Product name: Shimadzu Option Parts AXIAL MB 1 ASSY 3304 (Axial Magnet Bearing (1) Assembly)
Compatible models: TMP-3304 series (also used in TMP-2804 ~ TMP-3304 series as original parts repair)
Short description
The AXIAL MB 1 ASSY 3304 is the factory original axial magnet bearing assembly supplied as an option/repair component for Shimadzu TMP series molecular pumps. It restores the axial magnetic suspension and bearing function that supports the rotor and maintains axial position under high-speed operation. This assembly is intended for use in TMP-2804 through TMP-3304 models and is supplied as an OEM-quality replacement to ensure factory tolerances, balance, and long-term reliability.
Key features
- OEM original repair part manufactured to Shimadzu specification for TMP-3304 series.
- Precise axial magnetic bearing assembly to maintain rotor axial position and reduce mechanical contact.
- Constructed from corrosion-resistant and vacuum-compatible materials (stainless steel structural components, engineered magnetic elements and vacuum-rated insulators).
- Supplied as a complete assembly for straightforward replacement — no need to source individual subcomponents.
- Tested to meet balance and vacuum performance requirements of TMP high-speed molecular pumps.
Compatibility and application
This assembly is intended for the TMP-3304 series and is compatible with the TMP-2804 through TMP-3304 family when used as an original parts repair. Before ordering, confirm your pump model and serial number to ensure correct match. For OEM spare parts and related non-standard maintenance components, see Shimadzu molecular pump non-standard maintenance parts.
Typical materials and construction
- Magnetic elements: engineered permanent magnet assembly chosen for stable axial positioning under high-speed conditions.
- Structural components: vacuum-compatible stainless steel and precision-machined housings.
- Insulators and seals: vacuum-rated ceramics or polymers as required by the original design.
- Bearing surfaces: designed to minimize wear and promote stable magnetic suspension; replaced as a full assembly to guarantee alignment.
Installation overview (recommended practices)
- Only qualified service personnel should perform replacement. Refer to the pump service manual for detailed torque specs and alignment procedures.
- Work in a clean, oil-free environment. Use lint-free gloves to avoid contamination of vacuum surfaces.
- Prior to installation, inspect surrounding components (rotor, radial bearings, seals) and clean the mating surfaces.
- Install the AXIAL MB 1 ASSY per Shimadzu instructions, confirm axial clearance and sensor alignment, then perform static and dynamic checks before returning the pump to service.
- After assembly, run the pump through a controlled break-in and perform a full leak and performance test to verify vacuum level, vibration, current draw, and temperature.
Signs you may need to replace the axial magnet bearing assembly
- Increased axial vibration or abnormal noise during pump operation.
- Difficulty achieving rated ultimate vacuum or repeatable rise in base pressure.
- Higher than normal motor current or elevated rotor temperature.
- Frequent trips of protection circuits related to axial position or imbalance.
If you observe any of these symptoms, consult a qualified service technician and consider replacement with the OEM AXIAL MB 1 ASSY 3304 for best results. For repair and replacement parts options, visit Shimadzu molecular pump non-standard maintenance parts.
Maintenance and storage
- Store the assembly in a clean, dry environment away from strong magnetic fields and corrosive chemicals.
- Handle with care to avoid shock or dropping — magnetic elements and precision surfaces can be damaged by impact.
- Inspect for contamination or mechanical damage during scheduled maintenance intervals; replace as required rather than attempting field rework on the magnetic/bearing surfaces.
- Follow the pump manufacturer’s recommended maintenance schedule for bearings and rotor inspections (typical intervals depend on duty cycle and operating conditions).
Ordering, warranty and packaging
AXIAL MB 1 ASSY 3304 is supplied as a boxed OEM assembly with protective packaging to prevent contamination or mechanical damage in transit. Confirm the pump model and serial number when ordering. OEM parts normally carry the supplier’s limited warranty for manufacturing defects — consult your vendor for specific warranty terms. For purchasing and availability of original spare parts and repair kits, see our parts listing: Shimadzu molecular pump non-standard maintenance parts.
Troubleshooting quick guide
- Noise or vibration: verify rotor balance, radial bearings condition and axial sensor feedback. Replace the axial assembly if axial instability persists.
- Poor vacuum: perform vacuum leak check and inspect seals; if mechanical symptoms point to axial control failure, replace the assembly.
- Frequent trips or alarms: capture diagnostics from the pump controller and consult service manual; axial bearing faults often show axial position warnings.
Need assistance?
For technical questions, compatibility confirmation, or to order the AXIAL MB 1 ASSY 3304, contact your authorized Shimadzu service provider or parts distributor. If you require related non-standard maintenance components or a full repair kit for TMP models, see our parts page for details: Shimadzu molecular pump non-standard maintenance parts.
