{"id":2778,"date":"2018-05-24T11:10:30","date_gmt":"2018-05-24T03:10:30","guid":{"rendered":"https:\/\/gurumuda.net\/physics\/?p=2778"},"modified":"2023-08-06T14:48:10","modified_gmt":"2023-08-06T14:48:10","slug":"micrometer-screw-problems-and-solutions","status":"publish","type":"post","link":"https:\/\/gurumuda.net\/physics\/micrometer-screw-problems-and-solutions.htm","title":{"rendered":"Micrometer screw – problems and solutions","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Micrometer screw – problems and solutions<\/span><\/p>\n

1. The measurement of the diameter of the wire with a micrometer<\/a> is 2.48 mm. The image corresponding to the measurement result is…<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

Solution :<\/span><\/p>\n

A. Wire diameter = 4, …..<\/span><\/span><\/p>\n

B. Wire diameter = 3, …..<\/span><\/span><\/p>\n

C. Wire diameter = 2, …..<\/span><\/span><\/p>\n

D. Diameter of wire = 1, …..<\/span><\/span><\/p>\n

E. Wire diameter = 4, …..<\/span><\/span><\/p>\n

The correct answer is C.<\/span><\/span><\/p>\n

2. The measurement of the diameter of the wire with a micrometer is 1.95 mm. The image that matches with the measurement results is…<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

Solution :<\/span><\/p>\n

A. <\/span><\/p>\n

Main scale = 1.5 mm<\/span><\/p>\n

Swivel scale = 38 x 0.01 mm = 0.38 mm<\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy.<\/span><\/p>\n

Wire diameter = 1.5 mm + 0.38 mm = 1.88 mm.<\/span><\/p>\n

B. <\/span><\/p>\n

Main scale = 1.5 mm<\/span><\/p>\n

Swivel scale = 39 x 0.01 mm = 0.39 mm<\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/span><\/p>\n

Wire diameter = 1.5 mm + 0.39 mm = 1.89 mm<\/span><\/p>\n

C.<\/span><\/p>\n

Main scale = 1.5 mm<\/span><\/p>\n

Swivel scale = 43 x 0.01 mm = 0.43 mm<\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/span><\/p>\n

Wire diameter = 1.5 mm + 0.43 mm = 1.93 mm<\/span><\/p>\n

D.<\/span><\/p>\n

Main scale = 1.5 mm<\/span><\/p>\n

Swivel scale = 42 x 0.01 mm = 0.42 mm<\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/span><\/p>\n

Wire diameter = 1.5 mm + 0.42 mm = 1.92 mm<\/span><\/p>\n

E. <\/span><\/p>\n

Main scale = 1.5 mm<\/span><\/p>\n

Swivel scale = 45 x 0.01 mm = 0.45 mm<\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/span><\/p>\n

Wire diameter = 1.5 mm + 0.45 mm = 1.95 mm<\/span><\/p>\n

The correct answer is E.<\/span><\/span><\/p>\n

3. The result of the measurement of the diameter of the metal granule sphere by using screw micrometer is 2.75 mm. The image that matches with the measurement results is…<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

Solution :<\/span><\/p>\n

A. <\/span><\/p>\n

Main scale = 2.5 mm<\/span><\/span><\/p>\n

Swivel scale = 20 x 0.01 mm = 0.20 mm<\/span><\/span><\/p>\n

Wire diameter = 2.5 mm + 0.20 mm = 2.7 mm<\/span><\/span><\/p>\n

B. <\/span><\/p>\n

Main scale = 2.5 mm<\/span><\/span><\/p>\n

Swivel scale = 15 x 0.01 mm = 0.15 mm<\/span><\/span><\/p>\n

Wire diameter = 2.5 mm + 0.15 mm = 2.65 mm<\/span><\/span><\/p>\n

C. <\/span><\/p>\n

Main scale = 2.5 mm<\/span><\/span><\/p>\n

Swivel scale = 25 x 0.01 mm = 0.25 mm<\/span><\/span><\/p>\n

Wire diameter = 2.5 mm + 0.25 mm = 2.75 mm<\/span><\/span><\/p>\n

The correct answer is C.<\/span><\/span><\/p>\n

4. The measurement of the diameter of the steel cylinder with a screw micrometer is 4.47 mm. The correct measurement result shown in the following figure is…<\/span><\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

\"Micrometer<\/span><\/p>\n

Solution :<\/span><\/p>\n

A. <\/span><\/p>\n

Main scale = 4.5 mm<\/span><\/span><\/p>\n

Swivel scale = 47 x 0.01 mm = 0.47 mm<\/span><\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/i><\/span><\/span><\/p>\n

Wire diameter = 4.5 mm + 0.47 mm = 4.97 mm<\/span><\/span><\/p>\n

B. <\/span><\/p>\n

Main scale = 4 mm<\/span><\/span><\/p>\n

Swivel scale = 47 x 0.01 mm = 0.47 mm<\/span><\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/i><\/span><\/span><\/p>\n

Wire diameter = 4 mm + 0.47 mm = 4.47 mm<\/span><\/span><\/p>\n

C.<\/span><\/p>\n

Main scale = 5.5 mm<\/span><\/span><\/p>\n

Swivel scale = 47 x 0.01 mm = 0.47 mm<\/span><\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/i><\/span><\/span><\/p>\n

Wire diameter = 5.5 mm + 0.47 mm = 5.97 mm<\/span><\/span><\/p>\n

D. <\/span><\/p>\n

Main scale = 3 mm<\/span><\/span><\/p>\n

Swivel scale = 47 x 0.01 mm = 0.47 mm<\/span><\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/i><\/span><\/span><\/p>\n

Wire diameter = 3 mm + 0.47 mm = 3.47 mm<\/span><\/span><\/p>\n

E. <\/span><\/p>\n

Main scale = 7.5 mm<\/span><\/span><\/p>\n

Swivel scale = 47 x 0.01 mm = 0.47 mm<\/span><\/span><\/p>\n

0.01 mm is the threshold of micrometer screws accuracy<\/i><\/span><\/span><\/p>\n

Wire diameter = 7.5 mm + 0.47 mm = 7.97 mm<\/span><\/span><\/p>\n

1. Question:<\/strong> What is the primary purpose of a micrometer screw?<\/span><\/p>\n

Answer:<\/strong> The primary purpose of a micrometer screw is to measure small dimensions with high precision, typically to the nearest hundredth of a millimeter or thousandth of an inch.<\/span><\/p>\n

2. Question:<\/strong> How does a micrometer achieve its precision?<\/span><\/p>\n

Answer:<\/strong> A micrometer achieves its precision through a finely threaded screw mechanism. One complete turn of the thimble advances or retracts the spindle by a known small distance.<\/span><\/p>\n

3. Question:<\/strong> What is the ‘pitch’ of the micrometer screw?<\/span><\/p>\n

Answer:<\/strong> The pitch is the linear distance the spindle moves for one complete rotation of the screw.<\/span><\/p>\n

4. Question:<\/strong> Why do micrometers have a ratchet mechanism?<\/span><\/p>\n

Answer:<\/strong> The ratchet mechanism ensures consistent force when tightening the micrometer, preventing over-tightening and potential damage to the object being measured or the micrometer itself.<\/span><\/p>\n

5. Question:<\/strong> How is the reading on a micrometer taken?<\/span><\/p>\n

Answer:<\/strong> The reading is taken by combining the linear measurement indicated on the sleeve with the rotational measurement from the thimble scale.<\/span><\/p>\n

6. Question:<\/strong> Why is the frame of a micrometer often ‘C’ shaped?<\/span><\/p>\n

Answer:<\/strong> The ‘C’ shape provides strength and rigidity to the instrument while allowing easy access for placing and removing the object being measured.<\/span><\/p>\n

7. Question:<\/strong> What are the anvil and spindle in the context of a micrometer?<\/span><\/p>\n

Answer:<\/strong> The anvil is the stationary part against which the object is placed, and the spindle is the moving part that contacts the other side of the object being measured.<\/span><\/p>\n

8. Question:<\/strong> What precaution should be taken when storing a micrometer?<\/span><\/p>\n

Answer:<\/strong> A micrometer should be stored with the spindle slightly away from the anvil, preventing the pressure of constant contact and potential deformation. Also, storing it in a protective case prevents dust accumulation and physical damage.<\/span><\/p>\n

9. Question:<\/strong> Why is it important not to drop a micrometer?<\/span><\/p>\n

Answer:<\/strong> Dropping can damage the precision surfaces of the anvil and spindle, compromise the alignment, and adversely affect its accuracy.<\/span><\/p>\n

10. Question:<\/strong> How does temperature affect micrometer measurements?<\/span><\/p>\n

Answer:<\/strong> Metals expand with an increase in temperature. Since micrometers are often made of metal, temperature changes can affect their dimensions and, thus, the accuracy of measurements.<\/span><\/p>\n

11. Question:<\/strong> What is the function of the lock on some micrometers?<\/span><\/p>\n

Answer:<\/strong> The lock, or locking mechanism, secures the spindle in place after a measurement is taken, ensuring it doesn’t move while reading the measurement.<\/span><\/p>\n

12. Question:<\/strong> Why do some micrometers have a carbide-tipped anvil and spindle?<\/span><\/p>\n

Answer:<\/strong> Carbide tips are harder and more wear-resistant than plain steel, ensuring longer life and consistent accuracy of measurements.<\/span><\/p>\n

13. Question:<\/strong> What is the difference between a micrometer and a caliper?<\/span><\/p>\n

Answer:<\/strong> While both are measuring tools, a micrometer measures using a screw mechanism and is generally more precise. In contrast, a caliper uses a slide mechanism and can measure internal, external, and depth dimensions.<\/span><\/p>\n

14. Question:<\/strong> How is zero error accounted for in a micrometer?<\/span><\/p>\n

Answer:<\/strong> Zero error is checked by closing the micrometer without any object between the anvil and spindle. Any discrepancy from zero is noted and adjusted for in subsequent measurements.<\/span><\/p>\n

15. Question:<\/strong> Why should one avoid rotating the thimble rapidly?<\/span><\/p>\n

Answer:<\/strong> Rapid rotation can damage the threads of the micrometer screw, affecting its accuracy.<\/span><\/p>\n

16. Question:<\/strong> Why are digital micrometers considered advantageous by some users?<\/span><\/p>\n

Answer:<\/strong> Digital micrometers provide direct digital readings, eliminating potential reading errors from the analog scale, and can be quicker and more intuitive for some users.<\/span><\/p>\n

17. Question:<\/strong> What is the function of the scale on the sleeve of the micrometer?<\/span><\/p>\n

Answer:<\/strong> The scale on the sleeve indicates whole millimeters or tenths of inches (depending on the unit) and provides the main linear measurement.<\/span><\/p>\n

18. Question:<\/strong> Why is the thimble typically divided into 50 or 100 divisions?<\/span><\/p>\n

Answer:<\/strong> This division corresponds to the pitch of the screw. For a 0.5 mm pitch, each division on the thimble represents 0.01 mm. For a 0.025-inch pitch, each division would indicate 0.0005 inches.<\/span><\/p>\n

19. Question:<\/strong> How can a user measure the depth using a micrometer?<\/span><\/p>\n

Answer:<\/strong> Depth measurements typically require a depth micrometer, which has a rod extending from the base for depth measurement, as opposed to the typical outside micrometer.<\/span><\/p>\n

20. Question:<\/strong> What’s the significance of having a friction thimble on some micrometers?<\/span><\/p>\n

Answer:<\/strong> A friction thimble ensures that a consistent force is applied when taking measurements, leading to more consistent and accurate readings.<\/span><\/p>\n

Understanding the intricacies of the micrometer screw is vital for those in precision engineering and related fields where accurate measurements are essential.<\/span><\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

Micrometer screw – problems and solutions 1. The measurement of the diameter of the wire with a micrometer is 2.48 mm. The image corresponding to the measurement result is… Solution :<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"Micrometer screw - problems and solutions","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2778","post","type-post","status-publish","format-standard","hentry","category-solved-problems-in-basic-physics"],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/2778","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/comments?post=2778"}],"version-history":[{"count":2,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/2778\/revisions"}],"predecessor-version":[{"id":8548,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/posts\/2778\/revisions\/8548"}],"wp:attachment":[{"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/media?parent=2778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/categories?post=2778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gurumuda.net\/physics\/wp-json\/wp\/v2\/tags?post=2778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}