Re: Older Rongfu RF-115 bansaw details required
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Sounds like you're onto it. I've done a lot of testing of different oils to see which controlled the heating up of the gearbox best. They all heat up quite significantly when cutting? continuously - 50F to 140F in 30min! Best oil (lowest heating) I found was Redline Heavy Shockproof 75W-250 for normal temperatures (use their Lightweight Shockproof 75W-140 if you are cutting when the saw is below freezing). It's expensive but being 100% synthetic polyol-ester base, you'll never need to change the oil again. Think of it as insurance in the longevity of your saw.? There are other very good oils out there, it's just that most of them are not available everywhere or in small quantities, whereas Redline is.? For an RF115 use 8floz (250ml). This volume is a pain to get in unless you lean the saw back, against the wall or your bench, until the top surface of the gearbox is not quite level. Precarious but do-able.? Ditch the rubber gasket and use red Loctite Mastergasket.? I've used 10mm clear lexan as the lid with a filler and drain plug so I could see and change the oil easily, but if you're never going to change the oil again there's not much point - jv
Hi John, I got everything cleaned and painted and replaced 4x bearings, had to make tools on lathe to get new bearings set on shaft with oil seales, ...sealed SKF bearings.? Today I installed the two gears in casing with shaft centrepoints hopefully alligned. I fitted the drive pulley, which had a very slight play, used paint trick to get it set stiff. I made a spacer between outer bearing and pulley so pully dont go deaper than it should for C-Clip at end of shaft. Now I just need to buy a new key fit to complete this part. From what I can gather the oil must be 85W-140 gear oil, now I am trying to find that oil locally and it not destroy bronze/brass gear, I am pretty happy how this part turned out. I could not find the info exactly I wanted, but after cleaning the shafts I found bearing markings as indication. It looks like the 2 gears are alligned correctly, I will test to confirm this later. The bearings press harder on shafts than on inner casings, I made use of freezer. I go on my logic here, I doubt I can totally trust previous assembly seeing it throw blades.
Hi Chris/Hettie Gearbox repair is?the most complicated part of working on these saws, but it appears you've got the gearbox apart?and that's a feat in itself. There is no OEM manual that has the info you require, they never did the manuals like that, however the information is known, though I haven't got it quite in the format you've asked for. It'll be quicker for me to PM you what I've got and we can discuss what extra you need from there - jv
Hi,
I recently aquired an older RongFU RF-114 model bandsaw to restore, it was throwing blades by previous owner.
I need to replace all bearings and seals.
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I need the exact info/measurements placing the bearings on the two gearbox sfats plus the seal positions, seeing I cannot trust the way they came out when I received the saw.
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How can I find a manual for this, and the precise installation instructions regarding the sma:: gearbox components.
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Thankyou in advance
Chris/Hettie
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John Vreede