Thread: LT230 Lubrication Mods

Originally Posted by uninformed

Bump for a great thread. John, do you have any details on cross drilling the imput gear for the early lt230s that dont have it?

Serg, the latter style gears also have the splines broached deeper along the shaft too for more engagement.
I think Matt/rovercare and maybe Steve has drilled gears, I'm guessing you'd need a cobalt bit and lots of coolant, or EDM it.

Steve/RoverRescue has a thread on it.
On the phone ATM so not so easy to search.

Originally Posted by Ancient Mariner

http://www.aulro.com/afvb/.../167743...s-dummies.html

On page 2 there is a couple of pics.Just make sure to set it up square so you drill into the root diam of the spline. tungsten drill .ridjid and slow speed constant pressure + good luck

Just to clarify, the spline is internal, and we want the centre of the drill hole to be centre of the root dis, or female portion of the spline. This would also be the thinest part of the body at that point?

What is your preference of drill bit, Tungsten or cobalt?

What dia hole?

Originally Posted by rick130

Serg, the latter style gears also have the splines broached deeper along the shaft too for more engagement.
I think Matt/rovercare and maybe Steve has drilled gears, I'm guessing you'd need a cobalt bit and lots of coolant, or EDM it.

Steve/RoverRescue has a thread on it.
On the phone ATM so not so easy to search.

Rick, that would have been myself, Steve, and mike_ie who have drilled them, mike and I used a cobalt drill bit and trefolex and drilled it in the drill press, drilled rather easy once I found the correct bit. I'll have a look and see if I can find what brand it is.

OK, this is what is written on the drill bit case.

Allround- Bohrer.

Beton. Mauerwerk. Eisen. Glass. Keramik. Hotz.

Its a blue and white case, drill bits are black with a tungsten carbide looking tip.
Hope this helps

Originally Posted by uninformed

Just to clarify, the spline is internal, and we want the centre of the drill hole to be centre of the root dis, or female portion of the spline. This would also be the thinest part of the body at that point?

What is your preference of drill bit, Tungsten or cobalt?

What dia hole?

Just had a look at a original 10 mm drilled about 50-50 thru the spline.The only reason I suggested the female part was for an even load on the bit when breaking thru.I would have thought cobalt would not cut the mustard but being LR anything is possible

Noel

A stellite drill will drill through the gear like it was made of cheese - they are typically used for drilling high speed steel, such as drilling out broken thread taps.

However they are very expensive, and the heat they generate may adversely affect the gear.

If others have had success with cobalt drills, I would try them.

Thanks for the replys guys. I have an older lt230 that im going to have a go at going through.

Vern, that bit, I believe is made by a company called Artu. German. I saw these over 15 years ago at the timber and wooking with wood shows. Being sold by a guy with head mic and cheesy sails pitch. I thought they were gimmickie rubbish. I have learnt that while they dont replace some of the much more expensive professional equipment, they are pretty good.

Is it just 4 holes equally spaced around the dis? Would a pilot hole be advisable?

Yeah Artu is it, I just drilled a hole straight through with this.