Machining gears in South Asia - video

[nova_robotics]

How does used motor oil perform as a cutting fluid? I've always been told it's terrible and not to use it, so I've never tried. They might not have access to proper cutting fluid, but I would imagine kerosene would be readily available.

Also they really need a dial indicator.

[metric_taper]

How does used motor oil perform as a cutting fluid? I've always been told it's terrible and not to use it, so I've never tried. They might not have access to proper cutting fluid, but I would imagine kerosene would be readily available.

Also they really need a dial indicator.

That previous video of the same work shop that was making roller chain sprockets, did all the work without an indicator, just an antique caliper, and eyeball.
Oh ya the tape measure.
Seems all their jobs would have some eccentric runout, that you could hear when the machines were running.

[metric_taper]

How does used motor oil perform as a cutting fluid? I've always been told it's terrible and not to use it, so I've never tried. They might not have access to proper cutting fluid, but I would imagine kerosene would be readily available.

Also they really need a dial indicator.

I thought they were using Sulfurized cutting oil, that I think in the old days started out as rendered animal fat. I recall using it on rigid electrical conduit back when my first job was working this trade.
So I looked up using automotive oil, not lots of hits, but it can be used.
I have used pump fed cutting oil, Mobil Gamma on my mill, but typically it's too messy, so I just baby the cuts and don't push the feed hard.
Just seems that cutting oil is a coolant to prevent the heat treat of the cutting tool going soft and dulling the edge. Probably more to it for those high rate of removal production shops.