Black AX cogged drive belt AX136 on white background
Black AX cogged drive belt AX136 on white background

HVAC & Equipment V-Belt B149, Classical B-Section Drive Belt

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$34.95
Regular price
$45.99
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$11.04 (24%)

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BELT SLIPPING OR WORN?

HVAC & Equipment V-Belt B149, Fixes Belt Slipping

Wrapped classical B-section drive belt for HVAC, fans, blowers, pumps, conveyors, mixers and industrial machinery.

Part B149 Approx. 152" 21/32" Top Width

The B149 V-belt transfers motor power to a compatible driven sheave. The B number is the primary classical belt designation. Match the original marking, section and manufacturer specifications before ordering.

Cross-Reference Information

Verified Classical NumbersB149
Published Length InformationApproximate nominal outside length: 152" — verify the supplying manufacturer
Cogged AlternativeNo BX crossover was added because this size was not found in the official BX size table used for this audit.
Belt ProfileB section, 21/32" × 7/16", 40°

Important: Manufacturer-published outside lengths can vary because the B designation is based on an industry classical length system and accurate belt measurement requires prescribed pulleys and tension. Match the complete part number rather than measuring a loose belt by hand.

Is This the Right Belt?

Primary Part NumberB149
Cross SectionClassical B section
Top Width21/32" / approximately 16.7 mm
Nominal Thickness7/16" / approximately 11.1 mm

Common Symptoms

  • Belt slips or squeals under load
  • Fan, blower, pump or conveyor runs slowly
  • Black belt dust appears around the sheaves
  • Belt is glazed, cracked, stretched or frayed

Check Before Replacing

  • Confirm the B-section profile and full original belt marking
  • Inspect sheaves for worn, polished, rusted or dished grooves
  • Check shaft alignment and bearing condition
  • Confirm the required service rating and tension specification
Pro Tip: A new belt can fail early when sheaves are worn, shafts are misaligned, bearings drag or tension is excessive. Correct the root cause before installation.

Installation Notes

  1. Disconnect and lock out electrical power.
  2. Relieve drive tension according to the equipment service manual.
  3. Do not pry the belt over a pulley; create enough slack for installation.
  4. Align the pulleys and set tension to the equipment manufacturer's specification.
  5. Rotate the drive by hand, reinstall guards, restore power and test operation.

Verified Compatible Equipment Models

No manufacturer-published model-level fitment was verified for this universal classical belt. Verified sources publish broad applications including mixers, pumps, conveyors, fans, blowers, compressors and general industrial drives. Match by exact belt designation and equipment specifications—not equipment category alone.

Search and crossover terms: B149.

✅Compatibility & Cross Reference

Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.

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