Heavy Duty Lawn Mower Belts

Belts are typically designed to last 1,500 hours or two seasons. If you are coming close to this time you may want to order an extra belt before your original belt breaks or wears out. Belts break for one of two reasons: wear and running into fixed objects such as stakes, rocks, stumps, etc. Why do belts wear out? Dished-out pulleys - As a mower accumulates hours, the pulleys will start to dish out (get wider). Once this starts to occur belts are subject to premature failures. Debris migrates to the pulley and accumulates in the groove which causes excess friction that accelerates belt wear. The other reason for wear is improper tension - It's important to make sure there is always proper tension. Your manual should show you how to replace your belt and how to give it the proper tension.

A belt is like a fuse - it's designed to be the weak link. Belts are designed to break to prevent other costly components in the cutting system from breaking. It's far more economical to replace a belt than many other components.

Kevlar and Aramid Belts

Mill Supply carries Kevlar^® belts, Aramid Fiber belts and Premium Belts. Kevlar^® and Aramid fiber belts are made with high-strength fiber cords for heavy duty applications and severe duty cycles. Belt widths range from 3/8" to 1/2" to 5/8" with lengths ranging from 23" to over 100" in length. These belts have a "drier" cover fabric that was designed to increase flexibility and withstand severe clutching action, bending or twisting, heavy loads and backside idler applications. Aramid fiber belts are oil and heat resistant. The belts we list are by mower brand name, and/or by belt type by size. Whether they are used to drive gear boxes, decks or blades, they are shown with the dimensions in inches and millimeters.

Premium Belts

The Premium belts Mill Supply carries meet rigid specifications and are oil and heat resistant. The protective cover is made of a synthetic rubber compound having excellent resistance to heat, oil and abrasion. Available in 3L-3/8", 4L-1/2" and 5L-5/8" widths. Lengths range from 17" through 114" depending on belt width.

Specific Application Belt Listings

• Bobcat Belts
  We include specific belt listings for the drive belt, variable speed belt, engine to blade belt, gear drive belt, deck belt, engine to hydro pump belt, engine to center spindle and transmission belt. Our belt listings include the OEM number it is replacing.
• Bunton Belts
  Mill carries six of the most popular belts with specific applications for Bunton mowers. These replacement belts include the blade belt, drive wheel belt, variable speed belts, and a double wheel drive belt. Deck width sizes range from 36" through 61" cut.
• Cub Cadet Belts
  Specific applications for Cub Cadet belts include belts for decks, PTO drive, and spindle.
  Dixie Chopper Belts. If you need a specific size not mentioned be sure to go to our Kevlar belt and Premium belt pages.
• Dixon Belts
  The 1/2" and 5/8" width belts we carry for Dixon are used on 30" deck, 42" deck and 50" deck. OEM numbers are shown next to the belt listings for a quick reference on these popular belts. For specific belt sizes not listed, see our Kevlar and Premium belt listings.
• Exmark Belts
  There is a variety of belt sizes for the Exmark lawnmower available through Mill Supply. Each of the popular belts we carry has the OEM number it is replacing next to the description. If you do not have the OEM number but do know what size you order, call us with the specifications and we can look up a replacement belt for you.
• Grasshopper Belts
  Very few belts are listed for specific applications on the Grasshopper mower. We carry the 64" drive belt and the 36" PTO belt. For a larger selection see our listings for Kevlar and Premium belts.
• Gravely Belts
  Gravely belts include belts for the drive wheels (2 are used per wheel), PTO belt for the Pro Master mowers, and cutter deck belt. Only a few sizes are listed but fit a number of applications.
• John Deere Belts
  John Deere uses some very long belts. Some of the long length belts we carry are the 91", 95", 103", 138" and 143". John Deere belts come in wrapped or raw edge polyester, wrapped fiberglass, wrap molded aramid cord and raw edge aramid cord construction. Belts listed are: V-Belts, drive belts and primary belt.
• MTD Belts
  One of the most popular Mowers for replacement belts is the MTD mowers. Mill Supply lists 35 specific application belts for these mowers for the blades, decks, transmission, engine and PTO.
• Murray Belts
  Murray belts use unusual part number like 37x65. If you don't have your part number, but still have your old belt, most Murray belts have the part number indented on the flat back side. Use a piece of chalk and rub the back of the belt. Many times the number can be seen when this is done.
• Noma Belts
  Mill Supply carries 1/2" and 5/8" cutter deck belts, a variety of 1/2" section belts, transmission belts, deck drive belts, and blade belts for the Noma mower.
• Scag Belts
  The popular Scag mower uses a large variety of belts due to the vast units designed by them. Mill Supply carries over 25 specific application belts for their most popular models.
  Belt applications include deck belts, drive belts, pump drive belts, blade belts and transmission belts.
• Snapper Belts
  The Snapper replacement belts Mill Supply lists are for the decks, spindles, blade and transmission. Some mower belts for Snapper are cogged for more flexibility. If you have a cogged belt be sure to replace it with the same type or your belt may wear prematurely.
• Toro / Wheel Horse Belts
  Whether your deck belt, drive belt or transmission belt needs replacing on your Toro/Wheel Horse lawn tractor, be sure to check our site. If your belt is not listed on the specific application page you can also search belts in our Kevlar^® and Premium belt section.
• Walker Belts
  Mill Supply has only a few style to choose from for the Walker mower. We have a double cogged, 47" V-belt, a 28" and 35.5" cogged blower belt. OEM numbers are listed next to the description to be sure you are ordering the correct part numbers.
• Yazoo Belts
  Mill Supply carries the 80 inch AA section belt for Red Rider rear engine mower. Other applications will be listed in our universal belt sections under the heading of Kevlar and Premium.