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have too much room for deviation when seeking the centre

English translation: Drill bit deviates slightly while driling, causing a less than perfect hole

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:have too much room for deviation when seeking the centre
English translation:Drill bit deviates slightly while driling, causing a less than perfect hole
Entered by: Johan Venter
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08:42 Feb 21, 2005
English to English translations [PRO]
Tech/Engineering - Mechanics / Mech Engineering / turning/parting/threading/grooving tools
English term or phrase: have too much room for deviation when seeking the centre
When making a multi-diameter hole (different diameters in the same hole), (G) it should be noted that drills are generally not designed for counterboring, which is the process involved. Conventional twist-drills do not provide sufficient accuracy and modern, self-centering twist-drills ***have too much room for deviation when seeking the centre***, which results in oval holes. If indexable insert drills with asymmetric geometry are used, deflection of the drill can take place. These problems can be remedied in certain cases by reducing the feed, but the procedure of drilling the largest hole first, then the smaller one is recommended
Marina Capalbo
Local time: 08:14
Explanation below
Explanation:
What it means is that the drill does not centre on one specific point, but that the bit moves around ever so slightly and thereby creating a less than perfectly round hole.
Selected response from:

Johan Venter
Czech Republic
Local time: 08:14
Grading comment
grazie mille!!!
4 KudoZ points were awarded for this answer

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Summary of answers provided
5 +2Explanation below
Johan Venter


  

Answers


13 mins   confidence: Answerer confidence 5/5 peer agreement (net): +2
Explanation below


Explanation:
What it means is that the drill does not centre on one specific point, but that the bit moves around ever so slightly and thereby creating a less than perfectly round hole.

Johan Venter
Czech Republic
Local time: 08:14
Specializes in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 8
Grading comment
grazie mille!!!

Peer comments on this answer (and responses from the answerer)
agree  xxxthinkpad
1 day2 hrs
  -> Thanks, thinkpad

agree  Alaa Zeineldine
3 days17 hrs
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