V-Belt Profile Chart (A, B, C, D, E Sections)
The top width and thickness of each V-belt section, and how a length code such as B50 reads. No account, nothing to install.
Reference only
These are general industry reference values, not a guarantee for your specific equipment. Always verify against the manufacturer's own specifications. You are responsible for doing your own research before acting on this.
V-Belt Profile & Dimensions
Length code explainer: e.g. "B50" = B-section, 50" inside length.
| Section | Top width | Thickness | Notes |
|---|---|---|---|
| A / AX | 1/2" (0.50") | 5/16" (0.31") | AX is the cogged / raw-edge version |
| B / BX | 21/32" (0.66") | 13/32" (0.41") | BX is the cogged / raw-edge version |
| C / CX | 7/8" (0.88") | 17/32" (0.53") | CX is the cogged / raw-edge version |
| D | 1-1/4" (1.25") | 3/4" (0.75") | Heavy industrial section |
| E | 1-1/2" (1.50") | 1" (1.00") | Extra heavy industrial section |
Frequently asked questions
How do I read a V-belt length code like B50?
The Equipment Tracker app reads it this way: B50 is a B-section belt with a 50 inch inside length. The letter is the section and the number is the inside length in inches.
What is the difference between a B belt and a BX belt?
The profile is listed together: B / BX share one width and thickness in the table, and the note beside it says BX is the cogged / raw-edge version. The same note is given for A / AX and C / CX.
How wide and thick is a B section V-belt?
The app's table lists the B / BX section at 21/32" (0.66") top width by 13/32" (0.41") thickness.
Which sections are heavy industrial?
The table describes D as the heavy industrial section and E as the extra heavy industrial section.
Does this page cover 3V, 5V or 4L belts?
No. The Equipment Tracker app's profile chart lists the A, B, C, D and E sections (with AX, BX and CX), so those are the only rows shown. For converting a classical belt number to its 4L equivalent use the belt cross-reference page.
Does this page store anything or need an account?
No to both. These are general industry reference values, not a guarantee for your specific equipment. Always verify against the manufacturer's own specifications.
Keep each unit's belt size and service history in Equipment Tracker
Write the belt section and length on the unit once and it is there on the next service call, on your phone, with or without signal. The core of the app is free on the phone, and every first plan, Pro or Team, starts with a 7-day free trial.
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