10 Use Under Special Conditions Generally, roller chain should be used in relatively clean air and in temperatures of 10°C to 60°C (50°F to 140°F). Refer to the chart below when operating outside this temperature range.
Ambient Temperature
Comments
-50°C ~ -30°C (-60°F ~ -20°F)
Use a special cold-resistant material.
1. Use a lubricating oil for extremely low temperatures. 2. Power transmission efficiency will be reduced.
-30°C ~ -10°C (20°F ~ -15°F)
60°C ~ 150°C (140°F ~ 300°F)
Use a lubricating oil for high temperatures.
1. Use a lubricating oil for very high
temperatures. 2. Since the wear resistance of the chain is reduced, a larger chain size is recommended.
150°C ~ 260°C (300°F ~ 480°F)
1. Use a lubricating oil for extremely
high temperatures. 2. Heat-resistant steel must be used or chain hardness will decrease and chain strength will be significantly reduced.
260+°C (480+°F)
Use in Wet Conditions If a chain is splashed with water or runs through heated vapor, such as in a sterilizing machine or water screen, the following problems may occur: 1. An increase in abrasive stretch due to improper or insufficient lubrication. 2. Shortened chain life due to oxidation of the chain material.
In such cases, take the following measures: 1. Decrease bearing pressure by using a larger chain size. 2. Use plated or stainless steel chain. 3. Use a more suitable lubricant.
U SE U NDER S PECIAL C ONDITIONS 19
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