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View Full Version : XJ basterd leafs spring packs?


Voldemort
07-14-2009, 10:37 PM
Here is a question to all who have done a mix-n-match leaf spring. What did you use to drill out the holes in the XJ main leaf. I need to drill out a couple of the old leafs from 5/16" to 3/8" and I have used steel, titanium nitrate coated, and cobalt bits and they are kicking my ***? What am I doing wrong I'm using a very strong 1/2" drill and I have also tried a drill press with cutting oil and I have gotten very little progress and a lot of dulled bits. Any help will be appreciated.
kmanxj
07-15-2009, 05:17 AM
Doesn't seem like they would be that hard. How fast are you running the drill press?
BlueXJ
07-15-2009, 07:18 AM
Plasma drill press!!!
kmanxj
07-15-2009, 08:36 AM
that would work lol

and bigbad, you shoulda just bought a carbide from the get go. You woulda been done already
Voldemort
07-15-2009, 01:35 PM
Doesn't seem like they would be that hard. How fast are you running the drill press?
Lowest speed for steel.

that would work lol

and bigbad, you shoulda just bought a carbide from the get go. You woulda been done already

Well I thought the cobalt would have done it.
kmanxj
07-15-2009, 01:45 PM
how many RPM is your slowest setting? our mill is 30 and i hope you arent going that slow.
Voldemort
07-15-2009, 01:51 PM
how many RPM is your slowest setting? our mill is 30 and i hope you arent going that slow.

No it is not that big of a press I think it is only a 13"-14" and it just has settings on it I do not know the exact amount of RPM's but it should be working.
Voldemort
07-15-2009, 02:00 PM
I guess what I need to know is are Carbide Bits stronger than a cobalt?
kmanxj
07-15-2009, 02:06 PM
IDK never really used cobalt. I know it doesnt get any better than Carbide though :thumbsup:
Voldemort
07-15-2009, 02:16 PM
Cobalt is supposed to drill armored plating?
offroadman83
07-15-2009, 02:22 PM
Recommended from another board.......I have never tried it but hell why not if i had too??

1. masonary type drill bit
2. sharpen the cutting edges a little with a hand grinder
3. use any lube you want
Voldemort
07-17-2009, 12:37 PM
Recommended from another board.......I have never tried it but hell why not if i had too??

1. masonary type drill bit
2. sharpen the cutting edges a little with a hand grinder
3. use any lube you want

The only thing I have not tried out of those is the masonry bits.
Voldemort
07-21-2009, 12:35 AM
Well I got the ones that I had off the jeep drill out but I had to use a 25/64" bit or a .390 instead of the 3/8" or .375 but it should not be a problem. I did the four on a press with a new bit and this really cool cutting oil I found, but when I go to the main leaf that is still on the XJ I can't keep the speed and pressure right to get it done. Man I'm frustrated!
Voldemort
07-21-2009, 10:13 PM
I finally got them done with a REAL cobalt bit and a 1/2" drill and alot of elbow grease.
offroadman83
07-22-2009, 08:56 AM
congrats!!:thumbsup:
Howler_GT
07-22-2009, 04:01 PM
Softest to hardest

HS Steel----Cobalt----TiNC Cobalt----Carbide


(TiNC--Titanium Nitrite Coated often gold in color)


A good carbide with a standard grind should drill through the spring steel with a little cutting oil and a moderate speed (200-300rpm)
Voldemort
07-22-2009, 07:14 PM
Softest to hardest

HS Steel----Cobalt----TiNC Cobalt----Carbide


(TiNC--Titanium Nitrite Coated often gold in color)


A good carbide with a standard grind should drill through the spring steel with a little cutting oil and a moderate speed (200-300rpm)

This stuff I just learned, also the Cobalt set of bits a Harbor Freight or not Cobalt they are HSS bits and a real cobalt bit does not have HSS printed on it. So check the bits before you buy them.