Question
Download Solution PDFBearings are generally made of ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Gunmetal
- Gunmetal is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc.
- It was used mainly for making guns and bullets. Now it is superseded by Steel.
- It is generally used in the manufacture of bearings for machine construction, and for this purpose must be capable of resisting hard wear, must be easy to turn, file, and work, and must possess great strength.
- Gunmetal is used extensively for making heavy machinery parts as it can withstand high pressure and is corrosion resistant.
Important Points
- The chrome steel is used for balls, rollers and races for bearings.
- An alloy is a substance made by melting two or more elements together, at least one of the metal.
| Name of the alloy | Made up of |
| Brass | Copper and Zinc |
| Bronze | Copper and Tin |
| Solder | Lead and Tin |
| Stainless steel | Iron, chromium, Nickle, Carbon |
| Gunmetal | Copper, Tin, Zinc, lead |
| German Silver | Copper, Zinc, and Nickle |
| Nickel Steel | Iron and Nickel |
Last updated on Jul 17, 2025
-> The Railway Recruitment Board has scheduled the RRB ALP Computer-based exam for 15th July 2025. Candidates can check out the Exam schedule PDF in the article.
-> RRB has also postponed the examination of the RRB ALP CBAT Exam of Ranchi (Venue Code 33998 – iCube Digital Zone, Ranchi) due to some technical issues.
-> UGC NET Result Date 2025 Out at ugcnet.nta.ac.in
-> UPPSC RO ARO Admit Card 2025 has been released today on 17th July 2025
-> Rajasthan Police SI Vacancy 2025 has been released on 17th July 2025
-> HSSC CET Admit Card 2025 has been released @hssc.gov.in
-> There are total number of 45449 Applications received for RRB Ranchi against CEN No. 01/2024 (ALP).
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here
-> Bihar Police Driver Vacancy 2025 has been released @csbc.bihar.gov.in.