Taper shank drills are held in drill machine by using -

This question was previously asked in
ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
View all ISRO Technician B Fitter Papers >
  1. Vice
  2. Sleeve
  3. Drift
  4. Chucks

Answer (Detailed Solution Below)

Option 2 : Sleeve
Free
ISRO Technician B: Fitter Full Test 1
16.8 K Users
60 Questions 180 Marks 90 Mins

Detailed Solution

Download Solution PDF

Concept:

  • Usually, all the drilling tools have straight or tapered shanks.
  • This shank must be held in a machine spindle when machining is to be carried out.
  • To hold the drill in the spindle, proper drill heads are required.
  • Some of the tool-holding devices commonly used in a drilling machine are:
    1. Sleeve 
    2. Socket
    3. Drill chucks

Sleeve

  • When the drill shank size is smaller than the spindle of the machine, then the device used to hold the small shank drill is called Sleeve.
  • The drilling tool required to hold in the spindle is first fitted into the inner taper of the sleeve.
  • Then the sleeve along with the tool is fitted into the machine spindle.
  • This outer taper of the sleeve always matches the spindle taper.
  • The availability of different types of sleeves facilitates the use of a drilling tool with any taper corresponding to a sleeve that fits in the spindle.

Socket

  • The device used to hold the drill, when the tapered shank of the tool is larger than the spindle taper, is called a Socket.
  • The generally used socket is shown in Figure. In which, the socket taper matches the spindle taper, and the inside taper of the socket matches the spindle taper.

Drill chuck

  • For fixing and removing drills, the chucks are provided either with a pinion and key or a knurled ring.
  • Drill chucks are held on the machine spindle by means of an arbor fitted on the drill chuck.

 

Latest ISRO Technician B Fitter Updates

Last updated on May 28, 2025

-> ISRO Technician Fitter recruitment notification 2025 has been released

->Candidates can fill ISRO Fitter application form from June 2 to 16. 

->A total of 20 vacancies are announced for ISRO recruitment 2025 for Fitter.

->Candidates must have passed SSLC/ SSC/ Matriculation and should have NTC/ITI/NAC in ->Fitter Trade Certificate from an NCVT recognized by the government to satisfy the ISRO Technician B Fitter Eligibility Criteria.

Get Free Access Now
Hot Links: teen patti teen patti 500 bonus teen patti rich teen patti real