SP INDUSTRIES 07470675SP.TH Soda Lime Glass Disc 6.75 0.500

( Brand: Sp Industries ), ( Manufacturer Part Number: 07470675SP.TH )

Review SP INDUSTRIES 6.75 Inch Soda lime Glass Disc 0.500 Thick New Surplus

The **SP 07470675SP.Th 6.75" Soda-Lime Glass Disc (0.500" Thickness)** is a precision-engineered optical flat designed for high-accuracy applications in scientific, industrial, and laboratory settings. Crafted from **soda-lime glass**, a durable and cost-effective material known for its excellent optical clarity and mechanical stability, this disc offers a reliable surface for testing, alignment, and calibration tasks. With a **diameter of 6.75 inches (171.45 mm)**, it provides a generous working area, making it ideal for use in optical systems, interferometry, and precision metrology where large, flat surfaces are required. The **0.500-inch (12.7 mm) thickness** ensures structural rigidity, minimizing warping or deflection under moderate loads, while its polished finish delivers a smooth, reflective surface with minimal surface irregularities critical for accurate optical measurements.

This glass disc is particularly well-suited for applications such as **Fizeau interferometry, autocollimation testing, and optical component alignment**, where parallelism and flatness are essential. Its **soda-lime composition** balances affordability with performance, offering superior resistance to thermal shock compared to other glass types while maintaining transparency across a broad spectrum of visible light. The disc s **high-quality polishing** ensures minimal surface defects, reducing scattering and enhancing the precision of optical tests. Whether used in quality control for lenses, mirrors, or other optical elements, or as a reference surface in laboratory experiments, this disc delivers consistent, reliable performance for demanding applications.

For users requiring additional durability or resistance to chemical exposure, this soda-lime glass disc can be paired with protective coatings or handled with appropriate care to extend its lifespan. Its **standardized dimensions** make it easily interchangeable with other optical components in existing setups, while its **flatness specifications** (typically within /10 or better at 632.8 nm, depending on the manufacturer s tolerances) ensure it meets or exceeds industry standards for precision optical work. Whether in research, manufacturing, or educational environments, this disc serves as an indispensable tool for achieving accurate, repeatable results in optical measurements and alignments.

### **Analysis of Buying SP 07470675SP.TH 6.75 Soda-Lime Glass Disc (0.500 mm Thickness)**

#### **Pros**

1. **High Optical Clarity** Soda-lime glass is known for its excellent transparency, making it suitable for optical applications where clarity is critical.

2. **Cost-Effective** Compared to specialty glasses (e.g., borosilicate, fused silica), soda-lime is generally more affordable, reducing material costs.

3. **Good Mechanical Strength** While not as durable as tempered or borosilicate glass, it offers reasonable resistance to thermal and mechanical stress for many applications.

4. **Widely Available** Being a standard glass type, sourcing is easier, and suppliers often stock it in various sizes and thicknesses.

5. **Compatibility with Common Processing** It can be easily cut, polished, and coated using standard glassworking techniques.

6. **Low Thermal Expansion** Compared to some other common glasses, it has a moderate coefficient of thermal expansion, reducing warping risks in moderate temperature changes.

7. **Standardized Specifications** The part number (SP 07470675SP.TH) suggests it is a precision-machined disc, likely with tight tolerances, ensuring consistency in dimensions.

8. **Versatile Applications** Suitable for optical filters, lenses, windows, and protective covers where high transparency is required but extreme durability is not.

#### **Cons**

1. **Lower Chemical Resistance** Soda-lime glass is more susceptible to etching and dissolution in acidic or alkaline environments compared to borosilicate or fused silica.

2. **Limited Temperature Resistance** It has a lower softening point ( 650 C) and is not ideal for high-temperature applications where thermal shock or deformation could occur.

3. **Higher Coefficient of Thermal Expansion (CTE)** Compared to borosilicate or fused silica, it may be more prone to cracking if subjected to rapid temperature changes.

4. **Potential for Surface Contaminants** If not properly cleaned or stored, soda-lime glass can absorb moisture or dust, affecting optical performance.

5. **Durability Limitations** While adequate for many uses, it is not as scratch-resistant or impact-resistant as tempered or reinforced glass types.

6. **Potential for Internal Stress** If not annealed properly during manufacturing, residual stress could lead to cracking or distortion over time.

7. **UV Absorption** Soda-lime glass may absorb some UV light, which could be a drawback for applications requiring high UV transparency (though this is often mitigated with coatings).

8. **Limited Long-Term Stability** Over extended periods, especially in humid or chemically aggressive environments, it may degrade more than other glass types.

---

### **Ending Conclusion**

The **SP 07470675SP.TH 6.75 soda-lime glass disc (0.500 mm)** is a practical choice for applications where **cost-effectiveness, optical clarity, and moderate durability** are prioritized over extreme chemical resistance or high-temperature performance. It is well-suited for **optical components, laboratory equipment, protective windows, or general-purpose glass applications** where the glass will not be exposed to harsh chemicals, extreme temperatures, or mechanical abuse.

However, if the application involves **high-temperature environments, chemical exposure, or demanding mechanical stress**, alternative materials such as **borosilicate (e.g., Pyrex), fused silica, or tempered glass** would be more appropriate. Additionally, if UV transparency is critical, a UV-grade soda-lime or coated glass may be necessary.

---

### **Recommendation**

- You need a **cost-effective, optically clear** solution for general-purpose applications.

- The environment is **not chemically aggressive** (e.g., no strong acids or alkalis).

- Temperature fluctuations are **moderate** (avoid rapid thermal cycling).

- You require **standardized, precision-machined** glass with tight tolerances.

- The application demands **high chemical resistance** (e.g., laboratory glassware exposed to strong reagents).

- **High-temperature stability** is required (e.g., furnace windows, high-heat optical components).

- **Mechanical durability** is critical (e.g., protective shields for industrial use).

- **UV transparency** is essential without additional coatings.

- For **chemical resistance**, opt for **borosilicate glass** (e.g., Schott Borosilicate 3.3).

- For **high-temperature applications**, consider **fused silica or ceramic glass**.

- For **scratch resistance**, explore **tempered or coated glass variants**.

If the intended use aligns with the glass s strengths, this is a **reliable and economical purchase**. Otherwise, a more specialized glass type may be warranted. Always verify supplier quality control and certifications to ensure the disc meets your exact specifications.

Details:

SP Industries 07470675SP.TH 6.75 Soda-Lime Glass Disc 0.500 Thick New Surplus. Thickness Range: 0.470 to 0.510. Premium PLC BUYS ALL TYPES OF NEW AND USED INDUSTRIAL AUTOMATION MRO SURPLUS. Diameter: 6.75.

Composition: Soda-Lime Glass. Condition: Status: New Surplus. Manufacturer: SP Industries, Scientific Products Division. Technical Specifications: Part Number: 07470675SP.TH.

Details: Pristine surface with no chips, cracks, or scratches. Packaging: This item is unused and has been kept in a secure industrial parts environment.

part #: 07470675spth price

• $125.00

specifications plasticwarelabsuppy:

• brand: Sp Industries
• mpn: 07470675sp.th

seller plasticwarelabsuppy:

• city: Utica, Michigan
• rating: 99.9%
• # reviews: 23295

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offer plasticwarelabsuppy:

• started: April 3, 2026
• quantity: 1
• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock

general plasticwarelabsuppy:

• condition: New Open box
• Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware

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• carrier: UPS, USPS
• service: UPS Ground, USPS Priority Mail, UPS Next Day Air, UPS 2nd Day Air
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