Wamsutta
Well-known member
Who makes the best? I might be needing one as small as #80.
Micro Drill Bits
- Thread starter Wamsutta
- Start date
BillK
Well-known member
What material will you be drilling
cvairwerks
Well-known member
Hertel carbide circuit board bits....
SwissMetric
Well-known member
Various manufacturers, just as example:
www.louisbelet.ch
Couldn't resist, some great screwdrivers:
petitpierre.ch
There are many small highly specialized businesses unknown to the general public. Some don't even have good websites because they don't need any. Swiss precision is not a myth... neither prices.
Catalogue Outils de coupe - Delmeco SA
Votre catalogue outils de coupe disponible sur notre site internet. Visitez notre site internet et parcourez notre sélection d'outils de coupe bon prix!
www.delmeco.ch
Accueil - Louis Bélet SA - Outils de coupe - Vendlincourt - Suisse
www.louisbelet.ch
Couldn't resist, some great screwdrivers:
Tournevis Dynamométriques et Fixes de Haute Précision
Petitpierre propose des tournevis dynamométriques et fixe de haute précision pour l'horlogerie, la microtechnique et l'électronique.
petitpierre.ch
There are many small highly specialized businesses unknown to the general public. Some don't even have good websites because they don't need any. Swiss precision is not a myth... neither prices.
gizardlizard
Well-known member
Totally depends on type of material being drilled, whether it’s hand drilled, or machine drilled or other.
Firebrick43
Well-known member
Just order a Cleveland or Chicago Latrobe for numbered bits in brass.
They are good quality and there is nothing special need as far as bit wise.
I would suggest using a hand pin vise to do it. Power drilling with small bits requires good runout on the spindle and chuck that is missing in most home shop equipment.
They are good quality and there is nothing special need as far as bit wise.
I would suggest using a hand pin vise to do it. Power drilling with small bits requires good runout on the spindle and chuck that is missing in most home shop equipment.
I think 1/64 is the next size up from #80. What kind of intervals? I think I may only do it once or twice in a long time. I'm mainly concerned about getting the roundest hole possible since it will be metering fuel. I'll be using a pin vise for sure. I have two Honda carburetors that are causing a very lean idle condition.
definately by hand is the way to go. be careful & don't drill too large or you'll end up rich.
I would carefully gauge the hole with other bits until one doesn't fit, then drill with that one, assemble & try it . just move a size at a time.
Sorry, I didn't answer your question .
I would carefully gauge the hole with other bits until one doesn't fit, then drill with that one, assemble & try it . just move a size at a time.
Sorry, I didn't answer your question .
Firebrick43
Well-known member
No, a #79 is
gizardlizard
Well-known member
YouTube: hand drilling brass orifices in gas valves. The old timers were great at it. You must do it with your finger tips and sneaking up on the needed size with 3-4 undersized bits is a must. Hand drilling a carb jet is no different.
NHtoolguy
Well-known member
I think the pin vise approach is a good suggestion. Small drills are best used in a sensitive-type drill press, with gentle hand feeding. The typical home drill press won't turn fast enough or provide enough control.
bwringer
Well-known member
If the machine might ever end up with someone else, just document the alteration somehow... I have painful memories of chasing issues with a set of motorcycle carbs for weeks before finally figuring out someone had hogged out the jets.I'm pretty sure it's brass. It's a carburetor idle jet that's non-removable. I suspect the hole diameter is right around 0.35 millimeters.
Yes I know I run the risk of getting black helicopters hovering over my house.
RoninB4
Well-known member
-I have one similar to this for small, sensitive drills. You hold the knurled part (bearing inside) and feed the drill with your fingertips so the drill press quill isn't used. Using a regular drill press quill isn't sensitive enough to provide feedback and will break small drills. There's also a type of drill press made for small drills but they're harder to find and somewhat expensive. Most toolmaker use a type like the one below, mine has a 1/2" shank for collet mounting but there are others.
KnurledNut
Well-known member
Champion USA-made set (#61-80) here.
If U buy a cheaper online metric chynese set, do have your calipers there to verify your using the correct size. They usually go up in 0.05 increments. A 10pc set may start at 0.3mm then 0.35 then 0.40 etc They cheaper ones can be ok and are often more like a reamer than a drill. If U go to far, dab some JB in there and start again. Pin vise and hands is best IME.