Customer Service was great quick shipment time packaging very well. No damage will leave another review after I get it going. I haven’t hooked it up yet.
5.75" Single Groove A Section 4L Sheave with 7/8" (0.875") H-Style Split Taper Bushing - AK59H
Regular price
$34.95
Use our easy Pulley Size & RPM Ratio Calculator to help verify sizing before you order!
• Solid Steel Bushing
• Single Groove Pulley
• 7/8" Bushing Included
• For Use on 7/8" Shaft
• Outside Diameter of Pulley: 5.75"
• High-Quality Cast Iron Construction
• Accepts: A Section / 4L Section Belts
Manufacturer Resources
Dimensions and Measurements
| 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. | 5.75" |
| 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. | 5.16" |
| 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. | 5.5" |
| Face width (F) Overall width of the sheave measured across the rim. | 3/4" |
| Dimension L | 1-1/4" |
| Dimension P | 9/16" |
| Dimension X | 7/8" |
| Overall length (O.L.) Overall length of the sheave measured through the hub. | 1-1/2" |
| Weight Approximate weight from the manufacturer catalog. | 3.0 lb |
Belt and Operational Information
| 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 |
Product Information
| Part number Masterdrive catalog number for this sheave, including the bore size. | AK59H/H-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. | H-Bushing |
| Bushing The bushing style required to mount this sheave. "None (keyed)" means it mounts directly on the shaft. | H (powdered metal) |
| Material The material the sheave body is cast from. | Gray cast iron |
Bushing dimensions
| Bore Finished bore diameter — the shaft size this bushing fits. | 7/8" |
|---|---|
| Key seat Width and depth of the keyway machined into the bore. | 3/16 x 3/32" |
| Dimension A | 11/32" |
| Dimension B | 1-5/8" |
| Flange O.D. (D) Outside diameter of the flange on the wide end of the bushing. | 2-1/2" |
| Dimension E | 1" |
| Dimension L | 1-11/32" |
| Dimension O.D. | 2" |
| Weight Approximate weight from the manufacturer catalog. | 0.9 lb |
Installation
| Cap screws Quantity and size of the cap screws supplied to draw the bushing into the sheave. | (2) 1/4 x 1 |
|---|---|
| Recommended wrench torque Tighten the cap screws to this torque. Too little and the bushing can slip on the shaft; too much can crack it. | 95 lb-in (8 lb-ft) |
Bushing information
| Part number Masterdrive catalog number for this bushing. | STBH-7/8 |
|---|---|
| Bushing series The bushing family. A sheave is machined for one specific series, so the series must match. | H |
| Style How the bushing grips the shaft. A double split taper compresses onto the shaft as the cap screws are tightened. | Double Split Taper |
| Material The material this bushing is made from. | Powdered metal (incl. set screw over keyway) |