పరిచయం
This manual provides detailed instructions for the proper use, care, and maintenance of your Mitutoyo 155-904 Telescoping Gage Set. This set is designed for accurate measurement of internal dimensions such as bores, slots, and grooves. Adhering to these instructions will ensure optimal performance and longevity of your precision instruments.
భద్రతా సమాచారం
Always handle precision measuring instruments with care to prevent damage and maintain accuracy. Observe the following safety guidelines:
- Store gages in their protective case when not in use to prevent physical damage.
- Avoid dropping or subjecting gages to impact, as this can affect calibration and accuracy.
- Do not use excessive force when operating the gages.
- Keep gages clean and free from dirt, dust, and corrosive substances.
- Wear appropriate personal protective equipment (PPE) if working in an environment that requires it.
ఉత్పత్తి ముగిసిందిview
The Mitutoyo 155-904 set includes five telescoping gages, each designed for a specific measurement range. These gages feature a spring-loaded plunger mechanism and a knurled clamp for securing measurements.

Figure 1: The five telescoping gages included in the Mitutoyo 155-904 set, displayed individually.

Figure 2: The Mitutoyo 155-904 telescoping gage set stored in its red protective case, showing the different sizes.
భాగాలు:
- Telescoping Gages (5 pieces): Each gage consists of two telescoping plungers that expand within the bore.
- Knurled Clamp: Used to lock the plungers in position after measurement.
- రక్షణ కేసు: For safe storage and transport of the gages.
సెటప్
Before using the telescoping gages, ensure they are clean and free from any debris or oil. Select the appropriate gage size for the internal dimension you intend to measure. The set covers a range from 1/2" to 6".
- Remove the desired telescoping gage from its protective case.
- Wipe down the measuring surfaces with a clean, lint-free cloth.
- Ensure the plungers move freely and smoothly.
ఆపరేటింగ్ సూచనలు
Follow these steps to accurately measure internal dimensions using the telescoping gage set:
- Select Gage: Choose the telescoping gage whose range encompasses the internal dimension to be measured.
- Compress Plungers: kn విప్పుurled clamp at the end of the handle. Gently compress the two telescoping plungers together.
- Insert into Bore: Carefully insert the compressed plungers into the bore, slot, or groove to be measured. Position the gage slightly angled.
- Expand Plungers: Release the plungers, allowing them to expand beyond the true diameter of the bore.
- Square the Gage: While holding the handle, slowly rock the gage across the diameter of the bore. As you rock it, the plungers will retract slightly until they are perfectly square to the bore walls, indicating the true diameter.
- Lock Measurement: Once the gage is square and the plungers are at their maximum extension within the bore, tighten the knurled clamp firmly to lock the plungers in place.
- Remove Gage: Carefully remove the locked gage from the bore.
- Measure with Micrometer: Use an external micrometer or caliper to measure the distance across the locked plungers. This measurement represents the internal dimension of the bore.
- Record Measurement: Note down the measured value.
Note: For consistent accuracy, ensure the micrometer or caliper used for the final measurement is also properly calibrated and handled with care.
నిర్వహణ
Proper maintenance is crucial for preserving the accuracy and lifespan of your Mitutoyo telescoping gages.
- శుభ్రపరచడం: After each use, wipe down the gages with a clean, soft cloth to remove any dirt, oil, or fingerprints. For stubborn grime, a mild solvent specifically designed for precision tools can be used, followed by thorough drying.
- సరళత: Periodically apply a thin film of light machine oil to the telescoping plungers to ensure smooth operation and prevent corrosion. Avoid over-lubrication.
- నిల్వ: Always store the gages in their original protective case in a dry, temperature-controlled environment. Avoid storing them in direct sunlight or areas with high humidity.
- తనిఖీ: Regularly inspect the gages for any signs of wear, damage, or corrosion. Check that the plungers move freely and the clamp mechanism functions correctly.
- క్రమాంకనం: While telescoping gages do not have user-adjustable calibration, their accuracy relies on the external measuring instrument (micrometer/caliper) used with them. Ensure your external measuring tools are regularly calibrated.
ట్రబుల్షూటింగ్
If you encounter issues with your telescoping gage set, consider the following common problems and solutions:
| సమస్య | సాధ్యమైన కారణం | పరిష్కారం |
|---|---|---|
| Plungers do not expand smoothly. | ధూళి, శిధిలాలు లేదా సరళత లేకపోవడం. | Clean plungers thoroughly and apply a thin film of light machine oil. |
| Inconsistent measurements. | Improper technique (not squaring the gage), worn plungers, or issues with the external measuring tool. | Review operating instructions for proper technique. Inspect plungers for wear. Verify calibration of micrometer/caliper. |
| Knurled clamp does not hold firmly. | ధరించిన clamp mechanism or internal spring issue. | cl నిర్ధారించుకోండిamp is tightened sufficiently. If problem persists, contact Mitutoyo customer support for service. |
స్పెసిఫికేషన్లు
The Mitutoyo 155-904 Telescoping Gage Set features the following specifications:
- మోడల్ సంఖ్య: 155-904
- కొలత పరిధి: 1/2" to 6" (12.7mm to 152.4mm)
- ముక్కల సంఖ్య: 5
- Gage Sizes (Approximate):
- 1/2" - 3/4"
- 3/4" - 1 1/4"
- 1 1/4" - 2 1/8"
- 2 1/8" - 3 1/2"
- 3 1/2" - 6"
- యంత్రాంగం: Spring-loaded plungers with knurled clamp.
- మెటీరియల్: Hardened steel (typical for precision gages).
- ఉత్పత్తి కొలతలు: 7.9 x 8 x 0.8 inches (packaging/set dimensions)
- బరువు: 12.16 ounces (packaging/set weight)
వారంటీ మరియు మద్దతు
Mitutoyo products are manufactured to high standards of quality and precision. For specific warranty information, please refer to the documentation included with your purchase or visit the official Mitutoyo webసైట్.
For technical assistance, service, or to inquire about replacement parts, please contact Mitutoyo customer support through their official channels. When contacting support, please have your model number (155-904) and purchase details readily available.
Mitutoyo Official Webసైట్: www.mitutoyo.com





