What is a sheave groove?
A sheave (/ʃiːv/) or pulley wheel is a grooved wheel often used for holding a belt, wire rope, or rope and incorporated into a pulley. This allows the wire or rope to move freely, minimizing friction and wear on the cable. Sheaves can be used to redirect a cable or rope, lift loads, and transmit power.
How is the diameter of a sheave measured?
The outside diameter (abbreviated as OD) is the distance across the whole disc of the sheave– this can be easily measured by placing a ruler on the side of the sheave and simply measuring the diameter.
What is the recommended depth of groove for a sheave when using wire rope?
Typically the groove diameter should exceed that of the wire rope by 5% while groove depth should be one-and-a-half times the rope diameter.
What is sheave pitch?
According to ISO 1081:2013, the pitch line is “any circumferential line which keeps the same length when the belt is bent perpendicularly to its base.” In other words, the pitch line is the line internal to the belt that does not change length when the belt is in use.
How do I know if my sheave is worn out?
A sheave gauge, usually consisting of plastic wedges shaped like a new belt, can be inserted into the groove. If the gauge doesn’t fit squarely into the groove and you can see daylight around the edges, your sheave is worn and must be replaced.
Why is a pulley called a sheave?
A pulley is one of six types of simple machines. A sheave (pronounced “shiv”) is actually part of the pulley system. The sheave is the rotating, grooved wheel inside the pulley. This is the piece that the rope fits into.
What is a sheave in the Bible?
Sheaves of grain are revered in the Bible and in ancient cultures. The bundles were appreciated for the hard work that went into growing, harvesting and drying out these beneficial crops. It was the focus of a popular gospel song in the late 1800s.
How do you size a vee belt?
Use a cloth measuring tape (not a steel one) and wrap it around the outside of the belt. You also use a thin string to take this measurement and place it on a steel tape to get the correct length. Next, for “A” Belts (1/2” width) subtract two-inches from the outside measurement to select the correct V-belt.
What is the minimum sheave diameter?
For example, on a flat belt drive on a 207TR40 (Class 1 Service, 5 HP, 14 RPM) centered 2 1/2 inches from the seal face, the minimum sheave pitch diameter allowable is 2.75 inches (2.2 x 1.33 x 0.94). Keep the sheave as close as possible to the seal face and the gear drive housing.
What is the maximum fleet angle allowed for a grooved drum?
The angle between the center line through the lead sheave and the centerline of the rope leading to the drum is called the fleet angle. Experience has shown that the best wire rope service is obtained when the maximum fleet angle is not more than 1½° for smooth drums, and 2° for grooved drums.
What is sheave pitch diameter?
For most belts and sheaves, the dimensions formerly referred to as pitch length (belts) and pitch diameter (sheaves) are now referred to as datum length and datum diameter. In terms of sheave dimensions, the pitch diameter is now equal to the outer diameter for most standard sheaves.
What are the dimensions of a sheave drum groove?
Minimum Sheave Drum Groove Dimensions Groove Radius Groove Radius Groove Radius Nominal Rope Diameter Nominal Rope Diameter New New Worn 1 inches 2 mm 3 inches 4 mm 5 inches 1/4 6.4 .135 3.43 .129 5/16 8.0 .167 4.24 .160
What are the dimensions of a steel sheave?
Sheave Dimensions. We recommend only sheaves made of steel or cast steel. The following are recommended values: Groove radius (r): Minimum 0.53 to 0.535 x d. Maximum 0.55 x d. Recommended: ≈ 1% over the actual wire rope diameter. Groove depth (h): Recommended: ≈ 1.5 x d or d x √2.
What should the groove angle be on a sheave?
Typically, the groove angle is 30°. This provides for better rope support. On occasion, a 45° angle is required for increased fleet angles (up to 4°). G
Is the V belt pulley sheave table chart free?
The following table defiens industry standard V-Belt sheave grooves. We’ve detected that you’re using adblocking software or services. To learn more about how you can help Engineers Edge remain a free resource and not see advertising or this message, please visit Membership.