Example 1
13 mm top width and 8 mm height may indicate A section.
Tools
V-Belt Section Identifier
Identify probable V-belt sections from top width and height measurements. This tool is designed for practical industrial belt identification, not absolute precision.
Probable matches
The cards below are sorted by closeness. Strong matches appear first, then closer alternatives if the measurements sit between sections.
Enter measurements to see probable section matches.
What is a V-belt section?
A V-belt section defines the basic cross-section of the belt. It determines the top width, height, and the pulley groove profile that the belt can work with.
In practical terms, section identification helps match the belt to the correct pulley family before a replacement order is placed.
Common V-belt sections
Classical sections include Z, A, B, C, D, and E. Wedge sections include SPZ, SPA, SPB, and SPC. Narrow sections include 3V, 5V, and 8V.
These families look similar at a glance, but the belt section changes width, height, and pulley compatibility.
Why correct section identification matters
- • Correct section fit helps the belt sit properly in the pulley groove.
- • Mismatched sections can slip, run hot, and wear early.
- • Using the wrong section can cause poor replacement decisions even if the length seems close.
- • Factories and workshops should confirm both section and length before placing an order.
Common mistakes
- • Measuring worn belts and treating the result as the original size.
- • Confusing SPA with A because the dimensions look close.
- • Ignoring belt height and checking only width.
- • Measuring one side of the belt without comparing both dimensions.
Practical examples
Example 2
17 mm top width with a wedge profile may indicate SPB.
Comparison table
| Section | Width | Height | Pitch width | Type |
|---|---|---|---|---|
| Z | 10 mm | 6 mm | 8.5 mm | classical |
| A | 13 mm | 8 mm | 11 mm | classical |
| B | 17 mm | 11 mm | 14 mm | classical |
| C | 22 mm | 14 mm | 19 mm | classical |
| D | 32 mm | 19 mm | 27 mm | classical |
| E | 38 mm | 23 mm | 32 mm | classical |
| SPZ | 10 mm | 8 mm | 8.5 mm | wedge |
| SPA | 13 mm | 10 mm | 11 mm | wedge |
| SPB | 17 mm | 14 mm | 14 mm | wedge |
| SPC | 22 mm | 18 mm | 19 mm | wedge |
| 3V | 9.5 mm | 8 mm | 9.5 mm | narrow |
| 5V | 15.9 mm | 13 mm | 15.9 mm | narrow |
| 8V | 25.4 mm | 23 mm | 25.4 mm | narrow |
Internal links
Use the belt length converter when you also need Li, La, or Lp sizing.
Read how to measure a V belt correctly for practical length measurement methods.
See Li, La, and Lp belt size difference for length reference guidance.
Where section identification is useful
Check the replacement family before ordering from V belts or industrial belts.
In workshops, factories, and dealer counters, width and height checks can help narrow the correct section before the final confirmation step.
If the measurements remain unclear, contact GM Traders for practical support.
Frequently asked questions
Can a worn belt still be identified?
Yes, but the result should be treated as a probable match because wear can reduce the measured dimensions.
Why do classical and wedge sections overlap?
Some widths are close enough that the height and profile shape must also be checked before choosing a section.
Should I rely only on this tool?
No. This tool helps narrow the section, but the printed marking, pulley fit, and application should still be confirmed.
Visual placeholders
- • Section profile diagrams
- • Pulley compatibility visuals
- • Cross-section comparison chart
Need help confirming a belt?
Share the measured top width, height, belt marking, and application with GM Traders. The team can help you confirm whether a classical, wedge, or narrow section is the practical fit for your replacement.
Ready to request belt supply?
Send the belt category, quantity, and city, and GM Traders will respond with the next step.