Ultra Super Chain RF120-US-N-1
Model RF120-US-N-1 / ウルトラスーパチェーン US-N仕様 / Tsubakimoto Chain Co. (Official website)
Successor roller chain to the US specification. Sales of the US specification were discontinued at the end of September 2016; currently made to order (quote required).
Last verified: (date the content was verified against the source document)
Specifications
| Pin diameter D | 11.11 mm |
|---|
ウルトラスーパチェーン US-N仕様 model comparison
Compare 6 models in the same series by specification.
| Model | Pin diameter D |
|---|---|
| RF100-US-N-1 | 9.54 mm |
| RF120-US-N-1 This product | 11.11 mm |
| RF140-US-N-1 | 12.71 mm |
| RF160-US-N-1 | 14.29 mm |
| RF200-US-N-1 | 19.85 mm |
| RF240-US-N-1 | 23.81 mm |
How to choose Chain
Points to check when selecting, with the values for this product (RF120-US-N-1).
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1. Select a pitch that matches the sprocket
The pitch must match the tooth profile of the sprocket, and different pitches cannot be combined. Listed products range from 31.75 to 76.2 mm. Larger pitches increase power transmission capacity, but they also add mass and cause greater vibration and noise at high rotational speeds, so the choice should be based on both rotational speed and load.
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2. Check the load against the maximum allowable tension
This is the upper limit of tension that may be applied in actual use. Multiply the chain tension calculated from transmitted power and speed by a service factor that accounts for starting shock and load fluctuation, and confirm that the result is at or below this value. Listed products range from 39.2 to 151 kN, and heavy-duty types have higher values even at the same pitch.
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3. The minimum tensile strength is the guaranteed breaking value
The minimum tensile strength is the guaranteed breaking load, and listed products range from 149 to 853 kN. The average tensile strength is a higher mean value than this, so the minimum value is used for strength calculations. It is not used as the basis for working load, but is used to check the safety margin against overload.
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4. Verify the inner link width against the tooth width
The inner link width corresponds to the tooth width of the sprocket. Some heavy-duty types can use sprockets for standard roller chains, but there are cases where cast iron sprockets are not permitted, so the tooth width and material conditions must be checked together.
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5. Check compatibility by roller diameter and pin diameter
The roller diameter relates to the tooth bottom shape, and the pin diameter relates to connecting links and wear life. In some cases, successor specifications cannot be connected to previous specifications, so when partially replacing or adding links to an existing chain, dimensions and connectability should be verified against the manufacturer's documentation.
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6. Confirm link count and lead time conditions
Types without offset links (half links) can only be used with an even number of links, and allowance for adjusting the center distance is required. Also, some large-size products are made to order or quoted on each request, so spare parts procurement timing should be included in planning.
This guide was written by AI based on the listed products' documents and specification items.
Description
Materials have been reviewed, and the minimum breaking strength and maximum permissible load are equal to or higher than those of the US specification. The pin diameter is smaller than before, so it cannot be connected to the former US specification chain. Sprockets currently in use can continue to be used as is.
Features
- Successor to the US specification
- Made to order (quote required)
- Not connectable to former US specification chain
FAQ
- Q. Is the RF120-US-N-1 the successor to the former US specification?
- A. Yes. The RF120-US-N-1 is a roller chain that succeeds the US specification. Sales of the US specification were discontinued at the end of September 2016.
- Q. Can the RF120-US-N-1 be connected to former US specification chains?
- A. No, it cannot be connected. The pin diameter is smaller than before, so it cannot be connected to the former US specification chain.
- Q. Can sprockets currently in use be used with the RF120-US-N-1 as is?
- A. Yes. Sprockets currently in use can continue to be used as is.
- Q. How does the strength of the RF120-US-N-1 compare to the US specification?
- A. After reviewing materials, the minimum breaking strength and maximum permissible load are equal to or higher than those of the US specification. The pin diameter D is 11.11 mm.
Written by AI based on the content of the source documents.
Source documents
- Document ウルトラスーパチェーン US 仕様の発売中止と US-N 仕様について 1 pages
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