I got a few pins that has wore my frame egg shaped on a excavator. I was wondering if anyone has made a home made line borer that might have some suggestions? I was planning on using bearing blocks with flat iron on the bottom but I'm not sure about the boring bar. I know it needs to be at least 2'' in diameter.
-
Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!
line boring suggestions
- Thread starter slingshot
- Start date
I've seen people weld on a mount for a Bridgeport turret and do it, as well as weld on a plate to mount a heavy mag drill. If you were determined enough, you could weld up plates on both sides to support the bar and get an old fashioned cylinder boring machine like used to be used on in-chassis engine rebuilds.
Or what about these?
Portable Inline Boring
Just depends on what you have more of................time or money.
Portable Inline Boring
Just depends on what you have more of................time or money.
Last edited:
Well let's see time is usually easy to make than money lol. I only have three holes to fix so purchasing a line boring machine is out. The max length is only going to be 6'' on one and 4'' on the other two.
I really just need to be pointed in the direction of a boring bar I would like to make my own but I don't know how to put a square hole in a round shaft for cutting tool. I don't have a mill at this time,I guess I could drill a hole through some 1144 or 4140 and finish it up with a dremel tool.
I really just need to be pointed in the direction of a boring bar I would like to make my own but I don't know how to put a square hole in a round shaft for cutting tool. I don't have a mill at this time,I guess I could drill a hole through some 1144 or 4140 and finish it up with a dremel tool.
To make a round hole square cheap... needle file. Takes a bit of work, but when I first got my lathe I made a 3/8" boring bar by drilling 2 1/8" holes (one at 90, one at 45 to hold cutters at different angles) and then squared up the corners with a square needle file. Seems like it would take forever, but in reality I think it only took me an hour or two for both. You may be able to get a larger file in there since I'm guessing your using a larger bit.
The other option is to just drill a round hole big enough for the shank of your cutter. I made a between centers boring bar that used this method, and it was just fine. Just make sure the set screw is pushing "down" on the shank (same direction as the cutting forces).
The other option is to just drill a round hole big enough for the shank of your cutter. I made a between centers boring bar that used this method, and it was just fine. Just make sure the set screw is pushing "down" on the shank (same direction as the cutting forces).
Reid Supply sells square hole sleeves for making boring bars.
http://www.reidsupply.com/products/...cessories/sleeves/?fl=4294897134and4294922220
Just drill a round hole in the bar, weld in the sleeve, drill and tap for set screws.
http://www.reidsupply.com/products/...cessories/sleeves/?fl=4294897134and4294922220
Just drill a round hole in the bar, weld in the sleeve, drill and tap for set screws.
you can get rounr HSS blanks in 1/4" for the cutters.
http://www.ebay.com/itm/1-4-Round-M...ultDomain_0&hash=item33817cd4af#ht_288wt_1164
http://shopfloortalk.com/forums/showthread.php?t=7811&highlight=built+line+bore-er
http://www.ebay.com/itm/1-4-Round-M...ultDomain_0&hash=item33817cd4af#ht_288wt_1164
http://shopfloortalk.com/forums/showthread.php?t=7811&highlight=built+line+bore-er