Mitutoyo 137-209 Tubular Vernier Inside Micrometer Instruction Manual

1. Уводзіны

This manual provides instructions for the proper use and maintenance of the Mitutoyo 137 Series Tubular Vernier Inside Micrometer, Model 137-209. This precision instrument is designed for accurately measuring the inside dimensions (ID) of cylinders, rings, and parallel surfaces. It features a vernier scale for precise metric measurements, a satin chrome finish for durability, and carbide-tipped measuring faces for wear resistance. The micrometer head has a 13mm travel for fine positioning, and a locking clamp secures measurements.

The 137-209 model includes a set of extension rods, allowing for a diversified range of measurements from 50mm to 1000mm. Proper understanding and adherence to these instructions will ensure accurate measurements and extend the lifespan of your instrument.

2. Кампаненты і асаблівасці

The Mitutoyo 137-209 Tubular Vernier Inside Micrometer set typically includes the following components:

• Micrometer Head: The main measuring unit with a vernier scale and thimble.
• Падаўжальнікі: Various lengths of tubular rods used to extend the measuring range.
• Anvils: Measuring faces, typically carbide-tipped for wear resistance, located at the ends of the micrometer head and extension rods.
• Блакаванне Clamp: Mechanism to secure the thimble and spindle in place after a measurement.
• Fitted Case: For safe storage and transport of the micrometer and its accessories.

Figure 1: Mitutoyo 137-209 Tubular Vernier Inside Micrometer set, including the micrometer head and various extension rods, neatly organized within its protective wooden case.

Figure 2: Individual components of the Mitutoyo 137-209 micrometer, laid out to show the micrometer head and various extension rods of different lengths, ready for assembly.

3. Настройка

3.1 Selecting Extension Rods

To achieve the desired measuring range, select the appropriate extension rods. The total length of the assembled rods plus the micrometer head determines the overall measuring capacity. Ensure the combined length is slightly less than the dimension to be measured to allow for micrometer head adjustment.

3.2 Зборка

1. Clean all connecting surfaces of the micrometer head and extension rods with a lint-free cloth.
2. Carefully screw the selected extension rod(s) onto the micrometer head. Ensure a firm, but not overtightened, connection to prevent damage and maintain accuracy.
3. For multiple extension rods, connect them sequentially, ensuring each connection is secure.

3.3 Устаноўка нуля

After assembly, it is crucial to perform a zero-setting.

• Retract the micrometer spindle fully until the measuring faces are closed (or at their minimum extension for the assembled length).
• Check if the zero mark on the thimble aligns precisely with the datum line on the sleeve.
• If misalignment occurs, use the provided wrench to adjust the sleeve until the zero mark aligns. Refer to the specific instructions for your micrometer head model for detailed adjustment procedures.

4. Інструкцыя па эксплуатацыі

4.1 Вымярэнне

1. Ensure the measuring faces are clean and free from dust or debris.
2. Position the micrometer within the internal dimension to be measured.
3. Slowly rotate the thimble to extend the spindle until both carbide-tipped measuring faces make light, firm contact with the internal surfaces of the workpiece. The 13mm travel of the micrometer head allows for fine adjustment.
4. For consistent pressure, use the ratchet stop or friction thimble (if equipped) to apply uniform measuring force.
5. Engage the locking clamp to secure the spindle position, preventing accidental movement while reading.

4.2 Reading the Vernier Scale

The Mitutoyo 137-209 uses a vernier scale for precise readings to 0.01mm.

• Main Scale (Sleeve): Read the largest whole millimeter value visible on the sleeve.
• Thimble Scale: Read the hundredths of a millimeter from the thimble scale, where its mark aligns with the datum line on the sleeve.
• Total Measurement: Add the initial length of the assembled extension rods (if any) to the reading obtained from the micrometer head.

Exampль: If the main scale reads 50mm, and the thimble scale reads 0.25mm, the micrometer head reading is 50.25mm. If an extension rod of 100mm was used, the total measurement would be 150.25mm.

5. Тэхнічнае абслугоўванне

5.1 Ачыстка

• After each use, wipe all surfaces, especially the measuring faces and scale, with a clean, lint-free cloth.
• For stubborn grime, use a small amount of instrument cleaning fluid on a cloth. Avoid harsh solvents that may damage the finish or markings.
• Ensure no dust or debris accumulates on the spindle screw threads.

5.2 Захоўванне

• Store the micrometer and its extension rods in the provided fitted case when not in use.
• Keep the instrument in a dry environment, away from direct sunlight, extreme temperatures, and corrosive substances.
• Slightly open the measuring faces before storage to relieve tension on the spindle.

5.3 Каліброўка

Regular calibration is essential to maintain the accuracy of your micrometer.

• Periodically check the zero-setting as described in Section 3.3.
• For comprehensive accuracy checks, it is recommended to have the instrument professionally calibrated by a qualified technician at regular intervals, especially if used in critical applications.

6. Выпраўленне непаладак

6.1 Недакладныя паказанні

• Нулявая памылка: Re-check and adjust the zero-setting as per Section 3.3.
• Няправільная тэхніка: Ensure consistent measuring force is applied and the micrometer is held squarely to the workpiece. Avoid tilting.
• Забруджванне: Clean measuring faces and workpiece surfaces thoroughly.
• Насіць: If measuring faces or spindle threads show significant wear, professional service or replacement may be required.

6.2 Difficulty Rotating Thimble

• Блакаванне Clamp Заручаны: Пераканайцеся, што фіксатар клamp is disengaged before attempting to rotate the thimble.
• Dirt/Debris: Clean the spindle threads and thimble area.
• пашкоджанне: If resistance persists, do not force rotation. The instrument may require professional inspection.

7. Тэхнічныя характарыстыкі

8. Гарантыя і падтрымка

For information regarding product warranty, technical support, or service, please contact Mitutoyo America Corporation directly or visit their official webсайт. Захоўвайце чэк аб куплі як пацверджанне пакупкі.

Mitutoyo America Corporation:
Webсайт: www.mitutoyo.com
(Звярніцеся да website for current contact information and service locations.)