Pistonbroke
Member
Any tips for drilling new holes for roll pin. All the bits I've got are rounding off and not even marking the tube
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PTO shaft drilling
- Thread starter Pistonbroke
- Start date
Lincs Lass
Member
- Location
- north lincs
Cobalt drills with a drop of oil should do it ,start small
davidroberts30
Member
- Location
- pembrokeshire
Drop a 10mm in to mark center then smaller drill it through then go up in size
Pistonbroke
Member
That's what I was trying to do. Looks like a shopping trip for some better bits. Thanks
Lincs Lass
Member
- Location
- north lincs
Pistonbroke
Member
Always been proud of my drill sharpening technique but you can't polish a turd
Dave W
Member
- Location
- chesterfield
Do you mean pto shaft as in 6 spline stuck out the gearbox or the lemon/triangle tube.
If it's the tube then any old blunt drill bit will do it. Pto tube is soft as sh!t.
Pistonbroke
Member
This f###### tube isn't soft. Can't remember the last time anything caused as much trouble to drill
Dave W
Member
- Location
- chesterfield
I wonder if you've work hardened it by not getting it quite right first time.
Maybe try knocking it in another half inch and gonagain with sharp drill
davidroberts30
Member
- Location
- pembrokeshire
Youve heated the metal now with a blunt drill bit and tempered it so its hard
Lincs Lass
Member
- Location
- north lincs
Dont try drilling it in one go ,,slide the yoke onto the shaft and pre mark it from both sides or you could end up a mile of square ,,if its hollow tube ,like Dave W said ,it should dill easily
dave id be right enough at this stage, maybe just tap it in 5 or 6mm if you havnt a larger crater in it , just enough to get you off the center youve made already, start afresh so to speak.
if you knocked it in too far it could bind with the yoke end.
stay away from the chinesium drills, ruko, dormer, wurth and the likes are a lot cheaper in the long run.
if you knocked it in too far it could bind with the yoke end.
stay away from the chinesium drills, ruko, dormer, wurth and the likes are a lot cheaper in the long run.
Pistonbroke
Member
Started off with brand new bits and they never stood a chance ! I'll pick up a couple of cobalt bits tomorrow and move the tube
Dave W
Member
- Location
- chesterfield
Have you got left handed drill bits
Seriously, something isn't adding up here. Post a few pics of what you're trying to do
thinking about it, its quite possible you were given hardened pto shaft tubing rather than the std tubing, and going by the grief your having its probably the case.
in fairness if it is, its a right pain in the cunnilingus to put a hole in.
maybe if there was a engineering place not far from you it might be the best plan.
ive used solid carbide bit in the past but its a job for the mill, they will go through a file like butter but they are like glass.
dont have any cobalt bits but id say they are the next step up if your set on buying.
in fairness if it is, its a right pain in the cunnilingus to put a hole in.
maybe if there was a engineering place not far from you it might be the best plan.
ive used solid carbide bit in the past but its a job for the mill, they will go through a file like butter but they are like glass.
dont have any cobalt bits but id say they are the next step up if your set on buying.
Dave W
Member
- Location
- chesterfield
It certainly doesn't sound like standard pto tube.
I'm often amazed at how shyte it is given the job it does.
You just have to ask nicely and drill falls through it
- Location
- N.Lincs
It's OK for the 'more precision engineers' on here to faff about with a protractor to get a 118 degree profile but for 'agricultural purposes' 2 hexagon headed bolts, tacked together, will give you a 120 degree guide.....
