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Spark Plug Rod — TJTENG precision measuring instrument product photo (1/5)
  • 자동차 엔진
  • 베어링 간극 측정(BCT)

Spark Plug Rod

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Detailed Description

The SPR (Spark Plug Rod) is a dedicated precision measuring probe mounted in the spark plug hole to measure engine bearing clearance using a BCT (Bearing Clearance Tester).

After removing the spark plug, the SPR is inserted into the cylinder to set the piston's TDC (Top Dead Center). Subsequently, an air hose is connected to transmit compressed air supplied from the BCT body into the cylinder. This allows the BCT system to detect pressure changes inside the cylinder and measure the bearing clearance status.

The SPR is constructed using SKD11 material to ensure the durability and precision required for repeated mounting and measurement environments. It features specifications with a machining tolerance of ±0.01mm and a precision of ±0.003mm. The standard effective length ranges from 34 to 58mm, and the length can be adjusted depending on the applicable engine and measurement conditions.

Furthermore, it consists of an air connection, a clearance measuring head, an air coupler, and a digital gauge mounting section, operating as a single measurement system with the BCT body. A bushing is applied to the gauge mounting section to prevent damage to the gauge during the mounting process. One-line summary: The SPR is a precision probe dedicated to BCT that is mounted inside the cylinder through the spark plug hole to connect pneumatic and digital measurement systems.

This product applies the latest technology to provide high precision and reliability. It delivers stable performance even under demanding measurement conditions required in industrial environments, and features a user-friendly interface that anyone can easily use.

Key Features

  • 1. Dedicated Precision Measuring Probe for BCT
  • It mounts directly into the spark plug hole to connect the BCT body with the engine cylinder and perform bearing clearance measurements.
  • 2. Support for Engine Non-Disassembly Measurement
  • Measurements can be performed using the spark plug hole without disassembling the engine, increasing the efficiency of inspection and diagnostic operations.
  • 3. Support for TDC Setting and Measurement
  • The SPR can be inserted into the cylinder to verify the piston's TDC (Top Dead Center) before proceeding with clearance measurements.
  • 4. Precision Pneumatic Transmission Structure
  • The air hose stably transmits pneumatic pressure from the BCT body into the cylinder, supporting pressure change-based bearing clearance measurements.
  • 5. Application of SKD11 Material
  • Durability and dimensional stability are ensured by applying SKD11 material, considering repetitive mounting and measurement environments.
  • 6. High-Precision Machining
  • Manufactured with specifications of ±0.01mm machining tolerance and ±0.003mm precision, it supports stable, repeatable measurements. 7. Compatibility with Various Engine Specifications
  • Designed with a standard effective length range of 34–58 mm, the length can be adjusted depending on the applicable engine and measurement conditions.
  • 8. Diverse SPR Model Configurations
  • We offer various models, including SPR-M12, SPR-M12_L, SPR-M12_S, and SPR-M14, to match engine spark plug specifications and application conditions.
  • 9. Digital Gauge Integration Structure
  • Integration with a digital gauge allows for precise verification of the position and measurement status inside the cylinder.
  • 10. Bushings for Gauge Protection
  • Dedicated bushings are applied to the gauge mounting point to prevent damage to the gauge during the installation process.
  • 11. One-Touch Air Connection
  • Designed to allow for easy connection and disconnection of the BCT's air hose using an air coupler.
  • 12. Integrated Operation with the BCT System
  • It operates as a single engine bearing clearance measurement system by linking with the BCT main unit, digital gauge, and air system.

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