21.

jercej
(Reamer)
1. jercej keâe JeieeakeâjCe jercej kesâ Øekeâej (Types of Reamer)
(Classification of Reamer) nwC[ jercej-
jereEceie • jereEceie Øeef›eâÙee Éeje henues mes ef[^ue efkeâÙes efÚõ ceW
hewjsueue nwC[ jercej • FmeceW Heäuetšdme meceevlej nesles nQ
(Parallel hand Reamer) leLee meerOes Je IegceeJeoej nesles
met#ce keâšeF& keâjkesâ Gmekeâer mener ceehe leLee efHeâefveMe
nQ~ Fmekesâ Éeje 0.05 mes
Øeehle keâer peeleer nw~ Fmekesâ efueS efJeefYeVe jercejeW keâe 0.125 efceceer Oeeleg keâes keâeše
ØeÙeesie efkeâÙee peelee nw~ pee mekeâlee nw~
• Fme ef›eâÙee ceW keâeÙe&KeC[ keâes Kejeo kesâ Ûekeâ Ùee Hesâme šshej nwC[ jercej • Fmekeâer meneÙelee mes efÚõeW keâes
huesš ceW yeeBOeles nQ leLee jercej keâes šsuemše@keâ ceW (Taper hand Reamer) šshej efoÙee peelee nw~
hekeâÌ[e peelee nw~
S[pemšsyeue nwC[ jercej • FmeceW yee@[er hej šshej ceW yengle
jercej • jercej Skeâ ceušer hJeeFbš keâeEšie štue neslee nw~ (Adjustable Hand mes muee@šdme yeves nesles nQ~ Fme
efpemekeâe ØeÙeesie jereEceie kesâ efueS efkeâÙee peelee nw, Reamer) jercej ceW keâeEšie yues[eW keâes
DeLee&led henues mes yeveeÙes efÚõ keâes Deuhe cee$ee ceW, meceeÙeesefpele efkeâÙee peelee nw~
efkeâvleg GÛÛe ßesCeer keâer Megælee kesâ meeLe yeÌ[e keâjves kesâ Fmekeâe ØeÙeesie yengle keâce cesšue
efueS efkeâÙee peelee nw~ nševes kesâ efueS efkeâÙee peelee
nw~
• 12.5 mm JÙeeme kesâ efueS ueieYeie 0.4 mm
šshej efheve nwC[ jercej • Fmekeâe ØeÙeesie Yeer ef[^ue efkeâÙes
jerefcebie SueeGvme leLee 12.5 mm mes DeefOekeâ kesâ (Taper Pin Hand Reamer) nesue keâes šshej osves kesâ efueS
JÙeeme kesâ efueS 0.8 mm jerefcebie SueeGvme efoÙee efkeâÙee peelee nw~
peelee nw~ SkeämehewMeve nwC[ jercej • Fmekeâer yee@[er keâes efmhueš efkeâÙee
Which is a multipoint cutting tool used to enlarge an peelee nw~ FmeceW Skeâ hueie
already made hole with a small amount but with Éeje yee@[er keâes SkeämeheQ[ efkeâÙee
high degree of accuracy, so that the edge is smooth– pee mekeâlee nw~ Fmeer efueS Fmes
Reamer SkeämeheQMeve jercej keânles nQ~
keâewve-mee yeng-efyebog keâle&ve GhekeâjCe nw efpemekeâe ØeÙeesie henues mes • Fmekeâe ØeÙeesie yeÌ[s meeFpe kesâ
yeveeS ieS efÚõ keâes Deuhe cee$ee ceW, efkebâleg GÛÛe ßesCeer keâer nesue keâes jereEceie keâjves ceW efkeâÙee
efJeMegælee kesâ meeLe yeÌ[e keâjves kesâ efueS efkeâÙee peelee nw, leeefkeâ efkeâveejs peelee nw~
efÛekeâves jnW– jercej heeÙeueš nwC[ jercej • Fme jercej keâes efkeâmeer Yeer efÚõ

DMRC Maintainer Fitter, 19-04-2018 (Pilot Hand Reamer) ceW meerOee ieeF[ keâjves kesâ efueS
A process performed after drilling or boring for Fmekeâer yee@[er kesâ Devle ceW Skeâ
smoothness and accuracy of work piece is known as- heeÙeueš yeveeÙee peelee nw~
Reaming The taper in a taper pin reamer is– 1 in 50
Jeke&â heerme keâer efÛekeâveeF& Deewj mešerkeâlee kesâ efueS ef[^efuebie Ùee yeeseEjie šshej efheve jercej ceW šshej ............... nw– 50 ceW 1
kesâ yeeo keâer peeves Jeeueer Øeef›eâÙee keâes keâne peelee nw– jerefcebie ISRO Technician-B Fitter 02-06-2019
The process of enlarging and finishing previously
UPRVUNL Fitter, 09-05-2015
drilled holes to accurate sizes using a multipoint
How does a hand reamer differ from a machine cutting tool is– Reaming
reamer– larger bevel lead for the cutting edges henues mes heefjJesefOele efÚõeW keâes yeng efyebog keâle&ve GhekeâjCe kesâ Éeje
Skeâ nwC[ jercej, Skeâ ceMeerve jercej mes kewâmes efYeVe neslee nw? ÙeLeeLe& Deekeâej ceW yeÌ{eves Deewj heefj<keâjCe keâjves keâer Øeef›eâÙee
keâle&ve keâesjeW kesâ efueS ye=nled yesJeue ueer[ ................. nw– jerefcebie
ISRO Technician-B Fitter 04-03-2018 ISRO Technician-B Fitter 02-06-2019
Reamer 292 YCT
 The process of enlarging and finishing a hole is The reamer is always removed from the finised
known as– Reaming holes– By removing the drill pressure
Skeâ efÚõ kesâ efJeJeOe&ve SJeb heefjmeppeve keâer Øeef›eâÙee keâes ............. jercej keâes efHeâefveM[ efÚõ mes ncesMee nšeÙee peelee nw–
keânles nQ~ jerefcebie ef[^ue oyeeJe keâes nšekeâj
ISRO Technician-B Fitter 25-09-2016 IOF Fitter 10-9-2017
A reamed hole has patches of poor surface finish. A reamer is used to correct the–
Which is the cause for this defect– Size and roundness of hole
Insufficient coolant supply Skeâ jercej keâe ØeÙeesie mener keâjves kesâ efueS efkeâÙee peelee nw–
Skeâ jerc[ efÚõ ceWs Kejeye melen efHeâefveMe kesâ keâejCe hewÛe nw~ Fme efÚõ keâe Deekeâej Deewj ieesueeF&
oes<e keâe keâejCe nw– DeheÙee&hle Meerleuekeâ Deehetefle& IOF Fitter 10-9-2017
ISRO Technician-B Turner 21.02.2015 Drilling is followed by– Reaming
The type of reamer used for reaming operation in a ef[^efuebie kesâ yeeo.............neslee nw– jerefcebie
blind hole, is– Right hand spiral fluted reamer (IOF Fitter 2017)
efkeâmeer DebOe efÚõ ceW jerefcebie ØeÛeeueve nsleg ØeÙegòeâ jercej keâe Øekeâej What tool is used to finish a drilled hole– Reamer
..................... nw– oeS neLe mheeFjue Heäuetš[ jercej ef[^ue efkeâS Skeâ megjeKe keâe efheâefveefMebie efkeâme štue Éeje efkeâÙee peelee
ISRO Technician-B Turner 25.09.2016
nw– jercej Éeje
What is the reason for the fact that reamers usually (NTPC Fitter, 2014)
have even number of cutting edges– ceMeerve jercej (Machine Reamer)-
To make the diameter measurement easier jespe ceMeerve jercej • Fmekeâe ØeÙeesie jHeâ jerefcebie keâeÙe&
jercej ceW mece mebKÙee ceW keâle&ve Úesj nesles nQ, Fmekeâe keâejCe keäÙee (Rose machine keâjves kesâ efueS efkeâÙee peelee nw~ Skeâ
nw– JÙeeme ceeheve keâes Deemeeve yeveeves kesâ efueS Reamer) jerefcebie kesâ yeeo nwC[ jerefcebie keâer
ISRO Technician-B Turner 10.12.2017 peeleer nw~
For a hole of diameter 8 mm, the reaming allowance
should be about— 0.2 mm
8 efceceer. JÙeeme kesâ Skeâ efÚõ kesâ efueS, jerefcebie/efÚõJeOe&ve Devegceefle
keâjeryeve ................... nesveer ÛeeefnS– 0.2 efceceer.
ISRO Technician-B Turner 10.12.2017 efpeie ceMeerve jercej Fme jercej ceW jerefcebie keâeÙe& keâjves nsleg
•
What is the purpose of Taper reamer–
To finish taper hole (Jig machine Reamer) efpeie huesš ceW ieeF[ yegMe ueieeÙes
šshej jercej keâe keäÙee GösMÙe nw– šshej efÚõ keâes heefj<ke=âle peeles nQ~ Fve ieeF[ yegMeeW keâer
RRB ALP RAC 23.01.2019, Shift-I meneÙelee mes ner jercej keâes ieeF[
What is the function of the part ‘pilot’ provided in efkeâÙee peelee nw~ Fmekeâe ØeÙeesie ceeme
the reamer– Finishing of concentrated Hole Øees[keäMeve ceW efkeâÙee peelee nw~
jercej ceW Øeoeve efkeâS ieS Yeeie ‘‘heeÙeueš’’ keâe keäÙee keâeÙe& neslee Mewue ceMeerve jercej • Mewue ceMeerve jercej keâer yee@[er Devoj
nw– mekeWâefõle efÚõ keâer efheâefveefMebie keâjvee (Shell machine mes KeesKeueer leLee šshej ceW nesleer nw
RRB ALP Fitter 23-01-2019, Shift-III Reamer) efpemeceW Skeâ Deeye&j efHeâš keâjkesâ
The hand reamer is guided into the hole by a– jercej keâes ØeÙeesie ceW ueeÙee peelee nw~
Long taper lead
nmle jercej keâes efÚõ ceW ........... Éeje ues peeÙee peelee nw–
uebyee šshej ueer[
ISRO Technician-B Turner 02.06.2019 Heäuetšs[ ceMeerve jercej Fme jercej ceW DeefOekeâ mebKÙee ceW
•
A φ6H7 hole is to be remed in a steel work piece. (Fluted Heäuetšdme yeves nesles nQ efpevekesâ uewC[
machine
What size of drill will be required– 5.8 mm Reamer) hej ceee|peve leLee yee@[er keäueerÙejsvme
Skeâ φ6H7 efÚõ Skeâ mšerue Jeke&â heerme ceW jerce keâjvee nw~ efkeâme nesleer nw~ Fmekesâ Éeje Megæ leLee
Deekeâej kesâ ef[^ue DeeJeMÙekeâ neWies– 5.8 mm DeefOekeâ heefj<ke=âle melen Øeehle nesleer
jercej ef[^ue meeFpe keâer ieCevee nw~
S[pemšsyeue ceMeerve jcej • FmeceW ueies yues[dme keâes efkeâmeer Yeer
jercej ef[^ue meeFpe (R.D.S.) = jercej meeFpe (R.S.) - (Adjustable machine meceÙe yeenj efvekeâeuekeâj Oeej ueieeÙeer
(DeC[j meeFpe ceee|peve ± DeesJej meeFpe) Reamer) pee mekeâleer nw Deewj FmeceW ueies ieeF[
A cutting tool used to finish and enlarge a hole is vešeW keâer meneÙelee mes Fmes efkeâmeer Yeer
known as– Reamer Deekeâej ceW S[pemš efkeâÙee pee
nesue keâes efHeâefveMe Deewj yeÌ[e keâjves kesâ efueS keâefšbie štue keâe ØeÙeesie mekeâlee nw~
efkeâÙee peelee nw- jercej šshej ceMeerve jercej • Fme jercej keâer yee@[er šshej ceW nesleer
RRB ALP 23-1-2019, Shift-II
UPSSSC Tubewell Operator, 02-09-2018
nw leLee šshej nesue keâes jercej keâjleer
ISRO Technician B Fitter 21-04-2018, Shift -III nw~
Reamer 293 YCT
 Which reamer is used to remove very few metal? _______ is used to correctly clean the hole.
Adjustable Reamer Reamer
yengle keâce cewšue nševes kesâ efueS keâewve mee jercej ØeÙeesie neslee nw– Úso keâes mener {bie mes meeheâ keâjves kesâ efueS GheÙeesie efkeâÙee peelee
S[peefmšyeue jercej nw~ jercej
DRDO Machinist.2016
(IOF Fitter, 2015) KPSC Juniur Instructor (Fitter) 24.09.2018
Which reamer will finish the standard hole– Which in direction reamer should always be rotated-
Expansion Reamer Clock wise
mšwC[[& megjeKe keâes keâewve mes jercej Éeje efheâefveefMebie keâjWies– jercej meowJe efkeâme efoMee ceW Ietcelee nw~ JeeceeJele&
SkeämeheQMeve jercej KPSC Juniur Instructor (Fitter) 24.09.2018
(CRPF Constable Tradesman, 2016) Reamer is made of High speed steel
Which reamer is suitable for drilling holes in the jercej yevee neslee nw- neF& mheer[ mšerue
key-way groove– Helical flutes reamer
keâer-Jes «etJe ceW Úso keâjves kesâ efueS keâewve-mee jercej GheÙegkeäle nw–
nsefuekeâue Heäuetšs[ jercej 2. jerefcebie SueeGvme leLee keâesCe
(MAZAGON DOCK Ltd. Fitter, 2013) (Reaming allowance and Angle)
The reamer is a– multi point cutting tool
jercej.............nw– yeng efyevog keâle&ve Ghemkeâj How much amount of metal is removed with the
DRDO Machinist.2016 help of reamer– 0.02 to 0.15 mm
ISRO Grinder 27-11-2016 jercej keâer meneÙelee mes efvekeâeueer ieF& Oeeleg keâer cee$ee nesieer–
Spiral flutes of reamer is– Left handed
0.02 mes 0.15 efce.ceer.
jercej keâe mheeFjue Heäuetšdme.......neslee nw– yeeÙeeR lejHeâ
DRDO Machinist.2016
(IOF Fitter 2017)
Reamers are made from- UPRVUNL Technician Grade II Fitter 22-09-201
Cast Steel, high speed steel What is the difference in the angle made by the
jercej yeveeS peeles nQ– keâemš mšerue, neF& mheer[ mšerue groove along the length of the reamer–
4 Degree to 8 Degree
Punjab Diesel Mechanic Instructor 07.07.2013
jercej keâer uebyeeF& Jeeueer veeueer Éeje yeveeS ieS keâesCe ceW efkeâlevee
Which machine reamer is used to correct the
misalignment between the reamer axis and the work heâke&â neslee nQ– 4 ef[«eer mes 8 ef[«eer
axis– Floating blade reamer UPRVUNL TG II FITTER 09-11-2016
efkeâme ceMeerve jercej keâe GheÙeesie jercej Sefkeämeme leLee Jeke&â Sefkeämeme Does finishing with a reamer increase the diameter
kesâ ceOÙe DemebjsKeCe keâes "erkeâ keâjves kesâ efueS efkeâÙee peelee nw– of the hole– Simply increases
heäueesefšbie yues[ jercej keäÙee jercej Éeje efheâefveefMebie keâjves mes megjeKe keâe JÙeeme yeÌ{ peelee
MPPEB Turner Instructor 10.11.2016 nw– meeOeejCe mee yeÌ{lee nw
Which machine reamers does not have the shank as (HAL Fitter, 2015)
an integral part of the reamer– Shell reamer How much reaming allowances is usually kept in the
efkeâme ceMeerve jercej ceW jercej kesâ DeefYevve Debie kesâ ™he ceW MeQkeâ veneR drill hole– ± 0.005 mm
nesleer nw– Mewue jercej meeceevÙele: ef[^ue nesue ceW jerefcebie SueeGbme efkeâlevee jKee peelee nw–
Kerala PSC Turner 18.08.2015 ± 0.005 efceceer.
The Morse taper provided on reamers ranges from-
1 to MT 5 (IOF Fitter, 2016)
jercej hej GheueyOe ceesme& šshej _______ lekeâ nesleer nw– What is the taper angle of the end of a reamer–
450
1 mes MT 5
Skeâ jer cej kes â ef mejs keâe šshej keâes Ce efk eâlevee jKee peelee nw–
DSSSB Craft Instructor draughtman(97-14)
450
The teeth end of rose reamer beveling at ____ 45°
DRDO Machinist.2016
jespe jercej ØeJeCeve keâe oble Úesj neslee nw- 45°
(MES Fitter Tradesman, 2015)
HPSSSC Fitter (20-10-2019)
Uneven gap in between reamer's teeth provided for-
During reaming metal is cut _____ to 0.15 mm.
0.02 mm There is no chattering while reaming
heefjJesOeve kesâ oewjeve Oeeleg keâes ______ mes 0.15 efceceer. keâeše jercej kesâ oeBleeW ceW Demeceeve iewhe efkeâmekesâ efueS neslee nw ?
peelee nw~ 0.02 mm jereEceie keâjles meceÙe Ûewšefjbie veneR nesleer nw
HPSSSC Fitter (20-10-2019) UKSSSC Instructor 2017
Reamer 294 YCT

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