Draw Bench Chain Selection
A drawing-first checklist for new chain, replacement chain and sprocket-matching projects.
Start With Evidence
Use an equipment drawing when available. For replacement work, combine photos with measured dimensions and a chain sample. Do not infer pitch or pin size from a photograph alone.
Measure The Chain
| Measurement | What To Record |
|---|---|
| Pitch | Center distance between adjacent articulating joints |
| Inner width | Clear width between the inside faces of sidebars |
| Plate height | Maximum sidebar height |
| Plate thickness | Inner and outer plate thickness where they differ |
| Pin diameter | Measured at an unworn section when possible |
| Pin length | Overall and shoulder dimensions if applicable |
| End connection | Carriage or attachment details |
| Installed length | Pitches or measured overall chain length |
Define The Duty
- Maximum required pulling force or machine rating
- Normal working pull and operating speed
- Start/stop frequency and shock loading
- Hours per day and operating cycle
- Lubrication method and maintenance interval
- Scale, dust, coolant, moisture or corrosive exposure
- Operating temperature
Check The Sprocket
Provide tooth count, face width, bore and available pitch/tooth geometry. If the existing sprocket will be reused, include photographs and a dimensional drawing where possible.
Avoid Common Errors
Photo Only
Visual similarity does not prove dimensional interchangeability.
Unknown Load
Without pull data, a chain can be dimensionally similar yet unsuitable for the duty.
Ignored Sprocket
Chain and sprocket geometry must be reviewed together for replacement work.
Selection FAQ
Can you quote from an old chain sample?
Yes, a sample can support replacement identification, but the RFQ should also include machine duty and sprocket information.
Can I use a standard roller chain number?
Only when the machine documentation proves that a standardized roller-chain configuration is intended. Draw bench chains are often engineered around the application.
Which strength value should I provide?
Provide the machine pull requirement or working-load information from the equipment documentation. Do not substitute an unrelated catalogue ultimate-strength number.
Do you need a sprocket drawing?
It is strongly preferred when the existing sprocket will be retained or when tooth geometry is not otherwise documented.