12-20-2014, 01:30 AM
Ken,
I ended up using the GTL inserts I had, as the GTN inserts I ordered didn't show up, according to the supplier, they should be here by Tuesday, but the spuds have to be on the job on Monday morning. The GTL inserts worked good, I put a dab of cutting oil meant for stainless steel, on the tip, so there wouldn't be any kind of build up on the tip, during the cut.
To stop drill bit wandering, on the top of the tube, I drilled the holes with a centering/spotting drill, as they are very stout, and they won't wander. I was surprised that a used bit, drilled all of the 300 holes, without any issues.
The cutting oils, I use, are made by one of my customers, Baum's Castorine, in Rome, NY. They make a larg selection of oil and solvents, one of their main customers is the copper wire industry. They make the wire drawing lubes and they make the grease for the space shuttle. They started out in the 1870s, as a company that made patent medicine and horse rein and leather cleaners and dressings. I also buy my hand soap from them, the prices are great (be nice to jack, and the boiler maintenance and repair costs will be lower)
I ended up using the GTL inserts I had, as the GTN inserts I ordered didn't show up, according to the supplier, they should be here by Tuesday, but the spuds have to be on the job on Monday morning. The GTL inserts worked good, I put a dab of cutting oil meant for stainless steel, on the tip, so there wouldn't be any kind of build up on the tip, during the cut.
To stop drill bit wandering, on the top of the tube, I drilled the holes with a centering/spotting drill, as they are very stout, and they won't wander. I was surprised that a used bit, drilled all of the 300 holes, without any issues.
The cutting oils, I use, are made by one of my customers, Baum's Castorine, in Rome, NY. They make a larg selection of oil and solvents, one of their main customers is the copper wire industry. They make the wire drawing lubes and they make the grease for the space shuttle. They started out in the 1870s, as a company that made patent medicine and horse rein and leather cleaners and dressings. I also buy my hand soap from them, the prices are great (be nice to jack, and the boiler maintenance and repair costs will be lower)
jack