Where do you get your carbide bits from?
 

After notching my last block with dremel grinding stones (Which took forever and was just a general pain in the ass) I decided to get some carbide bits for this next build. I've seen a lot of places that will sell maybe one good bit for $20-$30 but I found a Hong Kong seller on eBay that sold a pack of 10 different shapes/sizes for $26 shipped. I still used these in my dremel but DAMN did it make a world of difference, I had the whole block notched in about 20 minutes versus 90+. I thought these might be cheap crap being from Hong Kong but they are quality bits, and I only ended up using 2 of them. I'd recommend this seller for anybody wanting to do light port work or block notching, here's a link to his auction.

http://cgi.ebay.com/ws/eBayISAPI.dll...m=170226136393

Anybody else know of cheap or cheaper places to get some?

Re: Where do you get your carbide bits from?
 

Good find. I used those cheap grinding stones in my HF high speed grinder. Took a while to port my HF, but worked well. Thanks for the link, I'm going to get those 1/4" shank ones.

Re: Where do you get your carbide bits from?
 

Yea I was hoping to help some people out looking for good cheap carbide bits.

It was nice seeing my block spewing out aluminum shavings, big enough to where I wasn't inhaling them! I blew my nose when I was done and it was clean. With the old grinding stones I saw nothing but black ---- on the tissue.

Re: Where do you get your carbide bits from?
 

Cool, I'm gonna buy a set to continue my porting. I was going to start IM and you're post arrive just at the right time! :P

Re: Where do you get your carbide bits from?
 

Next up I'll be porting the Z6 IM to match a larger throttle body, and maybe port matching the runners. Nothing too crazy but it should be cake now.

Re: Where do you get your carbide bits from?
 

wow he even sends stuff for free to Spain :y

Re: Where do you get your carbide bits from?
 

I spend over a 100 on each cutter I have but they are insane too much for people with little experince. Rollers most people just use the cheap ones that standard sells they suck but will do the job for little work like intake manifolds for cylinder heads you would spend 100 bucks on rollers that explode every 5 minutes.




For the dude who just needs to notch a block or grind something out the cheap chinesse ones will do thats what I had when i first started. Watch your speeds with those cheap chinesse cutters though I had one that exploded at about 3/4 speed on my makita and would of fucked me up if I didnt have a full mask on. Run them at lower speeds they arent built for high speed torque grinders.

Re: Where do you get your carbide bits from?
 

Well a dremel is high speed, low torque and I used it at full speed (30k rpm I think?) It worked great but I always wear eye protection in case anything bad happens.

Re: Where do you get your carbide bits from?
 

dremel isnt like a die grinder. Die grinder will break your wrist if it gets caught at high rpm. Dremel motor will just struggle and most likely stall



Dremel is fine for high rpm it has to be its a torqueless wonder its the b16a of grinding tools.



The torque of a high powered die grinder I use bosch units that I have to use a dimmer switch set up since the speeds are to erratic for aluminum. Most electric grinders are set up speed wise to cut cast. Thats why most old school machine shops trash honda heads. The softness of aluminum is something their usually not use to. Gouging is common .



Dremel makes it easy though the lack of torque takes away the real ability to ---- anything up but at the same time is very slow from a guy would be selling port work etc



I spend about 10+ hours on a head just grinding/cleaning/blending etc etc


Plus machine time+assembly and again final cleaning


With a dremel I dont thing I could ever finish one

Re: Where do you get your carbide bits from?
 

bits i use are used 4 times, then thrown out kennametal, doall, trw, and greenfield brand. titanium nitrited and moSt coated ftw. free bits. cheaper to replace the bit than spend the $170 an hour of a customers pay towards your profit, to fix a busted bit. safety first.