Praktik kerja bangku #Part 1

Summary

This video provides an insightful guide on bench work techniques and safety practices. It begins with essential safety precautions like wearing work clothes and shoes, followed by an introduction to measuring tools, specifically the Vernier caliper. The script explains its parts, uses, and how to read measurements accurately. Additionally, it covers the types and uses of various files for smoothing and shaping workpieces, and provides step-by-step instructions for proper filing techniques. This tutorial is ideal for beginners learning the basics of bench work in a practical setting.

Takeaways

• 😀 Work safety is crucial in bench work practice, including wearing proper protective gear like work clothes and shoes to prevent injuries from sharp objects.
• 😀 The vernier caliper is an essential tool in bench work, used for measuring outer diameter, inner diameter, and depth of objects.
• 😀 Vernier calipers consist of two key parts: a fixed jaw and a sliding jaw, which are used to measure different aspects of an object.
• 😀 The measuring process involves reading two scales on the vernier caliper: the main scale and the nonius scale, with the nonius scale being divided into 0.05mm increments.
• 😀 The proper technique for using the vernier caliper includes locking the sliding jaw after measuring to prevent shifting and ensuring accurate readings.
• 😀 Various hand tools, such as files, are used in the bench work process for smoothing surfaces and shaping objects to the desired precision.
• 😀 Files come in different types based on their roughness, such as rough (bastard), medium (second), and fine (smooth), each suited for different stages of work.
• 😀 Files also have various shapes, including flat, triangular, semicircular, square, and circular, for working on different object types and angles.
• 😀 Proper file usage involves positioning your hands correctly: the right hand should hold the file near the head, and the left hand should support the end of the file.
• 😀 Correct posture while filing is essential: the left foot should be forward for support, and the right foot should be positioned behind to maintain balance and control.

Q & A

What is the primary safety equipment required for bench work?

The primary safety equipment for bench work includes wearing protective clothing such as a wearpack or work clothes, and safety shoes to protect against sharp objects and potential injuries.

What is the first task to be performed in bench work practice?

The first task in bench work practice involves creating or making semi-finished products, which are then processed in the machining process.

What measuring tools are commonly used in bench work?

The most common measuring tool in bench work is the vernier caliper, which is used to measure outer and inner diameters, as well as depth diameters of an object.

How is a vernier caliper used to measure an object’s outer diameter?

To measure the outer diameter, the sliding jaw of the vernier caliper is placed around the object. The jaw is then adjusted to fit the object, and the position is locked to ensure an accurate measurement.

What are the key parts of a vernier caliper, and what are their functions?

The main parts of a vernier caliper are the fixed jaw, sliding jaw, and tail. The fixed and sliding jaws are used to measure outer and inner diameters, while the tail is used for measuring depth.

How is the measurement value read from a vernier caliper?

To read the measurement, first, observe the main scale for its reading, then check the nonius scale for the additional value that aligns with the main scale for a precise measurement.

What are the types of files used in bench work, and how do they differ?

There are rough (bastard), medium (smooth), and fine (antique) files. The main difference lies in the roughness of the surface they create, with rough files being the coarsest and fine files being the smoothest.

What is the purpose of using a file in bench work?

A file is used to smooth and shape the surface of a workpiece to the desired level of finish. It is particularly useful for achieving precise dimensions and smooth surfaces on metal objects.

How do you select the right vise for bench work?

To select the right vise, the height should be adjusted so that when you use the tools, your elbow is at a comfortable level with the vise. This ensures maximum efficiency and proper ergonomics while working.

What is the correct technique for using a file in bench work?

When using a file, hold the file with your right hand on the handle and your left hand on the tip. Ensure that your feet are positioned to stabilize your body, with the left foot forward and the right foot behind, and move the file in a smooth, consistent motion.