BESTORQ A35 or 4L370 V-Belt, Classic Wrapped Rubber X3 V-Belt, Black, 37" Outside Circumference x .51" Width x .34" Height, P

4.5 4.5 out of 5 stars | 852 ratings

Price: 11.5

Last update: 01-10-2025


About this item

BESTORQ X3 fabric wrapped V-belts bring in a new generation of wrapped V-belt performance; These belts are constructed of highly engineered, high-performance components that are manufactured using the latest in belt technology available on a global basis
They are specially designed to be low maintenance and are proven to be extra durable for belt life that will outlast the competition; Reduced maintenance downtime and increased machine uptime means you save time and money
The helically wound tensile cords are created of a pre-stretched polyester material specially engineered, twisted, then set by both heat and chemical means; Testing has proven that the tensile decay properties of BESTORQ Cord are truly World Class
X3 v-belts are amazingly uniform and smooth running; With excellent adhesion between components and low stretch tensile cords, they have very low elongation and will not require any rechecks or retensioning if installed at the correct recommended tension
The BESTORQ A35 or 4L370 v-belt has a 37" outside circumference, 35" inside circumference, .51" width, and a .34" height; See images for cross section schematic

From the manufacturer

Bestorq Banner Website
X3 Hero Image

Bestorq Logo
Our main business is manufacturing Power Transmission Belts

Bestorq was incorporated in 2006, and brings over 81 years of combined engineering experience to help even the toughest application.

Product is designed, developed and tested in Lincoln, Nebraska

Classical Wrapped V-Belts

A or 4L Cross Section

The belts exceed USA RMA published ratings levels. They are designed to perform at the identical or higher level than all other major USA Manufacturer’s belts of the same type.

The body rubber compound is a highly engineered synthetic rubber compound, specially compounded for cool running, flexibility, crack resistance, and excellent bonding to the outer fabric and tensile cords.

  • The outer fabric wrap is treated with highly oil and heat resistant, engineered synthetic rubber compound, specifically compounded for excellent wear resistance
  • The helically wound tensile cords are specially engineered, twisted, heat and chemically set, polyester material

Aor4L Classic Wrapped IC OC

Understanding Part Numbers and Circumference

AXX

XX - Inside Circumference

Example: A30 = 1/2" Wide; 30" IC (32" OC)

4LXXX

XXX = Outside Circumference

Example: 4L400 = 1/2" Wide; 40" IC

X3 Classic Wrapped V-Belt Cross Section

Bestorq X3 Cross Section

Single V-Belt Dimensions

Cross Section Dimensions

For A or 4L Bestorq X3 Classic Wrapped V-belts:

Top Width: .51"

Thickness: .34"

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Customer Reviews
4.5 out of 5 stars
852
4.7 out of 5 stars
89
4.1 out of 5 stars
10
5.0 out of 5 stars
3
4.2 out of 5 stars
4
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Price $10.95 $14.99 — — — $146.14
Explore More from Bestorq Classic Wrapped V-Belt Classic Cogged V-Belt Lawn & Garden V-Belt Double Sided V-Belt BESTLINK Linked V-Belts Classic Wrapped Wedge Belt
These raw-edge notched belts allow for higher load ratings than standard wrapped belts. Great for Lawn & Garden equipment of all types, Ag Equipment and all types of inductrial drives, especially where misalignment clutching or backside idlers are present A temporary replacement or permanent substitute for conventional rubber v-belts. Simply “Twist and Lock” belt tabs into place, no need for special tools. Made from pre-strectched polyester cord for industrial strength
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Customer Reviews
4.6 out of 5 stars
7
4.6 out of 5 stars
140
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4.6 out of 5 stars
18
Price — $22.03 — $106.54
Even More from Bestorq Automotive Serpentine HTD Timing Belts Banded Cogged Banded Classic Wrap
Our Automotive “K” (or called ”PK”) belts are stocked in OEM quality EPDM construction with HMLS tension cords. This is the belt used on many Original Equipment cars around the world. A good !t in all three major metric round tooth pulley pro!les found in North America (RPP, HTD, and PGGT2) with clearance to enter and exit the di"erent pulley pro!le shapes.

Top reviews from the United States

  • The Wa
    5.0 out of 5 stars Strong
    Reviewed in the United States on November 10, 2024
    Perfect fit. High quality as described fair to Google value. Prime member so shipping was free so great value for the money. Bought at 1 pm here the next morning at 7am WOW
  • Pete
    5.0 out of 5 stars As advertised
    Reviewed in the United States on September 5, 2024
    As advertised, it fit and has been working on my old line trimmer. Via PRIME, bought and delivered for less than a trip to the store would have cost me. Excellent.
  • GlassBullies
    5.0 out of 5 stars Quality build, perfect fit.
    Reviewed in the United States on August 17, 2024
    As the title says, replaced the belt on my attic fan. The fit was exact and you can tell no corner's were cut during manufacturing. I highly recommend any product from this company.
  • James A. Carvalho
    4.0 out of 5 stars Well made
    Reviewed in the United States on July 8, 2024
    Nice quality finish
  • Douglas Derby
    5.0 out of 5 stars Classic belt
    Reviewed in the United States on August 29, 2024
    Matched pair for a very old aapplication. Working great at a very good price
  • Tyrone Burns
    5.0 out of 5 stars compressor belt
    Reviewed in the United States on November 7, 2024
    great price
  • James Merriman
    5.0 out of 5 stars Great cheap alternative to OEM.
    Reviewed in the United States on December 28, 2024
    Great cheap alternative to OEM.
  • Bill
    1.0 out of 5 stars Didn’t last 6 months
    Reviewed in the United States on October 30, 2024
    Bought in March for riding mower drive belt (not mower deck). Installed in April and it shredded in September. Didn’t last a full season and I usually get 2-3 years from a drive belt. Won’t buy again.

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