technical data Drive chain Roller Chain Selection
12. Temperature selection method
12.1 RS roller chain Temperature Selection Method
Strength is expected to decrease with temperature.
Use lubricating oil suitable for the operating temperature.
・Problems with roller chain transmission at high temperatures
- 1. Increased wear due to reduced hardness
- 2. Increased elongation due to softening
- 3. Poor flexibility and increased wear due to deterioration and carbonization of oil
- 4. Scale formation causes poor bending and increased wear
・Problems with roller chain transmission at low temperatures
- 1. Decrease in impact strength due to low-temperature brittleness
- 2. Solidification and loss of fluidity of lubricating oil
- 3. Poor bending due to frost or ice buildup
| temperature | RS roller chain | Cold resistant roller chain | |
|---|---|---|---|
| RS60 or less | RS80 or more | ||
| Below -60°C | - | - | Not available |
| -60℃ or higher and below -50℃ | - | - | Catalog value x 1/2 |
| -50℃ or higher and lower than -40℃ | - | Not available | Catalog value x 2/3 |
| -40℃ or higher and lower than -30℃ | Not available | Catalog value x 1/4 | Catalog value |
| -30℃ or higher and below -20℃ | Catalog value x 1/4 | Catalog value x 1/3 | Catalog value |
| -20℃ or higher and below -10℃ | Catalog value x 1/3 | Catalog value x 1/2 | Catalog value |
| -10℃ to under 60℃ | Catalog value | Catalog value | Catalog value |
| 60℃ or higher but lower than 150℃ | Catalog value | Catalog value | Catalog value |
| 150℃ or higher but lower than 200℃ | Catalog value x 3/4 | Catalog value x 3/4 | Not available |
| 200℃ or higher but lower than 250℃ | Catalog value x 1/2 | Catalog value x 1/2 | - |
| Over 250°C | Not available | Not available | - |
- Notes: 1. Select using allowable tension selection method.
- 2. The ambient temperature and the temperature of the roller chain itself are different. We recommend selecting the temperature of the roller chain itself.
12.2 Lambda Chain KF Series Selection Method
Selection is made using the general selection method using kW ratings table.
Strength is expected to decrease with temperature.
Select Lube-free Drive chain by multiplying the value in kW ratings table by the coefficient below.
Use the chain at a speed equal to or less than the allowable speed shown in the dimensions and specifications table for Lube-free Drive chain.
| temperature | Transmission capacity |
|---|---|
| 150℃ or higher but lower than 200℃ | Catalog value x 3/4 |
| 200℃ or higher but lower than 230℃ | Catalog value x 1/2 |
12.3 Selection method for stainless Drive chain (SS/ NS Series) at high temperatures (over 400°C)
As the temperature of the chain increases, its strength decreases. The limit of its use at high temperatures is determined by the temperature of the chain itself.
Please consult us if you plan to use the product in an atmosphere of 400°C or higher. It cannot be used at temperatures above 700°C.
In the temperature selection method, the upper limit of chain speed is 50 m/min.
For chains with a chain pitch of 57.15 mm or more, adjust to the maximum speed limit specified in the allowable tension selection method.
There are two points to keep in mind when using high temperature environments:
- 1. To prevent poor bending and roller rotation caused by thermal expansion, it is necessary to change the clearances of each part.
- 2. The higher the temperature, the more likely it is that the chain will change in physical properties, such as breaking under low load (creep rupture).
