RayF
Senior Member
If it works out here's a few pics of a Hitachi EX1900 Boom I bored a while back. It came in from the mine broken almost through. One pic to show the bore welding is from an RH120 I did.
What do you mean by 30 thou preset Steve? Your talking funny again Depending on how far the bore is out I normally cut 2 mm out before I weld it.The machine has a 33/1 reduction for welding.I run 1.2 mm wire (.047) in at 4 metres a minute,around170 amps and 19.6 volts.I aim for no more than 2.5 to 3 mm to take out.In a bore that size I will be doing around 1 rev a minute.The feed through the bore is 3 mm a rev.Ray i have listened to myself talk for 50 years and never heard a problem once. I talked to you 1 second and thought rosetta stone lol. Great pics as always send d10 pics. The one build up pic of the terex your 33/1 welding mode is .030 preset starting point?. Per rev how many thousands were you spiraling on . Steve
I use a mild steel wire S6 grade.I look for a wire that's not tightly wound and has no wax on it left over from rolling.The wax coats the tips and stops a good contact. At present I'm using Weldwell PZ6000 wire. A New Zealand company but the wire is rolled in Italy.nice work... very professional..... what brand and type of wire do you use for the build up?
Richard,the machine is the green thing on the end.Yes,the weld is machined to a few thou clearance on the pin or in the case of a bearing in the bore its machined to a smaller size than the bearing,usually about a thou per inch of bearing diameter.any chance of a pic of the line boring machine itself?
On that photo where you have welded the bore, do you machine it smooth to take a pin or is it the finished article?