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Conventional V-Belts

Conventional V‑Belts (Classical A, B, C, D, E)

Conventional V‑belts (also called classical belts) are the industry workhorse for industrial, agricultural, and power‑transmission applications. Use this page to understand sizes, decode labels, and jump straight to the replacement you need. 

A / 4L (1/2" top width) B / 5L (21/32" top width) C (7/8" top width) D (1-1/4" top width) E (1-1/2" top width)
How to read the label: The letter indicates the belt section (A, B, C, D, E). The digits that follow indicate the length family (often tied to inside length or outside circumference depending on the section and brand). If you see an X after the section (AX/BX/CX), that’s a notched version for improved flexibility and heat dissipation.

Common Specs at a Glance

A / 4L Section

Top width ~ 1/2" (0.50"). Popular sizes: A38–A100, 4L300–4L950.

B / 5L Section

Top width ~ 21/32" (0.66"). Popular sizes: B36–B120, 5L310–5L1000.

C Section

Top width ~ 7/8" (0.88"). Popular sizes: C67–C240.

D Section

Top width ~ 1-1/4" (1.25"). Popular sizes: D96–D300.

E Section

Top width ~ 1-1/2" (1.50"). Popular sizes: E144–E400.

Tip: If your drive uses small pulleys or a back‑idler, the notched versions (AX, BX, CX) often run cooler and flex easier—check your equipment manual before choosing.

Quick Conversion Chart (Examples)

Use these patterns to translate what you see on the belt to a ready‑to‑order replacement. Always verify fitment for your exact machine.

OEM Part / Label Seen Cross Reference Belt Dimensions / Notes Amazon
A88 / 4L900 A88 A‑section wrapped; outside circumference ≈ 90" (confirm spec by brand) Search A88
AX68 AX68 A‑section notched; better on small pulleys; verify length basis Search AX68
B95 / 5L980 B95 B‑section wrapped; common industrial/ag size; confirm pulley diameters Search B95
BX100 BX100 B‑section notched; improved flex/heat; check length standard Search BX100
C144 C144 C‑section wrapped; heavy‑duty drives; verify OC vs datum length Search C144
D101 D101 D‑section wrapped; 1.25" top width; high HP, large pulleys Search D101

How to Choose Quickly

  • Match the section first (A/B/C/D/E or 4L/5L).
  • Confirm the length basis (inside length, outside circumference, or datum) for your brand/system.
  • Consider notched versions (AX/BX/CX) if your drive has small pulleys or runs hot.
Local sourcing: Many parts stores (e.g., NAPA, CARQUEST) can special‑order by the part number you provide. Handy when you need a belt the same day.

Find It Fast

🔎 Quick searches on CrossBelts:  A‑Section  |  B‑Section  |  C‑Section  |  D‑Section  |  E‑Section

Disclaimers

Fitment: Manufacturer names and part numbers are used for identification and cross‑reference only. It is your responsibility to verify compatibility and specifications for your machine before purchasing.
Affiliate Notice: As an Amazon Associate, CrossBelts may earn commissions from qualifying purchases. Some links on this page lead to Amazon or other affiliate programs.

Conventional V-Belts

Search for your Parts Cross Reference

V‑Belt Finder Search Tool

Enter a belt number (e.g., A88, BX70, 5L600, 3VX560) and hit Search.

Tip: Try the kevlar “K” variant too (e.g., 5L600K) if applicable.
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