Belts
Tech Tip — Measure an A Cord Belt
A Fiber Cord is the family name of nylons that include Kevlar®. Oregon® A Fiber Cord belts are the best quality, longest-lasting belts available in the market place.
Examples 75-340 = 3/8" x 40" belt 75-468 = 1/2" x 68" belt 75-598 = 5/8" x 98" belt
Examples A48 = 75-450 B40 = 75-543
Oregon A Fiber Cord belts are measured by the outside cir- cumference and can easily replace an A or B belt. Simply add 2 inches to the length for “A” belts and 3 inches to the length for “B” belts.
Measuring Top Width of A Belts
A Belt Part Numbers Part numbers for the Premium A Fiber Cord belts are coded to save look-up time, are five digits and are determined as fol- lowed:
A. First two digits are always 75- B. Third digit is the width of the belt 3 = 3/8" 4 = 1/2" 5 = 5/8" C. Forth and fifth digit show the length
Tech Tip — Measuring a Belt
Oregon Belt Measurer 75-910 1. Define type of belt :
• 3 L = 3/8" or 9 5 mm • 4L = 1/2" or 12 7 mm • 5L = 5/8" or 15 9 mm
2. Fit the belt over the blue plastic split pulley and pull the bottom half down tight.
2
3. If you are measuring an industrial belt (bulgy top), look at the left-hand slot in the half pulley.
The size (section) of the belt is indicated by the intersection of the belt top with one of the white blocks, either A or B.
3
B
If you have an FHP belt (flat top), the same procedure applies to the right-hand slot. The belt in the photo is a 4L belt (the section). 4. Now that you know the belt’s profile (section), look at the window below the split pulley and find the section number for your belt (3L, 4L, 5L, A or B) printed in white on the left side of the window. The number opposite or closest is the length in inches of the belt you are measuring.
4
75-910
Cloth Tape Measure 1. Place the beginning of the cloth measuring tape anywhere on the outside of the belt 2. Wrap the tape around the complete circumference of the
belt until it wraps back around to its beginning 3. Where the two meet, read the length given
LG 337
Belts
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