Which hand tool is used to form internal thread in a hole?

Scrapper
Tap
Drill
Reamer

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 2 : Tap

Concept:

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Tapping:

It has been defined as a process for producing internal threads using a tool (tap) that has teeth on its periphery to cut threads in a predrilled hole.
A combined rotary and axial relative motion between tap and workpiece form threads.

Reaming:

The process of enlarging the hole is called reaming.
A reamer is a type of rotary cutting tool used in metalworking.
Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides.
There are also non-precision reamers which are used for more basic enlargement of holes or for removing burrs.

Drilling:

It is a cutting process that uses a drill bit to cut a hole of circular cross-section in solid materials.
The drill bit is usually a rotary cutting tool, often multi-point.

Scrapers:

The mechanical scraper tool is made up of old files and the cutting edge of the scraper is hardened and tempered.
They are mainly used to scrap metal surfaces by rubbing the work surface.

The following types of scrappers according to shape are commonly classified as

Flat
Hook
Triangular
Half-round

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[ alt="F1 Krupalu Madhu 07.09.20 D5" src="//storage.googleapis.com/tb-img/production/20/09/F1_Krupalu_Madhu_07.09.20_D5.png" style="width: 288px; height: 86px;">

[ alt="F1 Krupalu Madhu 07.09.20 D6" src="//storage.googleapis.com/tb-img/production/20/09/F1_Krupalu_Madhu_07.09.20_D6.png" style="width: 299px; height: 85px;">

[ alt="26 June 1" src="https://storage.googleapis.com/tb-img/production/19/08/26%20June_1.png" style="width: 170px; height: 49px;">

From the above definitions, we conclude that Reaming is performed after a hole already exists and it is done for providing a good surface finish and accuracy. So, it can be performed after drilling, boring, and counterboring but cannot be done after Tapping.

As in tapping, we create internal threads in a predrilled hole so if after tapping reaming is done then it will lead to destructions of the internal threads as the reamer flutes move across it which is not desirable.

4 views Answered 2022-09-04 04:29

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