• 1. Roller chain wear occurs from wear between each pin and bush, and thus oil is applied to these parts.
• 2. On the slack part of the chain, apply lubricant to the gap between each outer plate and inner plate. At the same time, apply lubricant between the bushes and rollers.

Fig. 12. Lubrication locations

• 1. In general the chain has no catenary parts. If possible, remove the load that acts on the roller chain before lubing the chain.
• 2. For roller chain that does not articulate, lube the chain sufficiently and then apply a thick layer of grease around the roller chain to prevent corrosion. Sufficiently lube end fitting connections.
• 3. For roller chain that is used outdoors, contact with rain and snow will remove the lubricant and cause harmful corrosion, and thus a cover or other protection should be installed.
  If rain or snow does fall on the chain, remove the moisture and then promptly lube the chain and coat it with a thick layer of grease.

SAE numbers

Stop operation before oiling.

To verify sufficient lubrication is taking place, remove the chain and inspect the connecting pins and bushes.

If the contact surfaces of the pins or bushes show tearing or a red or dark brown color, lubrication is generally not sufficient.

Lubrication method		Method	Quantity
A	I	Apply oil to the gaps in the pins and inner links on the slack side of the chain. A brush can also be used.	Oil with sufficient frequency (in general about once every 8 hours) so that the roller chain bearings do not dry out.
	II	Drip lubrication Using a simple case, this method drips oil supplied from an oil cup or other oil reservoir.	For one strand of chain, drip about 5 to 20 drops of oil each minute. Drip more oil on higher speed chains.
B		Oil bath The chain is run through oil in a leakfree casing.	If depth h from the surface of the oil to the lowest point the chain reaches is too deep, the oil may heat up (80℃ or higher) and deteriorate. The depth (h) to which the chain descends in the oil should be about 6 to 12 mm.
		Lubrication using a slinger disc Use a slinger disc attached to a leak free case to splash oil on the chain. The peripheral velocity of the disc should be 200 m/min or higher. If the width of the chain is greater than 125 mm, attach discs to both sides.	The lowest point h reached by the slinger disc should be about 12 to 25 mm below the surface of the oil. The roller chain should not enter the oil.
C		Forced lubrication The oil is circulated in a leak-free case and cooled by a pump. When there are n strands of chain, n+1 oiling holes are required, targeting the gaps between each part.	Approximate oiling quantity per oiling hole (L/min) Product name Chain speed (m/min) Size #60 or smaller #80 #100 #120 #140 #160 or larger RS 500～800 1.0 1.5 2.5 4.0 SUP 300 or less RS 800～1,100 2.0 2.5 3.5 5.0 SUP 300～500 RS 1,100～1,400 3.0 3.5 4.5 6.0 SUP 500 or more