10 1/2-4 STUB ACME-2G PLUG GAGE

10 1/2-4 STUB ACME-2G PLUG GAGE PER ASME B1.8 made in China by Sowant Precision Gage

Introduction to STUB ACME Thread Gauges: A Focus on 10 1/2-4 Stub Acme Thread Plug and Ring Gauges

1. Overview of STUB ACME Threads

STUB ACME threads, standardized under ASME B1.8, are a specialized variant of the 29° trapezoidal Acme thread profile. Designed for applications with space constraints, these threads feature a shorter tooth height and a higher number of threads per inch (TPI) compared to standard Acme threads. The "stub" designation reflects their reduced depth, making them ideal for scenarios requiring compact yet robust mechanical motion, such as in aerospace, heavy machinery, and precision instrumentation.

The designation 10 1/2-4 STUB ACME specifies:

• Major diameter: 10.5 inches.

• Threads per inch (TPI): 4.

• Tolerance class: Typically 2G (general purpose), though higher precision grades (e.g., 3G) are available for critical applications.

2. Key Features of STUB ACME Gauges

Material Composition

STUB ACME thread gauges, including plug and ring gauges, are manufactured from high-wear-resistant materials to ensure longevity and accuracy. Common materials include:

• Tool steel (e.g., bearing steel): Offers a balance of hardness and machinability, suitable for standard industrial use.

• Carbide (hard alloy): Preferred for high-volume production environments due to exceptional wear resistance and extended service life.

Service Life

The lifespan of STUB ACME gauges depends on material choice and application conditions. Carbide gauges typically outperform steel counterparts in abrasive environments, such as oilfield machinery or automotive assembly lines, where frequent use demands minimal dimensional drift.

Precision and Tolerance

• ASME B1.8 Compliance: Ensures dimensional conformity, including thread angle (29°), pitch, and major/minor diameter tolerances.

• Tolerance Classes:

  • 2G: General-purpose tolerance, suitable for most commercial applications.

  • 3G/4G: Higher precision for critical systems like aerospace actuators or medical devices.

• Metrological Certification: Gauges are calibrated to national or international standards, ensuring traceability for quality assurance.

Application Scenarios

STUB ACME threads excel in:

• Space-constrained mechanisms: Elevator systems, compact actuators.

• High-load, low-friction systems: CNC machinery, hydraulic valves.

• Corrosive environments: Oilfield equipment (e.g., API connectors) when paired with corrosion-resistant coatings.

3. Sowant Precision Gage: Expertise in Thread Gauge Manufacturing

Sowant Precision Gage Co., Ltd., based in Suzhou, China, specializes in producing high-precision thread gauges, including:

• ACME and STUB ACME Gauges: Customizable to non-standard diameters and TPI requirements.

• HBPV Thread Gauges: For high-pressure sealing applications.

• Large-Scale Thread Gauges: Up to 2+ inches in diameter, tailored for heavy industrial use.

The company also serves as an authorized distributor for leading global brands:

• Mitutoyo (Japan): Precision measuring tools and CNC-compatible gauges.

• INSIZE (Global): Dimensional inspection instruments.

4. Conclusion

The 10 1/2-4 STUB ACME thread plug and ring gauges exemplify precision engineering tailored for demanding applications. With ASME B1.8 compliance, material versatility, and adaptable tolerance grades, these gauges address both industrial and specialized needs. Sowant Precision Gage further enhances accessibility through its robust production capabilities and partnerships with industry-leading brands, ensuring reliability across sectors from aerospace to energy.

For detailed specifications or custom gauge solutions, refer to ASME B1.8-1988(R2021) standards or contact Sowant Precision Gage directly.

References

• ASME B1.8 standards and STUB ACME thread specifications.

• Material and application insights from industrial gauge manufacturers.

• Sowant Precision Gage’s product portfolio and certifications.