MDC SBLM-133-4 Linear Motion Feedthrough Conflat CF133 CF275

( Brand: Mdc ), ( Manufacturer Part Number: SBLM-133-4 ), ( Type: Vacuum ), ( Unit Type: Unit )

Review MDC Linear Motion Feedthrough Conflat

The **MDC SBLM-133-4 Linear Motion Feedthrough (CF133 to CF275 Conflat Flange)** is a high-performance, precision-engineered component designed for demanding vacuum and cleanroom applications where reliable linear motion is critical. This feedthrough combines the robustness of Conflat flanges with the smooth, repeatable movement of a linear actuator, making it an ideal solution for systems requiring precise positioning, such as semiconductor manufacturing, scientific research, or advanced optics. Constructed from high-quality stainless steel (typically 304 or 316 grade), the feedthrough ensures corrosion resistance and durability in harsh environments, while its CF133 (1.33-inch) female flange on one end and CF275 (2.75-inch) male flange on the other allows for seamless integration into existing vacuum chambers or systems with varying flange sizes. The internal linear motion mechanism features a low-friction, ball-bearing or linear guide system, providing smooth, jitter-free movement with minimal backlash, which is essential for applications requiring sub-micron precision. The feedthrough is designed to maintain an ultra-high vacuum (UHV) or high vacuum (HV) seal, with a metal-to-metal or elastomer sealing interface that prevents gas leakage while accommodating the linear travel range typically ranging from a few millimeters to several centimeters, depending on the specific configuration. Its modular design allows for easy installation and removal, reducing downtime during maintenance or system upgrades. Additionally, the feedthrough is often equipped with a protective coating or passivation treatment to enhance resistance to contamination and extend operational lifespan. Whether used for sample manipulation, optical alignment, or automated stage positioning, the MDC SBLM-133-4 delivers a reliable, vacuum-compatible solution that balances precision, durability, and ease of integration into complex experimental or industrial setups.

### **Pros and Cons of buying a MDC SBLM-133-4 Linear Motion Feedthrough (CF133/CF275 Conflat)**

1. **High Vacuum Compatibility** The Conflat (CF) flange design ensures reliable sealing in high-vacuum applications, making it suitable for scientific, industrial, or research environments where leak-tight performance is critical.

2. **Precision Linear Motion** The feedthrough is designed for smooth, controlled linear movement, which is essential for applications requiring precise positioning, such as spectroscopy, semiconductor manufacturing, or vacuum chamber adjustments.

3. **Durability and Reliability** MDC (Manufacturing Design Corporation) is a well-established manufacturer known for producing high-quality vacuum components. This feedthrough is likely built to withstand repeated use without significant wear.

4. **Compatibility with CF Flanges** The CF133 and CF275 flange sizes are industry standards, meaning it can be easily integrated into existing vacuum systems without compatibility issues.

5. **Minimal Backlash** The linear motion mechanism is likely designed to reduce backlash, ensuring accurate and repeatable positioning.

6. **Corrosion Resistance** If constructed from stainless steel or coated materials, it will resist corrosion in humid or chemically active environments.

7. **Easy Installation and Maintenance** Conflat flanges are designed for straightforward assembly and disassembly, reducing downtime for maintenance or system upgrades.

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1. **Cost** High-quality vacuum feedthroughs, especially those with precision motion capabilities, can be expensive compared to standard vacuum fittings.

2. **Potential for Wear Over Time** Frequent linear motion could lead to gradual wear on the internal components, requiring periodic lubrication or replacement of seals.

3. **Limited Customization** This is a standard model, so if specific motion ranges or additional features (e.g., digital readouts) are needed, custom modifications may be required, adding to the cost.

4. **Maintenance Requirements** Like all mechanical components, it may require periodic cleaning, lubrication, or seal replacement to maintain optimal performance.

5. **Potential for Misalignment** If not properly installed, misalignment could lead to binding or uneven motion, affecting precision.

6. **Compatibility with Non-Standard Systems** While CF flanges are common, some legacy or non-standard systems may require additional adapters, increasing complexity.

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### **Conclusion**

The **MDC SBLM-133-4 Linear Motion Feedthrough (CF133/CF275 Conflat)** is a robust, high-performance component ideal for applications requiring precise linear movement in vacuum environments. Its reliability, compatibility with standard CF flanges, and durability make it a strong choice for scientific, industrial, and research applications where accuracy and leak-tight performance are critical.

However, its cost, potential maintenance needs, and lack of customization options may be drawbacks depending on budget constraints and specific application requirements. If the application demands high precision, vacuum integrity, and smooth motion, this feedthrough is a well-suited investment. For applications with stricter cost constraints or non-standard requirements, evaluating alternatives or consulting with a vacuum specialist may be advisable.

### **Recommendation**

If you require a **reliable, high-vacuum-compatible linear feedthrough** with **CF flange compatibility** and **precise motion control**, the **MDC SBLM-133-4** is a strong recommendation. Ensure that your system s power supply, mounting, and maintenance protocols align with the feedthrough s specifications to maximize its lifespan and performance.

For **budget-sensitive or non-standard applications**, consider whether a slightly less expensive alternative (e.g., a different manufacturer s model) or a custom solution would better fit your needs. Always verify compatibility with your existing vacuum system before purchase.

Details:

Little used MDC SBLM-133-4 linear feedthrough with 4 inches of travel and a locking screw. Lab surplus, removed from a working system. UPS, FedEx or USPS shipping in the US only.

part #: sblm1334 prices

• $445.50-$585.00

specifications valvplu:

• brand: Mdc
• mpn: Sblm-133-4
• type: Vacuum
• unit type: Unit

shipping valvplu:

• carrier: UPS
• transit: 5-11 Days
• class: Standard
• service: UPS Ground
• cost: $15.00
• type: Fixed

general valvplu:

• Pumps Pump Accessories > Vacuum Pumps > Other Vacuum Pumps
• condition: Used

returns valvplu:

• policy: No Returns

seller valvplu:

• rating: 100.0%
• # reviews: 1191
• city: Ithaca, New York

offer valvplu:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0
• started: February 12, 2026
• best offers: True

payments valvplu:

• credit card: Diners-club
• wallet: Google-pay
• other

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