Re: Entire head coming down at an angle?
|
Hi Raymond I think that your experience is pretty much typical of 90% of 4x6 owners.? If it works dont mess with it. I am not much into maintenance either, but my science background makes me want to understand why things work like they do, and I keep looking deeper and deeper until I understand.? My bandsaw was a PoS right from the get go in 1987. By that I mean it didn't cut square and I could get it cutting acceptably for the first 20yrs I owned it. Until I got so pissed with it that I analysed it like the science/engineering/geometry problem it is, and now I've pretty much solved all the issues it had and understand the ones I can't fix.? For instance it's most likely NOT poor setup that caused your saw blades to break while cutting - they snap within 20 - 50 hrs of running around the bandwheels, i. e. not cutting and with no guides twisting it (they break in 8-20hrs with guides in place and not cutting!) .? Contrary to reason, tension in the blade has no effect on life. The broken blades had anywhere from 5-30 cracks in them, as shown by dye penetrant testing. I know this from having run 10 blades to destruction in controlled experiments, after getting what I thought were too many breakages in near-continuous cutting.? The reason is: the bandwheels are too small in diameter for the thickness of the blade. I found a graph probably from the 50's or 60's from the 'Hack & Bandsaw Mnfr's Association of America' (some industry group that doesn't exist any more) that showed the minimum diameter for 0.025" blades to be 12", and ours are just over7"!? On the oil issue I recommend that everyone should change to a known 'good' gear oil when they take possession of a saw. New or used.? Because I've seen with my own eyes a brass gear chewed to destruction (1 out of maybe 10-15 that I have inspected is too high to ignore ), and heard of many more through this group, and read of some of those people finding casting sand in the oil (esp from around 2007). You should definitely change yours since it's from that time, though it's not likely yours is faulty since it would have shown by now.? Changing to a Group V, 100%? POE synthetic gear oil means (as OKC Bill will know) that you never have to change it again (these are the oils that they seal into jet engines for their service life).? That RedLine 75W-250 is provably just such an oil (unlike the Lucas 75W-140). Mobil 634 SHC (synthetic-hydro-carbon) is a good Group IV synthetic oil but not in the same longevity class as the RedLine oil and seemingly about the same price Have a happy Christmas everyone - jv On Sun, 24 Dec 2023, 4:16 am Tom Angell via , <tangell=[email protected]> wrote:
|
John Vreede