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Cast Iron 3.5" Single Groove V Style Section A Belt 4L 3/4" Shaft Pulley
Masterdrive single groove 3.5" pulley for A section / 4L belts. This is a high-quality cast iron pulley. This pulley is designed to fit a 3/4" keyed shaft and features dual set screws to ensure a completely secure fitting. Most pulleys that are similar to this only have one set screw, making them less reliable in many working conditions. This pulley is designed to be used with A Belts (also known as 4L Belts).
Specifications:
• 3.5" Diameter
• Single Groove
• Fits 3/4" Keyed Shaft
• Features Dual Set Screws
• Accepts A section / 4L belts
• Solid Cast Iron Construction
• Secure Reliable Performance
| Bore Diameter of the center hole that slides onto the shaft. | 3/4" |
|---|---|
| Outside diameter (O.D.) Overall diameter measured across the outer rim of the sheave. Use the pitch diameter, not this figure, for speed and ratio calculations. | 3.45" |
| Pitch diameter — 3L The effective diameter where a 3L belt rides in the groove. This is the figure to use for drive speed and ratio calculations. | 2.86" |
| Pitch diameter — 4L / A The effective diameter where a 4L or A section belt rides in the groove. This is the figure to use for drive speed and ratio calculations. | 3.2" |
| Hub diameter (M) Outside diameter of the sheave hub. | 1.6" |
| Face width (F) Overall width of the sheave measured across the rim. | 21/32" |
| Dimension L | 15/16" |
| Dimension P | 7/16" |
| Dimension C | 5/32" |
| Weight Approximate weight from the manufacturer catalog. | 1.2 lb |
| Belt sections The V-belt cross sections this sheave is designed to accept. | 3L, 4L, A |
|---|---|
| Number of grooves How many belts the sheave can carry. | 1 |
| Maximum speed Maximum recommended rim speed in feet per minute. Running a sheave faster than this risks failure. | 6500 FPM |
| Part number Masterdrive catalog number for this sheave, including the bore size. | AK34-3/4 |
|---|---|
| Sheave type Masterdrive construction designation for the sheave body, such as Type 3 with a solid web. | 2 s (Type 2, solid) |
| Construction Whether the sheave is bored to a finished size and keyed directly to the shaft, or requires a separate bushing to mount. | Bored-to-size (keyed) |
| Bushing The bushing style required to mount this sheave. "None (keyed)" means it mounts directly on the shaft. | None (keyed) |
| Material The material the sheave body is cast from. | Gray cast iron |
| Set screws Quantity and size of the set screws supplied to lock the sheave to the shaft. | (2) 5/16-18 knurled |
