Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App Chapter 7: Problem 8
_____ is used to make holes in the metal rods.
Short Answer
Expert verified
Answer: The process of making holes in metal rods is called Drilling and it's done using a drill machine with appropriate drill bits (usually high-speed steel or cobalt drill bits).
Step by step solution
01
Identify the Process
The process of making holes in metal rods is called Drilling.
02
Tools Required
To drill holes in metal rods, you need a drill machine and appropriate drill bits. The drill machine can be a hand drill or a power drill.
03
Choose the Right Drill Bit
To drill holes in metal rods, you need to choose the drill bit suitable for the type of metal and the size of the hole you want to make. Generally, we use high-speed steel (HSS) drill bits or cobalt drill bits for drilling into metal.
04
Secure the Metal Rod
Secure the metal rod in a vise or any other clamping device to prevent it from moving while drilling. This step is crucial for safety and precision.
05
Mark the Drilling Spot
Before drilling, use a center punch or a sharp pointed tool to create a small indentation at the location where the hole needs to be made. This will guide the drill bit and help in maintaining accuracy.
06
Drilling the Hole
Set the drill bit in the drill machine. Apply some cutting oil to the drilling spot on the metal rod to reduce friction and heat. Start the drilling process by placing the tip of the drill bit in the indentation created earlier, and apply steady pressure while keeping the drill perpendicular to the surface.
07
Clear the Chips
It is essential to clear the metal chips produced during drilling and apply more cutting oil if needed. Frequently retract the drill bit to clear the chips and ensure smooth drilling.
08
Finishing the Hole
Once the hole is drilled, use a deburring tool or file to smoothen the edges of the hole. This is to remove any sharp edges or protrusions and increase safety.
Now that the student understands the process and tools used to make holes in metal rods, they can successfully drill holes in metal rods.
Unlock Step-by-Step Solutions & Ace Your Exams!
-
Full Textbook Solutions
Get detailed explanations and key concepts
-
Unlimited Al creation
Al flashcards, explanations, exams and more...
-
Ads-free access
To over 500 millions flashcards
-
Money-back guarantee
We refund you if you fail your exam.
Over 30 million students worldwide already upgrade their learning with Vaia!
Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Drill Machine
When tackling a task such as making holes in metal rods, the importance of a reliable drill machine cannot be overstated. Essentially, a drill machine is a powerful tool equipped with a cutting tool attachment or driving tool attachment, commonly a drill bit or driver bit, used for drilling holes in various materials or fastening various materials together.
The drill machine operates by rotating the drill bit at high speeds to cut into the material – in this case, a metal rod. For metalwork, you will often encounter two main types of drill machines: the hand drill, which offers portability and ease-of-use for simple tasks; and the power drill, which provides the additional torque and speed needed for more demanding jobs involving metal.
Before starting your drilling task, ensure that you understand your machine's settings and capabilities. Adjust the speed according to the material you are working with – slower speeds for harder materials like metal and faster speeds for softer materials. Always start with a lower speed to improve control and prevent the bit from overheating.
The drill machine operates by rotating the drill bit at high speeds to cut into the material – in this case, a metal rod. For metalwork, you will often encounter two main types of drill machines: the hand drill, which offers portability and ease-of-use for simple tasks; and the power drill, which provides the additional torque and speed needed for more demanding jobs involving metal.
Before starting your drilling task, ensure that you understand your machine's settings and capabilities. Adjust the speed according to the material you are working with – slower speeds for harder materials like metal and faster speeds for softer materials. Always start with a lower speed to improve control and prevent the bit from overheating.
Drill Bits
Integral to the drilling process are the drill bits, which do the actual cutting of the material. When dealing with metal rods, the choice of the drill bit is as important as the drilling technique itself. For metal, High-Speed Steel (HSS) drill bits and cobalt drill bits are commonly used because of their durability and heat resistance.
HSS drill bits are a cost-effective option for drilling into soft metals, while cobalt bits are preferable for harder metals because they contain 5-8% cobalt, which gives them their superior strength and heat resistance qualities. The size of the drill bit you choose must match the size of the hole you wish to create. Furthermore, the bit's tip angle – typically 118 degrees for general purposes or 135 degrees for harder materials – plays a crucial role in the ease of penetration and the quality of the hole.
Selecting the correct drill bit not only ensures that the drilling operation goes smoothly but also prolongs the life of your bits and helps prevent damage to the workpiece.
HSS drill bits are a cost-effective option for drilling into soft metals, while cobalt bits are preferable for harder metals because they contain 5-8% cobalt, which gives them their superior strength and heat resistance qualities. The size of the drill bit you choose must match the size of the hole you wish to create. Furthermore, the bit's tip angle – typically 118 degrees for general purposes or 135 degrees for harder materials – plays a crucial role in the ease of penetration and the quality of the hole.
Selecting the correct drill bit not only ensures that the drilling operation goes smoothly but also prolongs the life of your bits and helps prevent damage to the workpiece.
Metalworking Safety
Safety is the paramount concern when working with metals and operating heavy machinery like drill machines. To ensure a safe environment, always wear protective gear, such as safety goggles to protect your eyes from metal shavings and chips, gloves to prevent cuts or abrasions, and hearing protection if operating loud equipment.
Securing the metal rod properly in a vise or clamp is critical to prevent it from turning or getting caught on the drill bit, which can lead to injuries or damage. Moreover, using cutting oil can reduce the friction and the production of heat, lessening the chances of the drill bit breaking or causing burns.
Always be mindful to clear away metal chips and shavings frequently. These can not only dull your drill bit but can become hazardous if they get too hot or accumulate. Lastly, after the drilling operation, deburr the hole to eliminate any sharp edges, making the finished product safe to handle. These safety practices protect not only the worker but also the integrity of the material and the tools being used.
Securing the metal rod properly in a vise or clamp is critical to prevent it from turning or getting caught on the drill bit, which can lead to injuries or damage. Moreover, using cutting oil can reduce the friction and the production of heat, lessening the chances of the drill bit breaking or causing burns.
Always be mindful to clear away metal chips and shavings frequently. These can not only dull your drill bit but can become hazardous if they get too hot or accumulate. Lastly, after the drilling operation, deburr the hole to eliminate any sharp edges, making the finished product safe to handle. These safety practices protect not only the worker but also the integrity of the material and the tools being used.
