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nawiercanie (please read context...)

English translation: spot drilling

22:16 Feb 14, 2017
Polish to English translations [PRO]
Tech/Engineering - Metallurgy / Casting
Polish term or phrase: nawiercanie (please read context...)
Występuje w moim tekście w dwóch postaciach:

nawiercanie niewielkiego wgłębienia w celu naprowadzenia wiertła (później zapewne bo jest to usługa oferowana przy odlewach) oraz nawiercanie głębszego otworu, ale wciąż ślepego (nie na wylot)

W drewnianych dziedzinach to się nazywa pilot hole... waham się między drilling pilot holes i pre-drilling, ale mam wrażenie (być może niewłaściwe) że pre-drilling odnosi się do dziur na wylot tylko z mniejszą średnicą.

Poza tym czy takie płytkie wgłębienie to też jest pilot hole?
magdadh
United Kingdom
Local time: 13:36
English translation:spot drilling
Explanation:
The purpose of spot drilling is to drill a hole that will act as a guide for drilling the final hole. The hole is only drilled part way into the workpiece because it is only used to guide the beginning of the next drilling process. {https://en.wikipedia.org/wiki/Drilling}

Center drill bits, occasionally known as Slocombe drill bits, are used in metalworking to provide a starting hole for a larger-sized drill bit or to make a conical indentation in the end of a workpiece in which to mount a lathe center.
In either use, the name seems appropriate, as the bit is either establishing the center of a hole or making a conical hole for a lathe center.
However, the true purpose of a center drill bit is the latter task, while the former task is best done with a spotting drill bit. {https://en.wikipedia.org/wiki/Drill_bit#Center_and_spotting_...}

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Note added at   1 godz. (2017-02-14 23:33:04 GMT)
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Jeżeli chodzi o pytania:
1. nawiercanie (wykonanie lekkiego wgłębienia w celu lepszego prowadzenia wiertła. Potocznie nawiercanie oznacza też wiercenie otworu ślepego (nie na wylot).):
https://pl.wikipedia.org/wiki/Wiercenie
2. pre-drilling and pilot holes:
https://www.youtube.com/watch?v=nprmplSKqgA
https://www.youtube.com/watch?v=vUVJ9JXlZek
https://www.youtube.com/watch?v=2rEqVvW75Q4
Selected response from:

An-Ja
Poland
Local time: 14:36
Grading comment
Excellent, thank you again.
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +2spot drilling
An-Ja
2spotting
Jacek Kloskowski


  

Answers


33 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +2
spot drilling


Explanation:
The purpose of spot drilling is to drill a hole that will act as a guide for drilling the final hole. The hole is only drilled part way into the workpiece because it is only used to guide the beginning of the next drilling process. {https://en.wikipedia.org/wiki/Drilling}

Center drill bits, occasionally known as Slocombe drill bits, are used in metalworking to provide a starting hole for a larger-sized drill bit or to make a conical indentation in the end of a workpiece in which to mount a lathe center.
In either use, the name seems appropriate, as the bit is either establishing the center of a hole or making a conical hole for a lathe center.
However, the true purpose of a center drill bit is the latter task, while the former task is best done with a spotting drill bit. {https://en.wikipedia.org/wiki/Drill_bit#Center_and_spotting_...}

--------------------------------------------------
Note added at   1 godz. (2017-02-14 23:33:04 GMT)
--------------------------------------------------

Jeżeli chodzi o pytania:
1. nawiercanie (wykonanie lekkiego wgłębienia w celu lepszego prowadzenia wiertła. Potocznie nawiercanie oznacza też wiercenie otworu ślepego (nie na wylot).):
https://pl.wikipedia.org/wiki/Wiercenie
2. pre-drilling and pilot holes:
https://www.youtube.com/watch?v=nprmplSKqgA
https://www.youtube.com/watch?v=vUVJ9JXlZek
https://www.youtube.com/watch?v=2rEqVvW75Q4


    Reference: http://blog.cnccookbook.com/2012/05/15/when-to-use-a-spot-dr...
An-Ja
Poland
Local time: 14:36
Works in field
Native speaker of: Native in PolishPolish
PRO pts in category: 4
Grading comment
Excellent, thank you again.
Notes to answerer
Asker: Spot drilling sounds perfect. I should have read the whole Wiki entry :( Thank you!


Peer comments on this answer (and responses from the answerer)
agree  A.G.: spóźniłem się o 1 minutę
10 mins
  -> Dziękuję. :-)
agree  Frank Szmulowicz, Ph. D.
1 hr
  -> Dziękuję Frank.
Login to enter a peer comment (or grade)

2 hrs   confidence: Answerer confidence 2/5Answerer confidence 2/5
spotting


Explanation:
Dodatkowa opcja (można stosować wymiennie) :

After the workpiece is positioned and securely clamped, a center drill (combination drill and countersink) or spot drill is usually used to create a more positive starting point for a twist drill. This operation is sometimes called spotting, and the mark created can be called a spot.

https://books.google.com/books?id=oILAAgAAQBAJ&pg=PA344&lpg=...

Jacek Kloskowski
United States
Local time: 08:36
Native speaker of: Native in PolishPolish, Native in EnglishEnglish
PRO pts in category: 12
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