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Cast Iron 3.75" Dual Groove Belt A Section 4L Pulley for 7/8" Shaft
Masterdrive dual groove 3.75" cast iron pulley that fits a 7/8" shaft. Designed to work with A section belts and is a high-quality pulley measuring 3.75" outside diameter. This pulley accepts A Section also known as 4L series belts and is 1/2" wide.
Specifications:
• 1 Piece Pulley
• Dual Groove Pulley
• For Use on 7/8" Shaft
• Outside Diameter of Pulley: 3.75"
• High-Quality Cast Iron Construction
• Accepts: A Section / 4L Section Belts
| Bore Diameter of the center hole that slides onto the shaft. | 7/8" |
|---|---|
| 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. | 3.75" |
| 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. | 3.16" |
| 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. | 3.5" |
| Hub diameter (M) Outside diameter of the sheave hub. | 1.9" |
| Face width (F) Overall width of the sheave measured across the rim. | 1-3/8" |
| Dimension L | 1-11/32" |
| Dimension P | 15/32" |
| Dimension C | 1/2" |
| Weight Approximate weight from the manufacturer catalog. | 2.8 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. | 2 |
| 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. | 2AK39-7/8 |
|---|---|
| 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 |
