OEM 67799A MX100TP Replacement Rotary Feedthrough Solution

Product Overview

OEM 67799A MX100TP Replacement Rotary Feedthrough Solution: Seamless Transition & Legacy System Compatibility

When your vacuum process system relies on the OEM 67799A or MX100TP solid shaft rotary feedthrough and the original unit reaches end-of-life, sourcing a verified drop-in replacement becomes a critical path item. Unplanned downtime in thin-film deposition, semiconductor processing, solar cell manufacturing, or industrial vacuum coating lines is costly — often measured in thousands of dollars per hour. This replacement solution for the 67799A / MX100TP (also cross-referenced as 142353K, 1101006401, and 2008A) is engineered to restore full mechanical and vacuum performance without requiring system redesign, re-qualification, or extended maintenance windows.

The 67799A MX100TP is a solid shaft rotary feedthrough designed for high-vacuum and ultra-high-vacuum (UHV) chamber applications. It provides continuous rotary motion transmission through a vacuum boundary, maintaining leak-tight integrity at operating pressures typically ranging from 10⁻⁶ to 10⁻⁹ Torr. The solid shaft design eliminates hollow-shaft complexity, making it a preferred choice for substrate rotation, sample manipulation, valve actuation, and target drive mechanisms inside process chambers.

Upgrading from a worn or discontinued 67799A unit does not require chamber modification. The replacement maintains the same bolt-circle pattern, shaft diameter, flange standard (typically CF or KF/ISO-K depending on configuration), and rotational torque rating as the original OEM specification. Engineers migrating from aging MX100TP assemblies can retain existing drive motor couplings, bellows assemblies, and chamber port adapters without alteration. This is particularly important in multi-chamber cluster tools where port geometry is fixed and re-machining is not an option.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful rotary feedthrough replacement rarely involves a single component in isolation. In practice, maintenance engineers and process technicians upgrading from a failed or end-of-life 67799A / MX100TP unit will typically assess the surrounding vacuum motion assembly at the same time. The rotary feedthrough interfaces directly with the drive motor or stepper motor assembly on the atmosphere side, and with the substrate carrier, target drive shaft, or valve stem on the vacuum side. If the existing flexible bellows coupling or rigid shaft coupling shows wear, replacing it alongside the feedthrough prevents a secondary failure within the same maintenance window.

On the vacuum side, the chamber port O-ring or CF copper gasket should be inspected and replaced as a matter of course. Reusing a compressed or deformed gasket after feedthrough removal is a common source of post-maintenance virtual leaks that are difficult to trace. Similarly, if the system uses a KF clamp assembly with a centering ring and O-ring, these consumables should be renewed at the same time as the feedthrough swap.

For systems where the 67799A drives a substrate rotation mechanism, the rotary motion chain typically includes a stepper motor, a flexible bellows coupling, the feedthrough itself, and an internal shaft extension or spider arm inside the chamber. If the internal shaft extension shows signs of corrosion or process contamination, it should be cleaned or replaced before the new feedthrough is installed. In thin-film PVD systems, sputtered material can accumulate on internal rotating components and cause imbalance or binding that shortens feedthrough service life.

In multi-axis vacuum systems — such as those using both rotary and linear motion feedthroughs — the MX100TP rotary unit often operates alongside a linear motion feedthrough (bellows-sealed or magnetically coupled) for Z-axis or XY translation. Inspecting the linear feedthrough seals and magnetic coupling integrity during the same maintenance event reduces total system downtime. Magnetic rotary feedthroughs, which use ferrofluid sealing rather than mechanical contact, are sometimes used as an upgrade path from the solid shaft MX100TP design in applications where zero-friction, zero-wear operation is prioritized.

Electrical feedthroughs mounted on adjacent ports — such as thermocouple feedthroughs, power feedthroughs, or multi-pin signal feedthroughs — should also be leak-checked after any mechanical work on the chamber. Vibration from feedthrough removal and reinstallation can disturb adjacent flange seals, particularly on older chambers where flange faces may have minor surface irregularities.

For process engineers managing a fleet of vacuum tools, maintaining a small buffer stock of 67799A / MX100TP replacement units, CF copper gaskets, KF centering rings, and flexible shaft couplings significantly reduces mean time to repair (MTTR) when a feedthrough failure occurs during production. TOPNLMS supplies these components individually or as part of a coordinated replacement kit, with stock available for fast dispatch from Xiamen.

Retrofit Guidance FAQ

Q: Can I install this replacement without venting the entire chamber?
A: The feedthrough is mounted on the chamber exterior flange. In most configurations, only the affected port needs to be isolated and vented to atmosphere. Full chamber vent is not required if the port can be valved off. Consult your chamber layout before proceeding.

Q: Does the shaft diameter and keyway match the original 67799A exactly?
A: Yes. The replacement is dimensionally matched to the original OEM specification. Existing drive couplings, pulleys, and motor adapters can be reused without modification.

Q: What flange standard is used — CF, KF, or ISO-K?
A: Please confirm your chamber port standard when ordering. The 67799A / MX100TP is available in CF (ConFlat) and KF/ISO-K configurations. Specify your flange size (e.g., CF40, CF63, KF40) at the time of purchase to ensure the correct variant is shipped.

Q: Is the replacement compatible with UHV systems below 10⁻⁸ Torr?
A: Yes. The unit is rated for UHV service with a helium leak rate of ≤ 1×10⁻⁹ mbar·l/s. It is compatible with bakeout procedures up to 150°C.

Q: How do I verify the replacement is leak-tight after installation?
A: After installation and initial pump-down, perform a helium leak check on the feedthrough flange using a residual gas analyzer (RGA) or helium leak detector. Check both the flange seal and the dynamic shaft seal area. A baseline leak check before returning the system to process is strongly recommended.

Q: What is the expected service life?
A: Service life depends on rotational speed, duty cycle, process environment, and lubrication condition. Under typical substrate rotation duty cycles (1–10 RPM, intermittent), solid shaft rotary feedthroughs of this class typically achieve 2,000–10,000 operating hours before seal wear becomes measurable. Periodic inspection of the dynamic seal is recommended.

Q: Can TOPNLMS supply the replacement with expedited shipping?
A: Yes. Stock units ship from Xiamen within 1–3 business days. Express international freight options (DHL, FedEx, UPS) are available. Contact [email protected] or +86 18359293191 for lead time confirmation on your specific configuration.

Warranty Assurance

Every 67799A / MX100TP replacement unit supplied by TOPNLMS is covered by a 12-Month Warranty from the date of shipment. Prior to dispatch, each unit undergoes outgoing inspection including dimensional verification, visual inspection of sealing surfaces, and packaging integrity check to ensure the unit arrives in field-ready condition.

If a unit exhibits a manufacturing defect or fails to meet the specified leak rate under normal operating conditions within the warranty period, TOPNLMS will provide a replacement unit or issue a credit at our discretion. Warranty claims are processed promptly — typically within 3–5 business days of receiving the returned unit and fault documentation.

Our after-sales support team is reachable via email at [email protected] and by phone at +86 18359293191. We provide technical assistance for installation questions, flange configuration selection, and compatibility verification before and after purchase. For B2B customers managing multiple vacuum tools, we offer standing purchase agreements and priority stock reservation to ensure supply continuity.

All units are shipped with appropriate anti-static and moisture-barrier packaging. Export documentation, including commercial invoice, packing list, and certificate of origin (China), is provided as standard for international shipments. HS code classification and customs documentation support is available on request.

© 2026 TOPNLMS. All rights reserved.
Original Source: https://topnlms.com
Contact: [email protected] | +86 18359293191