The melting shocks me a little Peter, it's marketed as high pressure grease.
The Nulon grease with the PTFE isn't so much for the drive gears though I believe I probably used it when I hyper-tuned and re-engineered my EQ5 PRO mount. I can't afford better but had the head machined to accept a tapered roller bearing on the RA axis (4mm deeper and friend with large engineering shop) instead of the lesser quality standard roller bearing. Considering the EQ5 PRO is much cheaper than the HEQ5 I wouldn't expect the same build quality but I now have a much better quality mount, along with the thrust bearing on the bottom of the same axis, the standard thing is more like tinfoil and very hard to obtain.
There's also a major difference in the internal worm gear, I believe the HEQ5 and EQ6 (HEQ, NEQ) have the brass worm gear which is more like an internal drum with nicks machined in, mine has alloy. That is where I wanted the PTFE grease, all internal. Plus the shim spacers weren't PTFE, they were PET plastic. They are all now PTFE (though I destroyed an unobtainable leg retainer (needle retainer) on a very expensive Rotring (older $200 plus compass)) from my drawing set, I can probably machine a new part on the lathe and milling machine one day but it's so small and my eyes don't do tiny any more. Compass being used to basically scribe through the 0.5mm PTFE sheet to make the appropriate sized shims. My mount is very smooth and last time I bothered aligning it correctly (by luck me thinks) it performed flawlessly for a much lesser mount.
I'm often wary of Jaycar products, often cheap Chinese imports. They used to be great, not so much now.
Quote:
L80 keeps water and dust out while a plating of PTFE is applied to the mating surfaces under working conditions. Seal performance is improved and operating temperature reduced, resulting in less grease "throw". L80 is applicable to the majority of situations specifying grease lubrication, especially in high pressure, water and salt-water conditions including wire ropes.
L80 has a continuous temperature operating range of -9°C to 150°C.
L80 provides a residual lubrication, which is added insurance, combined with savings through less wear and downtime, making it an economical benefit. Smoother running, increased efficiency and prolonged machinery life, less labour and less volume of lubricant, all indicate higher profits. Where L80 has been used on a continuous basis, seizing and pitting will not occur on the friction surfaces.
The grease to use where others fail!
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The operating range is good with the Nulon Extreme, not the cheapest grease but I do a lot of mechanical based stuff and I bought the 450 Gram tub
https://en.wikipedia.org/wiki/NLGI_consistency_number
This doesn't seem to mention the temperature ranges of the varying NLGI grades, the nulon extreme runs -9C to 150C temperature range.
Again, a great internal grease, won't hurt on the gears but there will be better, slightly thicker greases with high melting temperature.
I believe I used Moly grease once and it melted on a hot night and made quite the mess. The PTFE probably isn't required for the drive work though,
Don't forget to check the meshing of the drive gears, too tight and you will have issues, there needs to be minimal backlash and also, if you want to go that far check neither set of end bearings the worm gear sits in have seized, that too will cause a lot of drag and issues.
Good luck and if I can be of any help don't hesiotate to fire off a PM. I don't know near as much as a lot of people here but I probably seem to come in a little more regularly andI'm more than happy to try and assist if I can
