Mijn Kadett C City
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- Site Admin
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- Lid geworden op: 25-05-2010 22:44
Ik weet wel waar je dat gezien hebt.
Todays tip
how to sharpen your own butterfly drill
Remember this is what you are trying to acheive
So start with an 8mm drill, it must be a good quality HSS drill
Then with the bench grinder
Grind the end flat, keep twisting the drill when you are doing this to get it nice and even
Then back into the bench grinder at this sort of angle on the edge of the stone
You need to twist it slightly as you go, then twist it round and do the other side
The idea is to have both sides equal and the same and both cutting points level, with a raised nipple section in the middle, the nipple must be as central as possible or else it will wander as you try to drill, you could centre punch the spot weld if you need to, and by keeping the nipple only 1mm tall, it wont drill right through the underskin either
The important thing is that the trailing edges are lower than the cutting edges, otherwise it will just skid ontop of the steel and not cut in
If you use the following dimensions as a guide you should not go too wrong. Again, plenty of practice helps
The good thing about this type of drill, is that it wont bite as it goes into thin steel, so it wont twist the metal or twist itself out of your hand, and you don't need a pilot hole first either, they are great for drilling big holes in thin steel, you can easily sharpen a 13mm drill like this and drill straight through 1mm steel without snagging
Todays tip
how to sharpen your own butterfly drill
Remember this is what you are trying to acheive
So start with an 8mm drill, it must be a good quality HSS drill
Then with the bench grinder
Grind the end flat, keep twisting the drill when you are doing this to get it nice and even
Then back into the bench grinder at this sort of angle on the edge of the stone
You need to twist it slightly as you go, then twist it round and do the other side
The idea is to have both sides equal and the same and both cutting points level, with a raised nipple section in the middle, the nipple must be as central as possible or else it will wander as you try to drill, you could centre punch the spot weld if you need to, and by keeping the nipple only 1mm tall, it wont drill right through the underskin either
The important thing is that the trailing edges are lower than the cutting edges, otherwise it will just skid ontop of the steel and not cut in
If you use the following dimensions as a guide you should not go too wrong. Again, plenty of practice helps
The good thing about this type of drill, is that it wont bite as it goes into thin steel, so it wont twist the metal or twist itself out of your hand, and you don't need a pilot hole first either, they are great for drilling big holes in thin steel, you can easily sharpen a 13mm drill like this and drill straight through 1mm steel without snagging
Corsa A1 '87 (3L V6) Project
Had:
Corsa A2 '88 (1.4i)
Corsa A2 '88 (1.3NB)
Corsa A1 '86 Sedan (1.2LS)
Corsa A1 '86 (1.0LS»1.4i)
Corsa A1 '85
Corsa A1 '83 Airride
Corsa A1 '83 (c20ne op dellortho's) Luxus
Had:
Corsa A2 '88 (1.4i)
Corsa A2 '88 (1.3NB)
Corsa A1 '86 Sedan (1.2LS)
Corsa A1 '86 (1.0LS»1.4i)
Corsa A1 '85
Corsa A1 '83 Airride
Corsa A1 '83 (c20ne op dellortho's) Luxus
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- Senior member
- Berichten: 2018
- Lid geworden op: 04-11-2010 14:25
Weinig updates hier nog, wel een voor en achteras opgehaald inclusief tussenas afgelopen weekend, in een veel betere staat als mijn eigen. Wil eigenlijk de auto even strippen van de binnenkant (wat al deels gebeurd is) maar ik kan de sleutels nergens weer vinden dus kan de achterklep niet los krijgen
Heb tevens een scharnierpen verwijderaar besteld, beide kanten zit de onderste kneitersvast. Dus dan maar even met het gereedschap zoals het hoort 8) Hoop er zaterdag/zondag nog een paar uurtjes aan te kunnen besteden.
Iemand in de buurt van Deventer nog een goedkoop straal adresje toevallig voor alle vooras delen?
Heb tevens een scharnierpen verwijderaar besteld, beide kanten zit de onderste kneitersvast. Dus dan maar even met het gereedschap zoals het hoort 8) Hoop er zaterdag/zondag nog een paar uurtjes aan te kunnen besteden.
Iemand in de buurt van Deventer nog een goedkoop straal adresje toevallig voor alle vooras delen?
-
- Site Admin
- Berichten: 3259
- Lid geworden op: 25-05-2010 22:44
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- Senior member
- Berichten: 2018
- Lid geworden op: 04-11-2010 14:25
- Aapje
- Moderator
- Berichten: 2819
- Lid geworden op: 26-05-2009 13:09
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- Senior member
- Berichten: 2018
- Lid geworden op: 04-11-2010 14:25
- Aapje
- Moderator
- Berichten: 2819
- Lid geworden op: 26-05-2009 13:09
-
- Site Admin
- Berichten: 3259
- Lid geworden op: 25-05-2010 22:44