembled to ensure correct magnetic coupling and sensing alignment.
- Improves rotor stability and reduces vibration when replacing worn or damaged radial components.
- Supplied ready for installation with no modification required for TMP-2203 series pumps.
Technical overview:
- Contents: one Radial Magnet Bearing 1 + one Radial Sensor 1 assembled as a single Radial Unit 1 Assy 2203.
- Application: TMP-2203 series molecular pumps (refer to pump model plate and service manual for verification).
- Materials & construction: precision magnetic elements and sensing components manufactured to OEM specifications for magnetic properties, concentricity and thermal stability.
- Function: magnetic radial support combined with active radial sensing to maintain rotor centering and minimize contact between rotor and stator surfaces.
Compatibility and identification:
- Confirmed compatibility with TMP-2203 series; not intended for other TMP model families without verification.
- If you need to confirm original spare options or non-standard maintenance spares, see the manufacturer spare parts listing: Shimadzu molecular pump non-standard maintenance parts.
- For ordering OEM repair assemblies and to ensure you receive the correct revision, consult the parts documentation: Radial Unit 1 Assy 2203.
Installation and service notes:
- Handle the radial magnet bearing with care — strong magnets can attract ferrous debris; keep surfaces clean and free of machining chips or dust.
- Follow anti-static precautions when handling the sensor. Avoid touching sensor faces and connector pins directly.
- Prior to installation, inspect the mating bore and rotor journal for wear. Replace damaged rotors or housings to prevent premature re-failure.
- Set rotor axial and radial clearances per the TMP-2203 service manual. After installation, perform static alignment checks and a controlled run-in at low speed, observing vibration and bearing currents.
- Perform vacuum and leak checks after reassembly to ensure the pump reaches specified ultimate pressure and has no new leaks introduced during service.
Maintenance and troubleshooting tips:
- Common failure signs: increased radial vibration, sensor fault codes, rising bearing currents or intermittent contact noise — these can indicate wear or sensor degradation.
- When replacing the radial unit, it is recommended to replace seals and O-rings that are disturbed during disassembly to maintain vacuum integrity.
- Keep replacement parts in original packaging until use and store in a clean, dry, low-magnetic-interference environment.
- If uncertain about diagnostics, request original service documentation or consult an experienced vacuum pump technician to avoid misdiagnosis.
Ordering and support:
Safety and handling reminders:
- Observe standard clean-room or clean-bench practices when servicing molecular pumps to avoid introducing contaminants into high-vacuum systems.
- Use appropriate torque settings and protective tools to avoid damage to delicate sensor components and magnetic assemblies.
- Dispose of replaced parts according to local regulations if they contain magnetic or electronic elements.
This Radial Unit 1 Assy 2203 is the recommended OEM choice when repairing TMP-2203 series molecular pumps to restore original performance and reliability. For parts availability, lead times and detailed compatibility confirmation, follow the OEM parts link above or contact an authorized distributor or service partner.
